Senior Software Engineer - Foundations

About the role

Ambition has no passport. That belief is why LemFi https://lemfi.com/en-gb/careers exists. We're the financial engine for people the world wasn't built to serve, the millions who move countries to build something better and find the financial system hasn't caught up with them yet. We started with remittances: the money people send home to the people they love. Now we run multi-currency accounts, Savings, eSIMs and Credit. Because staying connected to home and building somewhere new are not two separate things. They never were.

ABOUT THE ROLE

LemFi's Foundations tribe is the platform backbone every product team relies on. We own onboarding and identity (KYC end-to-end), engagement systems (rewards, CRM tooling, Lemfi cash), and the internal SDKs and architectural standards that let other squads move fast without reinventing the wheel. If it touches how a customer gets onto the platform or how teams build reliably on top of it, it runs through us. We are looking for a Senior Backend Engineer who is at home in Go, cares deeply about building things that last, and has the ownership instinct to drive a system from design to production with minimal hand-holding. You will be a key technical voice in the tribe - setting standards, shipping real product, and enabling the rest of engineering to move faster because of the work you do.

WHAT YOU'LL BUILD AND OWN

- Own and evolve our core identity and onboarding services - KYC flows, verification orchestration and the data contracts that downstream systems depend on.

- Build and maintain internal SDKs and shared libraries that abstract platform concerns (auth, identity, caching, eventing) so product teams can move without friction.

- Define and champion cross-platform architectural standards, making opinionated decisions about service design, API contracts and data consistency that the wider engineering org follows.

- Drive engagement platform capabilities - rewards logic, CRM integrations and Lemfi cash - from spec to production, using AI-assisted development tooling to compress iteration cycles without sacrificing correctness.

- Partner closely with platform and infrastructure teams to raise the reliability and observability bar across Foundations-owned services.

- Tackle the hard, ambiguous problems - new country launches, regulatory identity requirements, scaling events - and turn them into clean, well-documented solutions.

- Contribute to a high-ownership engineering culture: code reviews, architectural reviews, incident response and mentoring are part of the job, not extras.

YOUR EXPERIENCE

- At least five years of backend engineering experience with Go as your primary language in a production environment.

- A track record of building and scaling distributed systems - you have seen things break at scale and know how to design so they do not.

- Experience working on or closely with platform or enablement teams: shared libraries, internal tooling, developer experience or API gateways.