GenAI Platform Engineer - Scalable AI Gateways

Preply; Barcelona; On-site; EUR 100,000 - 140,000; Full time

Benefits offered by this job

Relocation package to Barcelona Hub

Health insurance

Gympass access

Learning & Development budget

Time off for self-development

Equity

Job summary

Preply is powering learners worldwide and seeks a senior Backend/GenAI engineer to architect scalable ML infrastructure in Barcelona. You will design unified gateways, build python APIs, and work across model vendors, with a strong emphasis on reliability, performance, and security.

You will own production systems, implement observability, cost controls, and CI/CD for GenAI workflows, collaborating with security teams and on-call rotations.

Qualifications

• 5+ years designing, building and operating production backend or ML infra.
• Strong Python and API/SDK development experience.
• Hands-on GenAI experience with vector retrieval and external APIs.

Responsibilities

• Architect unified gateway with automated routing and resilient fallbacks.
• Improve system efficiency via dynamic traffic management and caching.
• Establish evaluation mechanisms for precision, stability, and safety.
• Deliver observability with tracing, telemetry, cost analytics, monitoring.
• Standardize prompt engineering with versioning, testing, and CI/CD.
• Collaborate with security/privacy to enforce policies and safe defaults.

Skills

Backend systems

Python

GenAI systems

Distributed tracing

Cloud (AWS)

Observability

APIs/SDKs

On-call rotation

English (C1)

Tools

Metaflow

Databricks

AWS SageMaker

Vector databases

GPU optimization

Job description

Preply is powering learners worldwide and seeks a senior Backend/GenAI engineer to architect scalable ML infrastructure in Barcelona. You will design unified gateways, build python APIs, and work across model vendors, with a strong emphasis on reliability, performance, and security.

You will own production systems, implement observability, cost controls, and CI/CD for GenAI workflows, collaborating with security teams and on-call rotations.