FX Linear Client & Trading - Full-stack Developer

Korn Ferry Group; Greater London; Hybrid; GBP 83,000 - 109,000; Full time

Job summary

Korn Ferry is seeking a Senior Full Stack Developer for our London engineering team. You will design, build, and scale strategic FX trading software, taking features from concept to production in a hybrid work setup.

The role emphasizes end-to-end ownership, modern UI with React/TypeScript, and robust backend services with Java/Kotlin, Spring Boot, Kafka, and streaming APIs, in a fast-paced financial environment.

Qualifications

• Strong Java and/or Kotlin development experience.
• Experience with Spring Boot, Kafka and Project Reactor.
• Experience building REST and WebSocket/streaming APIs.
• Strong React & TypeScript Front End development.
• Kubernetes & Azure experience.
• Experience with Grafana, Prometheus and/or Splunk.
• Playwright or similar automated testing experience.
• Strong experience using modern AI-assisted development tools.

Responsibilities

• Design, develop and enhance strategic applications supporting FX trading.
• Take end-to-end ownership of features from inception through to production.
• Break complex product requirements into manageable technical deliverables.
• Build scalable Server Side applications and Real Time APIs.
• Develop high-quality, performant user interfaces using React and TypeScript.
• Identify opportunities to improve application architecture, code quality and performance.
• Contribute to architectural discussions and technical decision-making.

Skills

Java

Kotlin

Spring Boot

Kafka

REST

WebSocket/Streaming APIs

React

TypeScript

Kubernetes

Azure

Grafana

Prometheus

Splunk

Playwright

AI-assisted development tools

Job description

Contract: 12 months
Rate: Up to £520 per day, Inside IR35
Working Pattern: Hybrid - 3 days per week in the London office

We are looking for an experienced Senior Full Stack Developer to join a London-based engineering team responsible for designing, building and scaling strategic software products supporting a major Foreign Exchange (FX) trading business.

Key Responsibilities

• Design, develop and enhance strategic applications supporting FX trading.
• Take end-to-end ownership of features from inception through to production.
• Break complex product requirements into manageable technical deliverables.
• Build scalable Server Side applications and Real Time APIs.
• Develop high-quality, performant user interfaces using React and TypeScript.
• Identify opportunities to improve application architecture, code quality and performance.
• Contribute to architectural discussions and technical decision-making.

Key Requirements

• Strong Java and/or Kotlin development experience
• Spring Boot, Kafka and Project Reactor
• Experience building REST and WebSocket/streaming APIs
• Strong React & TypeScript Front End development
• Kubernetes & Azure
• Experience with Grafana, Prometheus and/or Splunk
• Playwright or similar automated testing experience
• Strong experience using modern AI-assisted development tools

About Korn Ferry

Korn Ferry unleashes potential in people, teams, and organizations. We work with our clients to design optimal organization structures, roles, and responsibilities. We help them hire the right people and advise them on how to reward and motivate their workforce while developing professionals as they navigate and advance their careers. To learn more, please visit Korn Ferry at www.Kornferry.com