Experteer Overview As a Senior ML Platform Engineer at Preply, you will elevate Agentic AI from prototype to production, shaping durable runtime and secure tooling for stateful, AI-powered agents. You’ll collaborate across Engineering, Applied Science, Data, and Security to implement robust infrastructure, observability, and governance. You’ll influence platform design and tackle distributed, long-running workflows in a fast-growing AI-centric product. Join a mission to scale AI-enabled learning experiences globally and power reliable, impactful agent systems.Compensaciones / Incentivos
- Build a durable agent runtime with checkpoints, retries, timeouts, resumability, and deterministic recovery where possible
- Create a secure tool layer for discovery, registration, invocation and versioning across internal APIs and external services
- Own agent state, context and memory primitives with clear lifecycle, privacy, retention and retrieval semantics
- Design identity, scoped permissions and human controls for authorization, approvals, escalation and handoffs




- Develop guardrails for tool access, policy enforcement, argument validation, sandboxing and action limits
- Provide end-to-end observability, trace replay and scenario-based evaluation across plans, model calls, tool calls, state transitions and outcomes
- Ship SDKs, templates, local tools, documentation and paved-road patterns so teams can build agents without re-solving runtime infrastructure
- Evaluate frameworks, workflow engines, and tool protocols while operating the platform with clear SLOs, capacity and cost controls, incident response, and operational standardsResponsabilidades
- Proven track record (5+ years) designing, building, and operating backend services or ML infrastructure handling production traffic
- Strong Python skills and experience building developer-facing APIs/SDKs or shared libraries
- Experience building GenAI-powered or agentic systems using tool or function calling, structured outputs

📌 Senior Ml Platform Engineer (Barcelona)
🏢 Preply
📍 Barcelona