Top 10 App Developer Interview Questions

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Describe your experience with mobile app development.

Purpose: To gain insight into the candidate's background and their proficiency in mobile app development.

Sample answer: "I have seven years of experience developing mobile applications for both iOS and Android platforms. My expertise includes working with Swift, Kotlin, and Flutter, and I have successfully launched over 20 apps on the App Store and Google Play."

Why it works: This answer summarizes the candidate's experience and showcases their familiarity with major mobile platforms and programming languages.

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What mobile app development frameworks and tools are you proficient in?

Purpose: To assess the candidate's technical skills and knowledge of essential development tools.

Sample answer: "I am proficient in using Xcode, Android Studio, and Visual Studio Code. I also have experience with frameworks such as React Native and Xamarin for cross-platform development."

Why it works: This response demonstrates the candidate's ability to work with multiple development environments and frameworks, indicating they have a broad skill set.

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How do you approach mobile app user interface (UI) and user experience (UX) design?

Purpose: To understand the candidate's design philosophy and process in creating intuitive user experiences.

Sample answer: "I prioritize user-centric design by conducting thorough user research and creating wireframes and prototypes. I focus on simplicity, responsiveness, and accessibility to ensure a seamless user experience."

Why it works: This answer highlights the candidate's methodical approach to UI/UX design and emphasizes their commitment to creating user-friendly applications.

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Please explain a challenging problem you solved in a mobile app project.

Purpose: To evaluate the candidate's problem-solving skills and ability to overcome technical challenges.

Sample answer: "In one project, we faced significant battery drain issues due to background processes. I optimized the app by refactoring the code, reducing unnecessary background tasks, and implementing efficient data handling techniques, significantly improving battery performance."

Why it works: This answer showcases the candidate's technical problem-solving abilities and capacity to address and resolve complex issues.

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How do you stay updated with the latest trends and technologies in mobile app development?

Purpose: To determine the candidate's commitment to continuous learning and staying current in a fast-evolving industry.

Sample answer: "I regularly read industry blogs, participate in developer forums, attend tech conferences, and take online courses. I also experiment with new technologies in personal projects to stay ahead of the curve."

Why it works: This response shows the candidate's proactive approach to professional development and dedication to staying informed about industry advancements.

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Describe your experience working in a team environment on mobile app projects.

Purpose: To assess the candidate's teamwork and collaboration skills, which are crucial in mobile app development.

Sample answer: "In my previous role, I worked closely with designers, product managers, and other developers to ensure smooth collaboration. I participated in daily stand-ups, code reviews, and sprint planning meetings to keep the project on track."

Why it works: This answer emphasizes the candidate's ability to collaborate effectively within a team, which is essential for successful mobile app development.

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What is your process for debugging and testing mobile apps?

Purpose: To understand the candidate's approach to ensuring app quality and stability.

Sample answer: "I follow a systematic debugging process, starting with identifying the issue through testing and user feedback. I use tools like Firebase Crashlytics for crash reporting and TestFlight for beta testing. I also conduct extensive manual testing on different devices and emulators."

Why it works: This response outlines a thorough and systematic approach to debugging and testing, indicating the candidate's attention to detail and commitment to delivering high-quality apps.

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How do you handle feedback and criticism on your mobile app projects?

Purpose: To evaluate the candidate's openness to feedback and ability to improve their work based on constructive criticism.

Sample answer: "I view feedback as an opportunity for growth. I actively seek input from users, peers, and stakeholders and carefully analyze their suggestions to make improvements. Constructive criticism helps me refine my work and deliver a better final product."

Why it works: This answer demonstrates the candidate's positive attitude toward feedback and their willingness to adapt and improve based on input from others.

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Please give me an example of a feature you designed and implemented in a mobile app.

Purpose: To assess the candidate's creativity and ability to contribute innovative ideas to mobile app development.

Sample answer: "In a recent project, I designed and implemented a custom notification system that allowed users to set personalized reminders based on their preferences. This feature increased user engagement and retention by providing timely and relevant notifications."

Why it works: This response highlights the candidate's creativity and technical skills, showing their ability to design and implement innovative features.

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What strategies do you use to ensure your mobile apps are accessible to all users?

Purpose: To understand the candidate's approach to making apps inclusive and accessible to a diverse audience.

Sample answer: "I prioritize accessibility by implementing features such as adjustable font sizes, voice-over support, and high-contrast themes. I also conduct usability testing with users with accessibility needs to identify and address inclusivity issues."

Why it works: This answer shows the candidate's commitment to inclusivity and their practical steps to ensure apps are accessible to a broad audience.

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$50 hourly
Emmanuel I.
- 4.8
- (18 jobs)
Luton, ENGLAND
Mobile App Development
Mobile App Design
Android
iOS
Mobile App
Flutter Stack
Flutter

Do you need SEO but don’t know what to do? Do you need someone to guide you through the process? Here’s what I can do for you: - Give you the guidance you need to get more traffic through Google. - Give you the advice and support you need to attract more customers. - Help take some of the pressure off your shoulders. SEO has become more competitive and challenging than ever. That’s why I’m here to make thing easier for you. Love the sound of that? Click the white "Hire Now" button above so that we can talk more about your goals.
$45 hourly
Wachira N.
- 4.9
- (32 jobs)
Kiambu, KIAMBU
Mobile App Development
Social Media Advertising
NodeJS Framework
Media Buying
Wix
Shopify
Webflow
WordPress Website
Social Media Marketing
HTML
CSS
PHP
JavaScript
WordPress
Web Development

7+ years of great and very successful web design. I'm an experienced Web Engineer and expert in Web Designing, Graphic Designing, Development, and Execution in a wide range of Static & Dynamic Web Sites on different platforms such as Photoshop & illustrator Designing, HTML, CSS, Bootstrap, WordPress + WooCommerce and Core PHP. Expertise in React, TailwindCSS, Python, Django, Flask, Nodejs and AWS. Have a project you'd like an expert wordpress developer to help you work on? Reach out to me and lets discuss about your project. I really look forward to hearing from you. Feedback from real clients: "Nick was super-responsive and did a great job. He was not only fast and reliable, but he acted pro-active, canny, and effective at any time, too. I'm looking very much forward to our upcoming collaborations." "Nick is such a proffesional. 100% recommended!" "I had a great experience working with Nicholas. He delivered within the scheduled time and his output was amazing. He was also very responsive in my communication with him. I will definitely work with him in future projects" "Wonderful experience working with Nick. Did everything and more than expected. He is truly a DIVI expert and bent over backwards to execute vision for the site. Highly recommend him."
$35 hourly
Luthfi A.
- 5.0
- (28 jobs)
Bandung, BANDUNG CITY
Mobile App Development
API Integration
Review or Feedback Collection
Firebase
Map Integration
React
Flutter
Vue.js
Firebase Cloud Firestore
Dart
WordPress
CSS
HTML
PHP
JavaScript

