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.