MARGO

C# / .NET Developer – Front Office, FX & Orchestrade Systems

MARGO  •  London, GB (Onsite)  •  1 month ago
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Job Description

Join MARGO in the UK (London)
MARGO is a tech-native consultancy delivering high value-added IT expertise to the financial services industry. We specialise in complex software engineering environments where performance, robustness, and scalability are critical: real-time systems, low-latency architectures, and high-throughput data processing
Joining MARGO means working in demanding Front Office and Trading IT environments while benefiting from a human-sized structure, close follow-up, and tailor-made training paths.
Business Context
You will join the FX Risk IT environment of a leading tier-1 investment bank. The team is responsible for designing and maintaining mission-critical systems supporting FX Cash (Forward, Swap, NDF) and FX Derivatives (Options, Carbon Offsets).
The environment is built around the Orchestrade vendor platform and involves close collaboration with traders, quants, and risk managers to deliver high-performance trading solutions.
We are looking for a Senior C# / .NET Developer with a strong technical background to lead the development and integration of FX trading solutions. While expertise in the Orchestrade platform is highly desirable, we are primarily seeking a high-caliber engineer who can master complex vendor APIs and provide technical leadership within a fast-paced, agile culture.
Key Responsibilities
Design & Development- System Evolution Analyse, design, and develop high-performance C# solutions for FX cash and derivative products. - Orchestrade Integration Develop code to integrate Orchestrade with connected internal systems such as Sigma, Barracuda, and Deal Hub. - Architecture Advise on the best architectural approaches for integrating vendor products with service-oriented and micro-services concepts. - Data & Middleware: Design clean interfaces and manage data flow using SQL and messaging middleware.
Engineering & Mentoring- Technical Leadership: Provide mentoring and guidance to other developers on C# best practices and FX business logic.- Delivery Ownership: Take ownership of specific project deliveries, applying agile methodologies and project management skills where required.- Quality Standards: Drive high engineering standards through continuous integration and DevOps practices.
Production & Support- Level 3 Support: Provide expert-level support for production Orchestrade systems and connected FX IT platforms.- System Controls: Ensure all developments comply with internal systems, controls, and regulatory requirements.

Technical Environment & Skills
Essential Experience
- Expert C# / .NET: Substantial experience in software development with deep knowledge of the .NET ecosystem- Investment Banking: Prior experience working in a Front Office environment alongside traders, quants, or risk managers.- Backend & Middleware: Strong understanding of SQL/RDBMS and messaging middleware. - Architecture Solid grasp of service-oriented and micro-services design concepts.

Valued Technical Exposure (Desirable)
- Orchestrade: Strong experience with Orchestrade features, configurations, and APIs.- FX Domain: Knowledge of FX Forward, Swap, NDF, and FX Options/Derivatives.- Cross-Platform: Experience with C++, Java, or FIX protocol.- Other Vendors: Familiarity with Calypso, Murex, or similar trade management products.

Why Join MARGO
Tier-1 Exposure: Work at the heart of FX Risk IT for a major global bank.Technical Growth: Highly challenging assignments bridging vendor platform expertise and bespoke C# engineering.Career Progression: Clear paths for technical leadership and architectural ownership.Mentorship Culture: Benefit from and contribute to a high-quality peer-review and mentoring environment.
Please note: We do not offer visa sponsorship for this position.
Interested? Motivated? Apply on our website or at staff.uk@margo.com
MARGO

About MARGO

More than a simple IT consulting group, MARGO is an alchemy of talents with constantly enriched expertise, always encouraged to be dynamic and to flourish.

For more than 17 years, we have been carrying out missions of the highest technical complexity, enabling the digital acceleration of our clients, while ensuring a perpetual intellectual and collective stimulation for all our talents.

At MARGO it's Consultant First.

By joining MARGO, your talent today will remain relevant tomorrow. We bring you into the group not only for what you are today but for the potential you wish to develop.

At MARGO, you will be able to build your own path to excellence within our teams and our missions. Tailor-made to serve your ambition and to match your talent.

Today, Margo has over 400 employees in 8 entities:

► MARGO Trading Systems: our full stack development offer in market finance

► MARGO Capital Markets: our business offer in market finance

► MARGO Analytics: our expertise in data science and data engineering

► A CAPELLA Consulting: our business offer dedicated to insurance

► CODE BUSTERS: our community of developers

► DELIVERED by MARGO: our 100% remote full stack development entity

► MARGO UK: expertise in complex coding and application support on the English market.

► MARGO Poland: expertise in complex coding in retail Banking on the Polish market.

Industry
IT & Software
Company Size
201-500 employees
Headquarters
Courbevoie, FR
Year Founded
2005
Website
margo.com
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