Full Stack Engineer - Agentic AI, React, Javascript

GCS Recruitment; Greater London; On-site; GBP 70,000 - 110,000; Full time

Job summary

GCS Recruitment is seeking a highly skilled Senior Fullstack Developer with deep React expertise and a strong track record deploying scalable, high-performance web applications to cloud platforms, ideally Microsoft Azure.

You will work with backend engineers, cloud specialists, and AI teams to deliver production-ready solutions, integrating AI-driven components and ensuring robust CI/CD and Docker-based deployments.

Qualifications

• Senior fullstack development experience with React and Python.
• Proven cloud deployment experience, preferably Azure.
• Experience with front-end performance optimization and large data handling.

Responsibilities

• Design, build, and maintain scalable front-end apps using React and Python.
• Improve data throughput, performance, and responsiveness at scale.
• Collaborate on deploying apps to cloud environments (Azure preferred).
• Integrate front-end with AI-powered services and APIs.
• Support containerised deployments and CI/CD pipelines.
• Work with Docker and cloud-native deployment processes.

Skills

React

Python

Cloud deployment

API integration

Tools

Docker

Azure

AWS

Job description

Role Description

We are seeking a highly skilled Senior Fullstack Developer with deep expertise in React and strong experience deploying applications to cloud platforms, ideally Microsoft Azure (AWS experience also welcome). This role will focus on building, deploying, and optimising scalable, high-performance web applications that handle large volumes of data and integrate AI-driven components. You will work closely with backend engineers, cloud specialists, and AI teams to deliver intelligent, production- ready applications at scale.

Key Responsibilities

• Design, build, and maintain scalable front-end applications using React, python and modern JavaScript/TypeScript.


• Build front-end solutions that support high data throughput, performance optimisation, and responsiveness at scale.


• Collaborate on the deployment of applications to cloud environments (Azure preferred; AWS acceptable).


• Integrate front-end applications with AI-powered services, including LLM-based APIs and workflows and Agentic AI systems


• Automation and orchestration services (particularly within Azure)


• Work with containerised environments (e.g. Docker) and contribute to cloud-native deployment pipelines.


• Support CI/CD processes and promote reliable, repeatable deployments.

Required Skills / Experience

• Extensive experience as a Senior fullstack Developer or similar role.


• Expert knowledge of React & Python, including modern patterns, hooks, state management, and performance optimisation.


• Proven experience deploying applications to cloud platforms, ideally Microsoft Azure.


• Experience integrating front-end applications with APIs, microservices, and distributed systems.


• Familiarity with container technologies such as Docker and container-based deployment models.


• Experience working on applications that handle large datasets or high-traffic environments.


• Strong understanding of front-end performance, observability, and optimisation techniques