Senior Java Engineer - £140K + Equity | London

Opus Recruitment Solutions; City Of London; On-site; GBP 100,000 - 140,000; Full time

Job summary

A leading technology recruitment firm is seeking a Senior Java Engineer to develop and maintain backend infrastructures. This role offers a competitive salary up to £140,000, along with equity and additional benefits. Candidates should have strong experience with Java, Spring Boot, Microservices, and AWS. This is an exciting opportunity to work in a fast-paced start-up environment in London.

Benefits

Equity

Pension

Bupa healthcare

25 days holiday

Dinner vouchers

Qualifications

• 5+ years of experience in Java development.
• Strong communication and collaboration skills.
• Ambition to thrive in a start-up environment.

Responsibilities

• Build and maintain the backend infrastructure.
• Design APIs to connect mobile app to backend systems.
• Implement real-time currency exchange logic.
• Contribute to exciting greenfield projects.

Skills

Java 21+

Spring Boot

Microservices

AWS

PostgreSQL

React

CI/CD

Communication skills

Job description

Senior Java Engineer £140k + Equity - London

Java 21, Spring Boot, Microservices, AWS

Sometimes the simplest ideas are born from everyday struggles. In regions where inflation is soaring, people have long worried about their savings losing value overnight. Out of that challenge came a new kind of e‑wallet, one that allows you to hold money in dollars and protect it from devaluation.

What began as a way to safeguard savings has evolved into a tool for freedom: enabling people to travel, invest, and plan with confidence. It's not about flashy features or big promises; it's about peace of mind and a fair chance to participate in the global economy while protecting income.

As a Senior Java Engineer, you'll play a key role in building this out and maintaining the backend infrastructure. You'll work with Java 21+, designing APIs that connect the mobile app to backend systems, implementing real‑time currency exchange logic, and contributing to exciting greenfield projects.

Tech stack: Java 21, Spring Boot, Microservices, PostgreSQL, React, CI/CD, AWS.

We're looking for strong x5 Java developers (version 17+) with excellent communication skills and the ambition to thrive in a start‑up environment. The rest can be learned along the way.

Package: £100k-£140k base salary, plus equity, pension, Bupa healthcare, 25 days holiday, dinner vouchers, and more.

With a streamlined interview process and five roles to fill before December, now is the time to get involved. If this sounds like you, or if you know someone who might be interested, please reach out via (url removed) or connect on LinkedIn (Rebeka Mulk @ Opus Recruitment) for an informal chat