AI Engineer C# Python

Client Server; Greater London; Hybrid; GBP 60,000 - 100,000; Full time

Benefits offered by this job

Bonus

Pension

Life Assurance

Critical Illness

Employee Assistance

Company Share Scheme

Paternity Leave

Wellness Benefits

Onsite Gym

Medical Insurance

Dental Insurance

25 Days Holiday

Kids Pass

Smart Tech Scheme

Volunteering Days

Job summary

Client Server is seeking a Full Stack Engineer / Developer (C# React AI) in London with WFH flexibility up to 2 days. You will contribute to backend and frontend development, embedding AI into the product using Claude while applying strong design patterns and scalable architecture.

The role offers a hybrid working pattern with three days on-site in City offices, plus perks and a competitive package. You will influence architecture and engineering practices in a small, agile team.

Qualifications

• Strong backend with C# .NET and frontend with React/TypeScript.
• Experience embedding AI into products and using design patterns.
• Solid CS fundamentals: OOP, multithreading, design patterns.
• Knowledge of cloud-native architectures and containers (Azure/AWS, Kubernetes, Docker).

Responsibilities

• Develop backend in C# .NET and frontend in React/TypeScript.
• Embed AI into software development lifecycle using Claude.
• Design and implement cloud-native services and microservices.
• Collaborate in a small team to influence architecture and practices.

Skills

C# .NET

React

TypeScript

AI integration

Cloud-native

CI/CD

Kubernetes

Docker

Terraform

OOP

Multithreading

Design Patterns

Tools

Claude

Job description

Full Stack Engineer / Developer (C# React AI) London / WFH to £100k

Are you a Full Stack Engineer with a deep knowledge of software engineering best practices and system design combined with a strong knowledge of AI agentic development?

You could be progressing your career in a senior, hands‑on Full Stack Engineer role a global reinsurance group, building the technology platform behind a diverse portfolio of insurance products used across its international businesses.

The technology team is small, agile and heavily focused on greenfield development, giving you the opportunity to have real influence over architecture, engineering practices and how AI is embedded into the software development lifecycle.

As a Full Stack Engineer, you'll be an individual contributor working primarily on backend and cloud-native development. A major part of the role will be exploring how AI can improve both engineering productivity and the products themselves - using tools such as Claude alongside strong software design principles, patterns and engineering best practice.

Location / WFH:

You’ll join colleagues in plush City offices with onsite gym and barista, three days a week, with flexibility to work from home the other two days.

About you:

• You have strong backend software engineering skills, with C# .Net, combined with front end development skills, using React, TypeScript or similar
• You're keen to use and adopt more AI into processes and the product, you understand "milestone development" and what good system design looks like, how to get the optimum results from AI with proper use of design patterns and best practices - they use Claude but open to experience with other tools
• You have a strong knowledge of Computer Science fundamentals such as OOP, multithreading, Design Patterns and are comfortable with system design
• You have a good understanding of cloud native architectures (Azure / AWS), event driven systems, microservices, CI/CD, Terraform, Kubernetes, Docker
• You're collaborative with great communication and problem solving skills, ideally with experience in a start-up / small team environment

What's in it for you:

As a Full Stack Engineer you will receive a competitive package:

• Salary to £100k
• Bonus
• Pension, Income Protection, Life Assurance, Critical Illness Cover, Employee Assistance Programme
• Company Share Scheme
• Enhanced paternity leave and benefits
• Wellness benefits such as free PT sessions at the onsite gym, massages
• Medical and Dental Health insurance
• 25 days holiday
• Perks such as "Kids Pass" for discounted days out, smart tech scheme
• Volunteering and charity days