We’re looking for a Full Stack Engineer who wants real ownership in a fast‑growing, profitable health tech company. You will ship end‑to‑end features, shape the product, and grow with the team.

Key Responsibilities

1. Develop and maintain scalable backend systems and APIs using Node.js and Adonis.
2. Manage databases (MySQL) and ensure data integrity and performance optimisation.
3. Deploy and monitor services using PM2 and Docker on AWS.
4. Deliver new features and improve existing ones.
5. Integrating Advanced AI Capabilities: Explore, evaluate and integrate LLM APIs and leverage agent frameworks to power up features in our products.
6. Ensure code quality, security, and best practices across all backend services. Design and create systems that always put user data security and privacy first, ensuring sensitive information is well-protected.
7. Product mindset with ability to understand metrics and user journeys.
8. Engineering Excellence: Contribute through Agile practices, clear documentation, thorough testing, and continuous integration.

What we look for

1. A candidate based in sunny Barcelona.
2. Self-motivated with a hunger to make a real impact and grow with the company.
3. Bachelor’s degree in Computer Science or related field.
4. At least 4 years of backend engineering experience, ideally within a scaleup environment.
5. Proficiency in Node.js and Adonis, MySQL, Docker, AWS, and PM2. Python experience is a plus.
6. Strong problem-solving skills and a passion for building high-quality software.
7. Product mindset to understand what we do and why.
8. Fluent in English as we are an international team. Spanish is a plus.
9. A positive and solution-oriented mindset, unafraid to experiment and take initiative.
10. Doesn’t take NO as an answer. Curious and determined to make an impact.
11. Team player able to communicate with a senior backend developer and CEO.

What We Offer

1. Competitive salary and benefits involving health and education.
2. Equity (share options) in the company with a vesting plan.
3. Hybrid working environment (3-4 days in our Barcelona office, 1-2 days remote). Office with a gym in central Barcelona.
4. Career growth and learning opportunities with 1:1 coaching from impressive exited founders and individuals advising SANNO in multiple fronts: software engineering, AI engineers and product.
5. Opportunity to make an impact and work in a fast-paced company with a talented, mission-driven team.

The process is structured under 3 phases:

1. Screening interview with our founder (online)
2. Tech interview (online)
3. Final interview with motivational and tech checks (in-person)

After reference checks are passed successfully, we will make an offer!