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# Senior Back-End Developer - .NET / C# -High Growth SaaS

- **Company:** Robert Half International Inc.
- **Location:** London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** .NET Framework, Application Programming Interfaces (APIs), C Sharp (Programming Language), Software as a Service, Cloud Computing, Code Review, Continuous Integration, DevOps, PostgreSQL, Redis, Systems Integration, Google Cloud, Backend, Kubernetes, Restful APIs, Docker, Microservices
- **Published:** September 17, 2026
- **Apply:** https://www.reed.co.uk/jobs/senior-back-end-developer-net-c-high-growth-saas/57357586

## About the Role

* Strong commercial C#/.NET experience
 * Microservices and REST API expertise
 * Strong PostgreSQL and Redis knowledge
 * Experience with Kubernetes / Docker / Cloud
 * Strong testing and CI/CD background
 * Technical leadership or mentoring experience
 * Fintech/payments experience highly advantageous, * C# Developer

## Description

A fast-growing fintech is building a new in-house engineering team and is looking for a Senior Back-End Developer to become a key technical hire.

You'll take ownership of a modern platform built with C#/.NET microservices, PostgreSQL, Redis and Google Cloud, helping shape architecture, engineering standards and future development., * Build and maintain C#/.NET microservices

 * Design APIs, integrations and data models
 * Develop secure, scalable payment and FX services
 * Work with PostgreSQL, Redis and Kubernetes/GKE
 * Improve CI/CD, testing, observability and reliability
 * Lead code reviews and mentor other developers
 * Work closely with DevOps, Product and Operations