Senior Java Developer | Hedge Fund | London

JR United Kingdom; Slough; On-site; GBP 120,000 - 130,000; Full time

Job summary

A leading systematic family office seeks a Senior Java Developer for a high-impact greenfield project. The ideal candidate will have significant Kafka expertise and Java development experience, contributing to a team focused on modernizing trading and operational systems. This is an on-site position in Slough with a contractual engagement of 12 months.

Qualifications

• 6–8+ years of commercial Java development.
• Deep production-grade Kafka experience.
• Financial services experience is a plus.

Responsibilities

• Contribute technically to high-performing engineering team.
• Replace legacy platforms with modern systems on a greenfield project.
• Build across trading support systems, infrastructure, and execution tools.

Skills

Kafka

Microservices

Java

Job description

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Senior Java Developer | Hedge Fund | London, slough

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Client:

OFS

Location:

slough, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

2

Posted:

28.06.2025

Expiry Date:

12.08.2025

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Job Description:

? Java Developer – 12-Month FTC | Greenfield Build | London ?

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

? Salary: Up to £130k base + potential completion bonus

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.