About this role
Salary: £34,000 - 70,000 per year
Requirements: Production experience with functional programming languages such as Clojure, Elixir, Erlang, Haskell, Scala, or Scheme, or substantial personal projects demonstrating deep functional programming experience; alternatively, fintech domain expertise in payments, accounts, ledgers, or compliance, including money movement, reconciliation, and regulatory requirementsStrong software fundamentals and distributed systems knowledge, including consistency models, idempotency, and production failure modesExperience working collaboratively in product-focused teams and shaping products alongside product managers and designersComfort adapting to startup pace, changing priorities, evolving requirements, and ambiguity Responsibilities: Explore technical solutions, write RFCs, build proof-of-concepts, and run experiments to validate approachesBuild and maintain banking and payment systems, including transaction reconciliation, double-entry accounting, webhook infrastructure, API versioning, and payment approval workflowsMake technical decisions on projects, including selecting architectures and deciding whether to extend or rebuild existing systemsWork with product managers to shape features and take them from customer problem through production deliverySet technical direction through code reviews, implementation patterns, and architectural decisionsMonitor, debug, and improve production systemsImprove engineering practices and productivity, and build systems that customers find usefulOwn projects end-to-end, from initial RFC and architecture through implementation and live operation Technologies: AIAPIClojureElixirErlangHaskellSupportScalaBazelBackboneProduct ManagerSecurity More:
We are Griffin, a fully regulated UK bank that provides accounts and payment infrastructure for product-led fintechs and platforms. Our banking services support businesses across remittance, payroll, wealth, insurance, property technology, payments, and neobanking; we are also developing card issuing, stablecoin infrastructure, and agentic finance. You will join one of seven small, cross-functional engineering teams that owns a product area end-to-end. We value maintainable, observable, scalable systems and quality delivery. We are remote-first, with flexible asynchronous work and UK-wide hiring; a London office in Moorgate is available but not required. Benefits include 25 days of holiday plus bank holidays and a winter break, share options, up to 20 days working abroad, pension, private medical and life insurance, coaching and therapy, enhanced parental leave, AI tools, and support for your home-working setup. The hiring process typically takes two to three weeks and includes conversations with our Talent Team, manager, team peers, and founders, as well as a job-related task. Offers are conditional on satisfactory background screening, including right-to-work, criminal-record, credit-history, social-media, and professional-reference checks. We welcome diverse perspectives and encourage people to apply even if their experience does not match every listed qualification.
last updated 40 week of 2026