Overview

In this role you design, build, and operate backend microservices powering AI-enabled loyalty, health, and personalization features for pharmacy retail apps. You will connect data, business logic, and AI capabilities to deliver reliable user experiences at scale, leveraging AI coding agents. You’ll embed model lifecycle, safety layers, and CI/CD practices to keep systems robust and compliant. You collaborate with product and AI teams to translate model behavior into solid backend improvements. This is a chance to shape AI-driven backend platforms at scale within a fast-moving team.

Compensaciones / Beneficios

- Great team
- Competitive Salary
- Restaurant Ticket for 170/month
- Private Health insurance
- Hybrid remote-office workplace
- Adaptable schedule

Responsabilidades

- Guide model behavior through feedback loops and evaluation mechanisms
- Build and maintain pipelines for fine-tuning and retraining (SFT, LoRA, DPO) with safe feedback
- Develop evaluation tools and safety layers (guardrails, moderation, scoring) for accuracy and compliance
- Integrate model lifecycle management into CI/CD workflows including versioning, deployment, rollback, and monitoring




- Collaborate with data and platform engineers to enable scalable model serving and observability in Kubernetes
- Translate insights from model behavior into systemic backend improvements

Requisitos principales

- 5+ years of backend engineering experience (.NET Core / C#, Go, or Java)
- Proven experience building and operating cloud-native microservices (Kubernetes, Docker, Terraform, ArgoCD)
- Strong understanding of API design, service contracts, and observability (OpenTelemetry, Prometheus)
- Experience integrating or operating LLM-based APIs (OpenAI, Azure OpenAI, Anthropic) in production
- Solid grasp of CI/CD pipelines, automated testing, and deployment practices
- Familiarity with data flows and storage (SQL/NoSQL, queues, message buses)
- Clear communicator able to reason about model behavior and system design with technical and product stakeholders

- Clear communicator
- Collaborative mindset
- Strategic thinking
- Backend engineering with .NET Core/C#, Go, or Java
- Kubernetes and Docker
- Terraform and ArgoCD

📌 AI Backend Engineer (Barcelona)
🏢 Melza Consulting
📍 Barcelona