Mobile Engineer - Android in London

LemFi (Series B) is building the go-to financial app for the Global South. Moving to a new country shouldn’t mean starting from zero. That’s why our team of 400+ spanning 20+ countries is building a financial ecosystem that helps immigrants stay connected to home, build stability, and create wealth regardless of where they are from or where they live. What began as fast, affordable remittances is now evolving into a complete platform for multi-currency accounts, payments, credit, and long-term financial growth. With over 2 million users across the globe, we process over $1.5B in monthly transactions to 30+ countries, proving that borders shouldn’t limit financial opportunity.

The Role

As a Mobile Engineer, you will build and evolve mobile experiences used by customers across the world. You’ll design and deliver high-quality, secure, and performant Android applications that power a fast-growing fintech platform. This is a hands-on, high-impact role. You’ll work closely with Product, Design, Backend, and other Mobile Engineers to ship polished features, improve reliability and performance, and help shape the future of our Android architecture in a collaborative startup environment.

How You’ll Contribute

• Build High-Quality Apps: Design and develop scalable, secure, and maintainable Android applications using Kotlin.
• Deliver Exceptional UX: Collaborate with Product and Design to implement intuitive, responsive, and accessible user interfaces.
• Ensure Code Quality: Write clean, testable code, participate in code reviews, and uphold strong engineering standards.
• Optimise Performance: Debug, profile, and continuously improve application performance, stability, and responsiveness.
• Integrate Systems: Work with internal services and external APIs to deliver reliable, end-to-end mobile features.
• Support Team Growth: Contribute to technical discussions, share best practices, and support the growth of the mobile engineering team.

Who You Are

• User-Focused: You care deeply about delivering smooth, reliable, and intuitive mobile experiences.
• Technically Strong: You bring solid Android fundamentals and hands-on experience building production-grade apps.
• Collaborative: You enjoy working cross-functionally with engineers, designers, and product managers.
• Ownership-Driven: You take responsibility across the full development lifecycle, from design to release.
• Continuous Learner: You stay current with Android frameworks, architectural patterns, and emerging technologies.

What You’ll Bring

• Strong experience building Android applications using Kotlin.
• Deep knowledge of Android SDK, UI principles, and best practices.
• Experience with modern Android architecture patterns (e.g. MVVM, Clean Architecture).
• Hands-on experience integrating RESTful APIs and working with JSON.
• Familiarity with third-party libraries and Android tooling.
• Understanding of the full mobile development lifecycle, including testing and release.
• Experience publishing and maintaining Android apps in the Play Store.

The Interview Process

• Chat with a Talent Partner (30 mins)
• Behaviours & Culture (30 mins)
• Take-home assignment OR Paired Programming (60 mins), System Design (30 mins)
• Final Interview (30 mins)

Why Join LemFi?

Love shouldn’t be expensive, yet those working hardest for their families often face predatory fees and banking exclusion. We’re changing this. At LemFi, you won’t be just a cog in a machine. Whether designing products, scaling operations, or telling our story, you’ll tackle complex challenges with real, immediate impact. Your work goes beyond metrics - it puts money back in families’ pockets and offers access to the previously excluded. Join us to make a meaningful difference, where high performance is a lifeline for millions.

Our Values: How We Win

• Sharp Customer Focus: We cut through the noise and prioritise ruthlessly based on what drives real value.
• Lead with Data: We trade instinct for insight. We test, analyse, and own the outcomes.
• Ownership: We take responsibility for global outcomes, not just local wins.
• Grit: We navigate ambiguity with resilience and keep pushing until the customer feels the impact.

Diversity & Inclusion at LemFi

To build the best financial tools for the global diaspora, we need a team that reflects the world we serve. We welcome builders from all walks of life who embody our values over a perfect resume. Don’t meet every single requirement in the job ad? Research shows that candidates from underrepresented backgrounds often hesitate to apply if they don’t check every box. If you are excited about this role and our mission, we encourage you to apply anyway. You might be just the right person for this, or other roles.