Full Stack Software Engineer

Zalion is an international AI start-up revolutionizing industrial procurement. We use cutting-edge AI agents to automate manual Source-to-Pay processes freeing up procurement teams for strategic work.

We are live with the largest companies in Europe & the US.

We love what we do. We get stuff done. We progress fast.

Tasks

• Own and ship end-to-end features from API design and data models to polished UIs and production monitoring.
• Build scalable backend APIs in Python/FastAPI
• Ship high-quality frontends using (React TypeScript) TanStack (Query/Router).
• Design and evolve agent workflows in LangChain/LangGraph that are robust observable and debuggable (not just prompt hacks)
• Work with both structured and unstructured procurement data (RFQs emails quotes contracts)
• Build data & system integrations (ERP email supplier systems)
• Help shape our architecture reliability and engineering best practices as we grow
• Collaborate directly with founders PM and customers to understand real procurement workflows and turn them into product.

Requirements

• Strong Python skills - clean maintainable well-tested code matters
• Professional experience with React/ and TypeScript
• Experience in data engineering and backend architecture
• Comfortable building and scaling RESTful APIs
• Curiosity about how LLMs can be used in real-world settings
• A builder mindset - you like to ship measure and iterate rather than bikeshed
• Comfort with ambiguity and ownership: you spot problems propose solutions and drive them to completion without waiting for perfect specs
• 4 years experience in relevant (Start-Up) roles

Benefits

• Build AI agents that actually do things
• Massive autonomy zero bureaucracy
• Immediate impact your work ships fast to real customers
• Modern stack no legacy
• Competitive salary meaningful equity
• High-end equipment

Tech Stack Youll Work With

• Python (FastAPI LangChain LangGraph LangSmith)
• React TypeScript TanStack Query/Router
• AWS (Bedrock ECS Fargate Lambda SQS/SNS)
• GitHub CI/CD Sentry & Grafana & Prometheus
• Postgres Redis
• Large Language Models (LLMs) and evaluation tooling

Key Skills
Spring,.NET,C/C++,Go,React,OOP,C#,Data Structures,JavaScript,Software Development,Java,Distributed Systems
Employment Type : Employee
Experience: years
Vacancy: 1