Senior Python Back-End Engineer with Gen AI experience

Lisbon - Portugal

Monthly Salary: EUR 3 - 5

Posted on: 01-11-2025

Vacancies: 1 Vacancy

Job Summary

Were 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 - its about engineering production-grade systems that harness existing AI models and frameworks to deliver real product value.

Youll 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 and trainings 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

Required Experience:

Senior IC

Were 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 - its about engineering production-grade systems that harness existing A...