DevOps / Infrastructure Engineer - Internship

As a DevOps / Infrastructure Engineer intern at Bitstack, you will build a local test environment that enables every backend engineer to test changes end to end, quickly and independently. You join the Infrastructure team at a crypto-native bank with 300K+ users, backed by YC and leading VCs, and work on a project that will shape how the entire engineering team develops and tests code on Google Cloud.

What you'll do

• Learn Bitstack's stack (Go and Python services, Bazel, Docker, Kubernetes, GCP) and map how services depend on each other
• Evaluate existing test tooling, emulators, and market solutions, then recommend an approach with a documented decision log of trade-offs
• Build a pilot cluster of interconnected services that runs locally with a single command
• Solve real problems as they emerge: configuration and secrets management, service-to-service authentication, cloud dependencies (Pub/Sub, Cloud Tasks, databases, caches), and async workers
• Extend coverage cluster by cluster until every backend service is included
• Create seed data and scripts so any user state, limit, or time-based event can be reproduced and reset on demand
• Work directly with backend engineers and QA as your first users, gather feedback, and iterate
• Write documentation clear enough for new engineers to self-serve, and support the team through adoption
• Turn your decision log into a recommendation report and hand over a maintainable tool to the team

What you bring

• Currently in the final year of an engineering school or Master's degree (Bac+5) in Computer Science or related field, looking for a 6-month end-of-studies internship starting in early 2027
• Hands-on experience with Docker and working knowledge of Kubernetes
• Comfortable with Linux and scripting in shell, Python, or similar
• Previous experience with a cloud provider through an internship, project, or coursework
• Ability to explain technical trade-offs clearly in writing and to the engineers using your work
• Curious and autonomous, with a drive to understand how systems fit together before changing them
• Fluent in English
• Based in Paris or willing to relocate for the internship (exceptional candidates elsewhere in France who prefer remote work are welcome to apply)

Nice to have

• Experience with GCP
• Experience with Go, Bazel, or Docker Compose
• Fluency in French

What we offer

• 3 days in the office in Paris (Bourse) and 2 days working remotely
• Swile meal vouchers
• Mentoring from a DevOps engineer throughout the internship
• Hands-on experience with a production-grade microservices architecture on Google Cloud

About Bitstack

Bitstack is a crypto-native bank serving 300K+ users, starting with an idea in 2021 to democratize Bitcoin in France and evolving into a fintech platform bringing a better way to save, spend, and grow money. Backed by Y Combinator and leading VCs including 13books Capital, Stillmark, and Serena, Bitstack is rebuilding finance from the ground up to empower people to achieve financial freedom through a more open and inclusive financial system.