Our client, a leading technology company in the Defence & Security sector, is currently seeking a talented Software Engineer to join their innovative team on a permanent basis. This role is based at Portsdown Technology Park in Portsmouth and offers the exciting opportunity to work on cutting-edge immersive training solutions and simulations.
Key Responsibilities:
- Build and maintain prototypes, proof-of-concept systems, and technical demonstrators
- Take early-stage feasibility prototypes forward into working implementations, validating technical assumptions and documenting findings
- Implement integrations between AI services, APIs, backend systems, XR applications, simulation environments, and third-party platforms
- Develop microservices, wrappers, connectors, and service interfaces to support solution components
- Support applied AI development including LLM services, speech services, classification models, RAG pipelines, and AI-enabled application features
- Prepare and maintain demo-ready technical builds for internal and customer-facing demonstrations
- Support the preparation of technical handoff to delivery teams, including setup guides, implementation notes, configuration instructions, and known-issue logs
- Test and validate solution components against defined requirements or acceptance criteria, recording issues, limitations, and dependencies clearly
Job Requirements:
- Degree in software engineering, computer science, AI, games technology, simulation or a related technical discipline
- Practical software development experience in Python, C++, or C#
- Ability to build, test, and debug software, integrations, and small services independently
- Understanding of APIs, data formats, and basic system integration concepts
- Willingness to work across different technical areas including AI, XR, backend services, tooling, and prototyping
- Strong problem-solving ability and enthusiasm for learning in a fast-paced R&D environment
- Excellent communication skills to articulate technical issues and blockers clearly
Desirable Skills:
- Experience with AI/ML tools, LLMs, speech services, RAG systems, or AI APIs
- Experience with Unreal Engine, Unity, or other real-time 3D development environments
- Familiarity with Docker, FastAPI, REST APIs, Git, and deployment workflows
- Experience with simulation, defence, XR, training systems, or serious games
- Familiarity with cloud services or local/offline model deployment
- Experience preparing demos, prototypes, or proof-of-concept systems for technical or customer audiences
Benefits:
- Competitive salary
- Family medical and dental cover
- 25 days annual leave, birthday day off + bank holidays
- Additional 5 days annual leave after 1 year of employment
- 5 additional reservist volunteering days on full pay
- 2 volunteering days on full pay
- Pension NEST 7%
- Cycle to work scheme
- EV scheme
- Career development opportunities and progression pathways
- Employee assistance package
- Flexible working
- Company annual socials and wellbeing initiatives
If you are an experienced Software Engineer eager to contribute to transformative digital immersive training solutions within the Defence & Security sector, we would love to hear from you. Apply now to join our client's dynamic and supportive team in Portsmouth.
