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:
• 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.