Senior Flutter Developer with 7+ years of experience building scalable mobile applications for startups and international clients. I help businesses turn ideas into production-ready mobile apps, from architecture and development to App Store & Google Play deployment. Over the years, I’ve worked with clients from Australia, Singapore, Poland, USA, UK, and more. Delivering high-quality apps with clean UI, strong performance, and reliable communication. What I can help you with: ✔ Flutter mobile app development ✔ Cross-platform iOS & Android apps ✔ Firebase integration ✔ REST API integration ✔ CI/CD setup (Codemagic, Fastlane, Shorebird) ✔ App Store & Google Play deployment ✔ Flutter web & desktop apps ✔ UI/UX-focused implementation ✔ Bug fixing & performance optimization Why clients work with me long-term: ✅ 3000+ Upwork hours completed ✅ Long-term contracts & repeat clients ✅ Strong communication & reliable delivery ✅ Experience working with remote teams ✅ Product-focused mindset, not just coding I focus on building stable, maintainable, and scalable applications — while making the development process smooth and transparent for clients. If you need a reliable Flutter developer who can work independently and deliver production-quality results, feel free to invite me to your project.

$50 hourly
Emmanuel I.
- 4.8
- (18 jobs)
Luton, ENGLAND
Mobile App Development
Mobile App Design
Android
iOS
Mobile App
Flutter Stack
Flutter

Do you need SEO but don’t know what to do? Do you need someone to guide you through the process? Here’s what I can do for you: - Give you the guidance you need to get more traffic through Google. - Give you the advice and support you need to attract more customers. - Help take some of the pressure off your shoulders. SEO has become more competitive and challenging than ever. That’s why I’m here to make thing easier for you. Love the sound of that? Click the white "Hire Now" button above so that we can talk more about your goals.
$45 hourly
Wachira N.
- 4.9
- (32 jobs)
Kiambu, KIAMBU
Mobile App Development
Social Media Advertising
NodeJS Framework
Media Buying
Wix
Shopify
Webflow
WordPress Website
Social Media Marketing
HTML
CSS
PHP
JavaScript
WordPress
Web Development

7+ years of great and very successful web design. I'm an experienced Web Engineer and expert in Web Designing, Graphic Designing, Development, and Execution in a wide range of Static & Dynamic Web Sites on different platforms such as Photoshop & illustrator Designing, HTML, CSS, Bootstrap, WordPress + WooCommerce and Core PHP. Expertise in React, TailwindCSS, Python, Django, Flask, Nodejs and AWS. Have a project you'd like an expert wordpress developer to help you work on? Reach out to me and lets discuss about your project. I really look forward to hearing from you. Feedback from real clients: "Nick was super-responsive and did a great job. He was not only fast and reliable, but he acted pro-active, canny, and effective at any time, too. I'm looking very much forward to our upcoming collaborations." "Nick is such a proffesional. 100% recommended!" "I had a great experience working with Nicholas. He delivered within the scheduled time and his output was amazing. He was also very responsive in my communication with him. I will definitely work with him in future projects" "Wonderful experience working with Nick. Did everything and more than expected. He is truly a DIVI expert and bent over backwards to execute vision for the site. Highly recommend him."
$35 hourly
Luthfi A.
- 5.0
- (28 jobs)
Bandung, BANDUNG CITY
Mobile App Development
API Integration
Review or Feedback Collection
Firebase
Map Integration
React
Flutter
Vue.js
Firebase Cloud Firestore
Dart
WordPress
CSS
HTML
PHP
JavaScript

Senior Flutter Developer with 7+ years of experience building scalable mobile applications for startups and international clients. I help businesses turn ideas into production-ready mobile apps, from architecture and development to App Store & Google Play deployment. Over the years, I’ve worked with clients from Australia, Singapore, Poland, USA, UK, and more. Delivering high-quality apps with clean UI, strong performance, and reliable communication. What I can help you with: ✔ Flutter mobile app development ✔ Cross-platform iOS & Android apps ✔ Firebase integration ✔ REST API integration ✔ CI/CD setup (Codemagic, Fastlane, Shorebird) ✔ App Store & Google Play deployment ✔ Flutter web & desktop apps ✔ UI/UX-focused implementation ✔ Bug fixing & performance optimization Why clients work with me long-term: ✅ 3000+ Upwork hours completed ✅ Long-term contracts & repeat clients ✅ Strong communication & reliable delivery ✅ Experience working with remote teams ✅ Product-focused mindset, not just coding I focus on building stable, maintainable, and scalable applications — while making the development process smooth and transparent for clients. If you need a reliable Flutter developer who can work independently and deliver production-quality results, feel free to invite me to your project.
$57 hourly
Christopher B.
- 5.0
- (5 jobs)
Rotterdam, Netherlands
Mobile App Development
React Native
Objective-C
Backbone.js
Ruby
React
Ruby on Rails
Laravel
Node.js

My professional life has been deeply involved with the IoT since the inception of the web and I spend greater part of my half life working on web and mobile app development to help tech startups & growth companies increase growth & profits by improving exception and performance. If you're looking for an honest web developer to create something that engages your audience, generates leads and makes your job easier, I'm your guy! My technical specialties are: - HTML5, CSS3/SASS/LESS/Stylus - React, Vue, Angular, Backbone, Ember - React Native, Expo, ExpoKit, Flutter - Redux, Redux-saga, thunk, Mobx, Apollo/GraphQL - Contentful CMS, Netlfiy CMS - Node, Express, Ruby on Rails, Django, Flask - AWS, Digital Ocean, Heroku, GCP - Objective-C, Swift, Cocoapods, Java, Native SDKs - Jest, Enzyme, Mocha, Chai, Jasmine - MySQL, PostgreSQL, MongoDB, FirebaseDB, DynamoDB, AzureDB, CouchDB The NEXT STEP is to contact me so we can start the conversation about your project. We can schedule a call and work out the details in plain English. Don't worry about a big sales pitch. I'm not that guy. The goal is to find out if we're a good fit. If we decide to move forward, you can look forward to an honest working relationship that will help your business grow. Sound fair? To get the conversation started, click the "Hire Now" link (or fill out the form) on the top right corner of this page.
$50 hourly
Sunil S.
- 5.0
- (1 job)
Sydney, NSW
Mobile App Development
Amazon EC2
AWS CloudFront
Web Development
Kubernetes
DevOps
Terraform
Linux
JavaScript
Node.js
PHP
Android Studio
Android
React
TypeScript

