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Hire the best Kotlin Developers in London, ENG

Check out Kotlin Developers in London, ENG with the skills you need for your next job.
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  • $70 hourly

    • 5.0/5
    • (28 jobs)
    🇺🇦 🌍 Ukrainian based in London ✅ 12+ years of experience in different technologies. 🚀 Application from idea to release ⌨️ Post-release maintenance and support 📱 30+ successfully developed applications ✅ Upwork Verified Top Rated Plus Developer ⭐⭐⭐⭐⭐ rating Welcome to my profile! With over a decade of dedicated development experience, I specialize in creating cutting-edge applications that deliver user-friendly, engaging, and performant experiences. My proficiency in product development enables me to bring any app idea from concept to launch seamlessly. My approach is collaborative and transparent, ensuring that communication is clear and expectations are aligned from the outset. I pride myself on my ability to solve complex problems and adapt to new challenges, which is reflected in the diverse range of projects in my portfolio. Clients appreciate my commitment to quality and attention to detail, whether I'm working on innovative startups or established enterprises. My goal is to not only meet but exceed your mobile app development needs, providing post-release support to ensure your application evolves with your business. I am Upwork Verified and have a track record of success, with consistent five-star feedback. If you're looking for a reliable, skilled, and proactive mobile developer, let's connect and bring your vision to life.
    Featured Skill Kotlin
    Project Management
    FinTech
    Dart
    User Authentication
    Smartphone
    Chat & Messaging Software
    JavaScript
    Swift
    Flutter
    Java
    TypeScript
    Android
    iOS
    Native App Development
  • $25 hourly

    • 5.0/5
    • (16 jobs)
    Hi, I'm Haseeb Islam – A Senior Full-Stack Developer with 7+ Years of Experience I specialize in scalable web and mobile applications, ensuring high-performance, clean architecture, and optimized user experiences. From startups to enterprise solutions, I build robust applications tailored to your needs. 🔹 𝗞𝗲𝘆 𝗔𝗰𝗵𝗶𝗲𝘃𝗲𝗺𝗲𝗻𝘁𝘀 Successfully delivered 50+ projects across diverse industries 🚀 Optimized performance and scalability, reducing infrastructure costs 🏆 100% Positive Client Feedback – Proven track record of excellence 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 & 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸: 🔹 Mobile App Development – React Native, Flutter, Expo, Kotlin, Swift 🔹 Web Development – React.js, Next.js, TypeScript, Tailwind CSS, Vue.js 🔹 Backend Development – Node.js, Express.js, NestJS, Laravel, GraphQL 🔹 Databases & Cloud – PostgreSQL, MongoDB, Firebase, AWS, Supabase, Vercel 🔹 API Development & Integration – RESTful APIs, GraphQL, WebSockets 🔹 E-commerce Solutions – Shopify, WooCommerce, Stripe, PayPal, Headless CMS 🔹 UI/UX & Performance Optimization – Figma, Chakra UI, Material UI, A/B Testing 🔹 DevOps & Infrastructure – Docker, Kubernetes, CI/CD, Cloudflare, Vercel 𝗦𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻𝘀: ✅ SaaS Platforms & Dashboards ✅ AI-Powered Applications (GPT, OpenAI, LangChain) ✅ Real-Time & Event-Driven Apps ✅ E-commerce & Subscription-Based Platforms ✅ Fintech & HealthTech Solutions ✅ Web3 & Blockchain Integrations (Solidity, Smart Contracts) 📌 𝗥𝗲𝗰𝗲𝗻𝘁 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 & 𝗖𝗮𝘀𝗲 𝗦𝘁𝘂𝗱𝗶𝗲𝘀 🔹 GymRite – AI-driven fitness app with personalized recommendations 🔹 BeeMe – Gamified personal development platform for kids 🔹 E-learning Platform – Interactive content with real-time notifications 🔹 Job Search Engine – AI-powered job matching with seamless UX 🔹 Scalable Shopify Stores – Custom API integrations & Stripe payments ✨ 𝗪𝗵𝘆 𝗪𝗼𝗿𝗸 𝗪𝗶𝘁𝗵 𝗠𝗲? ✔ Scalable & High-Performance Code – Clean architecture, best practices ✔ Agile Development Process – Delivering MVPs faster with rapid iteration ✔ Seamless Communication – Transparent and long-term collaboration ✔ Latest Tech & Trends – Always implementing cutting-edge solutions If you need a high-quality, scalable application, feel free to reach out. Let's turn your vision into reality, Let's work together to turn your vision into reality. Feel free to reach out to me anytime!
    Featured Skill Kotlin
    API Integration
    Redux
    DevOps
    MongoDB
    TypeScript
    JavaScript
    iOS Development
    React Native
    WordPress
    Laravel
    PHP
    Next.js
    Node.js
    React
  • $20 hourly

