Описание: We power people's progress. At Preply, we're all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled
- and it's creating real impact. We've just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Задачи:
* Architect unified gateway with automated routing, quota controls, and resilient fallback systems across model vendors.
* Drive system efficiency and low latency via dynamic traffic management, response caching, token budgeting, and cost allocation controls.
* Establish robust evaluation mechanisms to guarantee high precision, stability, and safety in model outputs.
* Deliver system observability, providing deep tracing, performance telemetry, cost analytics, continuous monitoring, and alerting across GenAI lifecycles.
* Standardize prompt engineering workflows with automated versioning, automated testing, governance, and CI/CD integrations for production delivery.
* Embed platform guardrails alongside Security and Privacy experts to enforce policies, and safe production defaults automatically.
* Maintain sustainable incident response, blameless postmortems, and comprehensive monitoring for GenAI stacks. Требования:
* 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 Practical experience with GenAI systems, including vector retrieval, external provider APIs, and common issues.
* AI Expertise: You're a forefront user of Agentic AI.



You're able to bring hands-on experience and start influencing the team beyond code generation; reserving judgment for architecture, business logic, and security, using AI as a thought partner and being able to set up quality gates and safety nets to enhance existing engineering workflows and propose AI-native alternatives.
* Sound knowledge of distributed systems, including high availability, concurrency, caching and rate limiting.
* Experience with at least one major public cloud, its services and infrastructure (preferably AWS).
* Hands-on experience with distributed tracing, system telemetry, SLOs, and incident triage.
* Strong communication skills and at least C1 English level, plus willingness to join a paid on-call rotation.
* Будет плюсом: Experience operating AI gateways or scalable model serving infrastructure;
* Будет плюсом: Familiarity with evaluation suites, prompt management, vector databases, or customized GenAI observability tooling;
* Будет плюсом: Experience with Metaflow, Databricks, or AWS SageMaker;
* Будет плюсом: Knowledge of hosting open-source foundation models, optimizing GPU compute, dynamic scaling, and infrastructure cost controls;
* Будет плюсом: Familiarity with agentic workflows, multi-agent frameworks and tool-use patterns Условия:
* An open, collaborative, dynamic, and diverse culture;
* A generous monthly allowance for lessons on Preply.com, Learning & Development budget, and time off for your self-development;
* A competitive financial package with equity, leave allowance and health insurance;
* Not in Barcelona?

We offer
an attractive relocation package to join us in our Preply Barcelona Hub Access to free mental health support platforms;
* Access to Gympass-partnered wellness and gym centers throughout Spain to promote and support well-being and physical health;
* The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting). #J-18808-Ljbffr

📌 ML platform engineer in GenAI (España)
🏢 Preply
📍 España