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Poland
$30/hr
100%
Job Success
$100K+ earned
Available now
Offers consultations
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Mobile Flutter Developer with DevOps expertise — building cross-platform iOS & Android apps and owning the full delivery pipeline: AWS, Kubernetes, Ansible, Terraform, CI/CD.
10+ years in software engineering. I deliver production-ready Flutter apps together with the infrastructure that builds, deploys, and runs them.
Flutter Development:
Flutter & Dart — performance optimization, clean architecture, responsive UI/UX
State management — BLoC, Provider, MobX, Riverpod
Animations & graphics — custom animations, CustomPainter, Rive/Lottie, shaders
Maps & geolocation — Google Maps, Mapbox, real-time tracking
Native integrations — platform channels, C++ libraries, real-time audio processing
App Store & Google Play deployment, release management
DevOps & Cloud Infrastructure:
Infrastructure as Code — Terraform, Ansible; Kubernetes orchestration with Helm
CI/CD — automated builds, testing, and deployments (GitHub Actions, Jenkins, GitLab CI, Fastlane, Docker), including mobile release pipelines to App Store and Google Play
Monitoring & observability — Prometheus, Grafana
Cloud platforms — AWS, Google Cloud (GCP), Hetzner; Linux server administration
Firebase & Supabase — auth, real-time database, cloud functions, hosting
Backend Development:
Node.js, Python, Java, Dart backends
API design — REST, GraphQL, gRPC, WebSockets
Databases — PostgreSQL, MySQL, MongoDB, Redis, SQLite
AI & LLM:
AI/LLM integrations in production apps — OpenAI, Anthropic (Claude), Gemini APIs
AI-assisted development workflow — Claude Code and OpenAI Codex
Experience: multiple production apps delivered end-to-end as a solo developer — UI, backend, cloud infrastructure, and deployment automation. Comfortable owning a product fully or working inside an experienced team.
I care about code quality, long-term maintainability, and delivering real value — not just completing tasks. If you need someone who understands mobile development, backend, and the infrastructure that connects them into a working product — I'd be glad to help.
= = = Career Highlights = = =
Oct 2024 – Present — Senior Flutter & DevOps Engineer
Building production Flutter apps end-to-end with cloud infrastructure and deployment automation: AI/LLM-powered features, real-time systems, infrastructure as code. Working independently, owning products from UI to deployment.
Stack: Flutter/Dart, Python, AWS & Google Cloud, Kubernetes, Terraform, Ansible, Docker, Firebase, Supabase, PostgreSQL, MySQL, Redis, MongoDB
Dec 2018 – Oct 2024 — Senior Flutter Developer
Six+ years of Flutter in production since its early releases: multiple apps shipped to App Store and Google Play, real-time and data-driven architectures, solo ownership from UI to backend.
Stack: Flutter/Dart, Supabase, Google Cloud, Firebase, PostgreSQL, SQLite, Linux
2015 – 2018 — Full-Stack JavaScript Developer
Web applications and data visualization for production use.
Stack: JavaScript (React, D3), Node.js, Python/Django, MongoDB
2010 – 2013 — Java Developer
Enterprise web applications. Earned Oracle Certified Professional, Java Programmer.
Stack: Java, GWT, Oracle DB
2006 – 2008 — Web Developer
First commercial projects; Linux as a daily driver since then.
Stack: PHP, JavaScript, MySQL, Linux
= = = Technologies = = =
Flutter • Dart • BLoC • Provider • Riverpod • MobX • CustomPainter • Rive • Lottie • Google Maps • Mapbox • Push Notifications • Firebase Cloud Messaging • In-App Purchases • Hive • CI/CD pipeline • GitHub Actions • Jenkins • GitLab CI • Fastlane • Docker • Kubernetes • Helm • Terraform • CloudFormation • Ansible • Prometheus • Grafana • Bash scripting • AWS • EC2 • S3 • EKS • Lambda • Google Cloud • GCP • Firebase • Supabase • Linux • Node.js • Python • Django • PostgreSQL • MySQL • MongoDB • Redis • REST API • GraphQL • gRPC • WebSockets • LLM integration • RAG • AI chatbot • OpenAI API • Anthropic API • Claude API • Gemini API • Claude Code • OpenAI Codex • Stripe • App Store • Google Play
$20/hr
100%
Job Success
$10K+ earned
Start of list.
