Established in London in 2018, Fourier are a team of experienced recruiters specialising in information technology, trading technology and quant analytics. We provide contract and permanent personnel to clients including investment banks, proprietary traders, hedge funds and fintech’s.

<h3>About Fourier</h3>At Fourier, we’re making on-site hydrogen universally accessible. Our breakthrough architecture enables highly modular and fully automated electrolyzer systems that scale efficiently across a wide range of operating conditions. Backed by leading venture investors, we’re building real hardware to accelerate the transition to a clean energy future.<h3>About the Role</h3>We’re looking for a Manufacturing Engineer to help take our electrolyzer systems from prototype to scalable production. This role sits at the intersection of design, supply chain, and the factory floor. You’ll own manufacturing processes end-to-end—driving build quality, repeatability, cost reduction, and throughput as we scale. You will have the chance to bring up an electrolyzer system assembly line from scratch and shape how manufacturing at Fourier will transform.This is a hands-on role working directly with hardware, technicians, and cross-functional engineering teams.<h3>What You’ll Do</h3><ul style="min-height:1.5em"><li>Develop, document, and optimize manufacturing and assembly processes for electro/mechanical/fluidic systems </li><li>Own manufacturing process flows, work instructions, tool selection, BOMs, and build documentation </li><li>Support prototype builds, pilot production, and transition to low- and mid-volume manufacturing </li><li>Identify and resolve manufacturing issues related to yield, quality, cost, and reliability </li><li>Collaborate with design engineers to influence DFM/DFA early in the design cycle </li><li>Work closely with supply chain and vendors to qualify parts, tools, inventory, and processes </li><li>Design or specify fixtures, tooling, and test setups to support production and validation </li><li>Support root cause analysis and corrective actions for build or field issues </li><li>Help define manufacturing KPIs and continuous improvement initiatives </li></ul><h3>What We’re Looking For</h3><ul style="min-height:1.5em"><li>BS in Mechanical, Manufacturing, Industrial Engineering, or equivalent practical experience </li><li>3+ years of experience in a manufacturing, production, or process engineering role </li><li>Strong understanding of mechanical assemblies, tolerance stack-ups, and production workflows </li><li>Experience supporting hardware builds from prototype through production </li><li>Comfortable working hands-on in a lab or factory environment </li><li>Ability to troubleshoot and solve problems at the system and component level </li><li>Clear communicator who works well across engineering, operations, and supply chain </li></ul><h3>Nice to Have</h3><ul style="min-height:1.5em"><li>Experience with complex electro-mechanical or fluid systems </li><li>Background in clean tech, energy, aerospace, automotive, or industrial equipment </li><li>Familiarity with Lean manufacturing, PFMEA, 5S, or continuous improvement methodologies </li><li>Experience scaling manufacturing in an early-stage or fast-growing company </li></ul><h3>Why Join Fourier</h3><ul style="min-height:1.5em"><li>Mission-driven clean energy work with real-world impact </li><li>High ownership and visibility — your work directly shapes the product </li><li>Opportunity to grow into technical leadership or operations roles </li><li>Collaborative, hands-on engineering culture </li></ul><h3>What We Offer</h3><ul style="min-height:1.5em"><li>Competitive salary and equity commensurate with experience </li><li>Fully paid Medical, Dental, and Vision coverage </li><li>401(k) </li><li>Paid vacation and sick leave </li><li>Free lunches on-site</li></ul>

Manufacturing Engineer

<h3>Fourier Earth is seeking a detail-oriented part-time contractor to support the sourcing and procurement of critical mechanical parts and supplies for our hydrogen systems. This role will work closely with manufacturing, engineering, and operations to ensure the timely, cost-effective delivery of components needed for development and deployment.</h3>Responsibilities<ul style="min-height:1.5em"><li>Source and order critical mechanical parts, materials, and supplies </li><li>Identify, evaluate, and coordinate with vendors and suppliers </li><li>Track orders, lead times, and delivery schedules </li><li>Monitor and track procurement budgets and cost targets </li><li>Maintain clear purchasing documentation and records </li><li>Communicate proactively with internal teams and external vendors </li><li>Assist with inventory management </li></ul>Qualifications<ul style="min-height:1.5em"><li>Strong understanding of mechanical components, materials, and assemblies, with the ability to identify and source appropriate parts </li><li>Strong organizational and vendor coordination skills </li><li>Comfortable managing multiple orders and priorities in a part-time capacity </li><li>Clear, professional written and verbal communication </li><li>Familiarity with engineering workflows and hardware development environments is a plus </li></ul>Details<ul style="min-height:1.5em"><li>Part-time contract role </li><li>Flexible hours </li><li>Duration: TBD (project-based or ongoing support)</li></ul>

