Build React Native identity-verification and onboarding experiences using JavaScript/TypeScript, component architecture, state management, and CI/CD pipelines. The identity engineering team owns the customer-facing front door of Zepz’s cross-border remittance platform, handling millions of users’ first contact and security checks.

You'll work primarily with TypeScript, Node.js, and PostgreSQL on GCP, designing and building scalable backend systems. The team develops and maintains a robust investment platform that powers features like mutual funds, bonds, and family investment tools.

You'll work with Java, AWS, GCP, Kubernetes (EKS), TeamCity, Terraform, Grafana, and microservice architecture to build Engine’s SaaS banking platform for financial institutions. As a Staff Engineer, you lead and mentor a high-performing engineering team, driving complex projects from inception to delivery.

Work with Java, AWS/GCP, Kubernetes (EKS), TeamCity, Terraform and Grafana on Engine's cloud-native microservice-based banking platform. The team builds the SaaS technology that powers Starling Bank, enabling banks worldwide. As Staff Engineer, you coach and lead a high-performing engineering team.

Native Kotlin and Jetpack Compose development on a consumer-facing Android app for in-store grocery trips, running on a known device inside live stores. Integrates on-device edge AI (ML Kit, TensorFlow Lite) and uses AI coding tools like Cursor or Claude Code. Reports to the Head of Android.

Lead development of cross-platform mobile apps using React Native (Expo preferred), Dart, JavaScript/TypeScript, Git, and CI/CD. The team builds warpSpeed’s AI-powered productivity platform, delivering native iOS and Android experiences.

You will work with React, TypeScript, and frontend engineering to build AI-native interfaces across web and mobile. The team is creating a proactive smart assistant that handles multi-step reasoning, persistent context, and real-world task completion.

You'll work with React, React Native, Node.js/TypeScript, SQL, and APIs. The company is building AI-powered infrastructure for the B2B secondhand clothing trade, grading, pricing, and categorizing items from photos. As a senior full stack engineer with a frontend lean, you'll own end-to-end user-facing features across web and mobile.

TypeScript, React/React Native, Kotlin Multiplatform, Hono, Postgres, Pulumi/SST, Docker, AWS, and Kamailio. You will build and scale the world’s first safe mobile platform, combining network-level controls, device-integrated software, and AI-powered risk detection for children.

Build Android features using Kotlin, Jetpack Compose, Android SDK, Coroutines, Flow, SQL/NoSQL, TensorFlow Lite, and REST APIs for BJAK’s AI Finance Agent. You will own clean mobile flows for insurance, payments, claims, renewals, and financial services, integrating backend APIs and improving app performance, crash rate, and memory usage.

You will architect and ship a greenfield React Native (TypeScript) B2B application for iOS and Android, integrating with Ruby on Rails APIs, and own CI/CD, testing, and release foundations. This role builds a passenger assistance platform that turns assistance requests into coordinated action inside live rail operations. You will establish the mobile roadmap in a high-autonomy, small-team setting.

React Native Architect role at MrQ, an online casino, owning mobile architecture for iOS and Android apps. Will work with React Native, TypeScript, JavaScript (ES6+), native modules (Swift, Objective-C, Java, Kotlin), Redux/MobX/Recoil, RESTful APIs, and CI/CD pipelines. Responsibilities include mentoring engineers and driving scalability and performance.

You will use Figma, FigJam, Auto Layout, interactive prototyping, iOS Human Interface Guidelines, and Material Design. You will design beautiful, intuitive mobile interfaces for BJAK’s financial products—insurance, payments, investments, and more—working alongside engineers and product managers to create experiences used by millions.

You’ll work with TypeScript or Python, Appium, Playwright, and CI/CD pipelines to build and maintain automated test suites for web and mobile. The Consumer Growth team delivers content—podcasts, radio, video—across Global Player on mobile, smart TV, and in-car platforms. You’ll lead a team of QA Engineers and own the quality strategy for these consumer-facing products.

Koinly★3.0 (1)· London

Work with React 19, TypeScript, TanStack (Router, Query, Table), Radix UI, Mantine, Tailwind CSS v4, Vite, Vitest, Storybook, Highcharts, Sentry, Bun, and RabbitMQ on a data platform that reconciles crypto transactions and tax obligations for Koinly’s web application, with a React Native mobile app joining scope later.

Build Android fitness app features with React Native and Expo, using Claude for AI-assisted development and agentic workflows. 1-month contract fully remote.

Koinly★3.0 (1)· London

You'll work with React 19, TypeScript, TanStack, Radix UI, Mantine, Tailwind CSS v4, Vite, Vitest, Storybook, RabbitMQ, and Redis on a data platform that helps crypto investors reconcile transactions and file taxes. Koinly is a crypto tax calculator used by investors across chains, wallets, exchanges, and DeFi protocols.

Build and maintain the company’s platforms using JavaScript, Node.js, Next.js, Express.js, React/React Native, .Net 4.8/9/10, C#, HTML/CSS, and API Restful Services. You will develop both web and mobile applications, collaborating with the team while working independently.

Work with TypeScript, React, and React Native to build end-to-end features for a mobile-first consumer tech product that has millions of engaged users globally.

the LEGO Group★4.1 (610)· London

You will develop cross-platform mobile apps using Unity, Flutter, React Native, or Kotlin Multiplatform and maintain legacy Unity applications. This role drives architecture and engineering practices for LEGO’s digital play experiences. You help ensure strong mobile engineering as a foundational capability across the portfolio.

Starling★3.5 (66)· London

Work with Swift (iOS) and Kotlin/Java (Android), native mobile security APIs and cryptography, and public cloud IaaS. You will design, build, and maintain security controls for the company’s Android and iOS mobile banking applications as part of the Cyber Security team.

Lead greenfield React Native (TypeScript) development for iOS and Android, working with a Ruby on Rails backend team to architect the mobile platform and define CI/CD, testing, and API integrations. You own end-to-end delivery of a new cross-platform app for a tech-for-good SaaS company relied on by hundreds of thousands of users.

Swift, SwiftUI, Structured Concurrency, MVP/MVVM/VIPER, REST APIs, and CI/CD (GitHub Actions). You’ll join the Account Mobile team driving the Wise app’s homepage and features that help users manage cross-currency money, collaborating with product, design, and analytics—alongside 60+ other mobile engineers.

The head of engineering will lead architecture across mobile, web, backend, hardware integration, and AI platforms, using event-driven systems, data platforms, and AI/ML. The multidisciplinary team of ~25 engineers builds and scales these software, hardware, and AI systems.

You will lead mobile development for the BUSY App across iOS, Android, macOS, watchOS, and Wear OS, using Swift, Kotlin, and Apple/Android ecosystems, with BLE and hardware communication as nice-to-haves. Your team builds the BUSY ecosystem—a cross-platform productivity app paired with the BUSY Bar smart multi-tool—at Flipper Devices, creator of Flipper Zero.