Senior Software Engineer

Opus Recruitment Solutions; Greater London; On-site; GBP 76,500 - 93,500; Full time

Job summary

A fast-growing tech firm is seeking a Senior Full Stack Developer to work on AI-powered tools that support critical decision-making. You'll handle a React frontend and Java/Spring Boot backend, guiding architecture, mentoring developers, and driving engineering standards. Offering up to £85k in salary with additional benefits. Ideal candidates should have strong API design and delivery experience with complex systems. This role is remote and located in the United Kingdom.

Qualifications

• Understanding of API design, integration and security.
• Experience with relational databases.
• A track record of delivering complex systems with clean architecture.

Responsibilities

• Lead engineering on AI integrations and critical internal systems.
• Influence architecture and drive engineering standards.
• Mentor developers and elevate team capability.

Skills

API design

Integration

Security

Relational databases

Job description

Associate Director @ Opus Recruitment Solutions | Shaping the Future of Tech firms across UK (JVM - Java, Scala & Kotlin) 🚀

Senior Full Stack Developer – Java & React

Build Products That Shape High‑Stakes Decision‑Making

I have partnered up with a fast‑growing tech firm who are building AI powered tools used by Fortune 500 business leaders. They are enabling them to make critical decisions across the business and have reportedly been ranked as #1 in their field!

They’re scaling quickly, backed by major investment, and looking for a Senior Full Stack Developer who want to work on complex, high‑impact systems where performance, security and clarity really take precedence.

You’ll work hands‑on across a React frontend and Java/Spring Boot backend, guiding architecture, mentoring developers and delivering features that power intelligent, insight‑driven decision platforms.

You’ll be part of a role that will:

• Lead engineering on AI integrations and critical internal systems
• Influence architecture and drive engineering standards
• Mentor developers and elevate team capability

What we expect from you:

• Understanding of API design, integration and security
• Experience with relational databases
• A track record of delivering complex systems with clean architecture

The salary for this Full‑stack Developer role can go up to £85k, based in London (remote) and has a range of benefits on offer.

Please note, we cannot offer sponsorship for this role.

With a two‑stage interview process in place, if this sounds like you – then please get in touch via [e-mail] or add me on LinkedIn – Rebeka Mulk, to set up an informal chat.

Referrals increase your chances of interviewing at Opus Recruitment Solutions by 2x.

Job type: Full‑time | Seniority level: Mid‑Senior | Function: Information Technology | Industry: Technology, Information and Media.