Backend Software Engineer (Java/C++) | SC Cleared

Oscar Associates Limited; Cheltenham; On-site; GBP 68,000 - 83,000; Full time

Job summary

Oscar Associates Limited is seeking a Software Developer to join a high-performance backend team delivering secure systems for government and defence environments. The role focuses on Java and C++ in Linux, building scalable APIs and distributed services.

You will collaborate across design, architecture and engineering practices, contribute to secure software solutions, and work with cutting-edge technologies including Docker, Git and CI/CD in a demanding security context.

Qualifications

• Commercial experience developing with Java and/or C++.
• Strong experience in Linux environments.
• Experience building backend applications, APIs and distributed systems.
• Understanding of software architecture, design patterns and OOP.
• Experience with multithreading, debugging and performance optimisation.
• Exposure to Docker, CI/CD, DevSecOps and Git workflows.
• Experience working with relational and/or NoSQL databases.

Responsibilities

• Design, develop and maintain scalable software systems using Java and C++ within Linux environments.
• Work across technical design, architecture and engineering best practices.
• Develop backend services, APIs and distributed applications.
• Help deliver secure, reliable and maintainable software solutions.
• Contribute to technical decisions.
• Collaborate with engineering teams.
• Support the continuous improvement of development practices.

Skills

Java

C++

Linux

Backend architecture

Multithreading

CI/CD

DevSecOps

Git workflows

APIs / distributed systems

Databases (NoSQL/relational)

Tools

Docker

Git

CI/CD

NoSQL

Relational databases

Job description

Oscar Associates Limited is seeking a Software Developer to join a high-performance backend team delivering secure systems for government and defence environments. The role focuses on Java and C++ in Linux, building scalable APIs and distributed services.

You will collaborate across design, architecture and engineering practices, contribute to secure software solutions, and work with cutting-edge technologies including Docker, Git and CI/CD in a demanding security context.