Mid-level Front-end Developer

This is Undefined is looking for a Mid-level Front-end Developer to join their team.


This is Undefined is a small London-based product studio working together with startups across a range of different sectors. All ideas are different and we treat them that way. We love creating digital products with a purpose and are looking for someone to help us achieve that goal.

About the role:

We’re looking for a Javascript developer who is passionate about all things app & web and taking a human-first approach to digital products. In this role, you should be excited to dig deep into new platforms and grow alongside the company. You will be involved at every stage of the product development for both client & internal projects. We are looking for someone, excited to grow alongside the company and ready to make an impact.

The ideal candidate will be self-motivated, a creative problem solver and always looking to make improvements, knowledge of Firebase & React Native with experience working on production apps is advantageous but not essential. Our stack currently ranges from React (/Native), Gatsby & Firebase to Shopify.


  • Take a user-centered approach and rapidly test and iterate
  • Comfortable working in a fast-paced environment
  • Implement new feature to improve functionality
  • Build, test, and maintain front-end applications
  • Potential to be involved on the design side (not required)

About you:

  • Have multiple years of professional development experience
  • Experience integrating Api’s & Auth workflows
  • Would ideally have production experience with Firebase
  • Bonus to have FinTech
  • Bonus to have experience in working with React Native or Shopify
  • 1-2yrs agency experience with strong UI / UX understanding and creative mindset
  • The ability to conduct User Testing and QA testing is Bonus
  • A positive working attitude
  • Confident and professional

Come and join us! Please apply with your rates & availability.

Job Application Email Address: [email protected]


This is Undefined

A digital studio building Apps, Websites & E-stores for exciting startups & forward-thinking enterprises.


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