I have completed BCA(Bachelor of Computer Application) and have good knowledge of programming, especially in Js, PHP, and java. Now I work as a backend developer / DevOps engineer. And pursuing masters of applied information technology in victory university sydney.
$44 hourly
Mayur K.
- 5.0
- (6 jobs)
Weymouth, ENGLAND
Mobile App Development
Web Development
iOS Development
Android App Development
Swift
React Native
CRM Software
ERP Software
Web Application Development
SaaS Development
ASP.NET MVC
ASP.NET Core
.NET Framework
ASP.NET
.NET Core

I’m Mayur, a Senior Project Consultant at Valletta Software Development. My mission is to deliver exceptional software development services tailored to your needs. I specialize in assigning the right experts to your project, ensuring everything is executed seamlessly and to the highest standards. At Valletta Software, we are proud to be a "Top Rated Plus" agency with a 100% Job Success rate on Upwork. Our team of 100+ skilled developers, designers, analysts, DevOps engineers, and testers is here to bring your vision to life. ✨ Our Services Include: ➡️ Front-end Development: Angular, React, TypeScript ➡️ Back-end Development: C#, .NET Core, Node.js ➡️ Mobile App Development: React Native, Flutter, NativeScript, Ionic ➡️ UI/UX Design and Development ➡️ Quality Assurance: Automated and Manual Testing ➡️ Big Data, AI & Machine Learning: Predictive Analytics and Custom Solutions ➡️ Blockchain Development: Smart Contracts, DeFi, Tokens, ERC, NFT Let’s create something extraordinary together! Feel free to reach out, and we’ll build innovative solutions that exceed expectations.
$40 hourly
Muhammad F.
- 5.0
- (14 jobs)
Lahore City, Pakistan
Mobile App Development
DevOps
PHP
Supabase
n8n
Bug Fix
Web Development
OpenAI Codex
Docker
PostgreSQL
FastAPI
Claude
Automation
Machine Learning
TypeScript
Next.js
Artificial Intelligence
React
LangChain
Python

6 years ago I started freelancing with Python and Django. Since then I've built payment platforms used by Amazon sellers at scale, deployed enterprise software across six countries for a UK tech firm, and shipped products for startups from San Francisco to Dubai. That work taught me the difference between code that looks clean in a repo and code that actually holds up when real users hit it. Most of my work right now sits where full stack development meets AI. I build LangChain-powered automation, RAG pipelines over real document libraries, multi-agent systems using the Claude and OpenAI APIs, and Web3 platforms with actual wallet integration, not just tutorial-level stuff. I use Claude Code and Codex in my daily workflow, which means I ship faster than most without the quality drop that usually comes with that. For founders who need an MVP or POC done right and done quickly, I work with Supabase, Railway, and Vercel. You get something real in your hands fast, built on a foundation that won't need a full rewrite in 6 months. For the heavier builds, multi-tenant SaaS, high-traffic APIs, cross-platform mobile with Flutter, full blockchain DApps, I bring Django, FastAPI, React, Next.js, TypeScript, PostgreSQL, Docker, AWS, and n8n automation to the table. Top Rated on Upwork since 2020. Clients in the US, UK, UAE, Australia, and Germany. Even if you're still figuring out the scope, reach out. I'm good at helping clients get clarity on what they actually need before a single line of code gets written.
$69 hourly
Faheem K.
- 4.8
- (150 jobs)
Peshawar, DU
Mobile App Development
iOS
TypeScript
Java
UIKit
App Store Optimization
PostgreSQL
Android Studio
Apple Xcode
Mobile App
API Integration
Mobile App Design
JetPack
SwiftUI
Kotlin
Swift
Flutter
React Native
Android App Development
iOS Development

Mobile App Developer building production-ready iOS & Android apps — native (Swift, SwiftUI, Kotlin, Jetpack Compose) and cross-platform (React Native, Flutter). Shipped to App Store & Google Play. ⭐ $100K+ earned · 150+ projects · 2,378+ hours on Upwork · Fast English communication I design, build, and launch mobile apps that are fast, beautiful, and ready for real users — from a first MVP to a full production release, or rescuing an app that's stuck. WHAT I BUILD • Native iOS apps — Swift, SwiftUI, UIKit, Xcode, Combine, Core Data, CloudKit • Native Android apps — Kotlin, Jetpack Compose, Coroutines, Room, Retrofit, MVVM • Cross-platform apps — React Native & Flutter (one codebase, both stores) • AI-powered mobile apps — ChatGPT/Claude, on-device ML, smart features • App rescue & modernization — fix crashes, slow performance, rejected builds EVERY APP INCLUDES • Clean architecture (MVVM / Clean) so the code scales • Firebase or custom REST/GraphQL backend integration • Real-time features, push notifications, in-app purchases, offline-first • Pixel-perfect UI from your Figma — or designed from scratch • Full App Store & Google Play submission (I handle the review process) HOW I WORK 1. Free scoping call → fixed milestones & timeline 2. Weekly builds you can test on your own device (TestFlight / Play Internal) 3. Clean, documented, handover-ready code — no lock-in 4. Post-launch support & store-update help STACK iOS: Swift · SwiftUI · UIKit · Objective-C · Xcode · Combine · Core Data · CloudKit Android: Kotlin · Java · Jetpack Compose · Coroutines · Room · Retrofit · Hilt/Dagger Cross-platform: React Native · Flutter · Expo · Dart · TypeScript Backend & services: Firebase · Supabase · Node.js · REST · GraphQL · WebSocket Tooling: Git · CI/CD (Fastlane, GitHub Actions) · App Store Connect · Play Console RESULTS Apps shipped to both stores · MVPs delivered in 4–6 weeks · existing apps rescued and re-launched · long-term partnerships, not disappear-after-delivery freelancing. Tell me about your app idea or the app you need fixed. I'll reply with an honest scope, timeline, and the right approach (native vs cross-platform). I can start this week.
$45 hourly
Nestor P.
- 5.0
- (21 jobs)
Lviv, LVIV OBLAST
Mobile App Development
SwiftUI
Tablet
Kotlin
Firebase
User Authentication
User Profile Creation
QA Engineering
QA Testing
UX & UI Design
iOS Development
Swift
Android
iOS
Smartphone

I specialize in iOS and Android development but also provide end-to-end app development when needed—in partnership with expert UI/UX designers and backend engineers. • Huma (UK healthtech company, $300M funded) – Led iOS development, architected the SDK, and built complex features for remote patient monitoring. • FuboTV (US streaming service with millions of users) – Developed and optimized video playback on iOS, tvOS, and Chromecast for a seamless streaming experience. 📊 Industry Experience: Healthtech, finance, social networking, communication tools, and more—focusing on security, real-time interactions, intuitive UI, and compliance with HIPAA & GDPR standards. 📩 Need expert iOS/Android development or an end-to-end app solution? Let’s discuss how I can help!
$125 hourly
Shane L.
- 4.8
- (14 jobs)
Memphis, TN
Mobile App Development
Embedded C
Firmware Programming
C#
Python
C
Mechanical Design
Product Development
CAD
Hardware Prototyping
Electronic Design
Web Design

