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Principal Software Engineer

Posted: 27 Jan 2020
London, United Kingdom
Permanent & Full-time D31EC52D34

About the team

Bulb is here to help our members cut their energy bills and reduce their carbon emissions. Our product teams make that happen. We’re developing products that will deliver the future of energy - from using AI to read energy meters, to making carbon offsetting fun and simple, from finding out how to get the most from Smart Meter data to helping people get paid for their solar energy. We also power the sign-up journey that helped us become the fastest growing company in the UK last year and the internal tools that let us deliver a an excellent Trust Pilot score.

The following pods are hiring Principal Engineers:


Covers member web and mobile apps as well as tooling that support our Energy Specialists to deliver #1 member experience. Experience in bringing productivity improvements for internal teams is very beneficial.

Requires genuine full-stack skills and experience, nice to see integrations with 3rd parties predominantly for helpdesk, telephony, chat.


At Bulb we want to hire people with the experiences necessary to get going quickly, but who are also interested in learning new things and are comfortable working in a changing environment.

  • Expert level knowledge in multiple technologies
  • Work with CTO to define long term technical strategy, guidelines and principles, and align multiple teams spanning 20+ engineers across multiple pods
  • Take ownership for large projects stretching beyond quarterly planning ensuring successful delivery, but don’t shy away from harder tactical improvements
  • Identifies and plans strategic improvements across operation of multiple pods / organisation
  • Help us hire and onboard senior and specialist roles and support the growth of engineers across multiple pods.
  • Bootstraps new pods ensuring technical alignment at an early stage.

Tech Stack

At Bulb we use a wide variety of technologies. While we have core technologies that we work with, we're always trying to pick the best tool for the job, and are always looking at what's on the horizon.

Our stack currently includes, but is not limited to:

  • Node, Typescript, Koa, GraphQL React, React Native, Webpack, Babel
  • CircleCI, Kubernetes, Docker and Google Cloud Platform

Ideally, you would be familiar with these technologies or similar patterns; notably, Typescript/Javascript coupled with React is a core technology for us. But we’re more interested in your broad experience of software development than of specific tools or libraries. You should be comfortable getting up-to-speed quickly in new tools and platforms. You should be pragmatic and experienced enough to know when a different choice of technology would be more suitable, and comfortable leading explorations into new technologies.

Team Structure

Teams at Bulb are cross-functional, self-organized and autonomous pods. The key features of this structure are:

  • You’ll be working within a growing cross functional team composed of specialists with backgrounds in DevOps, Engineering and Security.
  • We practice Scrum/Kanban and work lean.
  • Work is not siloed, you’re able to commit across the stack, and you have a view of all the features the team are working on.
  • We use data to drive continuous improvement in our development process and we review this data in our fortnightly retrospectives.


  • Be part of a growing technology startup and help shape the future of energy.
  • 33 days holiday a year (including bank holidays) and the option to buy up to 5 more.
  • After a year at Bulb, you can take an additional month of unpaid leave to travel, work on personal projects or simply to recharge and reboot.
  • 12 weeks of full pay for maternity, paternity or adoption leave.
  • Every team member has the option to buy shares in Bulb at a later date, at a discounted price. We all own a bit of Bulb.
  • Activities to improve your mental and physical well being including office yoga and meditation.
  • Private health care with Vitality
  • Pension plan with employer contributions, and a cycle to work scheme.


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