• IUK_RA
  • _

Experienced React Developer - Full Time or Contract

Applicants must be UK tax residents but may work fully or partially remote.


Our purpose is to reduce energy consumption and cut carbon emissions using our IoT product in one of the most polluting industries - our buildings. Our core product is a smart occupancy level sensor, which can currently be found  controlling ventilation in buildings used by clients such as Heathrow Airport, British Gas and Transport for London.

We have just started a COVID focussed project, part of this will be developing our nascent web front-end to display sensor data and analysis that will help clients understand, redesign and reopen their buildings.

We are seeking someone with a strong working knowledge of React interested in joining our team to help us develop our web platform, primarily working on the front-end.. You will have the opportunity to contribute to the entire stack and have a big influence on the success and growth of our core product and business.

WHERE - London, Paddington

LightFi is based in London with offices in Paddington.

Applicants must be UK tax residents but may work fully or partially remote.


We are looking for experienced React developer able to call on the latest JavaScript principles and leverage React and its ecosystem of technologies.

  • You should have the skills, desire and experience to take ownership of much of our front-end development.
  • You will interact directly with technical lead and company management to develop exciting new IoT-data driven interfaces; including mapping, data visualisation, real world data analysis and more.
  • You will be primarily responsible for building and maintaining web dashboard front end components.
  • As a core team member of a small tech team with a wide technology platform there will be opportunity for motivated individual to contribute and develop skills across a much wider stack. As such additional experience with python or data science would be valuable but not required.


  • JavaScript
  • React
  • HTML
  • CSS
  • APIs


  • UX design
  • Data visualisation


  • Python
  • IoT
  • automation
  • building control
  • PropTech


  • up to £240/day or £55,900/year depending on experience and skill
  • You will be on payroll (PAYE) full time, part time, or fixed term contract for a minimum of 9 months.

You will find purpose, doing something good and getting paid for it. There are immense learning and personal development opportunities to improve and expand your skill-set.

Applicants must be UK tax residents but may work fully or partially remote.