Junior Backend Software Engineer

Join Navan’s Expense Engineering team to own the end-to-end expense lifecycle for employees, admins, and finance. You’ll ship features that connect receipts, spend, and accounting across international rules and multi-entity setups. You’ll work on AI-enhanced receipt extraction, conversational expense, and admin/finance agents within a data-rich, compliant platform. This role blends backend services with AI components to improve accuracy, latency, and safety at scale. You’ll collaborate with cross-functional teams to deliver impactful, enterprise-grade finance solutions.

• Design and ship features in backend (Java/Spring Boot) and web (TypeScript) with AI services as appropriate
• Own APIs and event-driven flows handling money, receipts, and policy decisions at scale
• Build or extend LLM-backed agents for tool use, grounding, streaming, memory, retrieval, and evals
• Improve document extraction and auto-itemization for tax fields, latency, and cost
• Instrument production with observability, dashboards, and quality metrics
• Partner with Product and Design on expense surfaces, including unified chat
• Ensure correctness in financial systems (idempotency, auditability, permissions)
• Mentor teammates and document designs for cross-time-zone implementation

• 1–3 years of software engineering experience
• Strong CS fundamentals and backend experience in Java/Spring Boot, TypeScript/Node.js or Python
• Experience with APIs, relational databases, and cloud platforms
• Kafka or similar messaging systems a plus
• Exposure to AI tools, LLMs, chatbots, or document processing
• Interest in financial/workflow-heavy products (payments, expenses, tax)
• Good communication, willingness to learn, and production-quality engineering
• Based in Berlin or London, or willing to relocate

• Good communication
• Willingness to learn
• Understanding of testing and debugging
• Java/Spring Boot
• TypeScript/Node.js
• Python