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Software Developer C# Python SQL - Finance Data

Client Server· London, England, United Kingdom· Up to £150,000/yr
Posted 16 Jun 2026Python Developer
Client ServerRecruitment agencyfounded 1999
Levels.fyi · global comp
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Software Developer / Engineer (C# Python SQL) London / WFH to £150k+

Are you a data savvy Software Developer with C# and Python coding skills?

You could be joining a Hedge Fund with complex work and substantial bonus earning potential.

As a Software Developer you will join a growing team building a modern medallion architecture data platform, working across everything from data engineering and distributed systems to infrastructure and frontend. This is a hands-on role in a small, collaborative team where you'll have real ownership and impact.

Your role:

Design and build data platform components using C# and Python

Develop and optimise ETL pipelines, Data Lakes/ Lakehouses and distributed systems

Improve infrastructure, observability and CI/CD practices

Maintain and evolve existing systems (microservices, ETL, Excel add-ins)

Support platform operations, ensuring reliability and performance

Location / WFH:

You'll join colleagues in the impressive Central London office with flexibility to work from home once a week.

About you:

You have strong backend development experience with both C# and Python

You have experience of designing and operating data-intensive and distributed systems

You have a strong knowledge of databases (Relational, NoSQL and Columnar)

You're keen to take ownership and work across the full development lifecycle

You have experience of working with financial or market data

You're collaborative and pragmatic with strong stakeholder management skills

What's in it for you:

As a Software Developer / Engineer (C# Python SQL) you will receive a competitive package:

Salary to £150k

Bonus

Pension

Self development and career progression opportunities

Apply now to find out more about this Software Developer / Engineer (C# Python SQL) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.