    • 4.9/5
    • (17 jobs)
    I have dedicated over 5 years to professional mobile app development, with a diverse skill set covering iOS, Android, Flutter native, and hybrid app development. During this extensive period, I have successfully crafted more than 25+ apps for clients and companies situated in the UK, USA, Germany, India, and Canada. My clientele ranges from scale-up ventures to Fortune 30+ enterprises. Here's what I bring to the table: ✅ Proficiency in Flutter and Dart. ✅ Expertise in iOS, Android, Swift, Objective-C, Java, and Kotlin. ✅ Capabilities in client/server development and database/web interfaces. ✅ Firebase, Firestore, Crashlytics, Analytics, Dynamic Links, Cloud Messaging ✅ A keen eye for UI/UX design. My knowledge of state management solutions such as Provider, Riverpod, GetX, MVC pattern, and Bloc, along with experience in working with different architectures like MVC and MVVM, has allowed me to create robust and efficient applications. I have also integrated various payment gateways like Paypal, Stripe, Rozarpay, and in-app purchases, ensuring seamless payment experiences for users. Should you be concerned about time-sensitive seasonal updates or feature enhancements, rest assured that I've got you covered. I prioritize building enduring partnerships with my clients, eliminating the need for you to engage multiple developers for each modification or outdated library. I'm eager to transform your concepts into reality, so please don't hesitate to get in touch and discuss your requirements.
    Featured Skill Kotlin
    CI/CD
    AOSP
    Flutter Stack
    FlutterFlow
    Mobile App
    API Integration
    Mobile App Development
    Firebase
    Dart
    iOS Development
    MongoDB
    iOS
    Flutter
    Android
  • $30 hourly

    • 5.0/5
    • (12 jobs)
    ➤ Top Rated Plus | 10+ Years of Experience | 700+ Successful Apps ➤ iOS (Swift, Swift UI) ➤ Android (Kotlin, Java) ➤MERN-Stack ➤Figma ➤ Flutter ➤ React Native ➤UI/UX ➤Machine Learning ➤Backend (Node.js, Firebase, APIs) ➤MVP Strategist ➤SEO ➤ASO Helping Startups & Enterprises Scale with Cutting-Edge Apps: I didn’t just become a developer; I built my career from the ground up with passion, perseverance, and an unstoppable drive to create something impactful. Over the years, I’ve had the honor of developing 700+ successful apps, some of which are now worth millions of dollars and have been acquired by companies like Apple. I’ve worked with startups who had just an idea and transformed it into a profitable business. I’ve helped enterprises scale with cutting-edge mobile solutions. And I can do the same for you! Why Am I the Best Fit for Your Project? ✅ Over 10 years of experience in mobile app development ✅ Built and launched 700+ apps across various industries ✅ Created solutions that have generated millions in revenue ✅ Expertise in Swift, Kotlin, Flutter, React Native & more ✅ Helped startups secure funding through MVP development ✅ Seamless UI/UX for exceptional user experience ✅ 100% client satisfaction & long-term partnerships ✅ Two-way transparent communication—your vision, my expertise What I Can Do for You? 💡 Turn your app idea into reality—from concept to launch 💡 Redesign & upgrade your existing app for better engagement 💡 Optimize app performance & security for a seamless experience 💡 Reduce maintenance costs with efficient coding practices 💡 Integrate AI & machine learning for next-level innovation 💡 Strategize your app’s success to attract more users & revenue Client Reviews & My Work Ethic 🌟 Over-Delivering: I give my best, exceeding expectations every time 📞 Responsiveness: Quick and clear communication—always available 🔎 Problem-Solver: I don’t just code, I find solutions 🤝 Your Success = My Success: Every project I take is a mission, not just a task My Services ✅ iOS & Android App Development (Native & Hybrid) ✅ Full-Stack Development (Backend, APIs, Firebase, Node.js) ✅ UI/UX Design (Figma, Interactive Prototypes) ✅ MVP Strategy & Prototyping ✅ App Store Optimization (ASO) & SEO Industries I’ve Worked In: 🚖 Taxi Booking Apps | 🛒 E-Commerce & Marketplace | 🍔 Food Delivery | 💳 Fintech & Banking | 🏥 Healthcare | 🏋️‍♂️ Fitness & Wellness | 📅 On-Demand Services | ❤️ Dating Apps Let's Build Something Legendary! 📩 Message me now to discuss your project or schedule a free consultation. Your dream app is just one step away from reality! 🚀
    Featured Skill Kotlin
    FlutterFlow
    Android App
    Native App
    UIKit
    iOS Development
    Mobile App
    Laravel
    Mobile App Development
    React Native
    Swift
    Push Notifications
    Android Studio
  • $75 hourly

    • 5.0/5
    • (31 jobs)
    PROFILE • Software Development professional with more than 20 years experience in full cycle development and a proven track record of meeting clients' expectations and producing user-friendly applications. • Senior Full Stack Developer / Consultant with strong server-side and front-end experience. • Deep experience in highly concurrent scalable web applications and enterprise platforms. • End-to-end architecture and implementation of client-server systems. • Technical troubleshooter of enterprise software projects • Immense expertise in software project along with hands-on software architecture design and development experience. • Accomplished manager, team builder, software development life cycle management expert connoisseur ARCHITECTURE, METHODOLOGIES AND TECHNIQUES • Microservices Architecture • Test Driven Development (TDD) • Object Oriented Programming & Fundamental OOP Design Patterns • MVC Architectural Pattern • Inversion of Control and Dependency Injection • Anti-Patterns of Software Engineering to Avoid • Agile (Scrum, Kanban), Sequential (Waterfall) Development Practices • DevOps Culture - Continuous Integration and Continuous Delivery (CI/CD)
    Featured Skill Kotlin
    P5.JS
    Software Design
    Three.js
    Software
    Database
    Java
    JavaScript
    Python
    C#
    TypeScript
    Software Architecture & Design
    Microservice
    React
    NFT Collection Generation
    Jakarta EE
  • $40 hourly

