Backend Engineer
🚀 SEED-Stage FinTech
đź“Ť Hybrid: City of London (3 days per week onsite)
💰 £80,000 – £95,000 + Equity + Benefits
Did you know financial fraud costs the UK economy ÂŁ200bn+ per year, accounting for over 40% of crime in England and Wales? This early-stage FinTech is on a mission to fight financial crime and reduce scams in online payments
High-ownership, mission-driven, working with sensitive financial data. This is critical infrastructure. When it fails, real people lose money.
What You’ll Do
* Build the APIs and UIs banks plug into their payment flows
* Connect the investigation engine to messy, real-world data (APIs, documents, scraped sources — most of it unstructured)
* Design the orchestration layer that gathers and evaluates evidence across heterogeneous systems
* Ship reliable, secure, observable production code
* Deploy and iterate on LLM-powered investigation flows (not just prototypes)
* Make smart build vs buy decisions and own the trade-offs
This isn’t a feature factory. You’ll design, build, ship, own.
Tech: Kotlin (open to any JVM background), Python, Terraform, Agentic AI, cloud-native, event-driven services
If you’ve built fault-tolerant, distributed systems before, tools matter less than judgement
You’ll Have
* 3+ years building production distributed systems in a startup environment, using backend languages like Java, Kotlin, Scala, Python, C++, Rust or Go
* Experience designing external-facing APIs and working with messy, unstructured data
* Shipped AI/ LLM systems beyond proof-of-concept
* Startup experience: comfortable in ambiguity, taken high ownership
* Strong instincts on trade-offs, speed vs correctness
* Computer Science degree or equivalent
Why Join?
* Work with a highly talented team of 8 other Engineers
* Real equity
* High-stakes technical challenges
* AI X distributed systems X regulated finance
If you want to build fast, reliable AI infrastructure that banks depend on, apply with your CV.