Senior Mobile Engineer (React Native)
Ebury
- Location
- United Kingdom
- Job Type
- full-time
- Salary
- Unknown
- Posted
- July 18, 2025
Job Description
Senior Fullstack Mobile Engineer (React Native)
London Office - Hybrid: 4 days in the office, 1 day working from home
Ebury is seeking a Senior Full Stack Mobile Engineer skilled in React Native to play a crucial part in our Channels Core team. In this role, you will be working on evolving our mobile app for the scale Ebury wants to operate in by developing tooling and processes to empower Ebury product teams to ship amazing features efficiently and independently while maintaining a unified, usable experience for our customers.
We’re looking for the right attitude, work ethic, and entrepreneurial spirit to ask the hard questions. To be informed by data, but be led by a desire to solve our customers' problems. You should learn by default and be ever curious. You should be programming language, framework, and tool agnostic, but have strong opinions (weakly held) on the right tool to solve our biggest problems.
What we offer:
- Competitive salary and benefits package.
- Discretionary bonus based on performance.
- Continued personal development through training and certification.
- We are open-source friendly, following open-source principles in our internal projects and encouraging contributions to external projects.
Responsibilities:
- React Native Mobile App Ownership: Oversee the app's entire lifecycle—design, development, testing, deployment, and maintenance.
- Collaborate with your team members, other engineers, product owners, data teams, and design to get the job done.
- In line with our 'You build it, you own it' philosophy, we expect you to take full ownership of the products you build, embracing both their development and ongoing maintenance.
- You care about providing a great experience to our customers and are driven to understand their needs and issues and how you can best address them.
- You have experience in developing complex web applications. We mainly work with Python/Django & Node.js, but experience in any other modern language and frameworks is ok.
- Since you will work side by side with colleagues from different countries, you will be able to communicate ideas clearly and concisely in English, both written and spoken
- We use Expo pipelines for the deployment of services and infrastructure. From time to time, you might need to contribute to it.
- You are adept at both constructing and managing services. As such, you should have proficiency in establishing standard APIs, incorporating monitoring systems and alerting services, along with a strong expertise in integrating external systems.
- Quality is important to us; we expect your code to be testable with good test coverage.
- Keep up-to-date with emerging technologies, tools, and practices.
- The position may require being on-call at times.
About you:
- 5+ years of software development experience, including 3+ years with React Native & TypeScript.
- Experience with Python3, Django, PostgreSQL, Redis, Rest APIs, or similar modern programming languages and frameworks.
- Familiarity with RESTful APIs to connect mobile applications to back-end services.
- Proficient understanding of code versioning tools, such as Git.
- You take ownership of code quality, ensuring your work is testable and well covered with unit and integration tests.
- Knowledge of Linux systems, cloud infrastructure, networking, and databases.
- Strong communication and collaboration skills.
About Us
Ebury is a FinTech success story, positioned among the fastest-growing international companies in its sector.
Founded in 2009, we are headquartered in London and have more than 1700 staff with a presence in more than 29 markets worldwide. Cultural diversity is part of what makes Ebury a special place to be. From Sao Paulo to Dubai, Vancouver to Auckland, we enjoy sharing team experiences and celebrating success across the Ebury family.
Hard work pays off: in 2019, Ebury received a £350 million investment from Banco Santander and has won internationally recognised awards including Financial Times: 1000 Europe's Fastest-Growing Companies.
None of this would have been possible without our proudest achievement: our great people. Enthusiastic, innovative and collaborative teams, always ready to disrupt and revolutionise the fast-paced FinTech sector.
At Ebury, we’re committed to building a workplace where everyone feels valued, supported, and empowered to thrive. We’re proud to have active employee networks and ESG initiatives that reflect our inclusive culture, including our Women’s Network, LGBTQIA+ Network, and Veterans Network. These communities provide spaces for connection, mentorship, advocacy, and collaboration across our global teams.
We believe in inclusion. We stand against discrimination in all forms and have no tolerance for the intolerance of differences that makes us a modern and successful organisation. At Ebury, you can be whoever you want to be and still feel a sense of belonging no matter your story because we want you and your uniqueness to help write our future.
Please submit your application on the careers website directly, uploading your CV / resume in English.
π― Who is this job for?
This role is ideal for a Senior Mobile Engineer with 5+ years of development experience, including 3+ years using React Native and TypeScript to build scalable apps. Candidates should also be familiar with backend technologies like Python/Django, PostgreSQL, and RESTful APIs, and comfortable working in hybrid cloud environments. It's suited for developers who take full ownership of product lifecycle, enjoy cross-functional collaboration, and thrive in fast-paced fintech settings.
π¬ Potential Interview Questions
-
Describe your experience with React Native and TypeScript in building mobile applications.
I have 3+ years of professional experience developing scalable React Native apps using TypeScript, focusing on modular, maintainable codebases and smooth user experiences. -
How do you approach full ownership of a mobile app’s lifecycle from development to maintenance?
I take responsibility for designing, coding, testing, deploying, and maintaining features, ensuring stability, performance, and user satisfaction while iterating based on user feedback. -
Explain how you integrate React Native apps with RESTful APIs and backend services like Django or Node.js.
I use fetch or Axios to communicate with RESTful endpoints, handle authentication tokens securely, manage error states, and optimize data fetching to maintain a responsive UI. -
What testing strategies do you employ to ensure code quality in React Native applications?
I implement unit tests using Jest, integration tests with React Native Testing Library, and end-to-end tests with Detox or similar tools, ensuring comprehensive coverage and regression prevention. -
How do you stay current with emerging mobile development tools, frameworks, and best practices?
I regularly read industry blogs, attend webinars, participate in developer communities, and experiment with new technologies in side projects to continuously improve my skills. -
Describe your experience with Expo pipelines for deploying React Native applications.
I have contributed to CI/CD pipelines using Expo for automated builds, testing, and deployments, ensuring smooth rollouts and quick iteration cycles. -
How do you ensure seamless collaboration with cross-functional teams (product owners, designers, data teams)?
I maintain clear communication, participate actively in sprint planning and reviews, align on requirements, and use collaborative tools like Jira and Slack to synchronize efforts. -
What approaches do you use to build performant and user-friendly React Native apps at scale?
I optimize rendering with PureComponent, memoization, lazy loading, reduce unnecessary re-renders, and monitor performance using profiling tools like Flipper. -
How do you manage cloud infrastructure and monitoring for mobile backend services?
I configure standard REST APIs, integrate monitoring tools (like Sentry), set up alerts for service health, and ensure reliable deployment through automated pipelines. -
What do you consider when debugging complex issues in mobile applications?
I analyze logs and stack traces, reproduce issues on different devices, use debugging tools like React DevTools and Flipper, and collaborate with backend and QA teams for root cause analysis.
π Job Summary
Join Ebury as a Senior Fullstack Mobile Engineer (React Native) in London (hybrid: 4 days onsite, 1 remote). You'll lead the development and maintenance of a scalable mobile app, working closely with cross-functional teams to deliver seamless, customer-focused features. We value strong ownership, entrepreneurial spirit, and curiosity, with a tech stack including React Native, TypeScript, Python/Django, Node.js, and REST APIs. Enjoy a competitive salary, bonus, personal development, and an open-source friendly culture.
If you have 5+ years in software development, 3+ years with React Native & TypeScript, backend experience, and strong communication skills, this is your chance to shape cross-border fintech solutions at a fast-growing global company.