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# C# Developer .Net AWS - Finance

- **Company:** Client Server
- **Location:** London, UK (Remote available)
- **Experience:** Expert
- **Salary:** £80,000.0 - £90,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Amazon Web Services, Microsoft Azure, Big Data, C Sharp (Programming Language), Cloud Computing, Continuous Integration, Software Design Patterns, SQL Databases, Low Latency, Apache Flink, Api Design, Terraform
- **Published:** July 15, 2026
- **Apply:** https://www.client-server.com//job/senior-c-developer-net-aws-finance-1/apply

## About the Role

* You have strong C# .Net skills and a good understanding of design patterns such as SOLID, DRY and KISS Design Principles
 * You've worked on systems that require high throughput, low latency and scalability and understand the challenges involved (finance experience not required)
 * You have strong experience of building APIs
 * You have SQL experience
 * You have a good understanding of CI/CD and Infrastructure as Code (Terraform)
 * You have cloud experience with AWS (will also consider Azure)
 * You're familiar with other languages such as Java and are open to learn new things
 * You're comfortable with using agentic AI and tools to help improve productivity
 * You're collaborative with great communication skills, happy to mentor more junior developers

## Description

Senior C# Developer / Software Engineer (C# .Net AWS) London to £90k

Are you a technologist who enjoys contributing to technical discussions and using the best tool for the job?

You could be progressing your career at a global, financial Market Data provider whilst enjoying a range of perks and benefits.

As a Senior C# Developer you will collaborate with DevOps and Product Management within an Agile team environment working on a Greenfield Market Data platform. The platform has been built with C# deploying to AWS and requires high scalability and low latency - they currently handle 40 billion messages per day.

You'll work across the full development lifecycle, from requirements and design through to production, providing subject matter expertise on the .Net stack and contributing to technical design discussions. You'll use a range of technology including Apache Flink with Java for large scale data processing and will be able to assess and recommend new and emerging technologies, using the best tool for the job.


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