Junior Software Engineer (Multi-stack)
Jonas Software • UK (Remote)
February 16, 2026About the Role
Jonas Software is hiring a Junior Software Engineer to accelerate the delivery of pilots and reusable kits by building, testing, and refining AI-enabled components. Jonas Software is a leading provider of enterprise management software solutions serving a wide range of vertical markets. The company supports over 60,000 customers in more than 30 countries and employs over 6,000 professionals.
Responsibilities
- Build features and components for central AI starter kits: agent and workflow components, RAG pipelines, data connectors, and lightweight UI where needed.
- Build evaluation harnesses and metrics dashboards (quality, latency, cost).
- Implement strong engineering hygiene: tests, linting, code review participation, CI/CD contributions.
- Write clear documentation and runbooks for what you build.
- Help adapt central patterns to business unit contexts under supervision.
- Contribute to show-and-tell demos and case study write-ups.
- Work spec-first, keep changes small, and prove behaviour with tests and evals.
Requirements
- Solid coding ability in at least one of: Python, TypeScript/JavaScript, C#, or Java (plus willingness to learn what's needed).
- Basic engineering workflow competence: Git, pull requests, debugging, writing tests.
- Comfort working with APIs and data (JSON, authentication basics, querying/storing data).
- Evidence of learning speed and curiosity (projects, internships, OSS, coursework, hackathons).
- Ability to communicate clearly in writing (important for spec-first delivery and handovers).
- Any practical LLM app exposure: prompt/RAG basics, vector search concepts, tool-using agents.
- Familiarity with Azure or AWS basics.
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