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 | NoSQ
L | CI/CD
🏢 Hybrid workin
g | 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
* environmentDevelop modern, responsive React front-ends that surface complex operational and position data to bu
* siness usersDevelop and maintain high-integrity C# .NET backend services handling positions, balances, cash movements and fee
* calculationsWork with large volumes of structured transactional and position data, ensuring accuracy and consistency across downst
* ream systemsContribute to architecture and design decisions across th
* e full stackWrite clean, maintainable and testable code across C# .NET and React, adhering to BDD/T
* DD practicesEnsure solutions meet regulatory and compliance requirements across applicable exchanges and clearing frameworks including FCA, SEC,
* CFTC and NFASupport and improve CI/CD pipelines and DevOps practices across th
* e full stackLiaise with operations stakeholders and business analysts to translate requirements into robust full sta
* ck solutionsWork closely with compliance and risk teams to ensure data integrity, traceability and auditability across
all systems
Requir
* ed Experience
Strong commercial experience as a Full Stack C#
* .NET DeveloperHands-on experience building React front-ends, ideally w
* ith TypeScriptExperience working with high-volume transactional or position data in an operationally critic
* al environmentExperience with Docker and co
* ntainerisationExperience with NoSQL or relational databases, with an understanding of data integrity and consis
* tency patternsInfrastructure as Code experience, ide
* ally TerraformSolid understanding of modern CI/CD and De
* vOps practicesExperience with AWS or equivalent cl
* oud technologyKnowledge of BDD/TDD
* methodologiesExperience working in Agile/Scrum deliver
y environments
Desir
* able Experience
Experience working in a regulated financial services environment with exposure to FCA, SEC, CFTC or NFA complia
* nce requirementsKnowledge of Exchange-Traded Derivatives (ETD) operations or po
* st-trade systemsFamiliarity with deliveries processing, settlement workflows, reconciliation processes or client m
* oney segregationExperience building or maintaining data pipelines handling margin outputs, cash movements or
* fee calculationsExposure to JavaScript and/or TypeScript in a fu
* ll stack contextExperience with Node.j
s and/or GraphQL
Full Stack C# .NET Developer | Post-Trade Operations | ETD | Up to £140,000 | AWS | Financial Services
| Hybrid, London