    • 5.0/5
    • (1 job)
    I have 7+ years of experience developing Android App. I am very experience using software architecture and tools, including MVVM, MVP, Android JetPack, Dagger, RxJava, Junit and Git I have 3 years of experience using Kotlin and 15 years using Java. Java Certifications: Java Programmer(OCJP), Java Software Developer (OCJD), Java Web Developer(OCWCD)
    Featured Skill Kotlin
    RxJava
    Model View Presenter
    Android Room Persistence
    Dagger 2
    Model View ViewModel
    Android App Development
    JUnit
    Java
    SQLite
  • $105 hourly

    • 5.0/5
    • (14 jobs)
    Passionate about delivering real value to real people. Expert at developing high-quality software solutions that leverage appropriate automation techniques.
    Featured Skill Kotlin
    Back-End Development
    IT Career Coaching
    REST API
    API Framework
    Domain-Driven Design
    Clean Architecture
    Spring Boot
    Scala
    Java
    API Integration
    DevOps
    Kubernetes
    API Development
    Agile Software Development
  • $55 hourly

    • 5.0/5
    • (3 jobs)
    I’m a seasoned backend developer with over five years of hands-on experience in crafting robust, high-performance systems for industries ranging from AdTech and IoT to FinTech and Automotive. Whether you need a custom API, a seamless cloud migration, or a scalable backend architecture, I’m here to help! • Backend Development: Java, Spring Boot, Kafka, Kotlin, and Quarkus for building reliable, scalable solutions • Cloud Proficiency: Skilled in AWS architecture and Terraform for efficient cloud deployments and cost savings • Legacy System Migration: Expertise in upgrading legacy systems to modern platforms, reducing costs and boosting performance • Collaborative & Communicative: Worked across diverse teams, ensuring smooth project rollouts and seamless transitions I’m passionate about backend excellence and delivering solutions that truly make a difference. Let's keep in touch and discuss how I can support your project needs!
    Featured Skill Kotlin
    GraphQL
    REST API
    Google Cloud Platform
    Docker
    Terraform
    Kubernetes
    MongoDB
    Amazon DynamoDB
    MySQL
    PostgreSQL
    Spring Cloud
    Spring Security
    Spring Boot
    Java
  • $60 hourly

    • 4.8/5
    • (3 jobs)
    10 years of professional experience in Android development Strong design skill with the ability to take projects on my own Versatile experience across large firms like Lloyds and Sky, as well as small startups with less than 10 employees Proficient in web full-stack development Strong knowledge in computer graphics
    Featured Skill Kotlin
    Node.js
    TypeScript
    React
    Android
  • $45 hourly

    • 5.0/5
    • (2 jobs)
    I have 7+ years of experience in both React and React Native, enabling me to create seamless applications for mobile devices using React Native and for the web using React. I specialize in utilizing Redux for state management, REST APIs for backend communication, and React Router for efficient routing. 📁 My skills related to Mobile & Web development: 🔹 Front-end: •React •TypeScript •React Native 🔹 UI Libraries: •Material-UI •Ant Design •Bootstrap 🔹 Database: •SQLite •Firebase •MongoDB 🔹 Version Control: •Git •AWS •Bitbucket 🔹 Testing: •Cypress 🔹 Styling: •CSS• SCSS •Styled Components I focus on implementing the latest stable technologies to ensure that applications require minimal maintenance and have highly reusable code and components. I follow an agile development process using JIRA to ensure efficient project management and timely delivery of high-quality applications.
    Featured Skill Kotlin
    Swift
    Firebase
    Mobile UI Design
    Mobile App Development
    Hybrid App Development
    Hybrid App
    Native App Development
    React Native
    JavaScript
    MySQL
    MongoDB
    ExpressJS
    Node.js
    React
  • $60 hourly

    • 4.9/5
    • (85 jobs)
    I am an expert-vetted software engineer and outsourcing consultant with 10 years of experience in mobile apps, Web development, and outsourcing services. I have worked with many startups and leading development agencies across the globe to build great mobile apps and Websites for them. Past Achievements: - Successfully set up outsourcing/back-office operations for Australian-based public listed companies. - Built an award-winning Mobile App for Bible readers. Expertise: ✅Mobile Development: - iOS (Swift/Objective-C) - Android (Kotlin/Java/Android SDK) - React Native - Flutter ✅ Web Development: - MEAN Stack / MERN Stack - ReactJS - PHP ✅E-commerce Development: - Magento - Shopify - BigCommerce ✅ Content Management Systems (CMS): - WordPress ✅Immersive Technologies: - Virtual reality - Augmented Reality Project Management & Specialized Skills: - Business Process Automation & Integration: Streamline workflows and connect applications to enhance efficiency. - Full-Stack Web Development: Build custom web applications from the user interface to the backend. - Responsive Web Design (RWD): Design websites that adapt seamlessly to any device (desktop, tablet, mobile). - Project Management: Effectively manage projects using Agile Scrum methodology (team lead experience). I'm your go-to person to bring your tech dreams to life! Tags: Mobile Development | Web Development | E-commerce Development | Content Management Systems (CMS) | AR/VR Development | Project Management | Agile Scrum | Upwork | Freelancer | Mobile App Development | Web App Development | Full-Stack Development | Responsive Web Design | UI/UX Design | API Integration | Business Process Automation | Cloud Platforms (AWS, Azure, GCP) | Version Control (Git, SVN) | PHP | ReactJS | React Native | Flutter | MEAN Stack | MERN Stack | Magento | Shopify | BigCommerce | WordPress | iOS Development (Swift/Objective-C) | Android Development (Java/Kotlin)
    Featured Skill Kotlin
    AR & VR
    Shopify
    Full-Stack Development
    WordPress
    Node.js
    Angular
    PHP
    React
    React Native
    Swift
    Flutter
    Android App Development
    iOS Development
    Mobile App Development
  • $100 hourly

