Senior Java/Kotlin Engineer - Prime Finance Modernization

Grid Dynamics; Greater London; Hybrid; GBP 120,000 - 150,000; Full time

Benefits offered by this job

Bleeding-edge projects

Well-equipped office

Corporate events

Professional development

Flexible schedule

Competitive salary

Medical insurance

Sports

Job summary

Grid Dynamics in London is seeking a Senior Java/Kotlin Engineer to re-engineer Prime Finance trading and post-trade systems within a live production environment. You will design, develop and deploy resilient services in Java and Kotlin, collaborating with stakeholders to modernise legacy components and deliver complex financial workflows.

The role requires deep capital markets knowledge, strong multi-threading and event-driven architecture skills, and a commitment to trunk-based development,

Qualifications

• Expert Java development experience.
• Hands-on experience designing and developing event-driven systems.
• Experience within capital markets, trading or post-trade environments.

Responsibilities

• Re-engineer core trading and post-trade systems using Java and Kotlin.
• Design and develop event-driven, message-based and event-sourced systems.
• Design for failure handling, ordering guarantees and data integrity.
• Modernise and refactor large-scale legacy systems while maintaining production stability.
• Build data and market-expansion platforms supporting the Equity Accelerator programme.
• Apply TDD and shift-left testing throughout the development lifecycle.
• Deliver through trunk-based development and CI/CD.
• Support frequent, zero-downtime production releases.

Skills

Java expert

Kotlin experience

Concurrency & performance

Event-driven design

Event sourcing

TDD experience

Automated testing

Capital markets knowledge

Trading/post-trade

Legacy refactoring

CI/CD / trunk-based

Zero-downtime releases

Autonomous work

Strong communication

Job description

Grid Dynamics in London is seeking a Senior Java/Kotlin Engineer to re-engineer Prime Finance trading and post-trade systems within a live production environment. You will design, develop and deploy resilient services in Java and Kotlin, collaborating with stakeholders to modernise legacy components and deliver complex financial workflows.

The role requires deep capital markets knowledge, strong multi-threading and event-driven architecture skills, and a commitment to trunk-based development,