Senior Software Engineer (.NET

Senior Software Engineer

Location:

Oxford area (Hybrid – 3 days in office)

Base salary: £70,000 + discretionary bonus

I’m currently working with a well-established financial services technology consultancy based in the Oxford area
. The business specialises in delivering complex, high-volume systems for banks, Fin Tech's, and payment providers, with projects heavily focused on payment integrations and gateway platforms
.

This is a hybrid role, ideally requiring three days per week in the office
, and offers exposure to a wide range of client projects rather than a single internal product. You’ll be working in regulated, transaction-heavy environments where quality, scalability, and security are critical.

• Designing and building solutions using .NET Framework
• Delivering projects centred around payment gateways, integrations, and transactional systems
• Developing front-end applications using modern JavaScript frameworks (Angular or React preferred)
• Deploying and maintaining applications in Microsoft Azure
• Working with containerised environments and Kubernetes
• Collaborating with senior engineers, architects, and client stakeholders
• Owning code quality, best practices, and technical decision‑making
• Mentoring junior and mid‑level engineers

• 5-10 years' commercial software engineering experience
• Strong expertise in .NET Framework (modern .NET/.NET Core exposure beneficial)
• Experience with Angular or React
• Proven hands‑on experience with Azure
• Experience working with Kubernetes
• Background in financial services, ideally with payments exposure
• Experience with payment integrations, gateways, or high‑volume transactional systems
• Demonstrated mentoring or technical leadership experience
• Comfortable working in a consultancy or client‑facing environment

• Experience with AWS
• Previous consultancy experience
• Strong API and integration skills
• Exposure to regulated or compliance‑driven systems

• £70,000 base salary
• Discretionary annual bonus
• Hybrid working model (3 days per week in the office)
• Technically challenging projects within financial services and payments
• Clear progression and opportunities for technical leadership
• Interested? Get in touch to discuss the role confidentially.

Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy.