Software Engineer - Data Platform for Trading

Senior Software Engineer / Data Platform Engineer

Be one of the first applicants, read the complete overview of the role below, then send your application for consideration.

London Area, United Kingdom (Hybrid – 3 days onsite)

Contract Type: 6 month Inside IR35

£700–£750 per day

The Role

You will support the evolution of a large-scale financial data platform, modernising legacy enterprise systems while building scalable cloud-based services on AWS. Own SQL Server optimisation, backend service design, and API development in a high-impact platform modernisation initiative.

What You'll Do

• Develop and optimise SQL Server queries, stored procedures, and data processing logic
• Design and build backend services in Python or C#
• Modernise legacy platforms and improve system performance
• Build and maintain AWS-hosted services and APIs
• Collaborate with distributed engineering and product teams

Top Skills Required

• Advanced SQL Server expertise (performance tuning, indexing, complex queries) – non-negotiable
• Backend development in Python or C#
• AWS environment experience
• Proven experience in enterprise or legacy systems – critical
• Strong analytical and problem-solving abilities

We'd expect you to have around 10 years of software and data engineering skills.

Nice-to-Haves

• Financial services or market data background
• Experience modernising legacy platforms
• API design and ETL/data pipeline experience
• AI-assisted development tools (GitHub Copilot)
• Quantitative or mathematics background

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