.NET Developer

Capgemini; Milton Keynes; Hybrid; GBP 55,000 - 75,000; Full time

Job summary

Capgemini is seeking a .NET Developer to join the Cloud & Custom Applications practice in a hybrid role, delivering resilient enterprise solutions with React/TypeScript front-ends and .NET back-ends. You will work in multidisciplinary teams, contribute to design, testing and CI/CD, and help shape future-ready digital capabilities.

The role emphasizes hands-on coding, solution design, knowledge sharing, and adherence to engineering best practices.

Qualifications

• Proficiency in .NET Framework/.NET Core, C#, ASP.NET.
• Strong experience with React.js, TypeScript, and modern JavaScript/TypeScript development practices.
• Ability to build and maintain scalable frontend applications using React/TypeScript.
• Experience with RESTful APIs, web services, and system integration.
• Deep understanding of OOP, design patterns, SOLID principles, and architecture.
• Practical knowledge of SQL, database architecture, and relational database design.
• Familiarity with DevOps, CI/CD pipelines, and automation tools.
• Experience with NUnit or xUnit for unit testing.

Responsibilities

• Perform hands-on development using the latest versions of .NET, C#, and frontend technologies including React and TypeScript.
• Build full-stack solutions, integrating React/TypeScript UIs with .NET backend APIs.
• Apply OOP, design patterns, SOLID, and architectural patterns to deliver robust software.
• Develop high-volume, high-availability enterprise-scale applications.
• Collaborate in Agile/SCRUM delivery environments and participate in iterations.
• Design, optimize, and maintain relational database systems.
• Implement TDD, write unit tests, and support CI pipelines.
• Leverage CI/CD and automation tools for frequent releases.
• Conduct code reviews focusing on maintainability and performance.
• Produce clear technical documentation and collaborate with stakeholders.

Skills

.NET/.NET Core/C#

React.js

TypeScript

RESTful APIs

OOP/SOLID

SQL/Relational DBs

CI/CD

Unit testing (NUnit/xUnit)

Tools

Docker

Kubernetes

Git

Jenkins/GitHub Actions

Job description

About the Job you are considering:

Join the Cloud & Custom Applications (C&CA) practice as a .NET Developer, where you will help clients transform ideas into scalable business outcomes. Guided by our vision to Consult with Purpose. Continuously Evolve. Architect Tomorrow., you will contribute to the delivery of resilient, high-performing enterprise solutions within collaborative, multidisciplinary teams. This role combines hands-on software engineering with active participation in solution design, continuous improvement, and knowledge sharing. You will work closely with colleagues and stakeholders to deliver value, uphold engineering excellence, and help shape future-ready digital capabilities, while embracing innovation, AI-enabled ways of working, and a culture of continuous learning.

Hybrid working:

The places that you work from day to day will vary according to your role, your needs, and those of the business; it will be a blend of Company offices, client sites, and your home; noting that you will be unable to work at home 100% of the time.

Your Role:

• Perform hands-on development using the latest versions of .NET, C#, and frontend technologies including React and TypeScript.
• Build full-stack solutions, integrating React/TypeScript user interfaces with .NET backend APIs.
• Apply strong expertise in Object-Oriented Programming (OOP), design patterns, SOLID principles, and architectural patterns.
• Contribute to the development of high-volume, high-availability enterprise-scale applications.
• Work within Agile delivery methodologies, ideally with experience in SCRUM.
• Design, optimize, and maintain database systems, with strong understanding of relational database design.
• Implement Test-Driven Development (TDD), write robust unit tests, and support Continuous Integration pipelines.
• Leverage CI/CD and automation tools to ensure high-quality, frequent releases.
• Critically analyze system designs and provide constructive feedback to improve performance and maintainability.
• Conduct code reviews focusing on maintainability, scalability, and adherence to engineering best practices.
• Produce clear and comprehensive technical documentation.
• Collaborate effectively with both technical and non-technical stakeholders.
• Maintain strong understanding of unit testing, design patterns, and CI/CD pipelines.

