C# Desk Developer (Contract) | Front Office Trading Technology | Investment Bank

London | £650 per day (via Umbrella)

C#, Python, Front Office, Trading Systems, Risk & PnL

The Role:

A leading global investment banking team is looking for a contract C# developer to join a front office technology function supporting a rates trading business in London.

This is a desk-facing engineering role where you'll work closely with traders and technology teams to improve critical trading tools, strengthen platform stability, and help move tactical solutions towards a more scalable long-term architecture. The environment is fast-moving, highly collaborative, and offers direct exposure to front office workflows.

What You Will Be Doing:

• Build and enhance business-critical applications used by trading teams.
• Design and deliver scalable solutions that replace tactical processes and legacy tooling.
• Develop functionality supporting risk management, P&L reporting, and trading workflows.
• Provide hands-on support for production applications used by front office stakeholders.
• Work closely with global technology teams and business users to prioritise and deliver enhancements.
• Help improve engineering standards, automation, reliability, and operational efficiency across the platform.

What You Bring:

• Strong commercial development experience using C# and .NET technologies.
• Experience working within front office, trading, or capital markets environments.
• Good understanding of financial products such as rates, fixed income, equities, or related asset classes.
• Ability to work directly with business users and translate requirements into robust technical solutions.
• Experience supporting and enhancing production trading applications.
• Strong problem-solving skills and a collaborative approach to delivery.

The Package:

• Competitive contract day rate | London-based role | Hybrid working set up
• Front office exposure with direct interaction across trading and technology teams
• Opportunity to work on high-impact business and trading initiatives
• Vertus Partners is a specialist financial markets recruiter. Speak directly with the team for a confidential discussion and full details on the opportunity.