71 Best domestic gas engineer Jobs in London (September 2025)

HotGreen Solutions

Senior Heat Pump Product Engineer

2 days ago

London

About HotGreen Most of the goods consumed on a daily basis have gone through some form of industrial heating process, collectively responsible for 19% of global emissions. Yet for over 150-years a solution has existed which can electrify process heat: industrial heat pumps. HotGreen exists to make heat pumps commercially-viable to industry. With smart-engineering solutions and a patent-pending compressor technology, we are making heat pumps a competitive option versus traditional boilers: saving plants money by switching to green steam. Who we are We (Georgia and Andrew) created HotGreen out of a frustration with the lack of affordable green heating solutions for industry. With industry facing mounting cost pressures and shrinking margins alongside the climate crisis, we identified an urgent need for technologies that enabled profitable decarbonization of industrial heat - helping plants save money while cutting emissions. This comes from a fundamental belief that only by making decarbonization profitable and technologies accessible can the transition to net zero be accelerated across industrial sectors. As engineers, we believe technology can provide an economically-driven pathway that doesn't rely on subsidies or regulation to achieve mass industrial decarbonization. The industrial heat we're targeting - low and mid temperature ranges below 250°C - represents 10% of global emissions. We're building the most commercially viable heat pump to tackle this massive opportunity, creating solutions that industry is actively incentivized to adopt and that will finally retire fossil-fuel powered boilers. Our values As a team, we think of ourselves as playing ‘Jazz’. Andrew and I as co-founders have very minimal overlapping skills. We trust each other with our respective instruments and parts in the piece, and lean into playing music that’s never been played before and without a musical score. While each of us can respectively hold an incredible ‘solo’, collectively we can create something exceptional. We are looking to bring on new ‘band members’ who are exceptional at their respective skillsets, but whom can also work well as part of the team and complement those around them. HotGreen has been built with the following values: • Bold: We are bold in our ambitions, and unafraid to look, act and think differently to the fossil-fuel powered boiler industry, or to our other heat pump allies. We are not afraid to go where others have not., • Simple, transparent and direct: Simplification runs through everything we do, from the design of our systems to the way we communicate. We actively identify simpler pathways, work hard to avoid overcomplication, and put effort into communicating in a way that is straightforward and concise., • Impact-focused: We relentlessly focus our work on the outcome in mind and the impact we are looking to achieve. We say no and set boundaries on tasks which do not support impact., • Reliable and customer-oriented: We are open, honest and transparent about what we are able to do and achieve. We are endlessly curious about our customers, their needs and desires, and how they work. We are committed to delivering excellent results for our customers., • Cross-domain problem-solvers: We are pragmatic problem solvers, who iterate, innovate and work our way to solving problems large and small. We find our way to solutions regardless of whether those problems lie inside or outside our field of expertise and responsibility., • Uncompromising excellence: We believe the climate crisis and our customers’ demands nothing less than exceptional work. We maintain high standards across every dimension of what we do and seek out colleagues, partners, and suppliers who elevate our collective performance. Job description We are hiring a heat pump design engineer whose fundamental role is to take our novel compressor and design and oversee the build of a heat pump product that is successfully deployed at an industrial site. You will be employee number 1. By nature of being an early-stage, fast-moving start-up, you will not initially have direct reports, but you will need to hire in time to develop out our technology department. The job is primarily an in-person role. We are identifying a site at present in the broader Greater London (West) / Reading area likely on the Elizabeth or Waterloo lines. We have to date been based in Datchet but are relocating to a new site. • Design industrial heat pump systems and adapt designs to meet unique, site-specific requirements for food & beverage industrial facilities., • Lead front-end development and system packaging for customers, ensuring smooth integration with existing plant infrastructure and providing design-for-installation support., • Experience working with steam systems to effectively integrate our steam generating heat pump into the pipework of an industrial site, • Engineer hybrid heating solutions by integrating heat pumps with gas boiler systems, enhancing process energy flexibility in large installations., • Serve as the primary technical expert and liaison for industrial customers, providing engineer-to-engineer support from system concept through commissioning., • Interpret customer process and utility data to develop technical proposals, including performing detailed sizing calculations for industrial-scale heat pumps., • Support the commercial team by enabling technical sales conversations and presenting at industry events and conferences. Advise clients and project partners on design, operation, and optimization of heat pump installations at large industrial sites., • Select and integrate high-capacity components such as condensers, evaporators, valves, and controls—all tailored for demanding industrial environments., • Ensure industrial systems comply with regulation, code, safety, and reliability standards; stay current on emerging regulations, standards and practices., • Translate demonstrator data and customer feedback into actionable product improvements for future products. Required Skills & Qualifications • Bachelor’s or Master’s degree in Mechanical, Chemical/Process, Design or Energy Engineering (or related discipline)., • Several years’ experience with HVAC, refrigeration cycles, process systems, and hybrid heating solutions with a focus on industrial deployment, • Deep understanding of thermodynamics, fluid mechanics, and heat transfer as applied to industrial energy systems., • Advanced proficiency with engineering and simulation tools (e.g., Solidworks, Ansys) and interpreting P&ID drawings., • Strong communication skills with ability to support engineer-to-engineer sales and interface effectively with clients, project teams, and field engineers., • Willingness to travel for site surveys, installation support, and customer meetings (domestic/international as needed)., • Right to work in the UK If you fulfil some but not all of the criteria above, but believe you would be well suited to lead the design and build of our heat pump product, then we encourage you to still apply. How to apply Send a PDF CV and Cover Letter to with the subject: "[FIRST NAME, SURNAME] Senior Heat Pump Engineer". Within your cover letter, answer the following three questions: 1.Why are you interested in applying for HotGreen? 2.What experience do you have that will enable HotGreen’s first industrial deployment to be a success? 3.What frustrates you about industrial heat pumps today? Applications to any other email address or via LinkedIn will not be reviewed. Deadline: 7th September We will be beginning interviews on the 8th of September. As such, if we have sufficiently high quality candidates apply, we will be closing the funnel to new candidates.

Domestic gas engineer jobs in LondonCreate job alerts

Popular jobs searches in London

Popular domestic gas engineer jobs locations