Senior Applications Engineer

Applications & Integration Engineer
Full-Time | London | Engineering

About the Company

We are a thermal hardware technology company designing and deploying next-generation thermal energy systems. Our products sit at the intersection of hardware innovation and real-world integration — enabling industrial, commercial, and infrastructure customers to achieve significant gains in thermal efficiency and decarbonisation. We work on complex, first-of-kind deployments with demanding technical and commercial environments.

The Role

We are looking for an Applications & Integration Engineer to bridge our product capabilities with real-world customer deployments. This is a technically deep, commercially aware role that spans the full product lifecycle — from early-stage market discovery and feasibility work through to hands-on site commissioning, performance monitoring, and ongoing product improvement feedback.
You will be the primary technical point of contact across customer engagements, acting with confidence in both pre-sales and post-sales environments. You thrive navigating ambiguity, are comfortable on customer sites, and bring a systems-thinking mindset to every challenge.

Key Responsibilities

Pre-Sales & Applications Scouting

• Drive market adjacency mapping and use-case hypothesis development to identify new application opportunities for thermal hardware
• Lead field discovery activities including technical customer interviews and feasibility assessments
• Conduct fit-gap analyses to evaluate product readiness for new configurations and environments
• Contribute to techno-economic modelling and business case development alongside commercial colleagues
• Support initial proposal development (technical and commercial scope), early-stage negotiations, and business analysis activities
• Participate in market conversations and future product exploration initiatives

System Integration Engineering

• Own the detailed site data analysis and end-to-end system design process for customer deployments
• Define system P&IDs and interface documentation; size pipework and select appropriate valves and components
• Develop and maintain system performance models using contractor and customer-supplied data
• Define control philosophy, communications protocols, and high-level electrical design requirements
• Lead review and technical sign-off of contractor-produced P&IDs, schematics, and design calculations
• Identify, flag, and resolve design challenges or integration issues early in the project lifecycle
• Develop integration tooling as required to support project delivery

Site Commissioning & Deployment

• Act as the main technical point of contact throughout deployment and site start-up
• Produce technical commissioning documentation and define hold points for contractor teams
• Provide on-site commissioning support, with particular responsibility for first-of-kind configurations
• Witness and support Site Acceptance Testing (SAT) and deployment activities
• Troubleshoot integration and system issues during commissioning, working hands-on with contractor teams

Customer Lifecycle & Product Improvement

• Conduct thermal load profiling, demand modelling, and high-level input/output analysis for customer sites
• Generate and manage customer site requirements documentation
• Undertake site surveys and site readiness visits to inform design and planning decisions
• Perform compressor right-sizing and configuration analysis for each deployment
• Feed back product improvement insights and field learnings directly to R&D and product teams
• Support ongoing site maintenance oversight and performance monitoring activities

• Degree in Mechanical Engineering, Chemical Engineering, Energy Systems, or a closely related discipline
• Experience in system integration, applications engineering, or technical project delivery — ideally within thermal, HVAC, refrigeration, industrial gas, or energy hardware sectors
• Comfortable reading and producing P&IDs, schematics, and engineering calculations
• Hands-on experience with commissioning activities on physical hardware systems
• Strong technical communication skills — able to present clearly to both engineering and commercial audiences
• Comfortable in customer-facing settings, including site visits and technical sales conversations
• Self-directed, with the ability to manage multiple projects and stakeholders simultaneously

Desirable

• Experience with control system architectures and communications protocols (e.g. Modbus, BACnet, CAN)
• Background in compressor technology, heat pump systems, or industrial thermal processes
• Familiarity with techno-economic or systems performance modelling
• Experience working in a scale-up or early-commercial-stage hardware company

What They Offer

• The opportunity to work on technically novel thermal hardware at the frontier of industrial decarbonisation
• A varied, high-ownership role spanning commercial, design, and site delivery work
• A collaborative, engineering-led culture where your insights directly shape product development
• Competitive salary, equity participation, and benefits package
• Flexible hybrid working with regular site and customer travel