Lead Rust Engineer

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.

The ideal candidate is an experienced Rust software engineer with a proven track record of leading technical initiatives in complex software environments. You enjoy solving challenging technical problems while empowering others to perform at their best.

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.

Experience with applying design patterns relevant for distributed systems.

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.

Apply DDD, TDD/BDD and best practices for distributed systems.

Design reliable messaging and event-driven patterns.

Mentor engineers and remove technical blockers.

Foster a collaborative, inclusive team culture.

Support planning, estimation and prioritization.

Work with Product, QA, DevOps and Architects.

Coordinate technical dependencies across teams.

Communicate technical concepts clearly in Agile/SAFe ceremonies.

What if the project ends?

We work on a wide variety of projects, technologies, and sectors, allowing you to keep growing in different environments. If a project ends or you feel ready for a new challenge, we’ll find another one that aligns with your professional development.

Our working model ‍

We ask you to be available for key meetings. Need to leave for a doctor’s appointment or to pick up your child from school? No problem. We trust you to deliver quality work within your 40-hour workweek.

Our model is hybrid: we usually go to the office 2 days a week, but we love seeing each other’s faces; the best stories always happen in the office!

You will also enjoy:

We cover your certifications and reward technical achievements up to €1,400.

Private health and travel insurance.

Full coverage for sick leave + 1 extra day off per month without medical leave.

️ Free emotional, legal, and family support.

️‍ ️ Gym discounts + sports compensation.

Flexible remuneration: meals, transport, childcare, etc.

Referral bonuses: up to €6,000 per candidate and €5,000 per client.

23 working days of vacation.

️ Free language courses: English, Spanish, Catalan and German.

And the salary?

We will discuss it during the first call. If it is important to you, feel free to ask!