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Principal C# Developer - SGI

SGILondon🇬🇧United KingdomPosted 25 Jul 2026

Quick Overview

Work Type
Hybrid
Schedule
Full Time
Level
Leader

Job Description

Principal C# / .NET Engineer - Development Lead

Initial 6 month contract 
Start date - ASAP
London - Hybrid 

What you'll be doing:

  • Leading solution design and hands-on development in C# / .NET
  • Working across MongoDB, SQL Server, and enterprise messaging (Kafka / ActiveMQ)
  • Supporting migration to OpenShift/Kubernetes-based container platforms
  • Mentoring developers and setting engineering direction
  • Applying modern engineering practices SOLID, microservices, contract-first API design
What we're looking for:
  • Expert C# / .NET, with strong .NET Core / modern .NET experience
  • Proven track record as a senior developer, tech lead, or principal engineer
  • Strong document database (MongoDB) and relational database/SQL skills
  • Experience with container platforms (OpenShift/Kubernetes preferred)
  • Comfortable operating in a regulated, delivery-focused environment
  • Financial services background is essential 




By applying for this role, you consent to SGI contacting you by telephone regarding recruitment services, market updates, and relevant business opportunities

We believe in equal opportunity for all and actively encourage applications from diverse backgrounds, experiences, and perspectives.
Source Group International Ltd is acting as an Employment Business in relation to this vacancy 

Skills

Microservices
MongoDB
SQL
SQL Server
C#
.NET
Kafka
Kubernetes

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