Principal Software Engineer

Company: Burns Sheehan
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Principal Software Engineer | Payments | Credit Card Product

Remote (UK based) or Hybrid working – Fantastic Central London Offices

Profitable FinTech scale-up

0-1 Product build in the Credit Card space

We’re partnered with a profitable, VC‑backed fintech scale‑up who are helping thousands of small businesses across Europe with their cash flow, inventory and financing. They combine a modern, data‑driven approach to product development with software engineering best practices. They’re one of the UK’s standout tech employers in the fintech space.

Project Overview & Role Purpose

The team are hiring a Principal (or Staff) Software Engineer to drive and support the delivery of a new credit card product. Long term, the goal is to build all of the functionality in‑house. For this reason, they need someone with knowledge of the various areas that make up a credit card product and how to glue it all together e.g. payments architecture and authorisation workflows, interest calculations, rewards etc.

Requirements

  • Experienced hands‑on software engineer proficient in an object‑oriented programming language, ideally something like Python or Java.
  • Experience with knowledge in areas (but not all) of payment infrastructure, financial ledgers, DLT, Credit Cards.
  • Ability to mentor, and grow a small group of talented engineers, and improve engineering standards across the wider organisation.
  • Experience designing and building highly available, low‑latency payments/transactional systems.

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Posted: December 14th, 2025