I turn concepts into reality. HatchPoint is the research and development company that I founded in 2001. Although a mechanical engineer by training, I have also become an expert in circuit design with an emphasis on low power wireless sensors and instruments. As HatchPoint has evolved I’ve expanded my skills beyond engineering, with experience in fund raising, project management, intellectual property, and FDA regulatory concerns. I am a business development consultant for start ups as well. HatchPoint has begun to grow internal concepts into products. Autonomy Medical (previously Compliant Games) is an mHealth platform started at HatchPoint that helps prevent and treat respiratory diseases in children. While I enjoy the technical aspects of product design, I have also grown to appreciate the business development necessary to bring products successfully to market. Technical Specialties: • Software development including embedded and desktop development (C/C++, Python, Assembly) Web-based applications (Pyramid, TurboGears), database (mySQL, MongoDB), and Linux device drivers • Electronics design (Pulsonix EDA, EagleCAD, KiCad, Mentor PADS) with an emphasis on embedded electronics and sensors using ARM MSP, and AVR microcontrollers. • Mechanical design and CAD (SolidWorks, Pro/E, Fusion 360) • Prototyping using SLA, molding, or vacuum forming as well as manual or CNC machining. • Small batch PCB assembly for prototyping and evaluation including small-pitch surface mount and RF components. Startup Experience: • Developing fundraising business plans and pitches for fundraising. • Raising seed round funds for two startups. • Modeling financials for predicting capital requirements and developing sales models. • Working with consultants to meet FDA 510(k) and IEC 60601 regulatory process.
$40 hourly
Raza A.
- 5.0
- (35 jobs)
Karachi, SINDH
Mobile App Development
API Development
RESTful API
Android App Development
Payment Functionality
Location-Based Service
Angular
Push Notifications
TypeScript
Payment Gateway Integration
API Integration
Flutter
Firebase
Dart
iOS

7+ years building Flutter apps that ship and stay stable. I was the sole engineer at Zing Data, a $2.4M-funded analytics startup. Owned the entire cross-platform codebase (iOS, Android, Web) serving Fortune 1000 clients across 50+ countries for 3.5 years. Here's what I actually do: Performance work most devs skip Hit 60 FPS on screens rendering live data visualizations by moving heavy computations to background isolates. Built the natural language querying layer that lets non-technical users pull insights from 120+ data sources (Snowflake, BigQuery, Postgres) without writing SQL. Architecture that scales without rewrites Designed Zing Data's codebase around Clean Architecture with Riverpod. Zero architectural rewrites over 3.5 years of continuous feature growth. That's not luck, it's planning. Fast delivery without cutting corners Built a reusable component library that cut feature delivery time by 30%. I write code other developers can actually pick up and maintain. 99%+ crash-free rate across every release. Real production complexity Firebase, Supabase, REST, WebSocket, GraphQL. I've integrated them all in production apps. Currently building a bilingual RTL deals platform for the Saudi market and a Web3 social platform with real-time chat and matchmaking. Earlier work includes analytics (Zing Data), EdTech with Arabic RTL support (Abjadiyat, Arrive), fintech (Orokii), and consumer apps (ListAIse). I work async-first from Karachi (UTC+5, 4hr overlap with US East), communicate clearly, and don't ghost mid-project. If your Flutter app needs to be fast, stable, and built by someone who's done this before, send me your requirements.
$41 hourly
Preeti S.
- 5.0
- (57 jobs)
Bareilly, UTTAR PRADESH
Mobile App Development
Illustration
Photo Manipulation
Image Editing
Photo Editing
Product Marketing
Product Design
Mobile App Design
Biology Consultation
Project Analysis
Graphic Design
3D Modeling
Adobe Photoshop
Adobe Illustrator

**Available for both Long-term and short-term projects.** Experience 7+ years - Graphics Designing, 3D Modeling, Animation and Rendering 3D Modeling, Animation & Rendering • Product Images • Lifestyle • Model/Object Creation • Product Video • High Quality Renders I provide all type of Graphic Designing, photo and file editing and manipulation work with very FAST turnaround time. Amazon: • Amazon Product Image Editing & Creation • Amazon Product Upload • Amazon A+ / EBC Content Creation • Photo Manipulation - Adding, removing, replacing object and people • Photo Editing • People/Object Cut-out • Portrait Editing • Wedding/Party Invites • Product Image Editing & Background Removal for eCommerce • Banner, Social Media Image Designing • Jewellery Image Retouching & shining • Brochure, Pamphlet, Flyer Design • Business Card Design • Letterhead Design Technical Designs with drawing • Installation Manuals • User Guides ----------------------------------------------------------------------------------------------------
$40 hourly
Shiv K.
- 5.0
- (9 jobs)
New Delhi, NCT
Mobile App Development
Search Engine Optimization
On-Page SEO
Digital Strategy
Bootstrap
Digital Marketing
PSD to WordPress
WordPress e-Commerce
MySQL
Laravel
PHP
Node.js
React
Ecommerce Website Development
Web Development

I am a full stack developer with 15 + years experienced associated with Approzo Tech Pvt Ltd. We are a one-stop digital agency based in India and offering services worldwide like website design & development, digital marketing, mobile app development, CRM development, business growth strategy, SEO, branding and ecommerce solution etc. We have team of 50+ expert developers and designers who are highly certified in their technologies. Also, delivered around 500+ projects for huge brands and SMEs. We work almost all latest technologies such WordPress, Joomla, OpenCart, Magento, ReactJS, NodeJS, Laravel, PHP, AngularJS, HTML5, Bootstrap, JQery, JavaScript and CSS3 many more. We have maximum clients from Australia, United States, Canada, Switzerland and Singapore. Also, we have a target to growing our services to most of the countries. Based on 100% delivered projects, we have 100% client satisfactions and have a long terms business relationship with our clients. We are highlighting our services below, please have a look and offer a chance to working with us. Our Services: ✅ Brand & Identity Design ✅ Product Design & Strategy ✅ Mobile & Web App Development ✅ Digital Marketing ✅ Hosting Tools and Technologies in which we work: ✅ Adobe XD ✅ Photoshop ✅ Illustrator ✅ Figma ✅ Git Repository ✅ AngularJs ✅ ReactJS ✅ NodeJs ✅ VueJs ✅ Web API`s ✅ HTML5/Bootstrap/CSS3 ✅ WordPress ✅ Adobe Experience Manager ✅ Magento 2 ✅ Opencart ✅ Codeigniter ✅ Laravel ✅ Joomla ✅ Many more. Need more reasons to hire us? ✅ Experienced Team ✅ Quality Is Our Priority ✅ Satisfaction Guaranteed ✅ Excellent Support Regards!
$60 hourly
Vinicius N.
- 5.0
- (18 jobs)
Conselheiro Lafaiete, STATE OF MINAS GERAIS
Mobile App Development
In-App Purchases
Hybrid App Development
iOS
Firebase
CakePHP
Android
Flutter
MySQL Programming
Dart
API
HTML
Java
PHP
CSS

