Senior Java Developer

J.P. Morgan; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

A leading financial institution in London is seeking a Senior Java Developer for a 10-month onsite contract. The role involves designing, building, and maintaining Java-based backend systems, with a focus on cloud-native and microservices architectures. The ideal candidate has hands-on experience with Java, cloud technologies, and mentoring skills. Responsibilities include delivering high-quality solutions, ensuring security, and troubleshooting issues. This position offers an opportunity for collaboration in a dynamic team environment.

Qualifications

• Recent hands-on experience as a backend engineer using Java.
• Proficient in designing and implementing tests (unit, integration, end-to-end, performance).
• Strong knowledge of cloud technologies and distributed systems.
• Experienced in operating, supporting, and securing mission‑critical applications.
• Skilled in mentoring team members on coding practices, design principles, and maintainable solutions.
• Strong English communication and stakeholder management, with the ability to prioritize across multiple workstreams.
• Experienced in TDD and microservices architecture.
• Experience in regulated industries preferred.
• Expertise in cloud‑native microservices and AWS is desired.

Responsibilities

• Design and deliver cloud-native, microservices-based solutions using modern technologies.
• Develop secure code to protect customers and the organization.
• Monitor, troubleshoot, and resolve production issues.
• Develop secure code to protect customers and the organization and promptly investigate and resolve issues to prevent recurrence.
• Optimize data access, performance, reliability, and operability.
• Monitor, troubleshoot, and resolve production issues permanently.
• Continuously evolve architectures, technologies, and patterns.
• Provide end-to-end support for your products throughout their lifecycle, including production and incident management.

Skills

Java

Cloud technologies

Microservices

RESTful APIs

Kafka

Stakeholder management

TDD

Mentoring

Tools

AWS

Relational databases

Job description

Salary: Market Rates - PAYE

Senior Java Developer – JP Morgan – London – 10-month Contract – Onsite

Description

We are seeking a hands on Senior Java Developer to join J.P. Morgan in London on an initial 10 month contract. This is a hands on role where you will design, build, and maintain Java-based backend systems, working with microservices, cloud technologies, and distributed systems. You will help ensure our systems are secure, scalable, and high performing, while collaborating with colleagues and mentoring team members.

Please note that as part of the interview process you will be expected to carry out basic core java coding and systems design since the role involves mentoring less experienced candidates.

Job responsibilities

• Design and deliver cloud-native, microservices-based solutions using modern technologies and best practices.
• Apply domain-driven design to build high-quality business products.
• Design software that is clear, testable, and easy to evolve, while using scalable architectures that eliminate single points of failure.
• Develop secure code to protect customers and the organization and promptly investigate and resolve issues to prevent recurrence.
• Optimize data access, performance, reliability, and operability.
• Monitor, troubleshoot, and resolve production issues permanently.
• Continuously evolve architectures, technologies, and patterns.
• Provide end-to-end support for your products throughout their lifecycle, including production and incident management.

Required qualifications, capabilities, and skills

• Recent hands‑on experience as a backend engineer using Java.
• Proficient in designing and implementing tests (unit, integration, end‑to‑end, performance).
• Strong knowledge of cloud technologies, distributed systems, RESTful APIs, messaging frameworks (e.g., Kafka), and relational databases.
• Experienced in operating, supporting, and securing mission‑critical applications.
• Skilled in mentoring team members on coding practices, design principles, and maintainable solutions.
• Strong English communication and stakeholder management, with the ability to prioritize across multiple workstreams.
• Experienced in TDD and microservices architecture.
• Experience in regulated industries preferred.
• Expertise in cloud‑native microservices and AWS is desired.

What’s Next

If you are ready to take the next step, apply now. Successful applicants will be contacted directly by a recruiter to discuss the role more.