At a Glance
- Tasks: Develop and enhance trading systems that power live trading activities.
- Company: Leading global investment firm with a collaborative engineering culture.
- Benefits: Up to £350k total compensation, hybrid work flexibility, and significant technical ownership.
- Other info: Work closely with traders and PMs in a fast-paced environment.
- Why this job: Join a dynamic team solving real-world trading challenges with high visibility.
- Qualifications: Strong experience in platform or trading systems engineering and C# development.
A leading global investment firm is hiring a Senior Platform Engineer to join its front-office Trading Systems engineering group in London. This is a highly technical engineering role focused on the development and evolution of the systems that underpin live trading activity across execution, order management, market connectivity, risk workflows, and operational trading infrastructure.
The position sits directly alongside traders and PMs, but this is fundamentally an engineering-heavy seat. The firm is looking for someone who enjoys owning complex systems, solving difficult workflow and platform problems, and operating close to the commercial heartbeat of the business.
The Role
- You will work across a broad range of front-office platform engineering challenges, including:
- OMS / EMS development
- Execution workflow engineering
- Trading infrastructure reliability
- Market data integration
- Position and PnL workflows
- Risk and operational tooling
- Platform modernisation initiatives
- Internal front-office application development
The work itself is intentionally varied. At any given time, priorities may shift between:
- Greenfield engineering
- Refactoring and modernisation
- Workflow optimisation
- Platform scalability
- Production reliability improvements
- Front-office tooling development
This is not a passive maintenance role. The expectation is that engineers proactively identify weaknesses in systems and workflows, drive technical decisions, and take ownership of problems through to resolution.
The Environment
The engineering culture is lean, collaborative, and highly ownership-driven. Developers are expected to operate as genuine partners to the business rather than isolated technical resources. The strongest engineers in the team are commercially aware, technically decisive, and comfortable working directly with traders and PMs in fast-moving environments. The role offers significant autonomy and visibility for someone who wants responsibility and enjoys solving real operational and architectural challenges inside a live trading business. The environment is more heavily focused on platform engineering, workflow orchestration, systems integration, and operational robustness than ultra-low-latency optimisation.
What They’re Looking For
- Strong platform or trading systems engineering experience within hedge funds, prop trading firms, or front-office banking environments
- Deep experience developing production systems in C#
- Prior exposure to OMS/EMS platforms, execution systems, market data infrastructure, or operational trading workflows
- Strong understanding of distributed systems, integrations, and production environments
- Engineers who naturally take ownership and operate with urgency
- Strong communication skills and confidence working directly with front-office stakeholders
- Individuals who enjoy solving technically and commercially meaningful problems
What Makes Someone Successful Here
- The engineers who perform best in this environment tend to:
- Think independently
- Take initiative without waiting for direction
- Care deeply about system quality and operational stability
- Communicate confidently with both technical and non-technical stakeholders
- Enjoy understanding the business impact behind what they build
- Thrive in environments with high visibility and accountability
Interview Process
- Recruiter Screen
- Technical Assessment (C#)
- Hiring Manager Interview
- Final Onsite with engineering and trading stakeholders
Additional Information
- 4 days per week in-office
- Hybrid flexibility typically on Fridays
- Direct exposure to traders and PMs
- Significant technical ownership and autonomy
- Broad exposure across front-office trading infrastructure
This is an opportunity for a strong engineer to join a highly visible front-office engineering environment where technical quality, ownership, and commercial impact are valued equally.
Senior Platform Engineer - Front Office Trading Systems | London - Up to £350k TC employer: Mondrian Alpha
Join a leading global investment firm in London as a Senior Platform Engineer, where you'll thrive in a collaborative and ownership-driven culture that values technical excellence and commercial impact. With significant autonomy and direct exposure to traders and PMs, this role offers a unique opportunity to tackle complex engineering challenges in a dynamic trading environment, while benefiting from hybrid work flexibility and a commitment to employee growth and development.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Platform Engineer - Front Office Trading Systems | London - Up to £350k TC
✨Tip Number 1
Network like a pro! Get in touch with folks already working in the industry, especially those at firms you're eyeing. A friendly chat can lead to insider info and maybe even a referral!
✨Tip Number 2
Show off your skills! If you’ve got a portfolio or GitHub with projects related to platform engineering or trading systems, make sure to highlight that. It’s a great way to demonstrate your hands-on experience.
✨Tip Number 3
Prepare for those technical assessments! Brush up on your C# skills and be ready to discuss your past projects. We want to see how you think and solve problems, so practice explaining your thought process.
✨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, it shows you’re genuinely interested in joining our team.
We think you need these skills to ace Senior Platform Engineer - Front Office Trading Systems | London - Up to £350k TC
Some tips for your application 🫡
Show Your Technical Skills:Make sure to highlight your experience with C# and any relevant trading systems you've worked on. We want to see how your technical background aligns with the role, so don’t hold back on showcasing your achievements!
Demonstrate Ownership:We love engineers who take initiative! In your application, share examples of how you've owned complex systems or solved tricky problems in the past. This will show us that you’re ready to tackle the challenges we face.
Communicate Clearly:Since you'll be working closely with traders and PMs, it's crucial to demonstrate strong communication skills. Use your application to convey your ability to explain technical concepts to non-technical stakeholders – it’s a big plus for us!
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’re considered for this exciting opportunity. Don’t miss out!
How to prepare for a job interview at Mondrian Alpha
✨Know Your Tech Inside Out
Make sure you’re well-versed in C# and any relevant technologies mentioned in the job description. Brush up on your experience with OMS/EMS platforms and trading systems, as you'll likely be asked to discuss specific projects you've worked on.
✨Understand the Business
Since this role is closely tied to trading, take some time to understand how trading systems impact the business. Be prepared to discuss how your engineering decisions can affect traders and PMs, showing that you’re not just a techie but also commercially aware.
✨Show Ownership and Initiative
During the interview, highlight instances where you took ownership of complex problems and drove them to resolution. This role values engineers who proactively identify weaknesses and take initiative, so share examples that demonstrate your ability to think independently.
✨Communicate Effectively
Practice explaining technical concepts in a way that non-technical stakeholders can understand. You’ll need to work closely with traders and PMs, so showcasing your strong communication skills will be key to demonstrating your fit for the collaborative environment.
