Join Kraken's Business Services Support Center as a Senior Software Engineer focused on React Native and TypeScript. You'll develop and maintain mobile support-related functionality (in-product messaging, chat, content, banners, modals, voice calls), work with product/design/backend teams, contribute to real-time experiences using APIs and WebSockets, and help improve shared architecture and mobile release processes. Requires 5+ years of software development experience and strong English communication.

Kraken seeks a Senior React Native Engineer to build and ship production mobile experiences for the Kraken app. The role requires strong React Native experience, end-to-end ownership of features (discovery through iteration), working with APIs and real-time data, making architecture and performance decisions, and close collaboration with Product and Design. Nice-to-haves include fintech/crypto experience, real-time interfaces, web/mobile breadth, and native Swift or Kotlin experience.

Netguru seeks a React Native Developer with strong React Native and TypeScript experience, familiarity with React Navigation, shared state/data-fetching solutions, consumption of design system component libraries, and testing with Jest and React Native Testing Library. Knowledge of push notifications, deep linking, and device APIs required. 100% remote, full-time freelance role; English min B2+. Start around mid October 2026; project duration 1 month.

Join Kraken's Consumer engineering team to deliver cross-platform web and mobile experiences using React, React Native and TypeScript. Responsibilities include end-to-end ownership from discovery to production monitoring, driving A/B testing and experimentation, making architecture decisions (Next.js, React Server Components), mentoring engineers, and using AI-assisted development tools. Requires 6+ years experience and strong English communication.

Freelance Senior Android Developer role working remotely (Warsaw-based office optional). Responsibilities include designing, building and maintaining Android apps that communicate with hardware over BLE, writing Kotlin, using Jetpack Compose, applying unit testing/TDD, reviewing code, and using AI tools in the workflow. Initial freelance/time & material engagement (paid by hours); potential path to permanent contract and benefits after ~3 months. English (B2+) required.

Freelance Senior Flutter Developer to deliver cross-platform Flutter apps that interact with firmware and physical devices via BLE (experience with flutter_blue_plus preferred). Fully remote (Warsaw office & Gdansk cowork optional), paid on B2B hourly basis (90–180 PLN/h). Path to permanent contract possible after initial 3 months. Role requires commercial Flutter and Dart experience, platform debugging (iOS/Android), and strong problem-solving and collaboration skills.

Freelance Senior iOS Developer role (fully remote, Warsaw office available). Paid hourly B2B (90–180 PLN/h). Responsibilities: build and maintain iOS apps communicating with BLE hardware, write unit tests (XCTest/Quick/Nimble) with a TDD mindset, maintain CI/CD (GitHub Actions/Bitrise/Travis), review PRs, and collaborate with firmware, design, QA, and PMs. Path to permanent contract possible after initial 3 months.

Join as a freelance Mobile Developer owning the mobile side of connected-product projects (wearables, sensors, health-tech). Design and implement robust BLE communication flows, debug device interactions, and work alongside firmware, backend, design, QA and PMs. Role is fully remote (optional Warsaw/Gdansk offices), paid 90–180 PLN/h B2B, with a path to a permanent contract after a successful initial 3-month period. Recruitment and day-to-day work in English (B2+).

Responsible for the motion and interaction layer of the Kraken mobile app (React Native). Work includes building and evolving animated components and motion tokens, profiling and optimising rendering performance (especially on lower-end Android), bridging to native when needed, and partnering with product designers to ship refined motion and interaction experiences.

Planner 5D seeks an Android Team Lead with 7+ years of Android experience to own Android development, make technical decisions, mentor developers, and implement complex features (graphics, multiplayer, AI, CRDT). Required skills include Kotlin, Java, Jetpack, Dagger, Coroutines/RxJava, Room/SQLite, REST/Protobuf, testing, and in-app payments. Locations listed include several European cities and Poland.