Front Office C# .NET Developer | ETRM Integration | Azure | Energy Trading | £105,000 | Hybrid, London

Full Stack C# .NET Developer | Post-Trade Operations | ETD | Up to £140,000 | AWS | Financial Services | Hybrid, London

A Full Stack C# .NET Developer is required to join a high-performing operations technology team within one of London's most technology-driven financial services firms, operating across global commodity and derivatives markets

.
This is a full stack role with a strong C# .NET backend focus, working on operationally critical systems that support the post-trade processing of Exchange-Traded Derivatives (ETD). You'll be working across the full stack from React front-ends through to C# .NET services and data layers in a highly data-driven environment where accuracy, traceability and consistency are paramoun

t.
This is a rare opportunity for a strong technologist to move into financial services at a firm that genuinely treats technology as a core part of its business rather than a support function. Domain knowledge is not a prerequisite what matters most is full stack engineering depth, a methodical approach to data and a desire to work on complex, high-integrity systems. With a global footprint spanning 40+ offices, access to 60 exchanges, and a team of over 3,200 people, the investment in engineering talent, modern tooling and cloud-native infrastructure is substantial and ongoi

ng.
The

Team
The ETD Operations Technology team sits at the heart of the firm's post-trade ecosystem. They design and maintain the systems responsible

• for:
  Building and maintaining full stack C# .NET and React applications supporting post-trade operational wor
• kflowsProcessing and validating high-integrity transactional and position data across C# .NET se
• rvicesSupporting deliveries processing, segregation movements and settlement wor
• kflowsHandling commission and fee calculations and operational adjus
• tmentsEnsuring exchange-traded activity is accurately reflected across internal platforms and client ac

countsThe environment is data-intensive and operationally critical, built on modern C# .NET, React and AWS infrastructure. The team works closely with operations stakeholders, business analysts and QA to deliver reliable, production-grade solutions that meet strict regulatory and compliance stan

dards.
Role

Details
💰 Up to £140,000 + Benefits 💻 Tech Stack: C# | .NET | React | TypeScript | AWS | Docker | Terraform | SQL | NoSQL | CI/CD 🏢 Hybrid working

| London
As a Full Stack C# .NET Developer,

• you will:
  Design, build and test full stack C# .NET and React applications within a post-trade processing e
• nvironmentDevelop modern, responsive React front-ends that surface complex operational and position data to busi
• ness usersDevelop and maintain high-integrity C# .NET backend services handling positions, balances, cash movements and fee ca
• lculationsWork with large volumes of structured transactional and position data, ensuring accuracy and consistency across downstre
• am systemsContribute to architecture and design decisions across the
• full stackWrite clean, maintainable and testable code across C# .NET and React, adhering to BDD/TDD
• practicesEnsure solutions meet regulatory and compliance requirements across applicable exchanges and clearing frameworks including FCA, SEC, CF
• TC and NFASupport and improve CI/CD pipelines and DevOps practices across the
• full stackLiaise with operations stakeholders and business analysts to translate requirements into robust full stack
• solutionsWork closely with compliance and risk teams to ensure data integrity, traceability and auditability across a

ll systems
Required

• Experience
  Strong commercial experience as a Full Stack C# .N
• ET DeveloperHands-on experience building React front-ends, ideally wit
• h TypeScriptExperience working with high-volume transactional or position data in an operationally critical
• environmentExperience with Docker and cont
• ainerisationExperience with NoSQL or relational databases, with an understanding of data integrity and consiste
• ncy patternsInfrastructure as Code experience, ideal
• ly TerraformSolid understanding of modern CI/CD and DevO
• ps practicesExperience with AWS or equivalent clou
• d technologyKnowledge of BDD/TDD m
• ethodologiesExperience working in Agile/Scrum delivery

environments
Desirab

• le Experience
  Experience working in a regulated financial services environment with exposure to FCA, SEC, CFTC or NFA complianc
• e requirementsKnowledge of Exchange-Traded Derivatives (ETD) operations or post
• -trade systemsFamiliarity with deliveries processing, settlement workflows, reconciliation processes or client mon
• ey segregationExperience building or maintaining data pipelines handling margin outputs, cash movements or fe
• e calculationsExposure to JavaScript and/or TypeScript in a full
• stack contextExperience with Node.js