Full Stack Developer (React) | London | Contract

Contract Role: Full Stack Developer (React)
Contract Location: London 4-5 days onsite each week
Contract Start: Starting ASAP (inside IR35)
Contract duration: End of 2026

Payroll provider: Rockford Payroll Info for Contingent Workers Rockford Pay

Deloitte are seeking a highly skilled Full Stack Developer to join our team and contribute to the design development and delivery of scalable high-performance applications. The ideal candidate has strong expertise in both front-end and back-end technologies experience with cloud platforms and the ability to collaborate effectively across teams while supporting technical delivery.

Technical Delivery

• Design develop and maintain full-stack applications using modern frameworks and technologies.
  
• Build scalable APIs microservices and integrations.
  
• Develop high-quality responsive UI components with an eye for performance and usability.
  
• Optimize system performance reliability and scalability.
  

Architecture & Design

• Contribute to application architecture decisions and long-term technology strategy.
  
• Create technical designs sequence diagrams and solution documentation.
  
• Implement coding standards best practices and reusable components.
  

Cloud & DevOps

• Utilize CI/CD pipelines for end-to-end automation.
  
• Work with cloud platforms (e.g. Azure/AWS/GCP) for application hosting and deployments.
  
• Manage application monitoring logging and performance tuning.
  

Collaboration & Leadership

• Work closely with Product Owners Designers and cross-functional teams to deliver features.
  
• Perform code reviews and provide technical guidance to junior developers as needed.
  
• Participate in sprint planning grooming estimation and Agile ceremonies.
  

Required Skills & Experience

Technical Expertise

• Strong proficiency in front-end technologies:
  React / Angular / Vue
• HTML5 CSS3 JavaScript/TypeScript
  
• Solid experience in back-end technologies:
  
• / .NET / Java / Python
  
• REST APIs GraphQL
  
• Strong understanding of databases:
  
• SQL (PostgreSQL MySQL SQL Server)
  
• NoSQL (MongoDB Cosmos DB DynamoDB)
  
• Hands-on experience with cloud services ideally Azure or AWS.
  
• Experience with CI/CD pipelines (GitHub Actions Azure DevOps Jenkins etc.).
  
• Containerization & orchestration (Docker Kubernetes) is a plus.
  

Soft Skills

• Strong problem-solving abilities and analytical thinking.
  
• Excellent communication and stakeholder engagement skills.
  
• Ability to work independently and support technical initiatives.
  
• Experience working in Agile/Scrum teams.
  

Preferred Experience

• Significant professional full-stack development experience.
  
• Experience with microservices event-driven architectures or serverless technologies.
  
• Exposure to security practices OAuth2 SSO and secure coding principles.
  
• Prior experience mentoring teams or supporting development streams.