End of list.
If your app idea is stuck on paper or half-built and broken I can take it live.
I'm Ayushi, a Senior Mobile App Developer with 8+ years building iOS, Android, and Flutter apps that actually get shipped to the App Store, on Google Play, and in the hands of real users. My focus is always the same: enterprise-quality code, reliable delivery, and communication that doesn't leave you guessing.
50+ apps delivered across fitness, edtech, SaaS, sports, healthcare, and e-commerce.
🔧 What I build:
- iOS apps: Swift, SwiftUI (native, clean, App Store ready)
- Android apps: Kotlin, Jetpack Compose
- Cross-platform: Flutter/Dart for iOS + Android from one codebase
- MVPs for startups that need to move fast and look polished
- Full-feature apps with subscriptions, payments, user roles, and API integrations
📱 A few notable apps I’ve built and shipped:
1. Reveal Club: fitness + nutrition app with HealthKit, Stripe subscriptions, calorie tracking, meal plans (iOS & Android, live on both stores)
2. Sports Life Success: 4-role club management app with memberships, game certificates, coach/parent/player flows (iOS & Android, live)
3. TutumNet: mental health self-care app with goal tracking and support network (iOS, live)
4. iPromise: goal accountability app with SMS invites, guest flow and category management (Flutter, Android, live)
5. Thrive: tutor attendance and academic tracking app with time cards and progress reports (iOS, live)
6. Smart Routing: GPS navigation app for courier drivers handling 1000+ waypoints via Mapbox with CarPlay integration
⚙️ Tech stack:
- Swift · SwiftUI · Kotlin · Dart · Flutter
- Firebase · REST APIs · Alamofire · Retrofit · Stripe · RevenueCat
- HealthKit · Mapbox · Push Notifications · Zendesk
- MVVM · Clean Architecture · CI/CD · Git · Xcode · Android Studio
🏭 Industries I know well:
- Fitness & wellness · Mental health · Sports management · EdTech
- SaaS platforms · E-commerce · Logistics · On-demand services
✅ Why clients keep working with me:
- I don't just write code I think about the product. I ask the right questions before building.
- Clean, maintainable code that your next developer can actually read.
- I use AI tools (ChatGPT, Cursor) to work faster but I review, test and own every line.
- I work in organised processes Slack/Teams standups, Jira/Asana tracking, regular screen shares.
- Realistic timelines. No ghost-acts. Direct communication when blockers come up.
If you're a startup that needs a first version shipped fast, a business scaling an existing app, or a solo founder with a great idea send me a message and let's talk about your project.
📩 Message me with your app idea or job description.
$25/hr
100%
Job Success
$100K+ earned
Available now
Offers consultations
Start of list.
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I help founders ship faster. AI-powered mobile apps, MVPs, and SaaS platforms — built right, delivered on time, and ready to scale from day one.
Over the last 10 years, I've shipped 150+ products across mobile (Flutter, native iOS & Android), web (Next.js, React), and backend (Node.js, Firebase, AWS). My clients include early-stage startups launching their first MVP and established businesses scaling to hundreds of thousands of users.
Where I add the most value:
— MVP development & rapid product launches: I help founders go from idea to a fully functional, market-ready MVP in weeks — not months. Lean architecture, fast iterations, and real user feedback from day one.
— AI-powered mobile applications: intelligent automation, recommendation engines, conversational AI, and GPT/Gemini integrations built natively into your product
— Full-stack SaaS platforms: end-to-end architecture from database design and API development to admin dashboards, payment systems, and deployment
— Complex multi-sided platforms: marketplaces, on-demand delivery systems, and subscription-based apps with real-time features, notifications, and role-based access
I've also been a founder myself (running a development firm since 2021), so I understand product timelines, budget trade-offs, and what it takes to ship something that actually works in the real world — not just a demo.
