Senior Java Developer | Hedge Fund | London

OFS; London; On-site; GBP 90,000 - 120,000; Full time

Job summary

OFS is seeking a Senior Java Developer for their Middle Office Engineering team in London. This role involves upgrading key trading and operational systems as part of a digital transformation strategy, focusing on delivering innovative solutions. Candidates should possess deep expertise in Kafka and strong Java development skills, eager to work in a hands-on capacity on a critical, high-performance project.

Qualifications

• 6–8+ years of commercial Java development experience required.
• Deep Kafka experience essential, should be a power user.
• Financial services experience is a plus but not essential.

Responsibilities

• Build and upgrade trading support systems and execution tools.
• Take full ownership of technical delivery in a high-performing team.
• Participate in the greenfield digital transformation programme.

Skills

Kafka

Java

Microservices

Financial Services Knowledge

Job description

Senior Java Developer | Hedge Fund | London

Senior Java Developer | Hedge Fund | London

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This range is provided by OFS. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Managing Consultant | Trading Tech Recruitment | Team Lead @ Orbis | Hiring Engineers for Hedge Funds, HFTs & FinTech | EMEA & US

We’re partnering with a leading systematic family office on an exciting opportunity for a Senior Java Developer to join their Middle Office Engineering team. The team is embarking on a greenfield digital transformation programme, rebuilding key trading and operational systems from the ground up.

Location: Central London (4 days per week in office – non-negotiable)

Engagement: 12-month Fixed-Term Contract, rolling based on start date

The Role

You’ll work as a hands-on contributor in a team of high-performing engineers, taking full ownership of technical delivery. The current focus is an internal project, a large-scale initiative replacing legacy internal platforms with a more modern, performant, and scalable system.

Expect to build across trading support systems, infrastructure, and execution tools, with strong autonomy and end-to-end ownership.

What They’re Looking For

• Kafka – Power User level only (critical requirement)
• Microservices experience is a nice-to-have
• Deep, production-grade Kafka experience is non-negotiable
• 6–8+ years of commercial Java development
• Financial services experience is a plus (swaps, pricing, middle/back office etc.) but not essential
• You’ll need to be a mature, delivery-oriented IC, capable of working with little oversight
• This is an on-site role (4 days/week) – no remote/hybrid flex beyond the agreed schedule
• Please only apply if you're 100% comfortable with that – prior candidates have been withdrawn for changing their minds post-interview
• The team is looking for engineers, not managers – strong individual contributors only

Interview Process

• 30–45 min technical screen with engineering leads
• On-site technical deep dive (~2–2.5 hours) with the wider team
• Feedback and offer turnaround expected within days

If you’re a seasoned Java developer with serious Kafka experience and want to work on a genuinely interesting greenfield project at a high-performance trading firm, apply here or get in touch directly.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Finance and Engineering

• Industries

  Financial Services, IT System Design Services, and IT Services and IT Consulting

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