Job Openings at LemFi (Formerly Lemonade Finance)

The Role

• You will be the technical engine behind LemFi’s Remittance Platform, a system that processes tens of millions of cross-border transactions every month. As a Staff Engineer, you aren’t just writing code; you are driving the architectural strategy that allows immigrants around the world to send money home safely and efficiently. You will tackle the most complex system challenges end-to-end, setting the benchmark for technical quality across the entire engineering organisation.

How You'll Contribute

• Drive Technical Strategy: Guide architectural decisions from concept to production across multiple teams, ensuring our systems are scalable and well-informed.
• Establish Excellence: Set and uphold benchmarks for design, implementation, testing, reliability, and scalability across the organisation.
• Own Critical Components: Take hands-on ownership of high-stakes system components to set a gold standard for the team by example.
• Mentor and Amplify: Provide technical guidance to engineers and leads, removing blockers and bringing clarity to ambiguous challenges through strong communication.
• Collaborate Strategically: Partner with Product, Data, and Growth stakeholders to align our technical roadmap with broader company priorities.
• Evolve Standards: Shape company-wide engineering standards, continuously improving tooling and processes for long-term impact.

Who You Are

• Impact-Driven: You prioritize meaningful business and user outcomes over technical output alone.
• Influential Without Authority: You lead through mentorship and example, aligning stakeholders across teams without relying on an organizational chart.
• A Pragmatic Builder: You enjoy getting deep into the stack to understand trade-offs and deliver solutions that move the needle.
• AI-Native Mindset: You are actively exploring how AI can enhance engineering productivity and unlock new ways to solve problems.
• Growth-Oriented: You are naturally curious and eager to learn areas beyond your core expertise, from machine learning to emerging technologies.

What You'll Bring

• 7+ years of experience building scalable, production-grade distributed systems.
• Deep Go Lang Expertise: Extensive hands-on experience using Go for building distributed services.
• System Design Mastery: Proven track record in Domain-Driven Design (DDD), modular architecture, and evolving RESTful APIs.
• Advanced Infrastructure Knowledge: Proficiency with PostgreSQL (optimization and transaction handling), Redis, and async patterns like Kafka.
• Cloud & DevOps Savvy: Ability to translate requirements into secure, cost-efficient AWS architectures using Docker and shift-left automation.
• Observability Focus: Deep experience in establishing logging, metrics, and distributed tracing standards.
• Bonus: A degree in Computer Science or previous experience in the FinTech/Banking domain.

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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.