Platform Engineer – AI & Cloud

Lenstra was created by the passion of engineers specialised in Computer Science with a proven history in delivering top quality solutions to its customers. Bringing together work excellence and vision we managed to serve top tier clients from a variety of industry domains like Banking/Insurance, Luxury and Tech.

We help our clients solve their most difficult problems around Cloud Computing & DevOps, Data Platforms, AI Agentic Systems, and IT Security by taking a holistic approach to their environment and building complex but always relevant solutions to accelerate their business.

Our engineering team is committed to great ethics, and most of our teammates are core contributors to OpenSource projects such as CPython, Postgres, or Terraform.

About the role

We are currently seeking a talented Cloud & AI Platform Engineer to join our team. The successful candidate will:

• Participate in building a Data Science and AI Agentics platform (VM provisioning, dataset access, Feature Store, Model Registry, agent orchestration, tool/plugin integration, inference infrastructure).
• Design and operate the infrastructure underpinning AI agent workflows — including compute scaling for LLM inference, vector store provisioning, and secure tool-calling pipelines.
• Be accountable for infrastructure management, monitoring practices, and disaster recovery exercises.
• Provide technical expertise and guidance on AWS throughout the entire project lifecycle.
• Analyse and optimise cloud infrastructure to improve performance, security, and cost-efficiency — including cost governance for compute-intensive AI workloads.
• Provide technical support and troubleshooting for cloud and AI-platform-related issues.
• Develop and maintain documentation for cloud infrastructure, AI platform components, processes, and best practices.
• Stay up-to-date with the latest trends in cloud technologies and agentic AI infrastructure, and share knowledge with the team.

Location: Paris based, 3 days onsite, 2 days remote

Contract type: full time, permanent

You may be a good addition to our team if

• You are committed to precision.
• You have strong problem-solving and analytical skills, with a focus on customer success.
• You have very good written and oral communication skills in English and French.
• You are fluent in Python.
• You are comfortable with infrastructure-as-code.
• You are curious about or already exposed to AI agent frameworks and LLM-based systems.
• You are able to remain humble during a code review and you're not afraid to start over and learn.
• You have a good general knowledge of Computer Science.
• You are familiar with Cloud Computing and have good knowledge of one of the big providers (AWS or GCP).

Good to have

• A Master's degree in Computer Science, Engineering, or a related field.
• Strong knowledge of cloud services, architectures, and best practices.
• Hands‑on experience with infrastructure-as-code tools, especially Terraform.
• Experience with containerisation and orchestration technologies, such as Docker and Kubernetes.
• Exposure to agent frameworks (LangGraph, CrewAI, AutoGen, Bedrock Agents, or similar) or LLM orchestration tools.
• Familiarity with vector databases (Pinecone, pgvector, OpenSearch) and RAG pipelines.
• Familiarity with DevOps principles and CI/CD pipelines.
• Ability to work both independently and as part of a team.

What we offer

• Salary from 48k to 70k — based on seniority and interview performance, no surprises
• Meal vouchers — 50% covered by Lenstra
• Paris — 3 days onsite / 2 remote

We're happy to answer questions before you apply.