Software Engineer - Data Platform for Trading

Software Engineer - Data Platform for Trading

Posted 4 days ago by Harrington Starr

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£750 Per day
Inside
Hybrid
London Area, United Kingdom
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Advanced Mathematics Amazon Web Services (AWS) Application Programming Interface (API) Cloud Services Data Engineering Data Processing File Servers Financial Data Github Indexing Market Data Microsoft SQL Servers Python (Programming Language) Service Design Software Engineering SQL (Programming Language)

Summary: The Senior Software Engineer / Data Platform Engineer role focuses on enhancing a large-scale financial data platform by modernizing legacy systems and developing scalable cloud-based services on AWS. The position requires expertise in SQL Server optimization, backend service design, and API development. The role is contract-based for six months and operates in a hybrid working arrangement. Candidates should possess significant experience in software and data engineering, particularly within enterprise environments.

Key Responsibilities:

  • 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

Key Skills:

  • 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
  • 10 years of software and data engineering skills
  • Financial services or market data background (nice-to-have)
  • Experience modernising legacy platforms (nice-to-have)
  • API design and ETL/data pipeline experience (nice-to-have)
  • AI-assisted development tools (GitHub Copilot) (nice-to-have)
  • Quantitative or mathematics background (nice-to-have)

Salary (Rate): £750 daily

City: London

Country: United Kingdom

Working Arrangements: hybrid

IR35 Status: inside IR35

Seniority Level: undetermined

Industry: IT

Detailed Description From Employer:

Senior Software Engineer / Data Platform Engineer

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

To Apply - click the link provided. OR Email Barry.Ansell@HarringtonStarr.com for a faster response.

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