Senior AI Backend Engineer - Siemens Mobility
Hiire · Lisbon, Portugal
About The Role
Hiire is supporting Siemens Mobility in the search for a Senior AI Software Engineer to join a team focused on building enterprise-grade AI solutions with direct impact on critical business operations and workflows.
This is an opportunity to work in a highly technical and multidisciplinary environment where AI, software engineering, and product thinking come together to create scalable solutions for real-world problems. We are looking for someone with a hands-on mindset, strong production focus, and experience turning AI prototypes into robust and reliable systems.
What You’ll Do
- Collaborate closely with engineering, operations, and business stakeholders to understand workflows, identify pain points, and design AI-driven solutions with measurable impact.
- Translate complex requirements into scalable AI-enabled services and technical concepts.
- Contribute directly to the design and architecture of systems powered by LLMs and retrieval technologies.
Build AI Systems for Production
- Develop and maintain scalable, production-grade AI services focused on:
- LLMs
- RAG pipelines
- Hybrid retrieval
- Semantic search
- Vector search
- Agentic workflows
- Build backend APIs, data pipelines, and integrations while ensuring reliability, observability, and engineering best practices.
- Own the full development lifecycle: architecture, implementation, testing, deployment, and monitoring.
AI Evaluation, Prompt Engineering & Data Quality
- Design rigorous evaluation strategies for AI output quality, retrieval accuracy, and model behavior.
- Treat prompt engineering as an engineering and experimentation discipline.
- Ensure high standards for data quality and contextual grounding across AI systems.
- Mentor junior team members on AI engineering, experimentation, and evaluation practices.
What We’re Looking For
- 5+ years of experience in Software Engineering, with strong exposure to AI, NLP, or Information Retrieval.
- Proven experience building and operating AI solutions in production and enterprise environments.
- Ability to bridge experimental Data Science workflows with reliable and maintainable software engineering practices.
Technical Skills
- Strong proficiency in modern Python (3.11+), including:
- async/await
- typing
- Pydantic
- Experience with:
- Docker
- CI/CD
- testing frameworks (pytest)
- code quality tooling (ruff, mypy)
- Git workflows and code reviews
- Hands-on experience with:
- LLMs
- Prompt Engineering
- RAG
- GraphRAG
- Vector databases / OpenSearch
- AI evaluation pipelines
Nice to Have
- Experience with AWS Bedrock or Azure OpenAI.
- Familiarity with MCP (Model Context Protocol) and modern AI interface standards.
If you’re looking for an opportunity to work on applied AI in a serious, scalable, and impactful environment, this could be a very exciting next step.
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