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Spectrum IT Recruitment

Senior Software Developer

City of London
£120k – £150k/yr
Posted about 22 hours ago
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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.

Key Responsibilities

  • 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

Reasons to use Rodeo

I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?

Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.

Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.

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Grad scheme, placement, apprenticeship? Not sure what you want yet — that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.

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Graduate Consultant — 2026 Scheme

PwC·London, UK
£35,000/yr

Why you're a good match

Strong

Your economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.

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It searches the market for you

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Why you're a good match

You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.

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Strong

Experience fit

Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.

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Strong

Only hits

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Essential Skills & Experience

  • 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

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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

Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.

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Skills

C#
.NET
Object-Oriented Programming
Software Architecture
SQL Server
Oracle
Multi-threading
Concurrent Programming
Low-latency Applications
Asynchronous Programming
TCP/IP
UDP
Git
Performance Profiling
Automated Testing
Continuous Integration

Location

City of London, England, United Kingdom

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