My process is milestone-driven: we define scope together, I share progress builds at every stage, and nothing ships without thorough testing. You'll always know where things stand.
If you're building an MVP, scaling an existing product, or need an AI-powered app that works at scale — send me a message with your project details, and I'll share an honest assessment and a clear roadmap.
Associated with
Aprodence Technologies LLP - Full-Stack Development, Design & Digital Marketing Agency
$80K+
earned
$20/hr
100%
Job Success
$30K+ earned
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I'm a Mobile and Web app developer with over 9+ years of professional experience. If you are looking for someone to respond you fast, take care of your product, turn your dream idea into reality you're viewing right candidate. I focus on deliver the best quality apps to my clients with following skills:
Mobile App: Flutter | React Native
Web App: ReactJS | Angular | HTML, CSS, JS
Backend: NodeJS | MySQL
What I can do for you:
✅ Build an app from idea to reality (MVP).
✅ Build an app from scratch by understand app requirement, design and flow.
✅ Extend already existing apps - bug fixes, updates, add new features.
✅ Perform code review and improvement.
✅ Deploy app on App Store and Play Store with their guidelines and rules.
✅ Integrate tools for user engagement & crash report ex: Amplitude, Firebase analytics, Sentry, Instabug, App Center etc.
✅ Maintain app source code history with Git.
✅ Build automation pipeline for CI/CD.
𝗠𝗮𝗶𝗻𝘁𝗲𝗻𝗮𝗻𝗰𝗲 & 𝗟𝗼𝗻𝗴-𝗧𝗲𝗿𝗺 𝗦𝘂𝗽𝗽𝗼𝗿𝘁
I provide free post-delivery support for 8 weeks, followed by flexible maintenance plans based on your product needs, usage scale, and future roadmap, always discussed transparently.
----------------------------------------------
🚀 If you’re looking for someone who understands your product, owns outcomes, communicates clearly, and thinks long-term, let’s connect and build something solid.
❗❗ Check out my portfolio! ❗❗
Jatin S.
has worked
.
$24/hr
100%
Job Success
Available now
Offers consultations
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I build 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲, 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻‑𝗿𝗲𝗮𝗱𝘆 𝗺𝗼𝗯𝗶𝗹𝗲 𝗮𝗽𝗽𝘀 for iOS and Android. With 8+ years of experience and over 100 shipped apps, I focus on 𝗰𝗹𝗲𝗮𝗻 𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴, 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝘁 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆, and 𝗽𝗿𝗲𝗱𝗶𝗰𝘁𝗮𝗯𝗹𝗲 𝗿𝗲𝘀𝘂𝗹𝘁𝘀.
I handle the full development cycle: 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 → 𝗰𝗼𝗱𝗶𝗻𝗴 → 𝘁𝗲𝘀𝘁𝗶𝗻𝗴 → 𝗱𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁 → 𝗺𝗮𝗶𝗻𝘁𝗲𝗻𝗮𝗻𝗰𝗲.
No guesswork, no fluff — just solid execution.
𝗶𝗢𝗦: Swift, SwiftUI, Objective‑C
𝗔𝗻𝗱𝗿𝗼𝗶𝗱: Kotlin, Java, Jetpack
𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲:
• Firebase & real‑time data sync
• Offline‑first architectures
• REST APIs & complex integrations
• Payment systems & in‑app purchases
• Mapping, GPS & location‑based features
• Bluetooth & device‑level integrations
• Media‑heavy apps, rendering, editing, streaming
• Custom UI components & performance‑optimized UI
• App Store & Play Store deployment
𝗦𝗲𝗹𝗲𝗰𝘁𝗲𝗱 𝗪𝗼𝗿𝗸:
• Multiple apps with more than 100k downloads each
• High‑performance wallpaper & media apps
• Fintech apps with secure transaction flows
• Real‑time chat and streaming applications
• Utility and productivity apps with advanced device integration
Why clients choose me:
• Clean, scalable architecture (not quick fixes)
• Strong focus on performance & large data handling
• Direct communication (no outsourcing)
• Reliable delivery with long-term support
📩 Available for long-term projects & scalable app development
Let’s build something that performs and scales.
