Java Engineer - Market Data - LSEG/RTSDK MigrationPermanentLondon - Hybrid 3 days per weekSalary - 85K - 110KWe 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 and 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. ..... full job details .....