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# Software Engineer - Data Platform for Trading

- **Company:** Harrington Starr
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £182,000.0 - £195,000.0
- **Contract:** Temporary contract
- **Skills:** Application Programming Interfaces (APIs), Amazon Web Services, C Sharp (Programming Language), Information Engineering, Data Infrastructure, Extract Transform Load (ETL), Database Queries, Python (Programming Language), Microsoft SQL Server, Performance Tuning, Service Design, SQL Stored Procedures, Data Processing, GitHub Copilot, Indexer, Backend, Build Management, Api Design, Data Pipelines, Legacy Systems
- **Published:** May 16, 2026
- **Apply:** https://find.jobs/jobs-near-me/software-engineer-data-platform-for-trading-london/2771111809-2/

## About the Role

* 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

## Description

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


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