Mobile App Developer (Cross - Platform ) - Tellow

Job description

We are looking for a cross-platform mobile app developer to build a mobile application from the ground up. We will look to you to guide us in building the best possible mobile application from the ground up using your voice, viewpoint, knowledge, and expertise.

We aim for our code to be creative, scalable & reusable, and we seek someone who can proactively see trends and apply methods to maintain code quality and scalability, as these elements are becoming increasingly important in the tech landscape.

You will work within the product team with a dedicated product owner and lead engineer. You will be solely responsible for your work, as the team has a shared responsibility for the product as a whole.



  • Can code on a Champions League level.
  • Have a minimum of 4 years experience developing mobile applications.
  • Have experience with React Native or Flutter.
  • Have experience with handling API's
  • Good knowledge of UI/UX guidelines, frameworks, design patterns and Object Oriented Programming (OOP) design principles.
  • Are pragmatic, dedicated and think in solutions.
  • Care about quality. If it’s not the best, is it worth building?
  • Take initiative and are always keen to level up your skills.
  • Have excellent English verbal and written communication skills.


  • Develop cross-platform mobile applications that meet performance, scalability, reliability, and security needs.
  • Write Unit Tests using TDD principles, build and deploy apps with high quality.
  • Perform code reviews and assist in complex problem solving.
  • Collaborate with back-end developers, designers, and peers to deliver well-architected and high-quality solutions.
  • Manage schedules, create presentations and updates to team and management as needed.
  • Provide technical leadership and guidance to project team members.


We are a dedicated, open, and fun team based in Amsterdam, and we value talent and personal growth for all our employees. We offer a competitive salary, laptop, a brand-new office and a strong career growth path. We are an inspiring company with an ambitious mission, but having fun while working is key for us.

At Tellow, your benefits will include:

  • Personal growth plan that sets you on a path of career opportunity and advancement
  • Laptop (Macbook Pro) + 27 inch 4k screen
  • Free lunch (or allowance in pandemic times)
  • Working in a brand new, state-of-the-art office

You will also gain from:

  • A self-starter environment that entrusts you with crucial company responsibilities
  • Experience at a fast-growing scaleup
  • Working with the newest Fintech software
  • Healthy workspace with proper climate control, lighting, adjustable desks and 4K screens
  • A work environment that values inclusivity, teamwork, cohesion, and fun
  • Having your voice heard regarding company strategy and decisions


Please send us your resume, in English, and attach a 1-page cover letter about who you are, what you are looking for, and how you could help take Tellow to the top. We have a rolling evaluation process for all submitted applications, so you can expect to hear from us within 2 weeks of your application submission.

If you have any questions regarding the position you seek, please contact Juul Maas at


Upon review of your resume and cover letter, if you are selected, you will be invited to begin interviews with our team. The first round of those interviews will be with our Product Owner and Lead Engineer via video call. After that, we will ask you to do an assignment related to your prospective role to test your skills in the field, as we believe this is a strong predictor of your future work. For senior roles a cognitive ability test and personality assessment will be part of the process.

About Tellow

Tellow emerged in 2016 from Rabobank's Moonshot innovation program. Tellow continued as an independent organization to support the self-employed sector in the Netherlands with their online bookkeeping. Tellow makes various processes of bookkeeping easy and accessible through a user-friendly bookkeeping software.

In 2020, Tellow was acquired by The Ageras Group - an ambitious, young, fast-paced group of technology companies, with a shared vision of making life easier for business owners.

Our latest investment round proved quite successful, and we are now looking to scale our operations in 2021. After a capital injection of $73 million in The Ageras Group, Tellow is ready to build, innovate, and grow. We are expanding our teams and seeking talented individuals to support our growth and secure our foothold in the Dutch market.