I’m Vinicius Assis Neves, a Senior Mobile and Web Developer from Brazil with extensive experience in cross-platform development, specializing in Flutter. Over the past several years, Flutter has been my core technology for building efficient, high-quality mobile applications. In addition to Flutter, I have strong experience in web development, Android development, and basic knowledge of iOS development. I am proud to be an Upwork Top Rated Freelancer, recognized for my outstanding performance and consistent success across both short- and long-term projects. My professional journey began as a mobile developer at Lemon Inteligência, where I started working with Flutter. Thorought, I also took on a part-time role on Upwork for an Australian company. Eventually, I transitioned to working mostly on Upwork, where I’ve since honed my skills in system architecture, mobile and web development, web scraping, security, and best coding practices. My skill set includes: • Mobile App Development (Flutter, Android) • Backend Development (Node.js, PHP, AWS) • Web Development (CakePHP, WordPress) • Database Management (MySQL, PostgreSQL) • Cloud Architecture (AWS services, including Lambda, API Gateway, and S3) Although Flutter development remains my primary focus, I am always eager to learn new technologies and continuously expand my skill set. I’ve had the privilege of working on a wide variety of projects, from mobile apps to complex web systems, and I’m confident that we can achieve great results together. Feel free to reach out anytime to discuss your project or ask questions about my experience. I’m excited to collaborate with you!
$35 hourly
Tony i.
- 4.7
- (43 jobs)
Beirut, BA
Mobile App Development
CSS
HTML
NestJS Development
Redux
Figma
Tailwind CSS
Next.js
Node.js
React Native
Firebase
React

✨ I Can Help Build Your AI SaaS ✨ ✨ stop wasting money on unscalable code ✨ Top Rated Full Stack Developer in the Top 8% Talent on Upwork ✨ Ensuring top-tier quality in deliverables and maintaining clear communication throughout the entire development process. Need a versatile Full Stack Developer with expertise in React JS, Next JS, React Native, Expo Go, Node.js, and NestJS? You're in the right place. 🖐 I'm a Senior Full Stack Developer with 5+ years of experience in creating pixel-perfect responsive web applications and mobile applications. My skills: ✅ React JS development ✅ Next JS development ✅ React Native development ✅ Expo Go development ✅ Node.js development ✅ NestJS development ✅ Redux | Flux ✅ TypeScript | JavaScript ✅ HTML 5 | CSS 3 | SASS | SCSS | Tailwindcss ✅ Tailwind CSS | Bootstrap 5 ✅ Pixel perfect design ✅ PSD to HTML | Sketch to HTML | Figma to HTML ✅ GIT/Gitlab/BitBucket ✅ SCRUM ✅ Quality assurance Excited to collaborate on projects, discuss ideas, and explore ways to ensure your success. Feel free to reach out with any questions.
$45 hourly
Abdelbaki B.
- 5.0
- (5 jobs)
Oran, ORAN
Mobile App Development
Network Engineering
Cisco IOS
Software Development
Cisco Certified Network Associate
Computer Network
Web Development
SQL
Firebase
User Profile Creation
User Authentication
Android App Development
Flutter
Dart
Python

Hi, I'm AbdelBaki, and I'm a software engineer and a Cisco Certified Network Associate... I work with Flutter, C++, and Python. I've worked on many projects for fun and some others to help the community. I've created two packages for flutter and a social media app with end-to-end messaging. I developed a management and tracking software for customs warehouses company with C++ and Qt. And I am currently working on Mercury, a software for monitoring and managing Cisco devices where I'm using python for the backend and flutter for the frontend. I spend most of my time working with/or learning new technologies and doing networking labs, and trying different configurations.
$40 hourly
Kiran M.
- 4.9
- (55 jobs)
Surat, GUJARAT
Mobile App Development
Microservice
Deployment Automation
WebRTC
MEVN Stack
MERN Stack
Electron
Firebase
React Native
Desktop Application
Laravel
ExpressJS
Vue.js
Socket.io
React
Chat & Messaging Software
Web Application
Node.js

Full Stack developer with 10+ years of building Web, Mobile and Desktop applications and solutions that are fast, maintainable, and built to scale. I've delivered 50+ projects across diverse industries like FinTech, Logistics, Grooming & Wellness, Communication & Business administration, from complex web platforms to cross-platform mobile apps and I bring both technical depth and clear communication to every engagement. My core stack spans in Javascript and PHP on backend where i have mastered both Microservices and Monolith architectures with express.js, feathers.js and Websockets. Vue.js, React.js, and React Native on the front end. For mobile, I work with Flutter, React Native, and native Android/iOS. I'm also experienced with Electron.js for desktop, and comfortable across databases MySQL, MongoDB, and graph databases like Neo4j and OrientDB. I take CI/CD seriously. my workflow integrates Git, Bitbucket, Jenkins, and Travis CI, along with testing frameworks like Karma, Mocha, and Tape. Code quality and clean architecture aren't afterthoughts; they're how I work by default. I'm an active open-source contributor and I keep up with emerging technologies so my clients always get modern, future-proof solutions. If you're looking for a developer who writes clean code, communicates proactively, and gets things done right, let's talk.
$70 hourly
Syed Raza H.
- 4.9
- (23 jobs)
Karachi East, KARACHI
Mobile App Development
API Development
API Integration
iOS Development
Android App Development
Firebase
Dart
Hybrid App Development
FlutterFlow
Flutter
iOS
Android

