---
title: 'C# / .NET Developer – Front Office, FX & Orchestrade Systems at MARGO'
canonical: 'https://feeny.ai/job/c-net-developer-front-office-fx-orchestrade-systems-margo-london-xgqjbcrvs446'
type: 'job'
last_seen: '2026-09-07'
---

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

- **Company:** MARGO
- **Location:** London, United Kingdom
- **Employment:** contract
- **Work type:** hybrid
- **Posted:** 2026-01-30
- **Last confirmed live:** 2026-09-07
- **Apply:** https://jobs.lever.co/margo-group/9d69f9f8-294b-497a-b83f-a81f9e4c3167

## 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.

## Role Overview

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

## About MARGO

## Company Overview
- **One-liner**: MARGO is an international technology engineering and AI consulting group that transforms technological complexity into business performance for global leaders in finance, insurance, energy, manufacturing, and tech.
- **Entity Type**: Private (100% organically grown, no external funding disclosed)
- **Headquarters**: Paris, France (with offices in London and Warsaw)
- **Founded**: 2005
- **Founders**: Olivier Hemar and Xavier Lagarrigue

## Core Business
- **Primary industries**: Data, Cloud, and AI consulting; IT engineering services
- **Target customers**: B2B – large enterprises and global leaders in Finance, Insurance, Energy, Manufacturing, and Technology
- **Mission/purpose**: To solve highly complex IT challenges by combining engineering excellence with world-class partner solutions, transforming technological complexity into business performance and competitive advantage.

## Products & Services
- **Data, Cloud & AI Architecture Consulting**: Design and deployment of critical data, cloud, and AI architectures for high-stakes environments. Service type: Consulting & Engineering Services.
- **Hyper-specialized IT Consulting**: Focus on highly complex IT projects where the complexity of the mission correlates with its value. Service type: Consulting.

## Market Standing
- **Valuation/Market Cap**: Not publicly available (private company)
- **Key Metric**: €45M turnover in 2025 (annual revenue)
- **Notable Investors/Partners**: No external investors cited; company is 100% organically grown. Partners include global technology leaders (e.g., cloud and data platform providers).
- **Growth Signals**: 19+ consecutive years of growth; expanded from Paris to London and Warsaw with a team of 450; 34% of consultants from Tier 1 universities; certified Great Place to Work (Top 30 in France).

## Competitive Advantages
- **Hyper-specialization**: Focuses exclusively on highly complex IT projects, avoiding volume-driven commodity consulting.
- **Elite talent pool**: 34% of consultants from top-tier engineering schools (Polytechnique, CentraleSupélec, Télécom Paris, ENSIMAG) – 15% above market average.
- **Strong culture of excellence**: Peer-led EXCELLENCE Hub delivers 726 coaching sessions/year, 35 Learning Expeditions, one certified training per employee per year.
- **100% organic growth** since 2005, demonstrating a resilient and independent business model.

## Strategic Focus
- Continue organic growth by deepening relationships with key accounts in finance, insurance, and industry.
- Invest in the EXCELLENCE Hub to further develop technical skills and personal branding (e.g., speaking at Devoxx, ACCU, CppCon).
- Expand the hybrid work model that balances in-person collaboration (headquarters in La Défense, Paris) with remote flexibility.
- Maintain a selective project portfolio – prioritize quality and intellectual challenge over volume.

## Why Work Here
- **Culture**: Emphasizes excellence, exemplarity, and ambition. Peer-led acceleration with continuous learning (Learning Lunches, meetups, certifications). Encourages personal branding and thought leadership.
- **Work environment**: Hybrid approach – offices in La Défense (27th floor of Tour Aurore) with collaborative spaces, auditorium, rooftop terrace, and private gym. On-site presence is valued for social cohesion and innovation.
- **Perks**: Guaranteed certified training each year; sports communities (Running, Football, Yoga); participation in major events like Marathon de Paris. Great Place to Work certified (Top 30 in France with 83% employee approval).
- **Hiring process**: 3-step recruitment (Talent Acquisition + Business Developer, technical employee interview with logic exercises and algorithmic challenges, Head of Department final round). AI tools may be used in application review.

## Sources
1. [margo.com – Company overview](https://www.margo.com/en/accueil-english/)
2. [margo.com – Company Life](https://www.margo.com/en/company-life/)
3. [margo.com – DNA & History](https://www.margo.com/en/dna-margo-en/)
4. [margo.com – Recruitment process](https://www.margo.com/en/recruitment-process/)
5. [jobs.lever.co – MARGO careers page](https://jobs.lever.co/margo-group)

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