Lead Full-Stack Engineer (Java/Kotlin) – FX Platform

Testing Site - JPMC; Lower Blandford St Mary; On-site; GBP 90,000 - 130,000; Full time

Job summary

J.P. Morgan is seeking a Lead Software Engineer for the Transact platform to design, build, and support both client-side and server-side functionality.

The role emphasizes strong backend work in Java/Kotlin and JVM-based tech with a focus on scalable, secure production code and modern frontend capabilities using TypeScript and React. The candidate will work with globally distributed teams, apply agile methodologies, and contribute to architecture and design across the stack, from execution to

Qualifications

• Production-level software experience.
• Design and build scalable server-side applications using Java, Kotlin, or other JVM-based languages.
• Web services with the Spring framework.
• Proficiency with TypeScript and React for high-performance web apps.
• Distributed systems, APIs, and integration with enterprise platforms.
• Test-driven development, modern source control, and CI practices.
• Familiarity with modern frameworks, libraries, tools, and languages across the stack.
• Experience with globally distributed engineering teams.
• Strong SDLC and agile methodologies.
• Strong foundations in computer science.

Responsibilities

• Designs, develops, and troubleshoots both server-side and client-side solutions.
• Produces secure, high-quality production code for backend services and UI components.
• Produces architecture and design artifacts for distributed applications.
• Proactively identifies patterns in system and user data to improve coding hygiene and usability.
• Contributes to software engineering communities of practice and events exploring new tech.

Skills

Production-grade software

JVM languages (Java/Kotlin)

Spring Framework

TypeScript

React

Distributed systems & APIs

Test-driven development (TDD) & CI

Agile methodologies

CS fundamentals

Globally distributed teams

Tools

Spring Framework

TypeScript

React

Job description

J.P. Morgan is seeking a Lead Software Engineer for the Transact platform to design, build, and support both client-side and server-side functionality.

The role emphasizes strong backend work in Java/Kotlin and JVM-based tech with a focus on scalable, secure production code and modern frontend capabilities using TypeScript and React. The candidate will work with globally distributed teams, apply agile methodologies, and contribute to architecture and design across the stack, from execution to