Software Developer (Future Finance)

TN United Kingdom; London; On-site; GBP 50,000 - 90,000; Full time

Job summary

An innovative firm is seeking passionate developers to join their cutting-edge finance team. This role offers the chance to work with advanced technologies in a collaborative environment, focusing on building high-performance solutions that drive the future of finance. Developers will engage in pair programming, personal development, and continuous learning. With a commitment to quality and rapid feedback, this is an opportunity to make a significant impact in the financial industry while working with a dynamic tech stack that includes Java, MySQL, and blockchain technologies.

Qualifications

• Passion for software development; poor code offends you!
• Ability to work in a fast-paced environment with quick feedback.

Responsibilities

• Work across the stack—from building core Java components to creating financial products.
• Collaborative office environment with constant pairing and social activities.

Skills

Java

MySQL

Kafka

Solidity

Rust

JUnit

Jenkins

Selenium

Tools

Hardhat

in-house tools

Job description

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Client:

LMAX Group

Location:

London, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Reference:

c7ffe1ee186c

Job Views:

6

Posted:

05.05.2025

Expiry Date:

19.06.2025

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Job Description:

LMAX is renowned for its high-performance, ultra-low latency (measured in microseconds) exchange written in core Java. We constantly push technology further, especially in our greenfield projects. Together, we will be driving the financial industry in new directions.

Finance is going to be tokenised through blockchain technologies. We aim to be at the forefront of this wave, working with institutions to build efficient, regulated, and fair markets. We have grown from one developer to a small team over the last year, building a new trading solution that combines centralised liquidity with decentralised security, now live on public blockchains. Our vision extends further, requiring us to grow into multiple teams as we shape the future of finance. Our roadmap is heavily developer-driven, allowing significant influence on project direction.

Developers are encouraged to continually develop new skills. Pair programming supports knowledge sharing and growth. Fridays are dedicated to personal development, exploring new languages, researching cutting-edge technologies, or innovating in finance. We also prioritize improving developer experience and reducing technical debt.

Our culture of continuous integration and testing enables rapid development with confidence. We have developed a suite of tools to support this, utilizing a dynamic tech stack. Continuous Delivery was pioneered at LMAX; we push directly to our monorepo with a 'revert first, ask questions later' approach, thanks to pair programming and testing.

If you seek an environment that values rapid feedback, collaboration, readiness, and is at the heart of financial innovation, then LMAX's future finance team is for you!

What you should expect:

Collaborative office environment with constant pairing and social activities.

• Work across the stack—from building core Java components to creating financial products via smart contracts.
• Opportunities for learning through tech talks, conferences, and personal development time.

What you’ll be working with:

• Backend: Distributed, event-driven Java 21 (80%), MySQL, Kafka, Solidity (EVM Smart Contracts), Rust (Solana Smart Contracts)
• Testing: JUnit, Hardhat, Jenkins, Selenium, in-house tools

The LMAX way is to use the right tool for the job; this list illustrates some technologies you might work with, not strict requirements!

Requirements

• Passion for software development; poor code offends you!
• Ability to work in a fast-paced environment with quick feedback.
• Experience with pair programming in small teams.
• Willingness to share knowledge and learn from peers.
• Commitment to writing performant, reliable, and well-tested code, shipping only when ready.