Backend Engineer – C#, .Net, Azure | Financial Services | outside IR35| Hybrid

Backend Engineer – C#, .Net, Azure | Payments Financial Services | £600/day outside IR35| Hybrid

We’re partnering with a leading financial services firm in the Fin Tech payment space that’s investing heavily in modernising its technology stack. With a new tech leader driving innovation, the focus is on building in-house systems that are scalable, reliable, and future‑ready.

Backend Engineer position. You’ll take ownership of building and enhancing key client‑facing applications using C#, .Net, Azure. As a Backend Engineer you will have tried and tested experience joining a Fin Tech/Financial Services company at the stage of 0‑50 employees. This company is looking to grow significantly, building out 4 new engineering teams including Seniors and Team Leads.

The work spans complex financial products, so you’ll have the chance to engage with both technical and business stakeholders across the UK.

Paying up to £600 per day (Outside IR35)

1‑2 days per week on‑site in London area

• Collaborate with back‑end engineers working in C# to deliver seamless integrations.
• Participate in design discussions and help modernise legacy front‑end components.
• Ensure code quality through testing and best practices.
• Work in a collaborative, cross‑functional global team (QA, BA, Dev).
• Contribute ideas to improve usability, scalability, and performance.

• Expertise in the latest versions of .NET Framework and .NET Core (C#)
• Experience in API (REST, Graph
  
  QL) design and development
• Experience in relational database design and optimisation (MSSQL, MySQL, etc.)
• Experience in the deployment and management of cloud (AWS, Azure, etc.) assets
• Experience with end‑to‑end testing and agile practices
• Strong communication and problem‑solving skills
• Ability to work independently and as part of a distributed team
• Financial Services/Fin Tech experience

If you’re a passionate Backend Engineer who enjoys building high‑quality, scalable applications and wants to be part of a team modernising financial systems, we’d love to hear from you.

Apply now by sending your CV to alfie or by replying directly to this advert.