Senior Software Engineer C# Python AI

Company: Client Server
Apply for the Senior Software Engineer C# Python AI
Location: London
Job Description:

Overview

In this Senior Software Engineer role you will shape backend systems and cloud-native services for a global reinsurance platform. You’ll work in a small, agile tech team with strong influence on architecture and engineering practices, while embedding AI into the development lifecycle. You’ll focus on backend work (C# and/or Python) and explore AI-enabled productivity and product enhancements using Claude and other tools. This role blends hands-on coding with system design in a fast-moving, greenfield environment.

Pay / Benefits

  • Bonus
  • Pension
  • Life Assurance
  • Critical Illness Cover
  • Medical and Dental Health insurance
  • 25 days holiday

Responsibilities

  • Develop and maintain backend/cloud-native services with C# and/or Python
  • Influence architecture and engineering practices in a small, agile team
  • Embed AI into the software development lifecycle and product workflows
  • Design robust, scalable systems with a focus on frontend-backend connectivity
  • Collaborate across teams to align on microservices, CI/CD, and cloud-native patterns
  • Explore AI-driven improvements to productivity and product features using Claude
  • Operate as an individual contributor with strong problem solving and communication skills
  • Support and implement best-practice design patterns and engineering standards

Key requirements

  • Strong backend software engineering skills (C# and/or Python)
  • Solid CS fundamentals (OOP, multithreading, design patterns) and system design experience
  • Experience with cloud-native architectures (Azure or AWS), event-driven systems, microservices
  • Proficiency in CI/CD, Terraform, Kubernetes, Docker
  • Understanding of frontend considerations and connectivity (React or Angular preferred)
  • Interest in applying AI to processes and products; experience with Claude or similar tools is a plus
  • Collaborative mindset with good communication and problem-solving abilities
  • Start-up/small team experience would be beneficial
  • collaborative
  • strong communication
  • problem solving
  • C#
  • Python
  • AI integration (Claude)

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Posted: September 14th, 2026