Mobile App Developer

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Mobile App Developer

At Clay we’re building the future of access control. Our mobile developers work on challenging projects involving latest technologies, Bluetooth, integrations of KSconnect and much more to build mobile apps that allow our customers to run their businesses on the go. As part of our dynamic team you will contribute to a large scale, complex product and see real-time impact of your work on hundreds of thousands of users worldwide. 

Ready to grow your career and make an impact from day one? Join us and let’s win the battle against mechanical keys!


As a platform company, we’re passionate about granting easy access and helping businesses, and some of the most exciting ideas we’ve had depend on mobile devices. Our mobile team builds apps for industry leaders to allow them to manage their businesses on the go with ease. 

What you'll do

Working within the Clay software development team, you will be in close collaboration with other developers to build new and innovative features. You will be the architect responsible for implementation of high-level user interfaces to optimize user experience; enhancing product performance; and development of mobile applications on iOS and Android, that grant and monitor access anytime, anywhere.

We’re looking for mobile developers with a deep understanding of the mobile landscape; can empathize with different types of users and a strong vision on what makes a great application.

Technical skills & expertise

  • Deep knowledge of at least one, but preferably both platforms: iOS and Android
  • Experience writing Android in Java/Kotlin
  • Experience writing iOS in Swift
  • Experience with best practice architectures for mobile apps
  • Experience with applying Dependency Injection and Unit Testing
  • Experience with consuming REST APIs
  • Experience in Scrum concepts is a big plus
  • At least 2 years of experience in a commercial environment

How we work

Global movements are created by united teams that work hard, think smart, and move at a fast pace. As an agile team with a growth mindset, we work with structured methods. We use hundreds of post-its a week, and always look for ways to improve our products. Our flow goes something like this, slightly changing from team to team:

You'll be working with... 


Mobile App developer 


Mobile App developer


Backend developer


QA engineer


Scrum Master

Working at Clay means becoming a ‘Brick’, and that means joining an international team, with 23 nationalities (!), of passionate professionals who take initiative, own responsibility and share expertise.

At Clay we live by our core values:

  • Innovation is in our veins; we strive for the best, we aim high.
  • We communicate openly, transparently and thoughtfully.
  • Each of us takes ownership and responsibility for our work.
  • We lead with kindness and by example; we bring out the best in each other.
  • When in doubt we act with courage, take intelligent risks and make wise decisions.
  • With endless curiosity we keep learning and improving, while knowing to seek assistance for rapid advancement.
  • We’re stronger together. As a team we’re passionate, collaborative, playful and proud.
  • To achieve the greatest we keep it simple, take small steps and always work smart. 

We expect everyone on our team to bring:

  • Team spirit; enjoying working with a diverse group of people with different expertise
  • A keen eye for detail; working at a fast-pace environment, managing and prioritizing goals
  • A high bar for excellence and pride in work
  • Eagerness to learn and investigate possibilities and applying insights from past experience
  • Self-discipline, professional attitude and collaborative spirit
  • Individuality and willingness to share ideas and new perspectives

Wondering what it’s like to work at Clay?

Clay is a tight-knit team of technology lovers and innovative thinkers. Our team is working on some of the most challenging problems in the access control industry.

To read some of the benefits Clay offers us check out our Careers page. But to give you some more insight into life at Clay here it goes; it’s great to have the ability to make an impact from day one, share ideas and shape the road map together. We work from our awesome office in the heart of Amsterdam, collaborate closely with SALTOSystems in Spain, and serve our customers globally.

At Clay we are encouraged to build ourselves along with our fast-growing company. This can be in the form of trainings, coaching, conferences and more. We grow together! We know best is yet to come. We support each other’s curiosity; we have tech talks, hackathons and open-invite dinners to talk about our company’s road map. Everyone on this team has a voice and we’re encouraged to not only participate and speak up, but also to lead and drive.

Beware; we work hard, play hard. Don’t underestimate either of those! We are honest, love a good joke, and don’t take things personally. And as a tight-knit team, together we form the solid house that is Clay.