$5/hr
$1K+ earned
Available now
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Hi, I’m Tvisha — an AI-focused Full-Stack Developer with 7+ years of experience building scalable web and mobile applications, now specializing in AI-powered solutions using Python and OpenAI technologies.
I help startups and businesses design and develop intelligent applications, from GPT-based chatbots and automation tools to fully integrated AI features within mobile and web platforms. My focus is on delivering production-ready solutions with clean architecture, strong performance, and seamless user experience.
I specialize in building AI applications using Python frameworks such as FastAPI and Flask, combined with OpenAI (GPT-4) for features like conversational interfaces, content generation, summarization, and workflow automation. I also integrate these capabilities into mobile apps built with React Native and Flutter, ensuring a smooth and scalable end-to-end system.
My backend experience includes working with Node.js, Firebase, PostgreSQL, and MongoDB, along with designing REST and GraphQL APIs. I follow best practices for code quality, scalability, and deployment, enabling fast iterations and reliable releases.
Recent work includes AI-driven task management applications, voice-enabled apps with speech-to-text and NLP processing, healthcare platforms with intelligent workflows, and high-scale mobile apps with thousands of active users.
Clients value my ability to quickly understand requirements, communicate clearly, and deliver high-quality solutions within tight timelines. I am comfortable working independently or as part of a team and can take ownership of projects from concept to deployment.
If you are looking to build or enhance an AI-powered product using Python, GPT, or mobile technologies, I can help you bring it to market efficiently and effectively.
$14.99/hr
83%
Job Success
$90K+ earned
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𝗖𝗿𝗮𝘀𝗵 & 𝗕𝘂𝗶𝗹𝗱 𝗜𝘀𝘀𝘂𝗲 𝗥𝗲𝘃𝗶𝗲𝘄 👉 𝗙𝗿𝗲𝗲
✅ 𝗜𝗻𝗱𝗲𝗽𝗲𝗻𝗱𝗲𝗻𝘁 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 (𝗡𝗼 𝗢𝘂𝘁𝘀𝗼𝘂𝗿𝗰𝗶𝗻𝗴, 𝗡𝗼 𝗣𝗿𝗼𝘅𝘆 𝗪𝗼𝗿𝗸)
✅ 𝗠𝗼𝗯𝗶𝗹𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗘𝘅𝗽𝗲𝗿𝘁 (𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲, 𝗘𝘅𝗽𝗼, 𝗔𝗜 𝗔𝗽𝗽𝘀)
✅ 𝟱𝟬+ 𝗔𝗽𝗽𝘀 𝗣𝘂𝗯𝗹𝗶𝘀𝗵𝗲𝗱
📱 Mobile Development
#ReactNative #Expo #ExpoRouter #ExpoEAS #NativeCLI #iOS #Android #CrossPlatform #HybridApps #MobileDevelopment #AppDevelopment #ProgressiveWebApps #PWA
⚛️ Frontend
#React #JavaScript #TypeScript #ResponsiveUI #PixelPerfectUI #DesignSystems #ReusableComponents #Accessibility #DarkMode #ReactNavigation #Reanimated #FlashList
⚙️ Backend & APIs
#NodeJS #ExpressJS #NestJS #Django #DjangoRESTFramework #FastAPI #RESTAPI #GraphQL #BackendDevelopment #APIIntegration #ThirdPartyAPI #HeadlessCMS
☁️ Cloud & Databases
#Firebase #Supabase #Appwrite #AWSAmplify #MongoDB #PostgreSQL #MySQL #SQLite #Realm #CloudStorage #AWSS3 #FirebaseStorage
🔐 Authentication & Security
#Authentication #JWT #OAuth #OpenIDConnect #SocialLogin #GoogleSignIn #AppleSignIn #MagicLinks #Passwordless #MFA #RBAC #BiometricAuthentication #FaceID #TouchID
