Full Stack Engineer

Sellick Partnership; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Job summary

Sellick Partnership seeks an SC-cleared Full Stack Software Engineer to design, develop and maintain secure cloud-native apps in London. You will work across frontend and backend with TypeScript, Kubernetes and modern frameworks, delivering REST APIs and microservices in a hybrid London pattern.

The role requires expert TS, strong full-stack experience, and hands-on DevSecOps practices in AWS or Azure, with Docker, CI/CD, and collaboration across DevOps and architecture teams.

Qualifications

• Active SC clearance is mandatory.
• Expert-level TypeScript experience.
• Strong full-stack development background.
• Frontend: React, Angular or Next.js.
• Backend: Node.js, Java or Python.
• Experience designing REST APIs and microservices.
• Cloud experience with AWS and/or Azure.
• Infrastructure as code with Terraform.
• Experience with Docker and CI/CD pipelines.
• Delivery experience in security-cleared environments preferred.

Responsibilities

• Build and integrate backend services, REST APIs and microservices.
• Develop, deploy and maintain containerised apps using Kubernetes and Docker.
• Design and implement secure, cloud-native architectures.
• Work in AWS and/or Azure cloud environments.
• Implement and improve CI/CD pipelines for automated testing and deployment.
• Collaborate with DevOps, architects, testers and wider development teams.
• Follow software engineering best practices: clean code, automated testing, TDD and code reviews.
• Troubleshoot and resolve issues across apps and infrastructure.
• Ensure solutions meet security, performance and scalability requirements.

Skills

Active SC Clearance

Tools

TypeScript

Kubernetes

React

Angular

Next.js

Node.js

Java

Python

Docker

AWS

Azure

Terraform

Git

CI/CD

GitHub Actions

GitLab CI/CD

Jenkins

DevSecOps

REST APIs

Microservices

Job description

SC Cleared Full Stack Software Engineer – TypeScript / Kubernetes

Location: London – Hybrid (3 days onsite per week)

Security Clearance: Active SC Clearance required

The Opportunity

We are looking for an experienced SC Cleared Full Stack Software Engineer to join a major UK Government technology programme.

You will be responsible for designing, developing and maintaining secure, scalable, cloud-native applications, working across frontend and backend technologies within a modern engineering environment.

This is a hands‑on engineering position requiring strong commercial experience with TypeScript and Kubernetes, alongside a solid understanding of full‑stack software development, cloud infrastructure and modern DevOps practices.

Key Responsibilities

• Build and integrate backend services, REST APIs and microservices.
• Develop, deploy and maintain containerised applications using Kubernetes and Docker.
• Contribute to the design and implementation of secure cloud‑native architectures.
• Work with AWS and/or Azure cloud environments.
• Implement and improve CI/CD pipelines to support automated testing and deployment.
• Collaborate with DevOps engineers, architects, testers and wider development teams.
• Follow software engineering best practices, including clean code, automated testing, TDD and code reviews.
• Troubleshoot and resolve technical issues across application and infrastructure environments.
• Ensure solutions meet security, performance and scalability requirements.
• Active SC Clearance – mandatory.
• Expert-level TypeScript experience – mandatory.
• Strong commercial experience as a Full Stack Software Engineer.
• Hands‑on experience with modern frontend frameworks such as React, Angular or Next.js.
• Backend development experience using Node.js, Java, Python or similar technologies.
• Experience designing and developing REST APIs and microservices.
• Strong understanding of cloud-native application architecture.
• Experience working with AWS and/or Azure.
• Experience with Docker, Git and CI/CD pipelines.
• Strong software engineering fundamentals and experience working in Agile environments.
• Previous delivery experience within UK Central Government, Defence or other security‑cleared environments.
• Infrastructure as Code using Terraform.
• Experience with GitHub Actions, GitLab CI/CD or Jenkins.
• Experience working with secure, highly available distributed systems.
• Familiarity with DevSecOps practices and automated security testing.
• Location: London
• Working Pattern: 3 days onsite, 2 days remote
• Duration: ASAP until April 2027
• Clearance: Active SC required