Senior Frontend Developer

Permanent employee, Full-time · Remote

About WhenThen
WhenThen is a venture-backed startup on a mission to help internet companies create fast and flexible payment flows in minutes, without code!

Our culture encapsulates some key elements such as working in a smart, collaborative and problem-solving way, always looking out for each other and doing well by doing good. It’s how we think and act every single day!

If you’re intrigued by “what if anything could trigger a transaction, and a transaction could trigger anything”, then join WhenThen and help us build the most innovative payment platform in the world. And power businesses of all types and sizes to transact with their customers in the ways they want.

What we're looking for
We are looking for a talented and hungry Senior Frontend Engineer with React experience to join our startup. 
What will you do
  • Work on our chatops layer
  • Work on our no-code builder experience
  • Develop reusable components to streamline future development
  • Own the development of features
  • Make architecture decisions
  • Mentor other members of the frontend team
You may be a fit if you have/are
  • Experience with AWS (an advantage but not essential)
  • Experience with chatbot frameworks (an advantage but not essential)
  • Experience with no-code or low-code (an advantage but not essential)
We need you to have
  • 5+ years’ experience in frontend development using Javascript, HTML, CSS and web application frameworks
  • At least 18 month experience in React
  • Thorough understanding of React and its core principles (Hooks, Redux, HOC, Styled Components)
  • Experience in building of responsive web applications
  • Experience implementing animation and transitions frameworks
  • Understanding how modern browsers work and familiarity with browser testing and debugging
  • Creating unit tests and e2e test suites
  • Experience using build tools and package managers
  • Integrating with backend REST and GraphQL APIs
  • Must be able to work in an agile environment and adapt to change
  • A learning- and growth-focused mindset and a strong desire to share your skills and learn from those around you
What we offer
  • Salary - Attractive competitive remuneration
  • Competitive stock options - Joining WhenThen means you’ll own a part of the company
  • Remote and flexible working - Work from home or any location with ease and flexibility
  • Team - Passionate hard-working and dedicated colleagues
  • Technology - Some cool tech to allow you to do your best work
  • Self-development - Annual professional development allowance
  • Company retreats - Company retreats (to really nice places!)
  • 4 day work weeks - we’re piloting a 4 day work week affording our team the time to rejuvenate and in turn boosting productivity

WhenThen is an employer that provides equal opportunities to all employees and applicants for employment without regard to sex, race, colour, ethnic or social origin, genetic features, language, religion or belief, political or any other opinion, membership of a national minority, property, birth, disability, age or sexual orientation.
We are looking forward to hearing from you!
Thank you for your interest in WhenThen. Please fill out the following short form. Should you have difficulties with the upload of your data, please send an email to

Please upload your CV (If you don’t have CV upload a blank pdf page, max. 20 MB in total).

Click to select multiple files or use drag-and-drop
Click to select multiple files or use drag-and-drop

Uploading document. Please wait.