✅ 𝟐𝟎 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 𝐣𝐨𝐛𝐬 = 𝟏𝟖𝟎,𝟎𝟎𝟎$+ 𝐞𝐚𝐫𝐧𝐢𝐧𝐠𝐬 𝐜𝐨𝐦𝐩𝐥𝐞𝐭𝐞𝐝 👨‍💻 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐝 & 𝐈𝐦𝐩𝐫𝐨𝐯𝐞𝐝 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐜𝐡𝐮𝐫𝐧 𝐫𝐚𝐭𝐢𝐨 𝐭𝐨 𝟏𝟎𝟎𝐤+ 𝐝𝐨𝐰𝐧𝐥𝐨𝐚𝐝𝐬 📲 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐢𝐧 𝐡𝐢𝐠𝐡 𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝑾𝒉𝒚 𝒎𝒆? ★ Consider me a 𝐠𝐞𝐧𝐢𝐞 in 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 & 𝐍𝐨𝐝𝐞𝐉𝐒 mobile application, your wish will be my command but not every bad wish will be granted. ★ Work with an experienced full-stack 𝐌𝐨𝐛𝐢𝐥𝐞 developer that doesn't compromise the code and business needs. ★ I won't let you struggle with your needs. 𝐄𝐯𝐞𝐫𝐲𝐭𝐡𝐢𝐧𝐠 𝐢𝐬 𝐝𝐨𝐚𝐛𝐥𝐞 in 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 Mobile application and I have that vision to do it for your business. ★ Have enough experience seeing startups 𝐬𝐮𝐜𝐜𝐞𝐞𝐝 𝐚𝐧𝐝 𝐟𝐚𝐢𝐥 and I don't want you to fail due to any of developers fault. ★ I travel in 🏆 𝐰𝐢𝐧𝐧𝐞𝐫𝐬 bandwagon so its up to you whether you want to start this journey with me. 𝑨𝒃𝒐𝒖𝒕 𝒎𝒆? ● 𝐍𝐞𝐫𝐝 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 & 𝐍𝐨𝐝𝐞𝐉𝐒 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 wood pecking every details of the code. ● Absolute genius in writing high intensive algorithms to drive your business needs and solve your problems. I developed the 𝐬𝐡𝐨𝐫𝐭𝐞𝐬𝐭 𝐫𝐞𝐯𝐞𝐧𝐮𝐞 𝐠𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐨𝐧 𝐚𝐥𝐠𝐨𝐫𝐢𝐭𝐡𝐦 to drive customer growth. ● 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐫𝐚𝐢𝐬𝐞𝐝 𝟐𝟎 𝐦𝐢𝐥𝐥𝐢𝐨𝐧 𝐮𝐬𝐞𝐫𝐬 in 3 years time span. ● Keen eye for detail in developing and transforming design to code. Expertise in Figma, Miro, Sketch, xD. ● Excellent in 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐢𝐧𝐠 & 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐧𝐠 custom backend(REST or SOAP API's), Supabase, Firebase or AWS Amplify with AWS AppSync. 𝑻𝒆𝒔𝒕𝒊𝒎𝒐𝒏𝒊𝒂𝒍𝒔 1. Queue online Flutter Application - 𝟓.𝟎 ⭐ "𝙄 𝙧𝙚𝙖𝙡𝙡𝙮 𝙡𝙞𝙠𝙚 𝙬𝙤𝙧𝙠𝙞𝙣𝙜 𝙬𝙞𝙩𝙝 𝙎𝙮𝙚𝙙. 𝘾𝙖𝙣 𝙩𝙖𝙠𝙚 𝙛𝙪𝙡𝙡 𝙤𝙬𝙣𝙚𝙧𝙨𝙝𝙞𝙥 𝙖𝙣𝙙 𝙙𝙧𝙞𝙫𝙚 𝙙𝙚𝙫𝙚𝙡𝙤𝙥𝙢𝙚𝙣𝙩. 𝘼𝙡𝙨𝙤 𝙜𝙤𝙤𝙙 𝙘𝙤𝙢𝙢𝙪𝙣𝙞𝙘𝙖𝙩𝙞𝙤𝙣 𝙖𝙣𝙙 𝙬𝙖𝙣𝙣𝙖 𝙡𝙚𝙖𝙧𝙣." 2. Senior Flutter Developer - Totem - 𝟓.𝟎 ⭐ "𝙍𝙖𝙯𝙖 𝙬𝙖𝙨 𝙖𝙣 𝙞𝙣𝙩𝙚𝙜𝙧𝙖𝙡 𝙥𝙖𝙧𝙩 𝙤𝙛 𝙤𝙪𝙧 𝙩𝙚𝙖𝙢, 𝙖 𝙜𝙧𝙚𝙖𝙩 𝙘𝙤𝙡𝙡𝙖𝙗𝙤𝙧𝙖𝙩𝙤𝙧 𝙖𝙣𝙙 𝙖𝙣 𝙚𝙭𝙥𝙚𝙧𝙞𝙚𝙣𝙘𝙚𝙙 𝙙𝙚𝙫. 𝙒𝙤𝙪𝙡𝙙 𝙧𝙚𝙘𝙤𝙢𝙢𝙚𝙣𝙙 𝙖𝙣𝙮 𝙩𝙞𝙢𝙚." 3. Flutter Food Distribution Application - 𝟓.𝟎 ⭐ "𝙂𝙧𝙚𝙖𝙩 𝙟𝙤𝙗 𝙫𝙚𝙧𝙮 𝙨𝙖𝙩𝙞𝙨𝙛𝙮𝙞𝙣𝙜 𝙬𝙞𝙩𝙝 𝙝𝙞𝙨 𝙬𝙤𝙧𝙠, 𝙄 𝙬𝙤𝙪𝙡𝙙 𝙙𝙚𝙛𝙞𝙣𝙞𝙩𝙚𝙡𝙮 𝙧𝙚𝙘𝙤𝙢𝙢𝙚𝙣𝙙 𝙩𝙤 𝙝𝙞𝙧𝙚 𝙝𝙞𝙢 𝙖𝙜𝙖𝙞𝙣" 4. Getscope Flutter Application - 𝟓.𝟎 ⭐ "𝘼𝙬𝙚𝙨𝙤𝙢𝙚 𝙚𝙭𝙥𝙚𝙧𝙞𝙚𝙣𝙘𝙚. 𝙒𝙤𝙪𝙡𝙙 𝙙𝙚𝙛𝙞𝙣𝙞𝙩𝙚𝙡𝙮 𝙧𝙚𝙘𝙤𝙢𝙢𝙚𝙣𝙙." 𝑺𝒐𝒖𝒏𝒅𝒔 𝒍𝒊𝒌𝒆 𝒂 𝒇𝒊𝒕? Next steps: 📩 Invite me or send a message and I will be at your service. 💬 Just write me a note so that I am at your disposal to discuss further requirements. Just do the initial steps and leave the rest to me.
$50 hourly
Oleksandr N.
- 5.0
- (14 jobs)
Chernihiv, CHERNIHIV OBLAST
Mobile App Development
User Profile Creation
In-App Purchases
API Integration
Swift
iOS Development
Objective-C
iOS SDK
Mac OS App Development
iPad App Development
Apple Xcode
Android App Development
iOS