    • 5.0/5
    • (19 jobs)
    I have 10+ years of experience in building user-friendly and complex mobile applications. I have a solid knowledge of modern mobile app development using Kotlin, Jetpack Compose, Clean Architecture, high standards, and the latest trends in Android technology's stack. Digging into business problems is a crucial part of my approach. I believe in architecting solutions that not only meet immediate technical needs but also align with the business goals of the organization. Important highlights of my work: • Most Mobile apps in my portfolio are built from scratch by me where I was a leading engineer. • My response time is 1 hour maximum. I am always in touch. • I know how to achieve a 99.9% crash-free rate. • I was elevating the app rating from 2.8 to 4.6 stars out of 5 in Google Play. • I am not an agency, I am doing 100% work in person. • I provide efficient work and I am able to replace a small mobile team. • My hourly rate is negotiable. Feel free to suggest your rate. My technical skills: • Programming languages: Kotlin, Java, SQL. • Tools: Kotlin coroutines, RxJava, Retrofit, Apollo GraphQL, Dagger/Hilt, Room, Android architecture components. • Frameworks: Android, Jetpack Compose, Firebase, Facebook, AdMob, Google Maps, Segment, Iterable, Apollo GraphQL. • Architecture: Multi-modular, Clean, MVP, MVI, MVVM • Environments: Android Studio, JIRA, Confluence, Youtrack, Git, Jenkins. • Methodologies: Agile, Scrum, Kanban • CI: Bitrise, Jenkins • VCS: Github, Gitlab, Bitbucket • Image loading and caching: Picasso, Glide, Coil. • Unit tests: JUnit, Mockito, Robolectric. • Other: Team leadership, Code review, Scrum master, Consultant, Mentor. Let's collaborate to bring your mobile app ideas to life and make them stand out in the competitive app market.
    Featured Skill Kotlin
    JetPack
    Flutter
    Android App Development
    Java
    Android
    Native App Development
  • $90 hourly

    • 5.0/5
    • (25 jobs)
    Hi all! 100% satisfied clients on Freelance platforms! I have been building softwares for various different clients/employers for more than 10 years. I have experience with a wide range of companies, going from early-age startups, to UK top retailers, consultancies, also international top tech companies such as Amazon. I love building robust, scalable and maintanable software solving a customer problem. My career led me to work in both permanent and contract positions. I am highly business focus in my work and understand the necessary tradeoffs between delivering fast and delivering well. As a full stack engineer, I can jump in immediately and be productive on the project from the first days. My main skills include: - Architecture Design - Smooth communication processes and high availability - Robust, modular and well documented code - Easy to read and maintainable code - I will not let you down Main Languages and skills: - Backend: Java, Spring, Kotlin, Node, Microservices, AWS - Frontend: Typescript, Angular, React, React Native, Electron - CI/CD: CircleCI, Gitlab, Jenkins - Cloud: AWS (S3, IAM, Lambda, ECS, DynamoDB, Aurora) Looking forward to hearing about your projects and working with you! Cheers, Paul
    Featured Skill Kotlin
    AWS Fargate
    AWS CloudFront
    AWS Lambda
    Automated Deployment Pipeline
    Spring Security
    CircleCI
    Amazon DynamoDB
    React
    Spring Framework
    JavaScript
    TypeScript
    Java
    React Native
  • $40 hourly

