About the position:
Do you want to work for an International Service Delivery Center in Spain as a Lead Rust Engineer?

Join ERNI to build reliable, scalable software for lab solutions that make a real impact on patients. We’re looking for a hands-on Lead Rust Engineer to set the technical direction of a cross-functional team and drive high-quality delivery.

You lead by example, encourage open communication and create an environment where engineers can grow and deliver their best work.
- What you will bring
- Bachelor’s degree (or equivalent) in software/electrical engineering or a related field.
- Strong, hands-on Rust development experience (preferably more than 4 years) with deep understanding of core Rust concepts (ownership, borrowing, lifetimes) and asynchronous programming (async/await).
- Proficiency with Rust libraries/frameworks (Tokio, Actix-web, Rocket, Serde, SQL), and Foreign-Function Interfaces.
- Experience with Linux containers (Docker, Kubernetes) and basic scripting.
- Experience with message brokers (e.g. RabbitMQ), event-driven architecture, event stores,



event sourcing, and actor models.- Exposure to AI-enabled software development practices and modern cloud-native architectures.
- Familiar with Domain-Driven-Design (DDD), Test-Driven Development (TDD) and Behavior-Driven Development (BDD).
- English fluent.
- SAFe/Agile experience is essential.

Nice to have:
- Background in regulated domains (medical devices)
- React and automated UI testing experience
- German language skills
- ISAQB or similar architecture qualification

You will be responsible for
- Define and communicate the team’s technical vision and architecture.
- Convert business needs into scalable, secure solutions.
- Design, build and maintain Rust services and FFI integrations.
- Lead async/concurrent development (Tokio, Serde, Actix, etc.).
- Oversee deployments on Docker/Kubernetes.
- Promote code reviews, automated tests and CI/CD.- Design reliable messaging and event-driven

📌 Lead Rust Engineer (Barcelona)
🏢 Erni
📍 Barcelona