Full Stack AI Engineer

Job description

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 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. Requirements 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. 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 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