
Senior AI Backend Engineer - Siemens Mobility
Hiire · Lisbon, Portugal · Hybrid
Weak hiring record · median 86 days open
All reasons
In its favour
- Posted today
- Still listed on the employer's own board
Hiire is supporting **Siemens Mobility i** n the search for a Senior Backend 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 Backend Development.
- Strong proficiency in modern Python (3.
11+), including
async/await, typing, Pydantic.
- Ability to bridge experimental Data Science workflows with reliable and maintainable software engineering practices.
Experience with
Docker, CI/CD, testing frameworks (pytest), code quality tooling (ruff, mypy), Git workflows and code reviews
### Nice to Have
- Experience building and operating AI solutions in production and enterprise environments.
- Exposure to AI, NLP, or Information Retrieval.
Hands-on experience with
LLMs, Prompt Engineering, RAG, GraphRAG, Vector databases / OpenSearch, AI evaluation pipelines
- 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.
Skills
- LLM
- Azure AI Services
- Retrieval-Augmented Generation
- Prompt Engineering
- Python
- Pydantic
- Docker
- pytest
- Git
- NLP
- Vector Databases
- OpenSearch
- Bedrock
- Azure OpenAI
- Model Context Protocol
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