    • 4.5/5
    • (55 jobs)
    Full stack mobile app developer with 15+ years of experience in Mobile App Development, specializing in Flutter, React Native, React, IOS, Swift, Android, Python, and Java. I have successfully delivered 120+ mobile applications in different roles as flutter app developer, flutter full stack developer, flutter flow, mobile app design, mobile ui ux designer, ios developer, android developer, react native developer, mobile game developer achieving a 5-star rating on Upwork and helping clients scale their businesses with high-performance solutions. 🚀 Flutter Mobile App Developer | Mobile UI/UX Designer | Mobile Game Developer | Mobile Web Developer for Mobile app development project. Expert in Flutter mobile app development, delivering 30+ high-performance apps with pixel-perfect UI and smooth animations. Skilled in clean architecture and comprehensive testing for robust solutions. 🔹 Applied game mechanics for engaging experiences in mobile development where I was a Mobile Game Developer. 🔹 Integrated real-time features, secure authentication, and cloud functions as Flutter Firebase Developer. 🔹 Built seamless API integrations and data synchronization in mobile development in Flutter mobile app development as a Flutter Laravel Specialist. 🚀 iOS app developer | Mobile UI/UX Designer | Mobile Game Developer | Mobile Web Developer in mobile app development: Developed and optimized 40+ iOS apps using Swift. Implemented complex features as iOS app developer, maintaining clean architecture and best practices. Leveraged extensive experience as iOS developer Swift to create intuitive user experiences and solve challenging technical problems. Collaborated with cross-functional teams as Swift iOS developer, utilizing Kotlin Swift expertise to deliver high-quality applications on time and exceed client expectations on iOS Swift smartphone platforms. 🚀 Android Developer | Mobile UI/UX Designer | Mobile Game Developer | Mobile Web Developer in mobile app development: Built 30+ Android apps with adaptive UI, material design, and battery-friendly performance. Expert in Android Kotlin developer, leveraging Kotlin Swift and Kotlin Multiplatform for cross-platform solutions. Optimized security as Android reverse engineer and streamlined releases as Android app publisher, enhancing engagement and update efficiency. 🚀React Native Developer | Mobile UI/UX Designer | Mobile Game Developer | Mobile Web Developer in mobile app development: Built 20+ cross-platform apps with responsive UI and seamless sync. Expert in React Native mobile, React Native Expo, and React Native Firebase for real-time features. Optimized communication with React Native WebRTC. Crafted interactive experiences as React JS and Front End React specialist. Developed hybrid solutions as Java React expert, maximizing code reuse. 📱 Performance & Scalability: Built apps supporting 1M+ users, integrating real-time updates, gamification, and video streaming. 💰 Business Impact: Helped startups and enterprises generate $10M+ in revenue through well-optimized and engaging mobile applications. iOS App Development Case Study 📱 Developed a high-performance iOS app using iOS Swift that achieved 5 star rating and featured status in the App Store. Implemented Flutter iOS compatibility for future cross-platform expansion while maintaining native performance and security. Supported iOS app marketing efforts with analytics implementation and App Store optimization, resulting in 35% higher user retention than industry average. I am currently not accepting WordPress projects as I'm focusing exclusively on mobile app development. Professional Achievements 🚀 Rewarded as 🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 𝗣𝗟𝗨𝗦 🏆 🚀 4154 mobile app development hours on Upwork and still counting 🚀 100% Job Success in mobile app development (Client Satisfaction Ratio) 🚀 54+ mobile app development jobs completed successfully ✅ 98% of Clients Recommended working with me ✅ 80% Long-term Repeat Clients ✅ 15+ Years Of Experience in mobile app development, 6 years experience in Flutter mobile app development, 7 years experience in Swift and Kotlin, 4 years experience in React Native. ✅ High-Quality Work ✅ Cost-Effective ✅ Fluent English Verified ✅ 93% on-time delivery rate across all mobile app development milestones Got an app idea that you think is ready to make a splash? Let's dive in and explore it together in a free intro call
    Featured Skill Kotlin
    Node.js
    App Development
    Hybrid App Development
    Web Design
    Web Development
    JavaScript
    Git
    Smartphone
    React Native
    Android App Development
    iOS Development
    Mobile App Testing
    Mobile App Development
    Flutter
  • $40 hourly

    • 5.0/5
    • (6 jobs)
    Experienced Software Engineer with a demonstrated history of working in large systems and travel industry. Skilled in Java and Kubernetes. Strong engineering professional with a BA focused in Computer Science. Technical Proficiency: • Languages: Java (10 years+), Kotlin, Groovy, SQL, Typescript. • Spring: Spring Boot, Spring AMQP, Spring REST, Spring Framework, Spring Web, Spring Data. • Frameworks Micronault, Hibernate, JMS, JNDI, JDBC, JSF, JPA. • Test Frameworks: JUnit, Mockito, Selenium, Spock, Cucumber. • Integration: gRPC, REST, SOAP, XML, JSON. • Architectural competencies: Business Modeling, Design Patterns, Performance Tuning, Environments, Excellent debugging skills. • Application Servers: Oracle Weblogic 11g, JBoss AS 7, Tomcat, Glassfish, Undertow • Databases: Oracle 10g+, MSSQLServer 2005+, PostgreSQL, MySQL, MongoDB. • Tools: Eclipse, Netbeans, JasperETL, IntelliJ Certifications: • Oracle Certified Expert, Java EE 6 JavaBeans Developer • Oracle Certified Expert, Java EE 6 Java Persistence API • Oracle Certified Expert, Java EE 6 Web Component Developer • Oracle Certified Professional, Java SE 6 Programmer. • Oracle PL/SQL Developer Certified Associate
    Featured Skill Kotlin
    RESTful Architecture
    Golang
    Spring Framework
    Java Persistence API
    MongoDB
    Microservice
    Hibernate
    Spring Boot
    Java
  • $40 hourly