📩 Notifications & Deep Linking
#PushNotifications #FirebaseCloudMessaging #OneSignal #RealtimeNotifications #DeepLinking #UniversalLinks #AndroidAppLinks
💳 Payments
#Stripe #StripeConnect #RevenueCat #InAppPurchases #Subscriptions #ApplePay #GooglePay #GooglePlayBilling #PaymentGateway #MarketplacePayments
📍 Native Device Features
#GoogleMaps #Mapbox #Geolocation #GPSTracking #CameraIntegration #QRCodeScanner #BarcodeScanner #OCR #Bluetooth #BLE #NFC #HealthKit #HealthConnect #DocumentScanner
🤖 AI & LLM Integration
#AI #GenerativeAI #AIAgents #AIChatbots #ConversationalAI #OpenAI #ChatGPT #Claude #Gemini #Anthropic #Grok #LLM #RAG #LangChain #LlamaIndex #Pinecone #Weaviate #ChromaDB #VectorSearch #SemanticSearch #PromptEngineering #AIAutomation #SpeechToText #TextToSpeech #ComputerVision #ImageRecognition #AIRecommendations
📊 State Management
#Redux #ReduxToolkit #Zustand #ContextAPI #ReactQuery #TanStackQuery #SWR
⚡ Performance & Architecture
#CleanArchitecture #ScalableArchitecture #ModularArchitecture #PerformanceOptimization #LazyLoading #BundleOptimization #MemoryOptimization #BatteryOptimization #OfflineFirst #DataSync #SmoothAnimations #60FPS
🎨 UI/UX
#FigmaToReactNative #MobileUI #MobileUX #NativeLikeExperience #ComponentDrivenDevelopment #AdaptiveLayouts #ResponsiveDesign
💼 Services
#FullStackDevelopment #MobileApps #BackendIntegration #ExistingAppIntegration #WebToMobile #StartupMVP #SaaS #EnterpriseApps #CustomSoftware #AppMaintenance #AppOptimization
𝗦𝗵𝗼𝗼𝘁 𝗺𝗲 an invite! I’ll send a Loom video with my understanding of your project, the right technical approach, and how I’d lead it to a clean production ready version.
$40/hr
100%
Job Success
$30K+ earned
Available now
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🚀 12+ Years of Mobile App Development (Swift, Kotlin, Android, iOS, Xamarin C#, Flutter)
💻 30+ Apps with 20M+ Downloads
🤖 AI Assisted Programming + Vibe Code to Ship your MVP Faster
📙 Author - "From Campus to Code"
🔥 Worked at Forbes 500 and Fortune 1000 Companies
About Me:
Hi, I'm Nelson J., and I'm glad that you are here to turn your DREAM APP into reality. 🤩
I started programming in 2013 and have been using Flutter and Dart since 2019. I have been leveraging AI to ship fast using Claude Code, Cursor, Github CoPilot, Lovable AI etc.
About SoloBits:
I run SoloBits as a solo entrepreneur or solopreneur in Finland in the EU. Where I provide Software Development Services across the Globe.
The primary focus is to ship Tailored High Quality App while taking away all your Headache and Taking Ownership of the Tech and Shipping Fast by leveraging my experience and latest AI tech.
I have worked on 30+ Apps for STARTUPS, FORBES 500 & FORTUNE 1000 Companies 🚀 in the USA, Finland, New Zealand, Malaysia and across the globe. 🔥
✅ Here's what sets me apart:
- Over-delivering: I deliver marketable and maintainable products that I take pride in.
- Understanding beyond Development: With my experience working for both large and small companies, I have collaborated with various departments, gaining a deep understanding of their needs and mindsets.
