Senior Software Engineer (.NET/C#) - Belfast
At a Glance
• Senior-level .NET/C# engineering role with an established financial technology business
• Hybrid working... 3 days per week in Belfast
• Salary up to £60,000
• Modern, spacious Belfast offices with a strong culture and genuine progression
• Join a high-performing engineering team building business-critical, real-time systems
About the Company
This is an established provider of technology and data solutions to global financial markets, helping clients make better-informed, real-time decisions. The Belfast office operates from modern, spacious premises, with a collaborative culture, strong staff retention and genuine opportunities for progression.
The Role
As a Senior Software Engineer, you will play a key role in delivering business-critical software across the full development lifecycle, working within an Agile, cross-functional engineering team. You will work closely with senior engineers and architects to design and deliver scalable, resilient solutions, taking ownership of key features from design through to release. This role suits an experienced, delivery-focused engineer who is comfortable balancing hands-on technical delivery with mentoring and driving best practice across the team. You will also help shape how the team adopts AI-enabled development tools within a strong governance framework, keeping code quality and delivery velocity high.
Key Responsibilities
• Collaborate with senior engineering leads to design solutions aligned with the wider technology strategy
• Own the design, development and delivery of key features end-to-end
• Partner with QA to embed robust testing practices and maintain defect-free delivery
• Champion engineering best practice, including unit testing, code reviews and maintainable design
• Apply AI-enabled development tools to improve productivity and code quality within a well-governed framework
• Evaluate and adopt new technologies, tools and methodologies to drive continuous improvement
• Design solutions that meet functional and non-functional requirements, including performance and scalability
• Mentor junior engineers and support a collaborative, high-performing team culture
• Communicate progress, risks and dependencies proactively, escalating early where needed
What You'll Need
Essential:
• 5+ years' experience as a Senior Software Engineer in a complex, delivery-focused environment
• Strong expertise in .NET (C#) across modern .NET Framework and .NET Core
• Proven experience building distributed, real-time systems and scalable components
• Solid relational database experience (e.g. MS SQL Server, MySQL), including schema design and optimisation
• Proficiency in WPF application development
• Hands-on experience with event-driven and asynchronous messaging architectures
• Experience with cloud platforms, preferably AWS
• Strong understanding of CI/CD pipelines and version control (GitHub/GitLab)
• Working knowledge of Agile methodologies across geographically distributed teams
Desirable / Nice to Have:
• Experience within financial services or trading platforms
• Knowledge of the FIX protocol
• Exposure to Java and/or JavaScript
Why Apply?
• Salary up to £60,000
• Hybrid working... 3 days per week in Belfast
• Join a business at the forefront of financial markets technology
• Modern, spacious Belfast offices with a strong collaborative culture
• Strong staff retention and genuine, structured progression opportunities
• Work alongside senior engineers and architects on business-critical systems
• Exposure to AI-enabled development tooling within a well-governed environment
• Collaborative, high-performing engineering culture
Next Steps
Interested in finding out more? Reach out to Eve Geddis on LinkedIn or send your CV to eve@ochopeople.com.