    • 4.9/5
    • (3 jobs)
    Results-oriented, organized, collaborative, and highly skilled iOS developer with 7+ years of experience and a great sense of responsibility. Highly experienced in building apps for iOS, iPadOS, tvOS, etc. I can be responsible for the entire development process, from the creation of the idea, creating a development strategy, product MVP development, and testing, all the way to the final release of the application on the App Store and further maintenance. On a wider scope, I have substantial experience in Android development, Web technologies, and DevOps. This makes me a very good team player, able to understand and collaborate well with other mobile developers as well as Backend and DevOps Engineers.
    Featured Skill Kotlin
    iPad App Development
    tvOS
    Tablet
    Map Integration
    Mobile App Development
    iOS
    Apple Xcode
    Android
    iOS Development
    Android Studio
    RxSwift
    Swift
    Java
    Android App Development
  • $10 hourly

    • 5.0/5
    • (5 jobs)
    talented Android Developer with over 4 years of software development experience Along with a deep knowledge of Android SDK and a tendency to utilizing the edge technologies, developing professional applications with Kotlin and flutter. ( used REST API, google map, OpenStreetMap, Room , use social media networks, Firebase, google analytics, AR libraries, Email, SMS, Push Notification, Admob, Facebook Connect, Instagram API, Calendar SDK, Third-Party SDK, UI, GIT, Database API like Camera, Geo location, Contacts, Device, Local Storage, In-App Browser.
    Featured Skill Kotlin
    Model View ViewModel
    Android App
    Mobile App
    Android SDK
    React Native
    JavaScript
    Mobile App Development
    iOS Development
    Android App Development
    Flutter
    Android
    Android Studio
    Native App Development
  • $24 hourly

    • 5.0/5
    • (2 jobs)
    Let me take those tedious day-to-day operations and management of your projects and the technical pain points that are important but never get done completely off your team's plate. As an industry expert with 20 years specialized in engineering and financial full-stack application development, rest assure that your software backlog will be managed by someone you fully trust, that sees no issue as too big nor too small and whom takes your software roadmap and tickets as if it were their own. With my experience I will add value to a small-medium size firm with my quick to market development skills for React,.NET Core, ASP .NET Core, Azure Github CI/CD, high performance computing and Android Kotlin apps, NinjaTrader API Backtesting Trading Strategies, Black Scholes/Heston/MonteCarlo model pricing in C#/C++, Business Intelligence Visualization Splunk.
    Featured Skill Kotlin
    .NET Core
    Microsoft Visual C++
    Quantitative Analysis
    Splunk
    .NET Remoting
    C#
    SQL
    React
    ASP.NET Core
    MongoDB
    ASP.NET Web API
    Golang
  • $30 hourly

    • 5.0/5
    • (2 jobs)
    I am a seasoned Full-Stack Software Engineer with experience at top-tier companies like eBay and Optiver, I specialise in developing robust web applications utilising test-driven development. With a strong background in both front-end and back-end development, I excel in building and maintaining scalable systems, managing end-to-end project delivery, debugging and solving complex issues. My expertise spans Java, Python, Typescript/React and a multitude of databases, making me adept at creating high-performance solutions tailored to meet your business needs. Technologies/services include but are not limited to Docker, NodeJS, AWS, Flask, Django, REST, Apache, Kubernetes and AI. Please reach out if you want to hear more about my background!
    Featured Skill Kotlin
    Node.js
    AWS Lambda
    Git
    MongoDB
    Test-Driven Development
    CI/CD
    Docker
    AI Implementation
    Ionic Framework
    Java
    React
    TypeScript
    Python
    Full-Stack Development
  • $10 hourly

    • 4.8/5
    • (7 jobs)
    As a dedicated Full-Stack Web Application Developer with a Bachelor of Science in Computer Science from the University of London, I bring a robust background in developing dynamic and efficient web applications. With over 9 years of professional experience building scalable, efficient, and user-friendly applications. I specialize in creating custom solutions tailored to your unique needs, whether it's a dynamic front-end, a powerful back-end, or a complete end-to-end system. Expertise Across Technologies: Front-end: React.js, Laravel, JavaScript, and Kotlin. Back-end: Django, Laravel, PHP, and .NET. Database: MySQL, and API integration for seamless data management. Problem-Solving Mindset: I don’t just code—I solve problems! I’ll help you streamline workflows, optimize performance, and create a product that stands out in the market. Custom Solutions: From e-commerce platforms and business management tools to APIs and mobile-friendly web apps, I’ve done it all! Clear Communication: I understand how important collaboration is. You’ll always know the progress of your project and have your concerns addressed promptly. Let’s work together to bring your ideas to life and take your business to the next level!
    Featured Skill Kotlin
    PostgreSQL
    Julia
    MySQL
    PHP
    Django
    Laravel
    ASP.NET
    React
    C
    API Integration
    Back-End Development
    Front-End Development
    WordPress Development
    Full-Stack Development
  • $20 hourly

    • 5.0/5
    • (6 jobs)
    Full Stack Developer (FLutter, PHP, Angular) With 15+ years of experience in development and business analysis, I have worked across various sectors and international clients to bring their business ideas to reality. My core expertise Flutter, Python. Working frontend and backend for Mobile Applications. Cloud resource deployment including GCP, Azure, CI and CD, Jenkins, GIT Node JS, Python, Flutter, Swift, Kotlin, Laravel, Codeigniter, PHP I always satisfy clients with high end results. Thanks,
    Featured Skill Kotlin
    Android
    Laravel
    Java
    Hybrid App Development
    Flutter
    Mobile App Development
    CRM Development
    API Development
    PHP
    Swift
    WordPress
  • $20 hourly