- Tech Stuff: TDD (Test-Driven Development), SOLID principles, KISS (Keep It Simple, Stupid), YAGNI (You Ain't Gonna Need It) and All Other Acronyms + my “Pizza Philosophy” which I can explain on call 😉
💻 Here is what I do:
- Flutter/Dart
- iOS(Swift) & Android(Java, Kotlin) & Web Portals (Flutter/Dart, Wordpress) & Desktop App (Flutter/Dart, UWP C#)
- No/Low-Code + AI
- React
- REST/GraphQL APIs
- Firebase
- Payment integrations
- Ads integrations
- AI/GPT/Bard/Vertex/PaLM/OpenAI APIs
- Vibe Code and AI Assisted Programming
- ... & more
My goal is to not just deliver you CODE, everyone can do that. I am here to deliver you a PRODUCT that is MARKETABLE and MAINTAINABLE. 💻
The reality is that MARKET NEED 📈 is almost always different from our vision, and I am here to SUPPORT you through that too. Need to PIVOT or make some changes? I am here.
Let me take care of the Technical Jargon and you can focus on things that are more important, like BUSINESS. 🙂
Let's discuss your idea over an E-COFFEE. 🙂
---
Industries I Cover:
Education, Automotive, Fintech / Finance and Banking, Nature/Wildlife, Media and Publishing, Retail, Marketplace, Medical Dashboard, Utilities, Lifestyle, Advertising, Manufacturing, Dating, Hospitality, Asset Management, Logistics, Wellness, Entertainment, Cryptocurrency, Human Resources, LegalTech, Sports and Fitness, Travel and Tourism, Rental, Ecology, Business Innovations, Real Estate, Food Delivery, Fashion, Marketing, Healthcare, Navigation, Non-Profit, Transport, E-learning.
Highlighted Skills:
User-friendly Interface, Flutter, Architecture and RESTful APIs, AI Assisted programming, Project Management and Collaboration Tools (ClickUp, Jira, Trello), Mobile App Development, Blockchain and NFT, MVP SAAS, Database Design and Implementation (MongoDB, Firebase), Excellent Communication, QR Code Scanner, Develop and Maintain, Version Control Systems (Git, GitHub), ERP, Payment Gateway, Prototype, User Interface Design, Android, Chatbots, Deployment to Cloud Platforms (AWS), Test-driven Development, ChatGPT and Artificial Intelligence, Fix, Transform, Optimizing, Security Technologies, Payment Integration (Stripe), Documentation and Code Commenting, Web App Development, Agile Methodologies (Scrum, Kanban), GPS and Mapping, Create, Integrate Third-party APIs, Business-friendly Custom Development, CRM, Website and Web App from Scratch, Start-Up, Enhance, Implement, Marketing, Rebuild, Upgrade, Modernize, Vibe Code, Dart, iOS, Responsive and Mobile-first Design, E-commerce Solutions, SEO and Maintenance, Assist, Collaborate, High Proficiency, Great Problem-solving, Solution-oriented Delivery, Ensure Quality.
$15/hr
100%
Job Success
$100K+ earned
Available now
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I’m a 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐚𝐧𝐝 𝐖𝐨𝐫𝐝𝐏𝐫𝐞𝐬𝐬 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝐰𝐢𝐭𝐡 𝟕+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 building scalable digital products for startups and businesses.
My core expertise lies in developing 𝐨𝐩𝐭𝐢𝐦𝐮𝐦 𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐢𝐧𝐠 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 𝐮𝐬𝐢𝐧𝐠 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 𝐚𝐧𝐝 𝐑𝐞𝐚𝐜𝐭 𝐍𝐚𝐭𝐢𝐯𝐞, along with creating 𝐜𝐮𝐬𝐭𝐨𝐦 𝐰𝐞𝐛𝐬𝐢𝐭𝐞𝐬 𝐚𝐧𝐝 𝐞𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐮𝐬𝐢𝐧𝐠 𝐖𝐨𝐫𝐝𝐏𝐫𝐞𝐬𝐬 𝐚𝐧𝐝 𝐖𝐨𝐨𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞.
I implement 𝐀𝐈-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐟𝐞𝐚𝐭𝐮𝐫𝐞𝐬 𝐢𝐧 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐬 𝐚𝐧𝐝 𝐰𝐞𝐛𝐬𝐢𝐭𝐞𝐬 to enhance user experience and automate workflows, using 𝐀𝐈-𝐚𝐬𝐬𝐢𝐬𝐭𝐞𝐝 𝐭𝐨𝐨𝐥𝐬 to accelerate development and improve code quality. I follow 𝐦𝐨𝐝𝐞𝐫𝐧 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐩𝐫𝐚𝐜𝐭𝐢𝐜𝐞𝐬 to deliver reliable and scalable solutions.
