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Senior Mobile Engineer - Android (x/f/m)

Posted 24 Jul 2025
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Work experience
5 to 20 years
Full-time / part-time
Full-time
Job function
Degree level
Required language
English (Fluent)

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Join Doctolib Siilo and Help Shape the Future of Healthcare Communication

About Doctolib Siilo:

Siilo is a secure medical communication app designed for healthcare professionals. More than 900,000 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:

As a Senior iOS Engineer at Doctolib Siilo, you’ll be working with a multicultural and diverse engineering team further developing our secure messenger app. As a member of our iOS team, you’ll be directly contributing to develop and maintain our industry-leading app, which is trusted and used by thousands of healthcare professionals every day. You'll be involved in the technical design of new features and play a key role in implementing these features together with the team. In our codebase, we use a mix of UIKit and SwiftUI, RxSwift, Combine and our app uses end-to-end encryption, and strong cryptography for local storage and data exchange, so you should be comfortable with most of these technologies. Our team strives to always deliver high quality code and every feature we develop is evaluated and tested by our QA team. We are proud to have 99.9% crash-free users! We value certain aspects of Scrum, such as the morning stand-up and retrospective, but at the same time strive to maintain a pragmatic approach, minimising meetings and prioritising developer happiness to the fullest.

You will be responsible for:

  • Building new features in Swift for our iOS application, maintaining and improving our current codebase.
  • You'll be using frameworks such as Alamofire, RxSwift and SQLiteCipher.
  • The full development life cycle, including communicating with stakeholders (for instance product, design, QA) throughout the development process, as well as debugging production issues.
  • You'll be involved with not only engineering, but also with product-related and design discussions and decisions.
  • Owning the tech and deploying code every day.
  • Keeping security and privacy front and center to everything you do.

What we’re looking for from you:

  • 5+ years of experience with iOS development; fluency in Swift and comfort using UIKit, SwiftUI, RxSwift, and Combine
  • You're passionate about writing clean, tested, and well-documented code
  • You are willing to always discuss new ideas and approaches to solve problems. You understand that the technologies surrounding iOS development are always evolving and you are eager to learn, code and share new solutions with your colleagues
  • You love to work collaboratively. You understand that the whole is greater than the sum of the parts
  • You're comfortable with using 3rd-party libraries and dependency managers (we use CocoaPods and SPM)
  • Fluent in English
  • Experience with the following is a plus:
  • Reactive programming (we use RxSwift and are moving our project to Combine)
  • Cryptography
  • Secure storage of data (keychain, encrypted database, data protection)
  • Delivering universal apps
  • Contributing to open-source projects
  • Modularized projects
  • Circle CI and / or fastlane tools

Our team members are rewarded well, not only from a salary perspective but also with:

  • 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
  • Learning & development opportunities
  • Team spirit & creativity budget
  • Solidarity Days (2 days per year to help health charities and create a positive social impact)
  • Wellbeing program (free mental health and coaching offer with our partner moka.care)
  • A flexible workplace policy offering a hybrid work mode
  • Home office equipment allowance
  • Reimbursement of public transportation if you live outside the Amsterdam highway ring
  • 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