    • 4.9/5
    • (49 jobs)
    Young and energetic with a new Innovative Ideas. Expertise on Web Design, Web Development, Graphic design , mobile app development, Digital Marketing & 2D Animation video. My Journey Started with a couple of local clients from London while doing my graduation and now feeling great after having clients from all over the world within 4 Years of time. I am focused to provide Ultimate solution for IT/Software solution at one place for my clients requirements. My Aim is on quality of work and therefore I am looking to provide a great experience & 100% satisfaction to my respected clients from all over globe.
    Featured Skill Kotlin
    Web Application
    Mobile UI Design
    Figma
    UI/UX Prototyping
    Laravel
    iOS Development
    Mobile App Development
    Android App Development
    React Native
    Firebase Cloud Firestore
    Swift
    AngularJS
    PHP
    Flutter
  • $40 hourly

    • 4.7/5
    • (8 jobs)
    I'm Wisdom, known as the "Docs Guru." With over three years of experience as a Technical Writer specializing in API Documentation, I work with companies worldwide to showcase their innovative solutions to diverse audiences. My expertise lies in collaborating with SaaS providers. I am passionate about docs-as-code, workflow optimization, SaaS/API integration, style guide development, and creating engaging visual resources. My skills involve creating developer-focused documentation for web services, APIs, libraries, and software products. I have a wide range of experience, from precise API references to hands-on tutorials, walkthroughs, sample applications, and comprehensive best practices guides. What sets me apart is my ability to manage the entire documentation process, from start to ongoing maintenance, ensuring a seamless experience for my clients. In addition, I am well-versed in various documentation tools available in the market and can effectively implement tools that suit a company's specific needs. This includes recent API documentation tools such as Redocly, Readme, Postman, Spotlight. Embracing a modern approach to documentation, I prioritize user research, usability testing, and automation methods. Drawing inspiration from DevOps principles, I infuse a software development mindset into every project, ensuring client documentation evolves in sync with their products, promoting scalability and adaptability.
    Featured Skill Kotlin
    Git
    GitHub
    Software Development
    Coaching
    Editing & Proofreading
    Technical Documentation Management
    API Documentation
    Software Documentation
    Technical Writing
    Technical Documentation
    Mobile App Development
    Dart
    Android App Development
    Blog Writing
  • $30 hourly

    • 4.8/5
    • (27 jobs)
    Over 5 years of progressive experience in Mobile application development including Native and Hybrid platform. I am highly skilled when it comes to coding mobile & web applications from scratch. My technical Skills & Expertise: • iOS Apps Development (iPad, iPhone): Swift, Objective C, Cocoa, XCode • Android Apps Development: Java and Kotlin • Backend: PHP, ROR, Node.js • Database Expertise: MySQL, PostgreSQL, MongoDB, DynamoDB, Amazon DynamoDB. • Third-Party APIs: Facebook, Twitter, Instagram, Parse, Google Map, Google Directions, Google Custom Search, Stripe, Dropbox API. My services: • Clean and modern style graphics and user-friendly UI • Clean, bug-free, and highly structured source code • Regular report of project status with relevant deliverable • Free Bug-Fix support for 1 month after completion I have a strong grip over developing these below-listed domain's app: 1) Photo Editing app 2) Traveling App 3) Food and Beverages App 4) Social Media App 5) On-demand service application 5) Utility/E-commerce App 6) Real Estate App 7) Taxi Application 8) Learning Management Solution (LMS) I provide the following services: - My major service: App and Web development - Dev Platforms: iOS, iPhone, iPad, Android, Tablet and Web - Practices: Lean Development, Code review, Unit testing, daily commits - Main focus: Pixel-perfect design and robustness - Awards from clients for Collaboration, Robust code, efficient communications - Development approach: Requirement Analysis, Design, Programming, Testing, Deployment, Support & Maintenance - Communication approach: Collaboration in the pipeline, Daily work updates by Upwork, or any other media, Weekly builds. - Additional services: Back-end programming and server setup and management
    Featured Skill Kotlin
    Dart
    Android App Development
    Flutter
    PHP
    Node.js
    iOS
    iOS Development
    Java
    Android
    SQLite
    Swift
    Hybrid App Development
  • $20 hourly

    • 5.0/5
    • (2 jobs)
    ✅ Over 3 Years iOS and Android App Development Experience including Admin Portal and Customer Facing Website Development. Expert in Swift/Java/Kotlin/React Native/Node.js/PHP programming. Analysis of business cases - software design and specifications, end to end development, testing and maintenance work. Experience in Mobile Development(iOS,Android), Test and Process Automation and Mobile App Management and thrive to learn more. Extensive experience in Java, Swift, Kotlin, PHP, SQL, C#, HTML, JavaScript, Bootstrap, React Native, Node.js and more. I can make both iOS and Android apps alongside admin portal implementations from scratch and have already developed So many mobile applications. Also able to include brand and logo designs as well as customer facing websites for your business!
    Featured Skill Kotlin
    NodeJS Framework
    React Native
    Node.js
    iOS
    Java
    RESTful API
    JSON
    Firebase
    Mobile App Development
    GIS
    Android Studio
    Google Play
    JavaScript
  • $55 hourly

