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Senior Full-Stack Flutter Engineer

5+ yearsFull-timeRemote
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We are looking for a Senior Full-Stack Engineer with a strong Flutter background who can own features end to end: the mobile app, the backend behind it and the web dashboard around it.

What is the role about?

You will work in an international team with engineers from Ukraine and specialists on the client side, building the mobile app, the backend services behind it and the web dashboards around it.

How many interview stages are there?

  1. HR interview
  2. Technical interview
  3. Sync with the Solution Architect
  4. Interview with the client

Requirements and responsibilities

What you will do

  • Build and maintain high-quality cross-platform apps for iOS and Android with Flutter
  • Design, build and maintain backend services, APIs and databases
  • Develop dashboards, admin panels and client-facing web apps
  • Integrate native Android and iOS features
  • Review code and set engineering best practices

Technical skills

  • Mobile (Flutter): Dart, Flutter, Bloc, RxDart, Streams, Freezed, json_serializable, Platform Channels
  • Native Android: Kotlin, Java, Jetpack, MVVM/MVP/MVC, Retrofit 2, RxJava2, Room, Realm, OrmLite
  • Native iOS: Swift, CoreLocation
  • Mobile features: Material Design, Google Maps, geolocation, background tasks, Bluetooth, NFC, QR scanning, deep links
  • Push notifications: Firebase Cloud Messaging, APNs, OneSignal
  • Backend: Node.js, TypeScript, NestJS, Express, REST, GraphQL (Apollo), WebSockets
  • Web frontend: React, Next.js, TypeScript, Redux Toolkit, Zustand, React Query

General

  • 5+ years of commercial software development experience
  • Experience delivering products across mobile, backend and web
  • Upper-Intermediate English or higher
  • LLM integration experience (OpenAI, Anthropic, LangChain) or RAG
  • Daily use of AI-assisted development tools (Cursor, Claude Code)

Mobile (Flutter)

  • 4+ years with Flutter and Dart, with apps you have shipped to the App Store and Google Play
  • Strong experience with Bloc and reactive programming (Streams, RxDart)
  • Clean Architecture and code generation (Freezed, json_serializable)
  • Native integration through Platform Channels, with solid Kotlin or Swift knowledge
  • Push notifications (FCM, APNs or OneSignal), deep links and background tasks
  • Local storage and offline-first apps (SQLite, Drift or similar)
  • Unit, widget and integration testing

Backend

  • 3+ years building backend services with Node.js and TypeScript (NestJS or Express)
  • API design with REST and GraphQL, plus real-time communication through WebSockets
  • Strong PostgreSQL skills: schema design, query optimization, indexing, migrations
  • Redis for caching, pub/sub and queues
  • Experience with NoSQL databases (Firestore, DynamoDB or MongoDB)
  • Authentication and authorization (JWT, OAuth, Firebase Auth or Cognito)
  • Background jobs and message queues (SQS, Kafka, BullMQ or similar)
  • Backend testing with Jest or similar

Frontend (web)

  • 2+ years with React and TypeScript
  • Next.js (SSR, routing, API routes)
  • State and data management (Redux Toolkit, Zustand or React Query)
  • Responsive, mobile-first layouts
  • Building dashboards, including real-time data visualization

Nice to have

  • AWS or Firebase/Google Cloud
  • Docker and CI/CD (GitHub Actions, Codemagic or Fastlane)
  • Background location tracking, geolocation services and Google Maps
  • Bluetooth, NFC or QR scanning integrations
  • A background in native Android development (Kotlin, Jetpack)
  • Microservice architecture and high-load systems (millions of records, zero-downtime migrations)
  • Infrastructure as Code (CloudFormation, Terraform)
  • Dart on the backend (Serverpod, Dart Frog)
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