Senior Full Stack JS App Developer

Code is a high-end e-commerce agency with Shopify at its core. We build high-performing online stores and help merchants fully streamline their return process through our own Shopify App, Returner. Returner is an impactful exchange-first returns solution that enhances customer satisfaction and streamlines operations for leading brands like MR MARVIS.  

We're a team of 55 developers, project and customer success managers, marketers and strategists with a shared passion: e-commerce. We are remote-friendly and spread out across our three offices in Delft, Amsterdam and Berlin. With 16 different nationalities and over 40% women, we are a diverse team. We love our warm-hearted culture and daily lunches; being social is deeply rooted in our work culture. We have created a great place to work for our Coders and we constantly strive for a healthy work-life balance. 

About the role:

As we scale up Returner, we are looking for a senior Full-Stack JS App Developer to become the driving force behind our returns solution. This is your opportunity to take the lead in developing an existing app used by enterprise brands like MR MARVIS, Alpinestars and Stoov from front to back.

As a Senior developer for Returner, you will continuously implement new features, enhance existing functionality, and revolutionize the returns process for enterprise Shopify merchants and their customers. In this role, you’ll take technical ownership of the app and oversee both front- and backend development. How exciting is that? 

Senior Full Stack JS App Developer

About you:

You're a collaborative team player, comfortable working closely with a multi-disciplinary team including Returner’s Product Manager, Support Engineer, Solutions Engineer, Backend Developers and Sales Consultants.

Building a successful SaaS product that meets the ever-evolving needs of established brands truly excites you. You enjoy using your problem-solving skills to meet the needs of both merchants and end-consumers, ensuring an exceptional experience. Performance and scalability are central to everything you do.


  • Have extensive experience as a Full Stack Developer.
  • Are proficient in ReactJS for the frontend and NodeJS for the backend, with senior-level expertise and an equal focus on both technologies.
  • Have excellent communication skills and a collaborative mindset, with the ability to work effectively within a team environment. 
  • You feel comfortable working independently.
  • You are a mature conversation partner for your clients and able to effectively communicate your work to stakeholders
  • Have critical thinking skills and the ability to provide constructive feedback.
  • Are capable of working independently and taking initiative in problem-solving and decision-making.

Bonus points if you:

  • You have experience working with Shopify or other e-commerce platforms.
  • You are able to analyze the product from a commercial perspective, understanding and delivering on the business value.

What's in it for you:

  • You will work on fun, impactful, visible and challenging projects for growing brands in the Champions League of e-commerce.
  • Flexible location: possibility to work in our beautiful office in picturesque Delft, vibrant Amsterdam or remote - we meet up weekly during dev-days in the office in Delft, easy accessibility by public transport.
  • You will join an agency with high ambitions but realistic expectations. We actively facilitate a healthy work-life balance. 
  • Your personal and professional development is essential to us: together we invest in your growth.
  • Informal dress code and open culture – we like to feel at home! So expect to have fun with after-work drinks & team outings.
  • Being part of a team where your input will be valued and respected.
  • When we're out of office, we really are.
  • Tasty lunches provided at the office every day. You’ll be amazed by the lovely rendang that our Tsong-Fu prepares every month (veggie options as well!). Our fridge is fully stocked with beer and soda, so don’t worry about that. 

Do you not fully meet all the requested job requirements or experience? But do you get extremely excited about this role and Code? Then we encourage you to apply anyway.

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