Your Skills:

Proficiency in .NET Framework, .NET Core, C#, ASP.NET

Strong experience with React.js, TypeScript, and modern JavaScript/TypeScript development practices

Ability to build and maintain scalable frontend applications using React and TypeScript

Experience with RESTful APIs, web services, and system integration

Deep understanding of OOP, design patterns, SOLID principles, and architecture

Practical knowledge of SQL, database architecture, and relational database design

Familiarity with DevOps, CI/CD pipelines, and automation tools

Experience with unit testing frameworks such as NUnit or xUnit

Understanding of cloud and containerization technologies such as AWS, Docker, Kubernetes

Strong expertise with Git for version control

Good-tov-Have Skills

• Experience with React.js, TypeScript, JavaScript (ES6), HTML5, CSS3, Redux, or Context API.
• Experience with Spring Boot, Spring MVC, Spring Security, Hibernate/JPA, and REST API development.
• Knowledge of cloud platforms such as AWS, Microsoft Azure, or Google Cloud Platform.
• Experience with Docker, Kubernetes, OpenShift, and infrastructure-as-code practices including Terraform.
• Exposure to CI/CD tooling such as Jenkins, GitHub Actions, or GitLab CI.
• Experience with PostgreSQL, Oracle, MySQL, or MongoDB.
• Familiarity with Git, Maven, Gradle, SonarQube, JIRA, Splunk, or AppDynamics.
• Knowledge of event-driven architectures and messaging platforms such as Kafka.
• Exposure to API Gateway and Service Mesh technologies.
• Experience supporting cloud migration and application modernisation initiatives.
• Experience within Banking, Financial Services, or Insurance domains.
• Cloud certifications (AWS, Azure, and/or GCP).

We are a Disability Confident Employer:

Capgemini is proud to be a Disability Confident Employer (Level 2) under the UK Government's Disability Confident scheme. As part of our commitment to inclusive recruitment, we will offer an interview to all candidates who:

Please opt in during the application process.

• Declare they have a disability, and
• Meet the minimum essential criteria for the role.

Make It Real (what does it mean for you):

• You'd be joining an accredited Great Place to work for Wellbeing in 2024. Employee wellbeing is vitally important to us as an organisation. We see a healthy and happy workforce a critical component for us to achieve our organisational ambitions.
  To help support wellbeing we have trained 'Mental Health Champions' across each of our business areas, and we have invested in wellbeing apps such as Thrive and Peppy.
• You will be empowered to explore, innovate, and progress. You will benefit from Capgemini's 'learning for life' mindset, meaning you will have countless training and development opportunities from thinktanks to hackathons, and access to 250,000 courses with numerous external certifications from AWS, Microsoft, Harvard ManageMentor, Cybersecurity qualifications and much more.
• You will be joining one of the World's Most Ethical Companies, as recognised by Ethisphere for 13 consecutive years. We live our values by making ethical business choices every day. Working ethically is at the centre of our culture at Capgemini, meaning you will be helping to create a future we can all be proud of.

Why you should consider Capgemini:

Growing clients' businesses while building a more sustainable, more inclusive future is a tough ask. When you join Capgemini, you'll join a thriving company and become part of a collective of free-thinkers, entrepreneurs and industry experts. We find new ways technology can help us reimagine what's possible. It's why, together, we seek out opportunities that will transform the world's leading businesses, and it's how you'll gain the experiences and connections you need to shape your future. By learning from each other every day, sharing knowledge, and always pushing yourself to do better, you'll build the skills you want. You'll use your skills to help our clients leverage technology to innovate and grow their business. So, it might not always be easy, but making the world a better place rarely is.

About Capgemini:

Capgemini is an AI-powered global business and technology transformation partner, delivering tangible business value. We imagine the future of organisations and make it real with AI, technology and people. With our strong heritage of nearly 60 years, we are a responsible and diverse group of 420,000 team members in more than 50 countries. We deliver end-to-end services and solutions with our deep industry expertise and strong partner ecosystem, leveraging our capabilities across strategy, technology, design, engineering and business operations. The Group reported 2024 global revenues of 22.1 billion.

Make it real | www.capgemini.com