Full Stack AI 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.

• Own and ship agent-powered features end-to-end – from idea and prototype to production rollout and iteration.


• Design, build, and deploy AI agents in production that interact with real systems (ERPs, email, supplier portals) and deliver measurable outcomes.


• Work with both structured and unstructured data (RFQs, emails, quotes, contracts) to power memory, retrieval, and decision-making.


• Build scalable memory, reasoning, and orchestration pipelines using tools like LangChain/LangGraph and evaluation frameworks.


• Integrate with external APIs and legacy systems, dealing with real-world messiness, rate limits, and failure modes.


• Contribute to our cloud infrastructure for scalable agentic workloads (observability, CI/CD, reliability, cost-awareness).


• Solve hard problems around context management, latency, robustness, and guardrails – making agents debuggable and trustworthy, not magic.

• Strong Python skills and a track record of writing clean, maintainable, well-tested backend code


• Solid experience designing and building RESTful APIs and data models in production environments


• Experience with data engineering concepts (ETL, data quality, performance) and backend architecture


• Hands-on experience building something real with LLMs (OpenAI, Claude, etc.) – side projects are fine as long as they’re concrete


• Comfort working in the cloud (ideally AWS) with CI/CD, logging, and monitoring


• A builder mindset – you like to ship small, iterate quickly, and own your work end-to-end


• Comfort with ambiguity and ownership: you spot problems, propose solutions, and drive them to completion without waiting for perfect specs


• Roughly 4+ years of professional experience, including at least one role where you owned a production service, subsystem, or major feature.

• 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 You’ll Work With

• Python (LangChain, LangGraph, LangSmith, FastAPI)


• AWS (Bedrock, ECS Fargate, Lambda, S3, SQS/SNS)


• Next.js, React, TanStack Query/Router


• GitHub CI/CD , Sentry & Grafana & Prometheus


• Postgres, Redis


• Large Language Models (LLMs) and AI infrastructure (evaluation, tracing, guardrails)


• Whatever the future brings that helps us ship faster and better