Enjoy building mobile products and getting involved in the backend that powers them?

I’m looking for a Mobile / Full Stack Engineer who combines strong React Native experience with hands-on backend development. You’ll work across iOS and Android applications, APIs and backend services, making practical technical decisions that turn business needs into reliable software.

What you’ll be doing

- Build and evolve production mobile applications using React Native and TypeScript .
- Develop and integrate REST APIs and backend services , ideally using C#/.NET .
- Improve application reliability through unit and integration testing.
- Contribute to architecture discussions, balancing maintainability with timely delivery.
- Explain technical choices, discuss trade-offs and provide realistic estimates.
- Help improve the development workflow and the quality of each release.

What we’re looking for
- At least 3-4 years of hands-on React Native and TypeScript experience , delivering applications used in production on both iOS and Android.
- Experience building backend services and APIs, beyond integrating them into a mobile app. C#/.NET experience is preferred .




- Practical knowledge of automated testing, using tools such as Jest and xUnit/NUnit .
- A pragmatic approach to engineering: you know when to invest in extensibility and when to keep things simple.
- Confidence communicating technical decisions and contributing constructively to team discussions.

It would be great if you also bring
- Event-driven architecture and messaging experience with NATS, Kafka or RabbitMQ .
- Exposure to Docker, Kubernetes, cloud environments or Infrastructure as Code .
- Familiarity with Azure DevOps, GitHub Actions or Fastlane .
- Experience working with shared component libraries and design systems.
- Knowledge of observability tools such as Prometheus and Grafana .
- Confidence using Xcode and Android Studio , including native integrations and React Native’s native bridge or NitroModules.

Interested? Send me your CV or drop me a message. I’d love to hear about the mobile products you’ve built and how much you enjoy working across the backend too.

📌 React Native Engineer | Backend C#/.NET (Barcelona)
🏢 Lawrence Harvey
📍 Barcelona