Senior Software Engineer - Credit

LemFi
London, United Kingdom
Hybrid

Who this role is best for

Strong fit for backend engineers with fintech and credit product experience who thrive in fast-paced, autonomous environments.

Best fit for

  • Candidates with fintech experience in credit systems and a strong Go background
    — “Strong backend engineering in Go; Java experience is a plus given our existing services”
  • Individuals who have built systems from scratch in high-growth environments
    — “Experience in a high-growth startup or scale-up where you helped establish engineering foundations from scratch”

Things to consider

  • This role demands high responsibility for system correctness and real-world impact
    — “You care about correctness and data integrity as much as velocity”
  • The team is in early stages, requiring candidates to help shape engineering culture
    — “Contribute to growing the tribe - as one of the earliest engineers you'll help set the engineering culture”

How to stand out

  • Highlight experience with distributed systems and loan lifecycle state machines
    — “Make the right architectural calls independently - data residency, service boundaries, state-machine design for loan lifecycles”
  • Emphasize your ability to work with incomplete specs and take ownership of production systems
    — “Comfortable operating with autonomy in an environment where the spec is never fully finished”
  • Demonstrate a track record of building credit-related systems or adjacent domains
    — “Exposure to credit products (lending, underwriting, repayment, collections) at any level”
  • Showcase your experience with AI coding tools and test coverage improvements
    — “Use AI coding tools actively to accelerate delivery and improve test coverage”
Pace · Fast PacedCollaboration · MediumAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • high-reliability backend services
  • efficient credit product systems
Typical background
backend developmentfintechcredit products

Skills & requirements

Required

Backend DevelopmentGoJavaDistributed SystemsCredit Product Design

Preferred

FintechAI Coding Tools

Stack & domain

GoJavaDistributed SystemsCredit ProductsFintechAI Coding Tools

About the role

Original posting from LemFi via Ashby

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 millions of users across the globe, we process over $1B in monthly transactions to 30+ countries, proving that borders shouldn't limit financial opportunity.

ABOUT THE ROLE

LemFi's Credit tribe is early and moving fast. We're building the infrastructure that will power lending products for millions of people who've historically been locked out of fair credit - immigrants, diaspora communities, and the financially underserved across our 21 operating markets. This is a ground-floor opportunity: the tribe is being built right now, and the systems you design today will be the foundation everything else sits on.

We're looking for a Senior Software Engineer to join the Credit tribe and own core backend services end-to-end. You'll be working primarily in Go, with some existing Java services in the mix - switching between them is not the blocker, deep engineering craft and an instinct for how credit products behave is. We move fast and we don't micromanage, which means you'll need to bring the domain awareness to make the right call before anyone has to tell you.

WHAT YOU'LL BUILD AND OWN

  • Design, build and operate high-reliability backend services that power LemFi's credit products, from loan origination and underwriting through to repayment and collections.
  • Make the right architectural calls independently - data residency, service boundaries, state-machine design for loan lifecycles - without needing to be told what a credit-safe system looks like.
  • Own your services in production: instrument them, monitor them, debug them, and hold the bar on reliability and correctness.
  • Work closely with product and compliance to translate credit-domain requirements into clean, testable, maintainable code.
  • Use AI coding tools actively to accelerate delivery and improve test coverage, while taking full ownership of the correctness of every line that ships.
  • Contribute to growing the tribe - as one of the earliest engineers you'll help set the engineering culture, review others' work, and raise the bar on how we build.

YOUR EXPERIENCE

  • Strong backend engineering in Go; Java experience is a plus given our existing services, but Go is the primary language.
  • Meaningful fintech experience - you understand how financial systems behave under load, under regulation, and under audit.
  • Exposure to credit products (lending, underwriting, repayment, collections) at any level - even adjacent - so you arrive with the right instincts, not just a willingness to learn them.
  • Solid grasp of distributed systems design: event-driven architecture, service boundaries, data consistency, and failure modes.
  • You care about correctness and data integrity as much as velocity - you've worked in environments where getting it wrong has real consequences for real people.
  • Comfortable operating with autonomy in an environment where the spec is never fully finished and the team is still being built.

NICE TO HAVE

  • Direct experience building credit decisioning, risk scoring, or loan management systems.
  • Experience in a high-growth startup or scale-up where you helped establish engineering foundations from scratch.
  • Familiarity with regulatory and compliance constraints specific to consumer credit (e.g. FCA, data protection requirements for credit data).

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.

You can connect with us on LinkedIn https://www.linkedin.com/company/lemfi/ and Instagram https://www.instagram.com/uselemfi/ and if you haven't already, download the app on the App Store https://apps.apple.com/gb/app/lemfi/id1533066809 or Google Play https://play.google.com/store/apps/details?hl=en&id=com.lemonadeFinance.android.

Source: LemFi careers (Ashby)

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