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Addition

Android Developer

Addition
United Kingdom · Full-time · Mid-Senior

A specialist digital innovation partner is building secure, mission-critical technology that supports Defence and National Security operations. They solve complex engineering challenges where performance, reliability, and security are essential. This is an opportunity to contribute to work that has genuine real-world impact in high-trust environments.


Role Overview:

  • Location: Cheltenham (Hybrid) – occasional travel to Hereford may be required
  • Package: Up-to £70,000 Basic + bonus + excellent benefits
  • Industry: Defence / National Security / Secure Digital Technology


What You’ll Be Doing:

  • Designing, building, and maintaining secure software solutions used in critical environments
  • Developing Android applications using Kotlin with modern UI approaches
  • Building backend services and APIs using Rust, Python, or Go
  • Working with Docker to containerise applications and support consistent deployments
  • Supporting CI/CD pipelines to improve automation and delivery speed
  • Writing clean, well-structured, and maintainable code across the stack
  • Collaborating closely with engineers, architects, and delivery teams
  • Taking part in code reviews and contributing to continuous improvement
  • Working within secure development environments and adapting to evolving requirements


Main Skills Needed:

  • Strong experience with Git and collaborative software development
  • Android development experience using Kotlin
  • Backend development exposure in Rust, Python, or Go
  • Understanding of software architecture principles (e.g. MVVM, UDF) and RESTful APIs
  • Experience with Docker and containerised environments
  • Knowledge of CI/CD pipelines and DevOps practices
  • Ability to work effectively in secure or restricted development environments
  • Strong problem-solving skills with a collaborative mindset
  • Comfortable working in fast-changing, prototype-driven environments


What’s in It for You:

  • Work on high-impact, secure technology used in critical national programmes
  • Hybrid working with flexibility and a modern engineering setup
  • Strong investment in your development and continuous learning
  • 25 days holiday plus bank holidays
  • Private medical cover and life assurance
  • Generous pension scheme (10% employer / 5% employee)
  • Bonus scheme and structured professional development support
  • Onsite facilities including parking, gym, café, and breakout spaces
  • A culture built around innovation, collaboration, and continuous improvement


We’ll keep this simple: if it sounds good, get in touch.


We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.


By applying you are confirming you are happy to be added to the Addition Solutions mailing list regarding future suitable positions. You can opt out of this at any time simply by contacting one of our consultants.

Key Skills

Ranked by relevance

python docker rust cicd android kotlin devops git ui
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Posted
Jun 16, 2026
Type
Full-time
Level
Mid-Senior
Location
Cheltenham
Company
Addition

Industries

Defense Space Manufacturing IT Services IT Consulting

Categories

Engineering

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