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.

Key Responsibilities:

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:
  
• Node.js / .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.