Mobile / Desktop Platform Engineer

HaikoTek is hiring for our client. You will help ship mobile and desktop clients that share logic across phones, tablets, and desktops — thin UI shells, hard work in a shared core when that pays off.

This is a six-month, hands-on contract. You will write code every week and leave the next engineer a clear path to follow.

• —Design and implement shared cores (Kotlin Multiplatform, Rust + FFI, or a mix) behind thin UI shells
• —Ship features on Jetpack Compose, SwiftUI, React Native, and/or a desktop toolkit when the product needs it
• —Keep local data honest: SQLite, migrations, and offline-friendly habits
• —Wire clients to REST APIs; add WebSocket or similar when live updates matter
• —Work with GraphQL or provider graph APIs with clear auth, retry, and failure rules
• —Strengthen CI/CD: PR checks, multi-platform builds, release artifacts, and smoke tests
• —Pair with backend and architecture when contracts change; leave short, useful notes
• —Shape light AI features on device or through APIs when they solve a real need

You do not need every line below at expert level. You need enough breadth to own a client platform end to end.

• —You have shipped production mobile and/or desktop apps, not only prototypes
• —You have worked with a shared core or multi-platform setup (KMP, Rust FFI, RN native modules, or similar)
• —You are strong on CI/CD for client platforms — builds that fail fast and releases you trust
• —You integrate REST APIs cleanly and have shipped socket / realtime features
• —You have used GraphQL or a provider graph API in a real product
• —You write and speak fluent English in PRs, docs, and calls
• —You leave code and contracts clear enough for the next engineer

• —Practical AI on clients or via model APIs (on-device ONNX, assist features, careful privacy)
• —Deep React Native New Architecture / TurboModules experience
• —Qt or other desktop UI toolkits
• —Crypto / secure storage / biometric unlock on mobile or desktop
• —Prior contractor work with a small product team

• —Contract · about 6 months (extension possible if both sides want it)
• —Senior / platform level · hands-on
• —Hybrid or remote with strong overlap for Vietnam / SEA daytime (ICT)
• —Hourly or day-rate, by experience — tell us what you need

Use the application form below. Include LinkedIn and GitHub (or similar), a short note on one mobile or desktop platform you owned, your preferred rate, your start date, and confirmation that you can work in fluent English.