Java Engineer - Market Data

CBSbutler Holdings Limited trading as CBSbutler; City Of London; Hybrid; GBP 85,000 - 110,000; Full time

Job summary

CBSbutler Holdings Limited trading as CBSbutler in London is seeking a skilled Java Engineer to lead the migration of a Futures algorithmic trading platform from LSEG/Refinitiv RFA to RTSDK. The role is hybrid (3 days per week in the office) and centers on preserving trading functionality and low-latency performance during the transition.

The candidate will analyse current market data usage, implement framework changes, and develop tests with AI-assisted tooling to accelerate delivery while

Qualifications

• Strong experience with Futures & Options market data, particularly LSEG/Refinitiv.
• Proven Java development experience within electronic trading environments.
• Good understanding of market data, exchange feeds and trading workflows.
• Experience with complex codebases and technology migrations.
• Strong focus on performance, scalability and low-latency processing.
• Experience with TDD and automated/regression testing.
• Familiarity with AI-powered development tools.
• Strong analytical, problem-solving and communication skills.

Responsibilities

• Analyse existing RFA market data usage and map functionality to RTSDK.
• Assess differences in market data fields and behaviour across exchanges.
• Develop enhancements to Java applications and shared frameworks to support RTSDK.
• Support a phased migration while maintaining compatibility and system stability.
• Develop and execute automated, regression and integration testing.
• Use AI-assisted development tools to improve coding, testing and productivity.

Skills

Java

RTSDK

LSEG Refinitiv

Performance

Low-latency

TDD & tests

AI tools

Problem solving

Tools

RTSDK

LSEG Refinitiv

Job description

Java Engineer - Market Data - LSEG/RTSDK Migration

Permanent

London - Hybrid 3 days per week

Salary - £85K - £110K

We are seeking an experienced Java Engineer with strong market data and electronic trading experience to support the modernisation of a Futures algorithmic trading platform.

The role will focus on migrating from the legacy LSEG/Refinitiv RFA API to RTSDK, analysing existing market data usage, implementing application and framework changes, and ensuring trading functionality and performance remain consistent throughout the transition.

Responsibilities:

• Analyse existing RFA market data usage and map functionality to RTSDK.
• Assess differences in market data fields and behaviour across relevant exchanges.
• Develop enhancements to Java applications and shared frameworks to support RTSDK.
• Support a phased migration while maintaining compatibility and system stability.
• Develop and execute automated, regression and integration testing.
• Use AI-assisted development tools to improve coding, testing and productivity.

Skills and Experience:

• Strong experience with Futures & Options market data, particularly LSEG/Refinitiv.
• Proven Java development experience within electronic trading environments.
• Good understanding of market data, exchange feeds and trading workflows.
• Experience working with complex existing codebases and technology migrations.
• Strong focus on performance, scalability and low-latency processing.
• Experience with TDD, automated testing and regression testing.
• Familiarity with AI-powered development tools.
• Strong analytical, problem-solving and communication skills.

It would be an added advantage if you had any of the following:

• Previous RFA-to-RTSDK migration experience.
• Experience with low-latency trading and real-time market data systems.
• Knowledge of Futures market structure, exchange connectivity and market data normalisation.
• Experience developing shared frameworks or platform libraries.

CBSbutler is operating and advertising as an Employment Agency for permanent positions and as an Employment Business for interim / contract / temporary positions. CBSbutler is an Equal Opportunities employer and we encourage applicants from all backgrounds