Senior Software Developer (Java)

About the Role

LMAX is renowned for its high-performance, ultra-low latency exchange written in core Java. We constantly push technology further than most, especially in our greenfield projects, driving the financial industry in new directions.Developers are encouraged to continually develop and learn new skills. Pair programming supports continual growth of knowledge and sharing of expertise, alongside regular team rotations ensuring everyone gains hands-on knowledge of all areas of our codebase. Friday afternoons are set aside as personal development time where you can explore a different coding language, research bleeding edge technologies, or experiment with one of our environments. There is also regularly scheduled time to improve developer experience and reduce technical debt, directed by developers.Our continuous integration and testing culture allows us to have confidence in our builds and to develop quickly. We have over 30,000 acceptance tests running every 25 minutes in our CI, alongside extensive test suites (performance, compatibility, migration, resilience). Continuous Delivery was pioneered at LMAX; one of the authors worked here while writing the book. Due to pair programming and testing we don\''t do pull requests, we push directly to our monorepo with a "revert first, ask questions later" attitude.If you want to work with great developer practices like fast feedback across all aspects of your work, a cooperative culture, and only shipping things when they\''re ready, while being at the heart of a thriving exchange with opportunities to learn about the finance industry, then LMAX is for you!

What you should expect

Collaborative office environment with constant pairing and plenty of social activities

Work across the stack to solve a problem - you might be working with a performance-critical component, integrating a new blockchain, or designing a greenfield cloud-based system

Regular opportunities to learn and develop yourself with internal tech talks, ability to travel to conferences, and dedicated time for your personal development

What you\''ll be working with

Backend: Distributed, event-driven core Java (90% of the code-base), MySQL, Kafka

Frontend: Javascript, Vue.js

Deployment: Kubernetes, Nomad

Data analytics: Python and Jupyter notebooks, Parquet, Docker

Testing: JUnit, JMH, JCStress, Jenkins, Selenium, many in-house tools

OS: Linux (Fedora for development, Rocky in production)

The LMAX way is to use the right tool for the job, so this is just a flavour of what you\''ll be working with and isn\''t a list of requirements.

Requirements

Be passionate about software development. Bad code offends you!

Work in a dynamic environment enabled by fast feedback; the heart of our ethos

Pair programming in small teams of developers and testers (who also write code)

Share knowledge and learn from like-minded peers

Work across a variety of teams covering a wide range of technologies

Write performant, reliable, and well-tested code — shipping only when it\''s ready

Benefits

25 days of holiday

Bonus

Pension contribution

Private medical, dental, and vision coverage

Life assurance

Critical illness cover

Wellness contribution program with access to ClassPass

Plaum Platform

Five volunteering days

Give as You Earn initiative

Learning and development programs

Electric Vehicle Scheme

Cycle to Work Scheme

Season Ticket Loan

Seniority level

Mid-Senior level

Employment type

Full-time

Job function

Information Technology

Industries

IT Services and IT Consulting

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