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- Tasks: Design and build low-latency trading systems using Python and Rust.
- Company: Exclusive institutional trading firm with a focus on innovation.
- Benefits: Up to £140,000 base salary, ~20% bonus, equity, and hybrid work.
- Why this job: Join a senior engineering team and make an impact in live markets.
- Qualifications: Experience in Python and understanding of low-latency systems.
- Other info: Fast-paced environment with opportunities for career growth.
The predicted salary is between 84000 - 196000 £ per year.
We are an exclusive hiring partner for an institutional trading firm building the next generation of its core execution and order-lifecycle infrastructure. This team owns systems that sit directly on the critical path of live markets. The mandate is to design, build, and operate low-latency, high-throughput trading services under strict performance and reliability constraints.
You’ll be part of a small, senior-leaning engineering group responsible for:
- Core Order Management Systems (OMS)
- Exchange gateway connectivity
- Market data ingestion
- Real-time risk
- Internal orchestration and tooling that supports live trading
These systems handle real capital, real counterparties, and real-time failure scenarios.
Technologies used:
- Python (~80%) – core services, orchestration layers, tooling, and system glue
- Rust (~20%) – latency-critical paths and performance-sensitive components
Heavy use of:
- Concurrency & multithreading
- Network-level programming
- Distributed systems under load
Engineers are expected to reason deeply about latency, determinism, throughput, failure modes, and back-pressure. This is not application-layer feature development.
The work is:
- Highly hands-on and ownership-driven
- Focused on systems where microseconds matter
- End-to-end: design → implementation → testing → production behaviour
- Pragmatic, with minimal process overhead and fast iteration cycles
Seniority: 4 open roles ranging from Junior (2+ years) to Lead (6+ years).
Interview Process (3 Stages):
- 60 min Video call – Engineering Manager
- 90 min Video call – Technical deep dive with Tech Lead
- 60 min Video call – Final cultural interview with C-Suite
If you’re interested in core trading infrastructure, low-latency systems, and technically demanding work, I’d be happy to share more details in a conversation.
Python Engineer in England employer: Realm
Contact Detail:
Realm Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Python Engineer in England
✨Tip Number 1
Get your networking game on! Connect with folks in the trading and tech scene, especially those who work in low-latency systems. Attend meetups or webinars to make those valuable connections that could lead to job opportunities.
✨Tip Number 2
Prepare for those technical interviews like a pro! Brush up on Python and Rust, focusing on concurrency, multithreading, and distributed systems. Practise coding challenges that mimic real-world scenarios to show off your skills.
✨Tip Number 3
Showcase your passion for trading infrastructure! When you get the chance, talk about your interest in low-latency systems and how you’ve tackled performance issues in past projects. This will help you stand out as someone who truly gets the role.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who take that extra step to connect with us directly.
We think you need these skills to ace Python Engineer in England
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the Python Engineer role. Highlight your experience with low-latency systems, concurrency, and any relevant projects that showcase your skills in Python and Rust. We want to see how you fit into our world!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're passionate about institutional trading and how your background aligns with our needs. Keep it concise but impactful – we love a good story!
Showcase Relevant Projects: If you've worked on projects that involve real-time systems or trading infrastructure, make sure to mention them. We’re keen to see examples of your hands-on experience and how you’ve tackled challenges in high-pressure environments.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you don’t miss out on any important updates. Plus, it shows you’re serious about joining our team!
How to prepare for a job interview at Realm
✨Know Your Python Inside Out
Make sure you’re well-versed in Python, especially its concurrency and multithreading capabilities. Brush up on how to handle low-latency systems and be ready to discuss your past experiences with Python in high-performance environments.
✨Understand the Trading Landscape
Familiarise yourself with institutional trading platforms and the core concepts of order management systems. Being able to speak knowledgeably about market data ingestion and real-time risk will show that you’re not just a coder but someone who understands the business context.
✨Prepare for Technical Deep Dives
Expect the technical interview to be rigorous. Prepare to solve problems on the spot, particularly around distributed systems and network-level programming. Practising coding challenges related to performance-sensitive components can give you an edge.
✨Show Your Ownership Mindset
This role is all about hands-on ownership. Be ready to share examples from your past work where you took initiative and drove projects from design through to production. Highlighting your ability to work under strict performance constraints will resonate well with the interviewers.