I'm a senior mobile developer with 9+ years of experience building production iOS and Android apps — from startup MVPs to large-scale fintech and e-commerce products used by hundreds of thousands of users. ✅ Top Rated ✅ 100% Job Success ✅ Shipping apps end-to-end: from idea → App Store & Google Play I've worked as both a freelancer and an in-house engineer, and I currently ship and maintain my own apps on the App Store and Google Play. I focus on clean architecture, maintainability, and native platform conventions — code that stays healthy as the product grows. What I do well: Building iOS and Android apps from scratch and taking them to the stores Modernizing legacy codebases (UIKit → SwiftUI, Obj-C → Swift, hybrid → native) Subscriptions, paywalls, and in-app purchases (StoreKit 2, RevenueCat) Analytics, attribution, and growth instrumentation (Firebase, Apple Search Ads, RevenueCat) App Store Optimization, localization, and conversion-rate work CI/CD setup and release automation (Fastlane, Match, TestFlight) iOS Swift, Objective-C, SwiftUI, UIKit, Combine, Swift Concurrency (async/await), Xcode, Core Data, Realm, MapKit, Core Location, AVFoundation, Core Image, Core Animation, WidgetKit, StoreKit 2, APNs, Push Notifications Android Kotlin, Jetpack Compose, Material 3, Android Studio Cross-cutting REST, GraphQL, Firebase, RevenueCat, Git, Fastlane, TestFlight, CI/CD, CocoaPods, Swift Package Manager Programming is also my hobby — I run my own indie apps and handle everything from development to marketing and customer support, which gives me a product-minded perspective most contractors don't have.
$40 hourly
Jonathan V.
- 4.9
- (31 jobs)
Quito, PICHINCHA
Mobile App Development
Software Architecture
Software Development
Insurance Software
Conversational AI
Amazon Web Services
Cloud Architecture
Front-End Development
Rust
TypeScript
React Native
React
Web Design
JavaScript
Python

I have a passion for technology and its potential to impact society positively. That's why I help to empower individuals and organizations in building innovative tech solutions After a successful 5-year career in building and launching software products, I took the leap. I co-founded Allient, an exceptional agency comprised of highly talented tech professionals who are experts in various areas. Our team at Allient possesses a diverse range of skills and specializes in the following: ✅ Frontend: Typescript, ReactJS, Nextjs ✅ Backend: Supabase, Python, Fastapi, PostgreSQL, Redis ✅ Mobile Apps: Typescript, Expo, React Native ✅ Cloud: AWS Cloud services ✅ DevOps: Docker, Docker compose, Github, Github actions, Slack, Jira ✅ AI: NLP, Langchain, Rasa, HuggingFace, OpenAI, Qdrant We are developing software solutions targeted at the insurance, transportation, and agricultural industries. Together, we can amplify the potential of businesses through the use of AI-driven technology. At Allient, we understand the significance of staying ahead in today's competitive landscape, and we recognize the urgency for new businesses to validate their value propositions swiftly in the market. With this in mind, we are committed to assisting our clients in identifying the optimal alternatives that expedite their digital transformation goals. Our mission is to harness the boundless potential of technology to unlock the inherent capabilities of individuals and businesses. By leveraging cutting-edge, innovative, and efficient solutions, we empower our clients to achieve their goals and realize their full potential. Please feel free to reach out to us with any questions or to provide further information about your project. We're excited to learn more and determine if we are the right partner for your journey.
$45 hourly
Muhammad K.
- 5.0
- (23 jobs)
Nowshehra, PUNJAB
Mobile App Development
Back-End Development
Flutter Stack
SaaS Development
NodeJS Framework
MERN Stack
No-Code Development
Bubble.io
AI App Development
AI Chatbot
Full-Stack Development
LLM Prompt Engineering
ChatGPT
Generative AI

Your AI system works. Now it needs to hold up in production. We help teams that have hit the internal ceiling of what they can build themselves. The MVP is live, users are growing, but things keep breaking. Workflow failures, API errors, agent instability, a patchwork of tools stitched together. Sound familiar? What we do: Take AI systems from functional prototype to production-grade Debug and resolve workflow failures, API errors, and agent instability Refactor existing codebases rather than proposing ground-up rewrites Build reliable LLM integrations (OpenAI, Claude, Gemini), RAG pipelines, and agentic workflows Optimize inference costs and manage API budgets so your bill doesn't keep climbing Integrate across the full stack: CRM, Voice AI, ticketing, chat, vector DBs How we work: We ship. Async communication, fast turnaround, no hand-holding required We document what we build so your team can maintain and extend it We see a problem, we fix it. You don't have to manage us Weekly check-ins, full transparency, no surprises Our stack: React, Node.js, Python, Next.js, Firebase, GCP, AWS, n8n, Zapier, Make, Retell, Vapi, Pinecone, Weaviate, Supabase, Slack integrations, REST/GraphQL APIs Good fit if: You've built something that works but it's becoming a mess at scale You need senior engineers, not juniors learning on your dime You want a cohesive system, not more patchwork You care about outcomes (fewer failures, lower costs, stable agents), not hours logged Not a fit if: You need a basic website or landing page You want someone to sit in meetings all day You're looking for the cheapest rate
$40 hourly
Daniel M.
- 5.0
- (7 jobs)
Valera, TRUJILLO
Mobile App Development
React Native
Python
ASP.NET
Django
Drupal
JavaScript
React
AngularJS

I have been developing web and mobile apps for the past 7 years and have expertise in serverless architecture, full stack development, IoT projects My skills: 1. Web Development - Front-end React(Redux,Redux-Saga,RxJS), Vue, Angular 4/5/6, AngularJS - Back-end Python/Django/Flask, PHP/Laravel/CodeIgniter, Node.js, ASP.NET MySQL, PostgreSQL, MongoDB, Redis, DynamoDB - Cloud Services Serverless Architecture, AWS, Firebase, Azure, Google Cloud, DigitalOcean 2. Mobile Development - Native Android and iOS - React Native, Unity I am able to offer competitive prices and add value to the projects with my experience . I can dedicate more than 40hrs/week to your project and working hours are flexible.
$35 hourly
Artem S.
- 5.0
- (15 jobs)
Dnipro, DNIPROPETROVSK OBLAST
Mobile App Development
Image Processing
iPad App Development
Apple Xcode
RESTful Architecture
User Authentication
Location-Based Service
API Integration
In-App Purchases
iOS
iOS Development
Firebase
Objective-C
Swift
SwiftUI

