Senior Python Back-End Engineer with Gen AI experience

N-iX; Madrid; Presencial; EUR 45.000 - 65.000; Jornada completa

Descripción de la vacante

A leading technology company in Madrid is seeking a backend-focused software engineer to help integrate AI-driven features into its products. The ideal candidate will have 3-5 years of experience with Python, TypeScript, and AI APIs. Responsibilities include designing backend services and collaborating with cross-functional teams. This position offers flexibility in working format and a competitive salary.

Servicios

Flexible working format

Competitive salary

Personalized career growth

Professional development tools

Education reimbursement

Corporate events

Formación

• 3 - 5 years of experience as a backend or platform engineer.
• Strong skills in Python, TypeScript or similar backend stack.
• Hands-on experience with AI / LLM APIs, RAG frameworks or vector stores.
• Understanding of prompt engineering, agent design or AI system patterns.
• Comfort working with non-deterministic systems and building safeguards.
• Strong software engineering fundamentals: clean architecture, testing, CI/CD.

Responsabilidades

• Design and implement backend services that integrate LLM APIs.
• Build and maintain prompt orchestration logic and agent frameworks.
• Work with vector databases to enable semantic search and retrieval.
• Collaborate with product and validation teams for reliable outputs.
• Implement monitoring and fallbacks for AI-driven services in production.
• Contribute to internal SDKs and documentation for product teams.

Conocimientos

Python

TypeScript

APIs

Docker

REST

AWS

NoSQL

MySQL

JavaScript

Postgresql

Django

GIT

Descripción del empleo

We’re looking for a backend-focused software engineer with a strong interest in applied AI to help us integrate LLMs RAG pipelines and agentic workflows into our SaaS products. This role is not about building models from scratch - it’s about engineering production‑grade systems that harness existing AI models and frameworks to deliver real product value.

You’ll collaborate with product managers, LLM specialists and domain experts to design, build and scale intelligent features powered by modern AI technologies.

Responsibilities

• Design and implement backend services that integrate LLM APIs (e.g. OpenAI, Claude) and retrieval‑augmented generation (RAG) architectures
• Build and maintain prompt orchestration logic, agent frameworks and tool integrations
• Work with vector databases (e.g. Pinecone, Weaviate, pgvector) to enable semantic search and retrieval
• Collaborate with product and validation teams to ensure outputs are reliable, safe and aligned with domain expectations
• Implement monitoring, observability and fallbacks for AI‑driven services in production
• Contribute to internal SDKs, templates and documentation for reusability across product teams

Requirements

• 3 - 5 years of experience as a backend or platform engineer
• Strong skills in Python, TypeScript or similar backend stack
• Hands‑on experience with AI / LLM APIs, RAG frameworks (LangChain, LlamaIndex) or vector stores
• Understanding of prompt engineering, agent design or AI system patterns
• Comfort working with non‑deterministic systems and building safeguards around them
• Strong software engineering fundamentals: clean architecture, testing, CI/CD, logging

Nice to Have

• Experience with agentic AI tools (LangGraph, CrewAI, etc.)
• Familiarity with LLM evaluation techniques or AI observability platforms
• Exposure to regulated environments (e.g. clinical, financial, legal tech)

We Offer

• Flexible working format - remote office‑based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks, training centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location‑specific benefits
• Not applicable for freelancers

Key Skills

APIs,Docker,Jenkins,REST,Python,AWS,NoSQL,MySQL,JavaScript,Postgresql,Django,GIT