✅ Core technologies I work with :
🔶 𝐌𝐨𝐛𝐢𝐥𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 ➤ Flutter │ React Native │ Dart │ JavaScript │ TypeScript
🔶 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬 ➤ Firebase │ Supabase │ PostgreSQL │ MySQL │ MariaDB │ Node.js
🔶 𝐂𝐌𝐒 ➤ WordPress │ WooCommerce │ PHP │ Advanced Custom Fields (ACF) │ WP CLI
🔶 𝐀𝐏𝐈 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 ➤ REST API │ GraphQL │ Third-party Services
🔶 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐓𝐨𝐨𝐥𝐬 ➤ Git / GitHub │ Docker │ CI/CD Pipelines
The services I provide include:
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✅ For Mobile Apps Development :
🔶 𝐄𝐧𝐝-𝐭𝐨-𝐞𝐧𝐝 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 i.e. planning, architecture, UI development, backend integration, testing, and deployment
🔶 Pixel-perfect 𝐔𝐈 𝐢𝐦𝐩𝐥𝐞𝐦𝐞𝐧𝐭𝐚𝐭𝐢𝐨𝐧 𝐟𝐫𝐨𝐦 𝐅𝐢𝐠𝐦𝐚, Adobe XD, or Sketch (including design systems and dark mode support)
🔶 𝐌𝐕𝐏 𝐚𝐩𝐩 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭
🔶 𝐀𝐏𝐈 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 (REST, GraphQL, and third-party services such as payments, maps, authentication, analytics, and social logins)
🔶 𝐀𝐩𝐩 𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐨𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧, code refactoring, and bug fixing
🔶 𝐀𝐩𝐩 𝐒𝐭𝐨𝐫𝐞 𝐚𝐧𝐝 𝐆𝐨𝐨𝐠𝐥𝐞 𝐏𝐥𝐚𝐲 𝐝𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭, release management, and crash monitoring setup
🔶 𝐎𝐧𝐠𝐨𝐢𝐧𝐠 𝐦𝐚𝐢𝐧𝐭𝐞𝐧𝐚𝐧𝐜𝐞, feature enhancements, and OS compatibility updates
✅ For Wordpress Development :
🔶 𝐂𝐮𝐬𝐭𝐨𝐦 𝐖𝐨𝐫𝐝𝐏𝐫𝐞𝐬𝐬 𝐰𝐞𝐛𝐬𝐢𝐭𝐞 development and theme customization
🔶 WordPress 𝐩𝐥𝐮𝐠𝐢𝐧 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 and custom functionality
🔶 𝐖𝐨𝐨𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 𝐬𝐭𝐨𝐫𝐞 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 and advanced store customization
🔶 𝐇𝐞𝐚𝐝𝐥𝐞𝐬𝐬 𝐖𝐨𝐫𝐝𝐏𝐫𝐞𝐬𝐬 integrations for modern front-end applications
🔶 𝐓𝐡𝐢𝐫𝐝-𝐩𝐚𝐫𝐭𝐲 𝐀𝐏𝐈 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 for payments, shipping, CRM, ERP, and external systems
🔶 𝐖𝐞𝐛𝐬𝐢𝐭𝐞 𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐨𝐩𝐭𝐢𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧 (Core Web Vitals, speed improvements)
🔶 𝐖𝐨𝐫𝐝𝐏𝐫𝐞𝐬𝐬 & 𝐖𝐨𝐨𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 𝐦𝐚𝐢𝐧𝐭𝐞𝐧𝐚𝐧𝐜𝐞, updates, and security hardening
Feel free to reach out to me. I would be happy to discuss your project in detail.
Associated with
The Brihaspati Infotech Pvt. Ltd.
