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Senior Rust Engineer

Hybrid in València & Madrid·Added 6 months ago (last checked 7 Oct)

ERNI Spain

16 open roles

Overview

Work mode
Hybrid, València & Madrid
English
Required
Other languages
German, Catalan
Experience
2+ years
Education
University degree
Benefits
Private health insurance, flexible pay plan, gym access

Visa options

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Skills

Requirements

What we're looking for

  • Bachelor's degree in Software/Electrical Engineering or a related field.

  • Strong hands‑on Rust development experience (ideally 2+ years) with deep knowledge of ownership, borrowing, lifetimes and async/await.

  • Practical experience with Rust web/async libraries and ecosystem (e.g., Tokio, Actix‑web, Rocket, Serde, SQL libraries).

  • Experience designing and implementing event‑driven, distributed systems.

  • Familiarity with design patterns for distributed systems and resilient architectures.

  • Experience with Linux containers and orchestration (Docker, Kubernetes) and basic scripting.

  • Experience with automated testing and integration testing between backend and frontend.

  • Working knowledge of DDD, TDD and BDD practices.

  • Experience working in Agile environments (Scrum, Kanban, or similar).

  • English fluency.

Nice to have

  • Prior involvement in regulated environments (e.g., medical devices) and familiarity with quality/regulatory standards.

  • Proficiency with React and automated UI testing.

  • Exposure to AI‑enabled development practices and modern cloud‑native architectures.

  • German language skills.

  • ISAQB Foundation or relevant advanced modules (or equivalent).

Pay & benefits

What you'll get

🎓 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! 💬

The role

🌍Do you want to work for an International Service Delivery Center in Spain as a Senior Rust Engineer?🦀

You will be part of a cross-functional agile team building a next-generation data management platform within a highly regulated environment. The system is designed using a distributed, event-driven microservices architecture, handling complex workflows, real-time data processing, and integrations with external systems.

The platform emphasizes scalability, resilience, traceability, and high reliability, leveraging modern technologies such as Rust, container orchestration, and event sourcing patterns. The team operates within an agile framework, focusing on continuous delivery, built-in quality, and strong engineering practices.

What you'll do

  • Design, develop and maintain robust Rust backend components, applying pragmatic problem‑solving and deep technical knowledge.

  • Implement asynchronous Rust solutions and integrate them into event‑driven architectures.

  • Contribute to architecture and design reviews; define and document unit specifications, interfaces and quality attributes.

  • Build and maintain integrations with LIS/LIMS, lab instruments and other lab IT systems; handle data persistence, auditing and accessibility requirements.

  • Ensure timely delivery of high‑quality software that meets regulatory and QMS requirements.

  • Implement and maintain automated testing and ensure traceability to requirements.

  • Maintain documentation and regulatory artifacts required for audits and compliance.

  • Drive continuous improvement of code quality, reliability and performance; mentor peers and promote ownership across the team.

  • Communicate complex technical concepts clearly to tech leads, product owners and cross‑functional teams to foster collaboration and learning.

  • Participate in Agile ceremonies and coordinate with other teams for aligned delivery.

  • Follow security‑ and privacy‑aware development practices and adhere to relevant standards and company policies.

How you'll work

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!

How do we make this happen?


What you will bring 🤝

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.

About ERNI Spain

ERNI is a Swiss-based software engineering and consulting company that helps organizations build and modernize digital products. With a strong focus on industries such as pharmaceuticals, healthcare, automotive, and manufacturing, ERNI provides end-to-end services from software development and data engineering to quality assurance and agile delivery. The company operates across Europe, the US, and Asia, employing over 1,000 professionals worldwide.

In Spain, ERNI has a significant presence with offices in Barcelona and Madrid, serving as a key delivery hub for international clients, particularly in the pharma and healthcare sectors. The company is known for its collaborative, engineering-driven culture and offers opportunities for international professionals to work on complex, regulated projects. ERNI supports relocation and values diverse, cross-cultural teams, making it an attractive option for engineers and tech specialists looking to build a career in Spain.

Industry
Software Engineering
Founded
1994
Employees
1,000–5,000
Headquarters
Zurich, Switzerland
In Spain
Barcelona, Madrid

Good to know if you are moving

  • ERNI has offices in Barcelona and Madrid, offering opportunities to work in Spain's vibrant tech hubs.
  • The company focuses heavily on the pharma and healthcare sectors, providing exposure to cutting-edge projects in data engineering, AI, and clinical trials.
  • ERNI supports relocation for international hires, with a multicultural work environment and English as a common working language.
  • The company offers a clear career path for engineers, including roles in Rust, Python, .NET, and data engineering.
  • ERNI's Spanish offices are part of a global network, allowing collaboration with teams across Europe, the US, and Asia.

In their own words

About the company & team

At ERNI, you are never just a number. Even if you work on an external project, you will feel part of the team and always supported.

With people. Besides your team and manager, you will have several support figures like a godparent, who will help you with the practical and administrative aspects of daily life during your first 6 months.

And the second most important person after you, your mentor, who will guide you through your entire onboarding and career at ERNI. You will have regular 1:1 meetings with them, and recurrently, you will work on your development plan to define your short-, medium-, and long-term goals.

At ERNI, we highly value experience and technical knowledge. As a senior profile, you will have the space to continue growing, whether by deepening your technical skills or having greater influence on project decisions, with autonomy and the opportunity to share knowledge with other experts.

And if you are interested in mentoring, there is also space for that: supporting other ERNIans while still focusing on the technical excellence that sets us apart.

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