Harrington Starr
Senior Software Engineer
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Software Engineer
London / Remote | Perm Role
£80,000 - £100,000
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.
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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 middle and back office systems
- Strong SQL skills
- Experience with cloud-native solutions (Azure or AWS)
- Knowledge of event-driven, microservices architectures
- Full SDLC experience — from design through delivery and support
- Interest and utilisation of AI technologies
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Key Benefits
- 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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