C# Developer - Post Trade Services

Mavensecuritiesholdingltd

London Remote permanent

Posted: December 16, 2025

Job Description

ABOUT THE COMPANY:

Maven is a market-leading proprietary trading firm allocating internal capital across discretionary, systematic, and market-making strategies. Our collective expertise spans traders, engineers, and technologists, unified by an unwavering dedication to enhance our efficiency as a premier liquidity provider for globally listed derivatives. We leverage groundbreaking execution and pricing technologies to elevate and improve how financial markets operate.

Core Tech design, builds and runs the Core Platforms and its architecture at Maven. It provides applications, services and libraries upon which the whole business depends. The team’s main responsibility is for middleware and backend services; we also develop full-stack solutions, including web-based front-ends.

The Role:

An opportunity to create outstanding solutions within a highly skilled, supportive and multi-disciplinary team, developing and improving to reach your full potential. You should be passionate about quality, and able to work on fast-paced projects which have direct impact to our trading activities. Team dynamics are crucial to us whereby we recognise the value of strong individual contributions.

What you’re going to do:

• Design and develop sound solutions to support critical business functions with a focus on testability, maintainability, performance and resilience

• Craft great code and tests, using automation as your friend

• Analyse, capture and communicate your design decisions

• Interact and collaborate with stakeholders, SRE’s and Infrastructure engineers

What you’re going to need:

• Strong analytical and system design skills

• Excellent C# ability including strong focus on testing processes

• .NET Core; CI/CD, containerization (Docker and/or Kubernetes)

Nice to have:

• Modern Front-end UI development experience, especially React and TypeScript

• Event-driven design, DDD, CQRS and/or EventSourcing experience for Multithreading, distributed design, message queues (e.g. Kafka, RabbitMQ), fault-tolerance, Prometheus, Grafana

WHAT WE CAN OFFER YOU

• Competitive compensation

• Group Pension plan

• Annual discretionary bonus

• Fully catered breakfast, lunch and snacks.

• 25 days’ annual leave

• Informal dress code

• Private healthcare and life assurance

• Cycle-to-work scheme

• Monthly company events

• Private Gym

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