Senior Full Stack Engineer - Fintech / Hedge Fund Technology - Up to £140k + bonus

Saragossa; Greater London; On-site; GBP 75,000 - 120,000; Full time

Job summary

Saragossa is building core technology inside a focused, high-calibre team in a fully office-based setting in the Greater London area. You will work directly with the CEO and CTO, shaping decisions and leading meaningful work that spans front-end UI and back-end services with C# and .NET.

You’ll translate between portfolio managers and business users, taking ownership of challenging problems and delivering tangible impact.

Qualifications

• Experience delivering senior responsibilities in hedge fund technology and strong C#/.NET background.
• Fluency with SQL Server and relational databases.
• Ability to translate between technical and financial stakeholders.

Responsibilities

• Own senior work streams and guide critical pieces of work.
• Collaborate directly with CEO/CTO and business users to shape solutions.
• Communicate clearly across technical and financial domains and take ownership of outcomes.

Job description

Build core technology inside a fund ecosystem where your work is felt immediately.

This is not a large engineering org where your contributions disappear into a backlog. The tech team is small, the environment has a startup feel, and the business is established and well-funded. What you build matters, and the people setting the direction are right next to you.

You'll work directly with the CEO and CTO and be involved in shaping decisions, not just executing them. Your visibility here is high from the start.

The technical scope is broad. You are building across multiple areas of hedge fund technology, which means genuinely varied and interesting problems. You are working across the full stack, from robust back-end services through to the UI (React or other modern front-end frameworks), using C# and .NET with strong relational database work in SQL Server at the core. You are also someone who is comfortable using agentic development tools like Claude Code or Codex as part of how you work day to day.

You communicate clearly with portfolio managers and business users, translating between the technical and the financial without losing either side. You're also used to taking ownership, leading pieces of work, and being the person others look to for direction on the harder problems.

This suits someone who has experience carrying senior responsibility and wants to do that inside a focused, high-calibre team rather than a large organisation where everything moves slowly.

This one is fully office-based, where you'll get the most of out working in a close knit technology team.

Ready to build something that actually matters?