Senior Full Stack Developer | React | Angular | Vue (contract)

JobCubby; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Job summary

Deloitte in London is seeking a Senior Full Stack Developer to lead the design, development, and delivery of scalable, high-performance applications.

You will work across front-end and back-end technologies, mentor junior developers, and drive architectural and strategic decisions in a collaborative, Agile environment.

This onsite London contract role emphasizes cloud, CI/CD and strong technical leadership to deliver robust solutions.

Qualifications

• Proficiency in front-end technologies: React, Angular, Vue.
• Back-end experience: Node.js, .NET, Java or Python.
• Experience with REST APIs and GraphQL.
• Experience with cloud services (Azure or AWS).

Responsibilities

• Design, develop, and maintain full-stack applications with modern frameworks.
• Build scalable APIs, microservices, and integrations.
• Develop high-quality, responsive UI components with performance focus.
• Collaborate with Product Owners and cross-functional teams; mentor juniors.

Skills

React

Angular

Vue

JavaScript/TypeScript

Node.js

.NET

Java

Python

REST APIs

GraphQL

SQL

NoSQL

Azure

AWS

GitHub Actions

Azure DevOps

Jenkins

Docker

Kubernetes

Job description

Contract Role: Senior Full Stack Developer | React | Angular | Vue

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

Role Summary

Deloitte are looking for a highly skilled Senior Full Stack Developer to join our team and lead 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 mentor junior developers while driving architectural and strategic decisions.

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 mentorship to junior and mid-level developers.
• 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 lead technical initiatives.
• Experience working in Agile/Scrum teams.

Preferred Qualifications

• Extensive experience of 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 leading development streams| DataBricks, PowerBI, Python