Senior Software Engineer

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Recruiting for C# .NET Software Engineers within the Financial Services Technology space in The City of London and Greater London. Get in touch for…

Software Engineer

London / Hybrid | Perm Role

Harrington Starr has partnered with a fast-growing fintech that’s transforming how businesses manage foreign exchange and treasury operations. Their technology enables clients to access institutional-grade execution, automate manual workflows, and gain greater transparency across their financial processes. Handling billions in transactions each year, they continue to expand their product offering and deliver cutting-edge solutions that help clients manage risk more effectively.

The Role

This is an excellent opportunity for an experienced Software Engineer — ideally with a background in financial technology or FX — to join a high-performing engineering team within a scaling fintech. You’ll be instrumental in developing and enhancing the company’s core trading and treasury systems, building new features, improving performance, and driving integration across their technology stack.

Key Responsibilities

  • Develop and maintain software across the full stack
  • Contribute to architecture and design decisions
  • Support, optimise, and maintain production code
  • Research and integrate new technologies
  • Foster a culture of engineering excellence and continuous improvement

Key Requirements

  • 5+ years’ experience working with C#/.NET
  • Experience developing front and middle office systems
  • Experience with cloud-native solutions (Azure or AWS)
  • Knowledge of event-driven, microservices architectures
  • Full SDLC experience — from design through delivery and support
  • Join a fast-scaling fintech building next-generation financial technology
  • Work on complex, high-impact systems handling large-scale transactions
  • Collaborative, innovative, and growth-oriented team culture
  • Hybrid working model with flexibility and autonomy

Please apply via the link provided or reach out to me directly to book in a confidential phone call - ollie.bluck@harringtonstarr.com

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Seniority level

  • Mid‑Senior level

Employment type

  • Full-time

Job function

  • Engineering and Finance
  • Financial Services and Software Development
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Location:
City Of London, England, United Kingdom
Salary:
£125,000 - £150,000
Job Type:
FullTime
Category:
IT & Technology

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