C# Developer - Front Office Trading Systems - Options Market Making

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.

Overview

Join a high-impact, agile team at the heart of our proprietary trading firm, where innovation drives success. Our Interactive Trading team operates across London, Amsterdam, and Chicago, supporting and developing cutting-edge front-office trading systems used by our options market-making team. We take ownership of proprietary systems, from robust back-end services to intuitive web-based front-ends, ensuring seamless and efficient trading operations.

The Role

We’re looking for a talented Front Office C# Developer to design and implement exceptional solutions within a collaborative and dynamic environment. You'll work directly with traders and business stakeholders, tackling complex challenges in fast-paced, high-stakes scenarios. If you thrive on problem-solving, delivering high-quality code, and making an immediate impact on trading performance, this role is perfect for you.

What You’ll Do
• Collaborate with front-office business users to gather and understand requirements.
• Design, develop, and enhance mission-critical systems with a focus on performance, maintainability, testability, and resilience.
• Write clean, high-quality code and comprehensive tests, leveraging automation to streamline processes.
• Analyse, document, and communicate design decisions effectively.
• Partner with stakeholders, Site Reliability Engineers (SREs), and infrastructure teams to ensure robust system delivery and operation.

What We’re Looking For
• Strong analytical and system design skills, with the ability to tackle complex problems.
• Expert-level C# skills, with a solid understanding of testing processes (currently using .NET 8, transitioning to .NET +).
• Experience with .NET, CI/CD pipelines, and containerization technologies like Docker and Kubernetes.

Nice to Have
• Familiarity with JavaScript, TypeScript, or other front-end technologies, demonstrating the ability to contribute to or collaborate on UI development.
• Experience programming in Python
• Experience using MongoDB and PostgreSQL
• Familiarity with event-driven architectures, Domain-Driven Design (DDD), Command Query Responsibility Segregation (CQRS), or Event Sourcing principles.

Why Join Us?
• 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