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Senior Backend Engineer (x/f/m)

Posted 19 Jun 2025
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Work experience
8 to 20 years
Full-time / part-time
Full-time
Job function
Degree level
Required language
English (Fluent)

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Join Doctolib Siilo as a Senior Backend Engineer

About Doctolib Siilo:

Siilo is a secure medical communication app designed for healthcare professionals. More than 600,000 healthcare professionals use Doctolib Siilo to discuss and coordinate patient care with colleagues both within and beyond their organisational walls. Today, Doctolib Siilo is the largest medical network in Europe.

Doctolib is a purpose-led company that strives for a healthier world with more than 2,800 employees across France, Italy, Germany, and the Netherlands. Doctolib serves more than 80 million Europeans, offering a fast, frictionless, and secure journey for all their care needs.

Siilo and Doctolib’s joint goal is to improve the daily life of care teams through a new generation of technologies.

Your job:

In the Senior Backend Engineer role at Doctolib Siilo, you’ll work alongside a team that is passionate about building and delivering great products and great customer experience.

You’ll be responsible for everything on the server-side of our products; from supporting our client developers with design and development of APIs, until monitoring that our applications and databases are secure and running smoothly in the AWS cloud. Alongside that, you’ll play an active role within our technical team, helping us shape our product vision and strategy.

This is a truly exciting role for an intelligent, self-motivated problem solver who has a track record of building industry changing software within early stage start-ups or scaling tech businesses. The opportunity that you have to drive our business forward in leaps and bounds is unparalleled!

You will be responsible for:

  • Building, owning and maintaining Doctolib Siilo’s backend providing API’s for our mobile and web clients using Java 17, Spring Boot, Akka and more. Additionally contribute to our web based internal admin-tool (Angular).
  • Managing and monitoring our cloud infrastructure at AWS that we are migrating to use “infrastructure-as-code” (Terraform) more and more
  • Ensuring our user’s data is safe and secure by keeping security and privacy front and center to everything you do.
  • Collaborating with your peers working on Android, iOS, web and Doctolib’s Rails backend building an awesome experience for our 650,000+ users and contributing directly to growing Doctolib Siilo's network of healthcare professionals.
  • The full development life cycle, including communicating with stakeholders (for instance product, design, QA) throughout the development process, as well as debugging production issues.

What we’re looking for from you:

  • 8+ years experience with API design and development using Java 8+ (we’re currently on Java 17)
  • Experience running software on cloud infrastructure, ideally AWS
  • Ideally experience with frameworks and libraries like Spring Boot, Akka and Protobuf
  • Experience working with database technologies, preferably JPA, MySQL, MongoDb and Elasticsearch/Opensearch
  • You enjoy figuring out why things work, not just that they work
  • You’re fluent in English

What we offer:

  • Company pension scheme through our partner Allianz
  • 27 days of annual leave per year (and the ability to accrue more days on your work anniversary!)
  • Flexibility days allowing to work in EU countries and the UK (10 days per year)
  • Free mental health and coaching services through our partner Moka.care
  • Free breakfast and lunch plan every day on-site.
  • Bike lease scheme with our partner Lease a Bike, 35% price below the market.
  • Discounted membership with Urban Sports Club.
  • Continuous training programs on all key competencies (English, soft skills, expertise)
  • Reimbursement of public transportation if you live outside the Amsterdam highway ring
  • Parent Care Program: Various initiatives supporting parenthood, including 100% paid parental leave up to 16 weeks, including bonuses, for mothers and up to 5 weeks for the co-parent, flexible return and 3 days of leave per year for child sickness.
  • Relocation support for international mobilities

Siilo was founded in 2015 to achieve one goal: to practice medicine together. To achieve this, Siilo developed the secure messenger for medical professionals.

IT
Amsterdam
50 employees