$10M+
earned
$39/hr
100%
Job Success
$900K+ earned
Available now
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🌟8+ Years Experience | 50+ Projects | 20,000+ Hours | $900K+ Earned | Upwork Top Performer | Flutter Developer | Mobile App Developer
I’m a Flutter developer, mobile app developer, full stack developer, and web developer with 8+ years of experience building, fixing, and scaling mobile products for startups and growing companies. My work spans mobile app development, web development, and backend-connected product work, with a strong focus on clean architecture, smooth user experience, reliable delivery, and scalable app development.
I’ve worked across Flutter, Flutter Dart, Flutter Firebase, React, React Native, Xamarin developer projects, Xamarin Forms, Xamarin.Forms, .NET MAUI developer builds, Swift developer work, SwiftUI, iOS, Android, iOS developer tasks, iOS Swift, Android developer tasks, Android Kotlin, Kotlin, native app developer projects, AI app development, MVP development, API integration, and cross platform mobile app architecture. I also support teams that need a practical full stack developer who can connect mobile apps with APIs, dashboards, cloud services, and web systems without slowing the project down. That mix of mobile app development and web development lets me work across the full product, not just one part of it.
On Upwork, I’ve delivered 50+ projects, earned $800K+, and worked 20,000+ hours helping clients launch MVPs, modernize old apps, fix unstable codebases, and move products into production. That experience taught me how to balance speed with quality, especially when a project needs to ship quickly but still be stable enough for real users. It also taught me how to work with different teams, different product stages, and different technical constraints without losing momentum.
For new products, I help with MVP development from concept to launch. For existing products, I step in to improve architecture, refactor weak areas, and make the app easier to maintain and scale. If you’re building a cross platform mobile app, I can help choose the right direction between Flutter, React Native, .NET MAUI, Xamarin migration, or native app development depending on the product goals, timeline, and long-term plan. I focus on making those choices practical, not trendy, so the app can grow without becoming harder to manage.
I’m also a strong fit for AI app development projects where the product needs more than a basic interface. That might mean smart workflows, automated actions, backend logic, or API integration that connects the app to real business systems. In those projects, I pay close attention to stability, data flow, security, and the user experience, because a useful feature only matters if it works reliably in production.
💡 Areas I specialize in
- SaaS and startup MVP development - from idea to production-ready MVP.
- Cross platform mobile app architecture - Flutter, React Native, and .NET MAUI.
- App modernization and legacy migration - Xamarin to .NET MAUI, Flutter, or React Native.
- API integration and backend connectivity - for apps that need stable data flow and real-time features.
- AI app development and product automation - for teams that want smarter app experiences.
- Continuous delivery, refactoring, and codebase optimization - to keep existing products moving forward.
- Mobile app development for iOS and Android - with a focus on stability, performance, and usability.
- Full stack developer support - when mobile work needs web, API, or backend coordination.
- Native app developer support - when the project needs platform-specific quality and performance.
- React Native developer support - for teams already working in JavaScript-based mobile stacks.
- Swift developer and iOS developer support - for polished Apple ecosystem apps.
- Android developer support with Kotlin - for strong native Android performance.
- Flutter developer support - for fast cross platform mobile app delivery.
- Xamarin developer support - for legacy apps that need modernization or migration.
- .NET MAUI developer support - for teams moving toward a modern Microsoft stack.
- Cross platform mobile app delivery - when one codebase needs to support iOS and Android efficiently.
I’m a good fit when you need a mobile developer who can think beyond screens and help shape the full product. Whether the goal is a fresh MVP, a native app for iOS or native Android or a cross platform mobile app that can grow over time, I focus on code quality, maintainability, and practical results. I also make sure the work stays aligned with product goals, so the app is not just built well, but built in a way that supports growth and future updates.
🚀 If you need a Flutter developer, React Native developer, Xamarin developer, .NET MAUI developer, Swift developer, iOS developer, Android developer, Kotlin developer, mobile app developer, web developer, MVP developer, API integration expert or full stack developer who can bring structure to a build and get it shipped - message or invite me and let's start today!
Vitalii A.
has worked
.
Associated with
DevsX
$1M+
earned