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# Senior Software Developer

- **Company:** Spectrum IT Recruitment
- **Location:** London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** .NET Framework, Microsoft Windows, Algorithmic Trading, Automation of Tests, C Sharp (Programming Language), Profiling, Code Review, Databases, Continuous Integration, Database Applications, Relational Databases, Distributed Systems, Systems Theories, Microsoft SQL Server, Network Programming, Object-Oriented Software Development, Oracle (Applications), Performance Tuning, Service-Oriented Architecture, Software Engineering, TCP/IP, Multithreading, Software Application Programming, Parallel Computation, Git, Solid Principles, Information Technology, Low Latency, Asynchronous Programming, Software Version Control
- **Published:** August 20, 2026
- **Apply:** https://www.totaljobs.com/job/senior-software-developer/spectrum-it-recruitment-limited-job107876652

## About the Role

* 5+ years' professional software development experience
 * Strong commercial experience developing applications using C# and modern .NET
 * Excellent understanding of object-oriented programming, software design principles and architecture
 * Proven experience designing and developing production-grade, scalable software systems
 * Strong experience working with SQL Server, Oracle or another enterprise relational database
 * Experience developing reliable applications where performance and scalability are important
 * Strong problem-solving and analytical abilities
 * Experience working across the full software development lifecycle
 * Strong understanding of software engineering principles, development methodologies and version control
 * Excellent written and verbal English communication skills
 * High level of attention to detail and a methodical approach to problem solving
 * Bachelor's degree or higher in Computer Science, Mathematics, Physics, Engineering or another relevant scientific/technical discipline

Desirable Technical Experience

 * Experience developing multi-threaded and concurrent applications
 * Understanding of asynchronous programming and parallel processing
 * Experience with TCP/IP, UDP or network programming
 * Experience building low-latency or high-throughput applications
 * Experience working with Git or other distributed version control systems
 * Strong understanding of Windows development technologies
 * Experience with automated testing and continuous integration
 * Exposure to distributed systems and service-oriented architectures
 * Experience with performance profiling and application optimisation
 * Familiarity with financial markets, quantitative research, algorithmic trading or trading systems
 * Experience working alongside quantitative analysts, researchers, traders or data scientists

## Description

An excellent opportunity for an experienced Senior Software Developer to join a high-performing technology team responsible for architecting, developing, and enhancing sophisticated trading and research systems.

This role would suit a strong C#/.NET engineer who enjoys solving complex technical problems and wants to have genuine influence over the architecture and direction of the systems they build.

You will work on a combination of greenfield development and the continuous improvement of established platforms, building high-performance, reliable and scalable applications that directly support real-world trading strategies and quantitative research.

As a senior member of the engineering team, you will have the opportunity to influence technical architecture, development standards, performance optimisation and engineering best practices, while working closely with researchers, traders and other technical specialists., * Design, develop and maintain high-performance applications using C# and modern .NET

 * Take ownership of significant software development projects from initial design through to production
 * Contribute to and lead architectural and technical design decisions
 * Design and develop scalable systems supporting automated trading, research and data-driven applications
 * Work closely with quantitative researchers and traders to understand requirements and translate them into robust technical solutions
 * Develop, optimise and maintain relational database solutions using SQL Server, Oracle or equivalent
 * Identify and resolve performance bottlenecks across applications, databases and supporting infrastructure
 * Develop solutions with a strong focus on reliability, scalability, maintainability and performance
 * Contribute to the design of multi-threaded, concurrent and potentially distributed applications
 * Participate in code reviews and maintain consistently high engineering standards
 * Establish and promote software development best practices across the team
 * Mentor and support junior and mid-level developers
 * Contribute to development tooling, automation, testing and continuous improvement initiatives
 * Investigate complex technical issues and provide effective, long-term solutions
 * Help shape coding standards, development processes and overall engineering practices
 * Stay current with developments across the C#/.NET ecosystem and modern software engineering practices


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