Senior Functional Programmer (Haskell)

Senior Functional Programmer - Haskell, OCaml, Scala, Linux, F#, Financial Markets, Openshift, Kubernetes

I am working with a leading financial services firm who is seeking a Senior Haskell Developer to join a specialist team developing cross-product transactional pricing systems for derivatives.

This is a rare opportunity to work with a production-grade Haskell codebase, delivering high-performance backend systems that support real-time pricing and trading.

Key Responsibilities:

• Design, develop, and maintain backend services for derivatives pricing using Haskell
• Lead the implementation of new features and performance enhancements
• Collaborate with business analysts and global stakeholders to deliver value-driven solutions
• Contribute to system architecture and technical direction of the platform
• Engage in code reviews, pair programming, and continuous improvement initiatives
• Support production systems and deployment pipelines alongside DevOps teams
• Mentor junior developers and promote best practices in functional programming
• Apply financial domain knowledge in derivatives pricing and risk management

Key Skills:

• Proficient in functional programming (Haskell is preferred, OCaml/Scala also considered)
• Experience building scalable, high-performance backend/server-side applications
• Strong understanding of architecture and system design principles
• Comfortable working in Linux environments and agile development settings
• Financial markets experience (particularly derivatives) is advantageous
• MSc or PhD in Computer Science, Mathematics, Physics, or another STEM field is preferred, but not essential with relevant experience

This is a full time role, with flexibility for hybrid working in their London office, 1 or 2 days per week. The salary on offer is up to £115k and a total comp of up to £160k.

If you are interested or know someone who might be please reach out.

Senior Functional Programmer - Haskell, OCaml, Scala, Linux, F#, Financial Markets, Openshift, Kubernetes