𝘼𝙫𝙖𝙞𝙡𝙖𝙗𝙡𝙚 𝙖𝙣𝙙 𝙧𝙚𝙖𝙙𝙮 𝙩𝙤 𝙨𝙩𝙖𝙧𝙩 𝐢𝐎𝐒 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 with 𝟏𝟐+ 𝐲𝐞𝐚𝐫𝐬 of professional experience. Most time I was working in the professional software company on a wide range of mobile apps: real estate, messaging, blogging, geo-location, photo scanning and etc. I am focused on delivering clean, readable, solid and self-explaining Swift code. Implementing pixel-perfect design, from mockups, according to the Apple Human Interface Guidelines, with full attention to details. Here are my core skills and experiences: • iOS frameworks: 𝗦𝘄𝗶𝗳𝘁𝗨𝗜, UIKit, CoreData, Compose, AVFoundation, Vision, MapKit, CoreLocation, StoreKit and etc • Client-server applications (JSON, REST, WebSocket, WebRTC, Firebase) • Push notifications and in-app purchases: 𝐑𝐞𝐯𝐞𝐧𝐮𝐞𝐂𝐚𝐭, Apphud, Stripe, OneSignal • Worked with Meta(Facebook), OpenAI, Google API and other • Location and integration Maps (Google maps, Apple maps) • Integrate: Flurry, GoogleAnalytics, AdMob and etc • Instruments: Xcode, Fastlane, Postman, Proxyman, Github, GitBucket, Trello, Jira • Backend experience: 𝐅𝐢𝐫𝐞𝐛𝐚𝐬𝐞(Firestore, Storage, Messaging, Config, A/B), AWS, Swift(Vapor), Python(FastAPI), Matrix(Synapse), Docker, PostgreSQL, Redis.
$125 hourly
Timothy Y.
- 5.0
- (7 jobs)
Dunedin, OTAGO
Mobile App Development
Flutter
AR & VR
.NET Framework
Web3
Artificial Intelligence
Swift
API Development
Python
Multiplayer
Game Development
C++
C#
Unreal Engine
Unity

I’m a Lead Game Developer with 18+ years of experience building multiplayer games, live-service systems, and scalable game platforms across PC and mobile. I specialize in Unity (C#) and Unreal Engine (C++), with deep expertise in: • Multiplayer architecture (P2P, client-server, orchestration) • Live operations and backend-integrated game systems • Performance optimisation (CPU/GPU) • Systems design and game economy architecture • Web3 and player-driven digital economies I’ve led distributed engineering teams, shipped and operated live products, and owned technical direction from prototype through launch and post-release evolution. I help teams design and ship scalable multiplayer systems, live-service architecture, and technically ambitious game products without compromising delivery or performance. For larger engagements, I can leverage a trusted network of senior engineers through my studio to scale delivery when required.
$200 hourly
Bill V.
- 5.0
- (84 jobs)
Wayne, NJ
Mobile App Development
PostgreSQL Programming
JetPack
Kotlin
iPad App Development
AR & VR
Cocoa API
Apple Xcode
Unity
Firebase Cloud Firestore
iOS Development
Swift
Objective-C
Firebase
C#

I help startup founders and established businesses launch high-quality iOS, Android, Web, and cross-platform apps fast. As a senior mobile developer, I’ve shipped dozens of apps using SwiftUI, React Native, React Web, Kotlin, Unity, Firebase, AWS, and Azure, including an AR app for NASA’s Visitor Center at Goddard. Whether you’re building an MVP, adding features, or integrating with cloud services, I bring solo execution and clean delivery. No bloated teams. No hand-holding required. Recent and notable work: • NASA: Unity-based AR app for iOS and Android • iOS startups: Social and animation-sharing apps • AI integrations: OpenAI, Hugging Face, RAG, and API workflows • React Web apps with backend integrations • AR/VR product visualization tools • Firebase Functions and Azure cloud apps • Published apps on App Store and Google Play Clients hire me for: • Full app builds from scratch • Debugging and scaling existing codebases • Fast turnaround on scoped deliverables U.S.-based | Rutgers CS graduate (4.0 GPA) | Available for hourly or fixed-scope work
$100 hourly
Lucas W.
- 5.0
- (15 jobs)
Vancouver, WA
Mobile App Development
Retail Merchandising
In-App Purchases
Firebase Cloud Firestore
React Native
Firebase
Database Design
Node.js
React
Progressive Web App
SQL Programming
Enterprise Resource Planning
API Development
JavaScript

Working with clients to solve your problems is our passion! Our team is the best that UpWork has to offer. An affordable option with the warranty, references, skills and credentials to back it up. We have multiple 5 ⭐ apps on the App Store and Play Store under our belt, yours could be next! Years of experience building Web-based inventory software for phone, tablet and desktop web-applications and mobile applications give us the technical skills to solve your problems. Further years designing, refining and iterating WITH CLIENTS gives us the social and design skills to see your project to completion. Clients: Mangamo, Nava & Co, Northwestern University, Head Start, University of Chicago Experience - 10+ years of experience - Team of Experienced Full Stack Engineers with Computer Science degrees - Security Experts from start to finish - Bug-fixing warranty for 3 months always included - US Based native English speaking design/engineering team - Demonstrated history of building quality web and mobile applications. - Custom Business/Organization Process Experts Strong Skills - Javascript - React - React Native - HTML/CSS - Node.js APIs and Servers - SQL - Google Cloud / AWS / Azure - PHP - Web Design and implementation Our Team includes full stack developers, UI/UX designers, cloud engineers, automation experts, graphic designers, backend engineers, marketing specialists and other associates we can contract with for specialized work.
$40 hourly
Sujit P.
- 4.8
- (60 jobs)
Ahmedabad, GUJARAT
Mobile App Development
Sales
React Native
HTML
HRsoft
Android App Development
Flutter
Odoo
Odoo Development
Point of Sale & Payment Systems
Odoo Administration
Manufacturing & Storage
Accounting

With over 13 years of comprehensive expertise in Odoo software development, deployment, and bespoke customization, I am a seasoned software engineer dedicated to delivering innovative ERP solutions that resonate with the unique operational contours of each client. My extensive portfolio spans more than 85 diverse industries—including manufacturing, retail, real estate, hospitality, and automotive—underscoring my adaptability and mastery across various verticals. My approach is founded on unwavering integrity and strategic foresight; I eschew temporary patches in favor of robust, enduring solutions that ensure seamless scalability and future migrations. I specialize in optimizing Odoo’s full potential—ranging from website design, e-commerce platforms, and CRM systems to customized modules tailored to specific business needs. Having orchestrated the implementation of Point of Sale systems in the hospitality and retail sectors, I excel in POS modifications, inventory management, sales, purchasing, accounting, and manufacturing processes. My technical acumen is complemented by a keen attention to detail, ensuring that every configuration aligns with client requirements without jeopardizing database integrity or future growth. I have successfully served clients across various sectors such as manufacturing, retail, logistics, healthcare, and services, providing them with scalable, reliable, and innovative ERP solutions. My approach is customer-centric, detail-oriented, and focused on delivering results that enhance productivity and operational excellence. Let’s collaborate to unlock the full potential of Odoo for your business. Whether you need a new implementation, custom module development, or strategic ERP consultation—I am here to help you succeed.
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