    • 0.0/5
    • (0 jobs)
    WHY ME? * Proactive & solution-focused software development expert having 8+ years of experience in software development. * Passionate about mobile development, best practices and clean code. Always keeping up to date with the latest technologies in Android and improving my skills. * Possesses extensive knowledge of agile methodology, software construction, object-oriented programming, design & analysis, UI/Unit testing. * Proficiency in Kotlin and Java, experience with Android Jetpack, SDKs, libraries such as coroutines, Rxjava, RxAndroid, REST Api, and software design patterns such as MVC,MVP, MVVM and practices.
    Featured Skill Kotlin
    WordPress
    iOS Development
    React
    RxJava
    Vue.js
    Java
    React Native
    Flutter
    Android App Development
  • $30 hourly

    • 0.0/5
    • (0 jobs)
    💪 Welcome to my Upwork profile! I am a highly skilled and experienced web developer and app developer specializing in WordPress, Shopify, Webflow, WooCommerce, Plugin Customization, Theme Customization, Speed Optimization, and Bug Fixing. With over 7 years of experience, I deliver responsive, high-performance websites and mobile applications that are tailored to meet your unique business needs. ⭐ WordPress Development Expert As a WordPress specialist, I offer comprehensive WordPress development services, including full website builds, WordPress bug fixing, theme customization, and plugin development. Whether you need a blog, e-commerce site, or business website, I will ensure your site is fully optimized, responsive, and user-friendly. ⭐ Shopify Development Specialist I specialize in creating and customizing Shopify stores to help your business thrive online. From custom Shopify themes to payment gateway integrations and performance optimizations, I provide end-to-end Shopify solutions designed to increase your sales and online presence. ⭐ Webflow Expert I provide professional Webflow development services, creating visually stunning, modern, and responsive websites that are designed to improve user experience and engagement. Whether you need a portfolio, business site, or e-commerce platform, I ensure your website stands out in design and performance. ⭐ WooCommerce Customization Specialist With my in-depth knowledge of WooCommerce, I offer complete solutions for your online store, including product setup, custom checkout processes, subscription services, and payment gateway integrations. I ensure that your WooCommerce store is optimized for both performance and conversion. ⭐ App Development & Bug Fixing As a skilled Flutter app developer, I specialize in creating cross-platform mobile applications that are fast, reliable, and packed with features. I also provide expert app bug fixing services to ensure your applications run smoothly without errors and deliver a flawless user experience. ⭐ Plugin Customization & Development Enhance the functionality of your WordPress website with my expertise in plugin customization and plugin development. Whether you need minor adjustments or full-scale plugin development, I ensure seamless integration and enhanced functionality for your site. ⭐ Theme Customization Services Your website's design and layout are crucial to engaging visitors. I provide expert theme customization for WordPress, Shopify, and Webflow, ensuring a unique, professional look that aligns perfectly with your brand and business goals. ⭐ Website Speed Optimization Slow websites can hurt both user experience and SEO rankings. I specialize in website speed optimization for WordPress, Shopify, Webflow, and custom-built websites, ensuring improved load times, better SEO rankings, and an enhanced overall user experience. ⭐ Additional Areas of Expertise I also offer specialized services in: Custom WordPress Development Shopify Dropshipping Setup Mobile-Friendly Web Design E-commerce SEO Optimization Conversion Rate Optimization (CRO) Cross-platform App Development Website Maintenance API Integrations for Web and Mobile WordPress & Shopify Security Enhancements UX/UI Design for Web & Mobile Apps ⭐ Why Choose Me? 👉 Proven Expertise in Web Development and App Development 👉 Extensive Experience with WordPress, Shopify, Webflow, WooCommerce, and Flutter 👉 Client-Focused Approach to align with your business goals 👉 High-Quality Work, attention to detail, and deadline compliance 👉 Ongoing Learning to stay updated with the latest trends in web and mobile development ⭐ Services Offered 👉 WordPress Development: Full-site builds, migrations, and upgrades 👉 Shopify Store Setup: Custom themes, product uploads, and optimizations 👉 Webflow Website Design: Custom UI/UX and responsive solutions 👉 WooCommerce Solutions: Custom product pages, checkout, and payment integration 👉 App Development: Flutter cross-platform apps for mobile devices 👉 Bug Fixing: Resolving website and app issues 👉 Plugin Development: Custom plugin creation and tweaks 👉 Theme Customization: Tailored branding and responsive layouts 👉 Speed Optimization: Performance audits and load time improvements ⭐ Let's Connect! If you are looking for a skilled and reliable web developer and app developer who can bring your vision to life, look no further. Contact me today to discuss your project and discover how my expertise in WordPress, Shopify, Webflow, App Development, Bug Fixing, Theme Customization, and Speed Optimization can help you achieve your business goals. Let’s work together to create something amazing!
    Featured Skill Kotlin
    API
    Web Development
    Web Design
    Bug Fix
    Theme Customization
    iOS Development
    Figma
    Webflow
    SEO Content
    Shopify
    WordPress
    Rapid Application Development
    Web Application Development
    CMS Development
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