Back-end (.NET/C#) Developer

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Back-end (.NET/C#) Developer

At Clay we’re building the future of access control. Are you looking for an opportunity to contribute to a large scale, complex product and see real-time impact of your work on hundreds of thousands of users worldwide? 

Do you want to join a fast-growing company serving globally? Are you looking to advance in your career and make an impact from day one? Then look no further, because we are looking for you! Help us win the battle against mechanical keys!

Full-time · Clay

Clay’s core mission is to grant easy access for businesses anywhere around the world, in a logical and user-friendly way. As a platform company we build world-class APIs and facilitate industry leaders to integrate cloud-based access control to their businesses.

Clay’s back-end developers build and expand APIs and work on an innovative smart lock API used by hundreds of thousands of people all over the world on a daily basis. Security, stability and scalability are our driving principles. 

What you'll do

You’ll get to work in a scrum team that consists of best-in-class developers. You will collaborate with your team to determine how to develop scalable backend systems and APIs. On a daily basis this means that you'll design, develop and maintain APIs and services of our KS Locking Platform.

We’re looking for developers experienced in writing distributed high-volume services; meaning you know how to deploy and keep services running in production; and you care about delivering high quality code. 

Technical skills and expertise
  • Enjoy and have experience building APIs (preferably have built APIs from scratch)

  • Experience in Scrum concepts and/or CI/CD tools to get your projects to production

  • Experience with applying SOLID principles, Unit testing and Integration testing

  • Experience in MySQL (MariaDB)

  • Experience in .NET standards 

  • Experience in ASP.NET, Web API, MVC, .NET Core

  • Deep knowledge of the .NET Framework and C#

  • Experience with Docker and Cloud providers

  • Experience with IoT Hub is highly desirable

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... 


Back-end developer


Product Owner


Back-end Developer

Working at Clay means becoming a ‘Brick’, and that means joining an international team of passionate professionals (we’re proud to say we have over 12 nationalities in our fairly small team) who take initiative, own responsibility and share expertise.

At Clay we live by our core values

At Clay, we are not only coding for a living; we also have a code running through our veins. Our core values, if you will. Conducted from the Bricks themselves, these values are embedded in our culture:

  • Passionate and proud, we are passionate about what we do. We take pride in our work and strive to improve ourselves continually and be flexible.
  • Stronger, together, we appreciate each other as unique individuals rather than ‘just colleagues’.
  • Inspired and inspiring, we are tech-savvy and fascinated by the product we build, being aware of the global impact our work has.
  • Honest and outspoken, we are all about transparency and we communicate openly without judgment or prejudice.

Wondering what it’s like to work at Clay?

Clay is a tight-knit team of technology lovers and innovative thinkers. Our team consists of over 12 nationalities (and growing), from a wide variety of backgrounds, 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 Amsterdam, collaborate closely with Salto Systems 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. Everyone on this team has a voice, we support each other's curiosity 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.