Senior Software Engineer, Data Engineering

RMG Digital
City of London
2 days ago
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Senior Software Engineer (Contract) – Market Data

Inside IR35 | £500-575 per day (flexible) | Hybrid – London


A leading global investment management firm is seeking Senior Software Engineers (Contract) to join its Market Data Platform team on a high-impact engagement. This is a critical hire, with the opportunity to step into a highly visible area of the business where performance, scale and reliability truly matter.


This team sits at the heart of a systematic trading environment, responsible for ingesting and processing vast volumes of real-time market data through direct exchange connectivity. The platform operates at extreme scale - handling 15–20 billion data points per day, with peak rates of over 1 million events per second - and accuracy is non-negotiable.


Two contract roles are available, making this an excellent opportunity for experienced contractors who can hit the ground running.


The Role

  • Design, build and optimise components of a high-throughput market data platform
  • Work across Java (primary) and Python in a performance-critical environment
  • Improve and modernise older parts of the stack with a focus on scalability and latency
  • Partner closely with Data Management teams and Quant Traders within the systematic trading business
  • Contribute to the ongoing expansion of a specialist market data engineering function

Required Experience\

  • Strong commercial experience in Java (essential)
  • Solid Python development experience
  • Background in market data, trading systems, or low‑latency / high‑performance platforms (highly desirable)
  • Experience working with large-scale, real-time data systems
  • Comfortable operating in fast‑paced, high‑stakes environments

Contract Details

  • Rate: £500-575 per day (Inside IR35 – some flexibility for the right candidate)
  • Location: Hybrid – 3 days per week onsite in the City of London.
  • Start: ASAP
  • Contract type: Senior‑level contractor engagement

Interview Process

  • 30-minute introductory discussion with the hiring manager
  • 1-hour technical / programming interview with a team member
  • Possible final 30-minute follow-up
    (at least 1 interviews conducted in person)


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