Senior Software Engineer - C#.NET

Senior Software Engineer (.NET/AWS)

Salary: Up to £110,000
Location: Central London (3 days per week in-office)

A leading financial services technology organisation is looking for a Senior Software Engineer to help build and evolve high-performance, cloud-native systems that underpin critical pricing and trading workflows.

This is a hands-on senior role where you'll take ownership of Back End services, influence technical direction, and mentor other engineers, all while working with modern cloud and DevOps tooling.

What you'll be doing

  • Designing, building and maintaining modern .NET services in a cloud-first environment

  • Developing scalable, resilient microservices running on AWS

  • Working closely with product, BA and delivery teams to turn complex requirements into clean, well-structured solutions

  • Driving code quality, test automation and CI/CD best practices

  • Monitoring and improving system performance, reliability and security

  • Supporting and mentoring engineers across the team

Tech environment (core focus)

  • .NET/C# (modern versions)

  • AWS (broad service usage, cloud-native design)

  • SQL/relational databases (strong schema and query design required)

  • Microservices architecture

  • CI/CD pipelines & Git-based workflows

Nice-to-haves/big pluses

  • Docker for containerisation

  • Kubernetes (hands-on or strong working knowledge)

  • Infrastructure as Code (eg AWS CDK, Terraform or similar)

  • Experience in highly regulated or mission-critical systems

What they're looking for

  • Proven experience as a Senior .NET Engineer in complex, production environments

  • Strong cloud engineering mindset with real-world AWS experience

  • Someone who cares about clean code, testing and long-term maintainability

  • Confident communicator who can work across technical and non-technical teams

  • Comfortable balancing hands-on delivery with technical leadership

Why this role?

  • Technically challenging systems with real business impact

  • Modern cloud stack with room to influence architecture

  • Sensible hybrid working: 3 days per week in a Central London office

  • Competitive salary up to £110,000 plus benefits

Apply Now
Apply Now

Job Details

Company
Spencer Rose Ltd
Location
London, United Kingdom
Hybrid / Remote Options
Employment Type
Permanent
Salary
GBP 110,000 Annual
Posted