Senior Developer - Java Spring

Cathcart Associates Group Ltd; Greater London; Hybrid; GBP 59,000 - 70,000; Full time

Job summary

A technology recruitment agency seeks a Senior Java Engineer for a hybrid role in London. The candidate will work on a modern greenfield platform, focusing on Java and Spring Boot development while collaborating closely with a supportive team. The opportunity emphasizes hands-on engagement, delivering impactful solutions, and fostering a culture of continuous improvement. Ideal for those looking to influence both the technical direction and team dynamics without being limited to a single engineering type.

Benefits

Competitive salary

Flexible working days

Collaborative team environment

Qualifications

• Solid, hands-on experience with Java and Spring Boot.
• Comfortable operating at a senior-capable level within a delivery-focused team.
• Experience with React is useful, but backend experience is the priority.

Responsibilities

• Join a collaborative team to work on a modern platform.
• Contribute to new feature development and ongoing improvements.
• Work with applications supporting operational workflows.

Skills

Java

Spring Boot

React

Collaboration

Problem-solving

Tools

OpenShift

Kubernetes

AWS

Job description

Senior Java Engineer

Modern Platform | Greenfield Work | Collaborative Team

Hybrid – 3 days onsite (flexible days)

Up to £70,000 + benefits (some flexibility for the right person)

We’re working with a large, well-established organisation who are continuing to build out a modern, evolving platform that supports real-world operational processes at scale. This is a hands-on role within a pure in-house engineering team, offering a strong mix of delivery, collaboration, and technical influence.

They’re looking for a capable Java engineer who enjoys being close to the code, contributes thoughtfully within a team, and is comfortable working in an environment where delivery and improvement go hand in hand.

The Opportunity

You’ll join a small, collaborative team working on a relatively new system that is still being shaped and evolved. The work includes a healthy mix of new feature development, iteration, and improvement, with room to influence how things are built without the pressure of owning everything.

The balance between hands-on delivery and higher-level contribution naturally shifts depending on priorities – some weeks are delivery-heavy, others allow more space for refinement, learning, and improvement.

While this role sits at a Senior level, the focus is less on title and more on capability, judgement, and how you approach problem-solving.

What You’ll Be Working On

The platform supports a high-throughput operational environment, where software is used directly in day-to-day processes. This includes

• Applications supporting workshop and operational workflows
• Tablet-based interfaces used in live environments
• Integrations with workforce and process management systems
• Ongoing development of a relatively new, greenfield platform

You’ll be joining a team that values pragmatic engineering and steady improvement.

Tech Environment

The stack is modern and well-supported:

• Java / Spring Boot (core focus)
• React on the frontend
• OpenShift / Kubernetes for most deployments
• Full CI/CD pipelines in place
• A growing amount of AWS-native development

DevOps experience isn’t a requirement. The priority is strong application development, with plenty of opportunity to broaden your skill set over time if you’re interested.

What They’re Looking For

• Solid, hands-on experience with Java and Spring Boot
• Comfortable operating at a senior-capable level within a delivery-focused team
• Someone inquisitive who asks questions and contributes ideas
• Happy collaborating closely with other engineers, product and design
• Experience with React is useful, but backend experience is the priority
• They’re open to different strengths – whether that’s delivery, system thinking, mentoring, or continuous improvement – as long as you bring good engineering judgement and a collaborative mindset.

Working Pattern & Culture

• Hybrid working – 3 days per week onsite (flexible days, team-aligned)
• Teams primarily based in London, with cross-site collaboration
• Supportive, low-ego engineering culture
• Emphasis on good engineering practices and sustainable delivery

Interview Process

• Initial remote conversation
• Technical exercise
• Final onsite interview

Interested?

If you’re a strong Java engineer looking for a senior-level role where you can contribute, learn, and have a real impact without being boxed into a single “type” of engineer, this is a great opportunity to explore.

Apply now or get in touch for a confidential conversation.

Cathcart Technology is acting as an Employment Agency in relation to this vacancy.