Java Engineer - Market Data

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

Benefits offered by this job

Hybrid work arrangement

Job summary

CBSbutler is seeking a seasoned Java Engineer to join a London-based market data project, focusing on migrating from LSEG/Refinitiv RFA to RTSDK. You will analyse existing data usage, map features to RTSDK, and contribute to a high-performance, low-latency trading platform.

The role offers a London hybrid working pattern (3 days on-site) and a salary range of £85k–£110k, with strong emphasis on testing, code quality and collaboration with the trading desk.

Qualifications

• Experience with Futures & Options market data, especially LSEG/Refinitiv.
• Proven Java development in electronic trading environments.
• Strong understanding of market data, exchange feeds and trading workflows.

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-powered development tools to improve coding, testing and productivity.

Skills

Futures & Options market data

Java development

Low-latency processing

Market data workflows

Automated testing (TDD)

Performance & scalability

AI-assisted development tools

Tools

RTSDK

LSEG Refinitiv RFA API

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