Winton Capital US LLC
Senior Full Stack Software Developer, Post-Trade
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About the Role
We are seeking a Senior Full Stack Developer with strong experience in both modern web technologies and backend technologies, a talent for business processes, and a keen interest in finance. The ideal candidate is enthusiastic, collaborative, and delivery-focused, with a strong sense of ownership and ability to pick things up quickly in a fast-paced environment. They will bring both a user-centred mindset and the technical depth required to deliver robust end-to-end solutions.
You will be part of a friendly and collaborative team responsible for post-trade and reporting software development. The role involves working closely with operations, fund accounting, and other teams across the business including senior management - there is no BA layer, you will gather requirements directly from the business, design solutions, and own them end-to-end. In addition to project work, you will have regular opportunities to implement enhancements for both business and technology.
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Your Responsibilities Will Include
- Own and evolve core post-trade systems covering confirmations, trade support, treasury, corporate actions, reconciliations, limit monitoring, and fund accounting
- Design and implement backend services, APIs, and data integrations
- Build and maintain internal UIs where performance, data quality, and usability all matter
- Work across the full application lifecycle: requirements gathering, design, implementation, testing, release, and support
- Engage directly with business teams to understand requirements and translate them into thoughtful technical solutions
- Support production systems, investigate issues, and implement fixes where required
- Collaborate through code reviews, design discussions, and knowledge sharing
What We Are Looking For
- 5+ years of professional software development experience, ideally in financial services or data-intensive systems
- Strong backend capability in C#/.NET - you are comfortable designing services, APIs, and data integrations, not just consuming them
- Competent with a modern frontend framework - you can build UIs that non-technical users actually want to use
- Comfortable using agentic AI coding tools such as Claude Code and are genuinely keen to use them as a natural part of daily work
- Interest in financial markets across all asset types
- Enthusiastic, collaborative, and comfortable working closely with business stakeholders
- Strong communication skills with both technical and non-technical colleagues and a positive, can-do attitude
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What Would Be Useful
- Deep knowledge of any of: the trade life-cycle, valuation and P&L, fund accounting, margin calculation
- Familiarity with Angular (preferred), React, or another structured modern front-end framework
Technologies We Use
- Web: Angular, TypeScript
- Server-side: C#
- Data: MSSQL, PostgreSQL
- Cloud: AWS
- Deployment: Docker, Kubernetes
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