C
Senior Software Developer
City of London
4 hours ago
Full-time
On-site
City of London, London
£120,000 - £140,000 GBP yearly
IT
An exciting opportunity for an experienced Senior Software Developer to join a highly technical engineering team building sophisticated software used across trading and quantitative research.
This is a role for a strong C#/.NET engineer who enjoys solving difficult technical problems, working on performance-critical systems and having genuine input into how software is designed and built.
You'll work across both greenfield development and established platforms, creating scalable, reliable and high-performance applications that directly support trading strategies and quantitative research.
As a senior engineer, you'll have significant influence over architecture, technical direction and engineering standards, while collaborating closely with quantitative researchers, traders and other experienced technologists.
What You'll Be Doing
Design and build high-performance applications using C# and modern .NET
Take ownership of complex development projects from initial design through to production
Influence architecture, technical design and engineering direction
Build scalable systems supporting automated trading, quantitative research and data-driven applications
Work directly with researchers and traders to turn complex requirements into robust software solutions
Design and optimise relational database solutions using SQL Server, Oracle or similar
Identify and resolve performance bottlenecks across applications and databases
Develop reliable, maintainable and highly scalable software
Work with multi-threading, concurrency and asynchronous programming
Investigate complex technical challenges and deliver long-term solutions
Contribute to code reviews, automated testing, CI and development tooling
Mentor other developers and help raise engineering standards across the team
What We're Looking For
5+ years' commercial software development experience
Strong C# and modern .NET development experience
Excellent knowledge of OOP, software design principles and architecture
Experience designing and building production-grade, scalable applications
Strong SQL experience with SQL Server, Oracle or another relational database
Experience developing systems where performance, reliability and scalability matter
Strong understanding of the full software development lifecycle
Excellent analytical and problem-solving skills
Strong communication skills and the ability to work effectively with technical and non-technical stakeholders
Degree in Computer Science, Mathematics, Physics, Engineering or another relevant technical discipline
Highly Desirable
Experience in any of the following would be particularly valuable:
Multi-threaded and concurrent application development
Asynchronous and parallel programming
Low-latency or high-throughput systems
TCP/IP, UDP or network programming
Distributed systems and service-oriented architectures
Performance profiling and optimisation
Automated testing and continuous integration
Windows development technologies
Git and modern development workflows
Financial markets, quantitative research or algorithmic trading
Working alongside quantitative analysts, researchers, traders or data scientists
Why This Role?
This is an opportunity to work on technically challenging software where performance and engineering quality genuinely matter.
You'll have the freedom to influence architecture and technical decisions, tackle complex engineering problems and see the direct impact of the systems you build in a demanding, data-driven environment.
If you're an experienced C#/.NET developer looking for more technical ownership and the opportunity to work on sophisticated trading and research technology, this could be an excellent next move.
Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy
This is a role for a strong C#/.NET engineer who enjoys solving difficult technical problems, working on performance-critical systems and having genuine input into how software is designed and built.
You'll work across both greenfield development and established platforms, creating scalable, reliable and high-performance applications that directly support trading strategies and quantitative research.
As a senior engineer, you'll have significant influence over architecture, technical direction and engineering standards, while collaborating closely with quantitative researchers, traders and other experienced technologists.
What You'll Be Doing
Design and build high-performance applications using C# and modern .NET
Take ownership of complex development projects from initial design through to production
Influence architecture, technical design and engineering direction
Build scalable systems supporting automated trading, quantitative research and data-driven applications
Work directly with researchers and traders to turn complex requirements into robust software solutions
Design and optimise relational database solutions using SQL Server, Oracle or similar
Identify and resolve performance bottlenecks across applications and databases
Develop reliable, maintainable and highly scalable software
Work with multi-threading, concurrency and asynchronous programming
Investigate complex technical challenges and deliver long-term solutions
Contribute to code reviews, automated testing, CI and development tooling
Mentor other developers and help raise engineering standards across the team
What We're Looking For
5+ years' commercial software development experience
Strong C# and modern .NET development experience
Excellent knowledge of OOP, software design principles and architecture
Experience designing and building production-grade, scalable applications
Strong SQL experience with SQL Server, Oracle or another relational database
Experience developing systems where performance, reliability and scalability matter
Strong understanding of the full software development lifecycle
Excellent analytical and problem-solving skills
Strong communication skills and the ability to work effectively with technical and non-technical stakeholders
Degree in Computer Science, Mathematics, Physics, Engineering or another relevant technical discipline
Highly Desirable
Experience in any of the following would be particularly valuable:
Multi-threaded and concurrent application development
Asynchronous and parallel programming
Low-latency or high-throughput systems
TCP/IP, UDP or network programming
Distributed systems and service-oriented architectures
Performance profiling and optimisation
Automated testing and continuous integration
Windows development technologies
Git and modern development workflows
Financial markets, quantitative research or algorithmic trading
Working alongside quantitative analysts, researchers, traders or data scientists
Why This Role?
This is an opportunity to work on technically challenging software where performance and engineering quality genuinely matter.
You'll have the freedom to influence architecture and technical decisions, tackle complex engineering problems and see the direct impact of the systems you build in a demanding, data-driven environment.
If you're an experienced C#/.NET developer looking for more technical ownership and the opportunity to work on sophisticated trading and research technology, this could be an excellent next move.
Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy