Senior Software Engineer

Computer Network Defence Ltd (CND); Bradley Stoke; On-site; GBP 65,000 - 90,000; Full time

Job summary

Computer Network Defence Ltd (CND) in Cheltenham is seeking a Software Engineer to build secure, mission-critical Android applications and robust backend services, with SC Clearance preferred. You'll work across Kotlin, Android, Rust/Python/Go, and modern web APIs, collaborating with cross-functional teams to deliver secure solutions from concept through deployment.

The role emphasizes ownership, innovation, and engineering best practices within highly regulated environments, with a tech stack

Qualifications

• Proficient Kotlin Android development with a focus on robust apps.
• Experience with Git and modern development workflows.
• Exposure to backend languages (Rust, Python, Go) and APIs design.

Responsibilities

• Develop robust Android applications using Kotlin and Jetpack Compose.
• Build scalable backend services using Rust, Python, or Go.
• Design and consume web APIs and modern architectures.
• Work with Docker, CI/CD and DevOps best practices.
• Collaborate with cross-functional teams to solve complex challenges.
• Develop proof-of-concept apps and iterate as requirements evolve.
• Participate in code reviews and promote engineering best practices.
• Contribute to secure software delivery within highly secure environments.

Skills

Kotlin

Android development

Git

MVVM

OpenAPI / APIs

Communication skills

Adaptability

Tools

Docker

CI/CD

DevOps pipelines

Rust

Python

Go

Jetpack Compose

Job description

Software Engineer | Cheltenham | Permanent | SC Clearance

Build secure, mission-critical technology that makes a real-world impact.

We're seeking a Software Engineer with strong Kotlin and Android development experience to join a high-performing team delivering innovative digital solutions within secure environments. You'll work alongside talented engineers, architects, and delivery specialists to develop technology that enables faster, smarter, and more secure decision-making for critical operations.

This is an opportunity to work on challenging projects where innovation, collaboration, and technical excellence are valued. You'll be trusted to take ownership, contribute ideas, and help shape solutions from concept through to deployment.

What You'll Be Doing

• Developing robust Android applications using Kotlin and Jetpack Compose
• Building scalable backend services using Rust, Python, or Go
• Designing and consuming web APIs and modern software architectures
• Working with Docker, CI/CD pipelines, and DevOps best practices
• Collaborating with cross-functional teams to solve complex technical challenges
• Developing proof-of-concept applications and rapidly iterating as requirements evolve
• Participating in code reviews and driving engineering best practices
• Contributing to secure software delivery within highly secure environments

What We're Looking For

• Strong commercial Kotlin development experience
• Android application development expertise
• Experience with Git and modern software development workflows
• Understanding of MVVM, UDF, OpenAPI, APIs, and software design principles
• Exposure to backend development using Rust, Python, or Go
• Experience with Docker, CI/CD pipelines, and automated testing
• Excellent communication and collaboration skills
• Ability to adapt quickly, learn new technologies, and thrive in fast-paced environments

Desirable Experience

• Jetpack Compose
• Secure development practices
• DevOps and cloud-native technologies
• Experience delivering software within Defence, National Security, or other highly regulated environments

Why Apply?

• Work on meaningful projects supporting critical operations
• Cutting-edge technology stack across mobile, backend, and DevOps
• Collaborative engineering culture with genuine autonomy
• Opportunities to learn, innovate, and influence technical direction
• Join a team that values problem-solvers, ownership, and continuous improvement