Hire the Best Kotlin Developers
in Thailand

I run an indie portfolio of 11 mobile apps with 300K+ users and 4.8-star average ratings. On Upwork I've earned $400K+ across 15 long-term contracts. 9+ years shipping native iOS, native Android, and Flutter. I took a break from Upwork to focus full-time on my own app portfolio, and I'm back taking contract work part-time, 15-20 hours a week. Most of my Upwork clients have come back for second and third projects. What I work with: - Native Android (Kotlin/Java) and iOS (Swift/SwiftUI/UIKit) - Flutter and React Native for cross-platform - Firebase, Supabase (backend, analytics, push notifications) - Subscriptions and payments (RevenueCat, StoreKit, Google Play Billing) - Backend when needed (Python, .NET, Go) - CI/CD and testing What sets me apart from most contractors here is product thinking. I run 11 of my own subscription apps in production, so I can tell you which features will actually move your metrics and which will waste your budget. Subscriptions, monetization, ASO, retention, analytics, localization. I run this experiment every week on my own portfolio, so I'm not guessing when I work on yours. If you need a mobile app built, fixed, or taken to the next level, let's talk.

Software engineer with 4 years of experience in mobile applications, backend development, and web applications for both development and maintenance. Adaptable to Agile and Scrum methodologies, with hands-on experience in pair programming and mob programming. Strong teamwork and collaboration skills, actively engaging in discussions with developers and cross-functional teams to drive effective solutions. Enthusiastic about continuous learning, constantly exploring new technologies, tools, and best practices to enhance software quality and development efficiency. Able to adapt and work effectively with new team members, fostering a collaborative and inclusive work environment. SKI LLS • Spring Boot • RESTful API • Go • Kotlin • Android Studio • Flutter • MongoDB • Redis • Docker • Java • JavaScript • TypeScript • React • Vue • Git • Git Hub Action • Jenkins • Agile/Scrum • Communication • Teamwork & Collaboration • Critical Thinking

12 years building production .NET systems. Fintech payment orchestration at Agoda, SaaS invoicing platforms, legacy modernization on Azure and AWS. My work is backend-heavy full-stack. Clean C# architecture, REST APIs built to hold up under real load, and frontends in Blazor or React that don't embarrass the backend. I've owned entire codebases solo and led small teams through complex deliverables. I'm most useful when a project is messy, stalled, or needs someone who can hit the ground running without hand-holding. Done this repeatedly on Upwork and in enterprise environments. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ⚙ Backend: .NET Core | ASP.NET Web API | EF Core | C# 🖥 Frontend: Blazor WASM | React | Redux | Angular | TypeScript 🗄 Databases: SQL Server | PostgreSQL | Redis ☁ Cloud: Azure | AWS | Azure DevOps | GitLab CI 🔗 Integrations: Stripe | Xero | FreeAgent | HMRC | Amadeus | FedEx | DHL ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ If your project involves .NET, a data-heavy backend, or anything in fintech or SaaS, let's talk.

I am an Experienced Mobile Developer with 8 years in the industry and proficient with Flutter, Kotlin, C#, Java. I have been passionate about mobile development with Latest technology and Programming standards. I have solid experience in troubleshooting and problem solving. I am a great team player and passionate about learning new skills and challenges.

I help Android apps go live faster by resolving release blockers and Play Console issues. I focus on fixing build errors, policy rejections, and technical issues that prevent apps from reaching production. I can quickly diagnose and resolve: • Gradle build failures • AAB / APK signing & keystore problems • Version code & dependency conflicts • Play Console policy rejections • Firebase integration errors • Crash debugging & performance issues If your app is stuck before release, I identify the root cause and deliver a clean, production-ready solution. Clear communication. Fast turnaround. Reliable results. Send me the error log or Play Console screenshot, and I’ll quickly assess the issue and outline the best path to resolution.

Experienced Android developer with 6 years of experience, familiar with the whole process of app development, can work both on new projects as well as adapting existing complex code bases or debugging and fixing bugs. **My Skills** - Kotlin, Java, KMM, KMP - RxJava, Coroutines - Jetpack Compose, Flow, LiveData, Navigation, Pagination, etc (Android Architecture Component) - MVVM, MVP, MVC (Application Architectural pattern) - Retrofit, Ktor (Network call) - Junit, Robolectric, Mockito, Espresso - (Unit & UI Automation) -. Hilt, Koin, Dagger 2 (Dependency Injection) - Room, ORMLite, Realm (Database management) - Fabric, Google Analytics, NewRelic (Analytics) - Google, Facebook, Twitter (Social Media SDKs) - Figma, Zeplin, InVision, Sketch, Photoshop (Pixel perfect UI) - GitHub, Bitbucket. (Code management) - JIRA, Trello, Slack, Microsoft teams, Google Chat (Task management and communication) - Good Analytical and problem solving skills. - Google Play store. **Worked Area** Having product development experience and worked in Banking, FinTech, Telecom, E-commerce, Logistic and Social Media industries.