Part-Time Contractor – Mechanical Parts & Supply Chain Support

<h2>About Fourier</h2>Fourier is focused on making on-site hydrogen universally accessible. Our breakthrough architecture enables highly modular and fully automated electrolyzers that scale to any size and optimize efficiency at all loads.We are on a mission to transition the global energy landscape toward a purely sustainable and emission-free future by unlocking the full potential of hydrogen as a clean energy carrier.<h1>Role Overview</h1>Fourier Earth Inc. is seeking a Senior Manager of Power Electronics Engineering to lead the development of critical power electronics systems for our next-generation electrolyzer platforms. This role will combine deep technical expertise with strong leadership, guiding architecture decisions, driving hardware development, and building a high-performing engineering team.You will play a key role in developing high-efficiency power conversion systems that enable scalable hydrogen production and ensure our technology performs reliably across a wide range of operating conditions. You will lead the design, integration, and deployment of all electrical systems powering our H2 electrolyzers and all supporting equipment for a fully functional and automated hydrogen production system. The candidate will possess deep technical expertise in power conversion and industrial distribution, but have the broad systems-level vision to seamlessly integrate the hardware with mechanical constraints and software/firmware controls in a hazardous environment.The ideal candidate brings extensive experience in power electronics design, high-power systems, and system-level architecture in accordance with compliance standards, along with a proven ability to mentor engineers and lead complex hardware programs from concept through production.<h1>Responsibilities</h1><ul style="min-height:1.5em"><li>Architectural Leadership: Own the end-to-end electrical architecture from the 480V grid tie-in down to the 12V/24V DC sensor networks, ensuring clean power distribution, signal integrity, and EMI/EMC compliance.</li><li>Power Conversion &amp; Load Management: Oversee the design and specification of AC/DC rectification for the electrolyzer stack, DC/DC converters, and the integration of VFDs and SCR controllers for heavy industrial loads.</li><li>Systems Integration: Act as the technical bridge between Hardware, Controls, and Software teams. Define firmware requirements, state-machine logic, and communication protocols (Modbus, CAN, Profinet, etc.) to ensure seamless system operation.</li><li>Safety &amp; Compliance: Lead the design of electrical systems for hazardous environments (Class I, Div 1/2 or ATEX). Ensure all designs strictly adhere to NEC, UL, and relevant functional safety standards (IEC 61508/ISO 13849).</li><li>Team Management: Recruit, mentor, and manage a high-performing team of power electronics, electrical, and controls engineers.</li><li>Vendor &amp; Supply Chain Collaboration: Identify, evaluate, and manage external suppliers, component vendors, and contract manufacturers for critical power components (transformers, rectifiers, control panels).</li><li>Project Execution: Manage complex development schedules, budgets, and hardware development lifecycles from initial prototyping through to commercial-scale deployment. This includes best practices for schematic design, PCB layout, simulation and hardware validation to be presented and approved through design reviews.</li></ul><h2>Basic Qualifications</h2><ul style="min-height:1.5em"><li>Education: B.S. in Electrical Engineering or related field.</li><li>Experience: 12+ years of progressive engineering experience in power electronics, industrial automation, or renewable energy systems.</li><li>Leadership: 5+ years of direct engineering management experience leading cross-functional hardware/systems teams.</li><li>Technical Mastery: Proven expertise in 480V (3-phase) AC power distribution, AC/DC rectification, and isolating low-voltage instrumentation networks from high-voltage noise. Strong demonstration of root cause analysis and system optimization for high velocity design and implementation.</li><li>Controls &amp; Comms: Strong familiarity with PLC/PAC architectures and industrial fieldbus networks.</li><li>Safety Standards: Deep working knowledge of NEC (NFPA 70), UL 508A, and high-voltage safety protocols (LOTO, grounding/bonding).</li></ul><h2>Preferred Qualifications</h2><ul style="min-height:1.5em"><li>M.S. or Ph.D. with a focus on Power Electronics, Power Systems, or Control Systems.</li><li>Direct industry experience in hydrogen infrastructure, electrochemistry, oil &amp; gas, or large-scale energy storage.</li><li>Experience designing systems specifically for hazardous locations (hydrogen gas environments).</li><li>Strong background in thermal management of high-power electronics (liquid/air cooling strategies).</li></ul><ul style="min-height:1.5em"><li>Experience supporting manufacturing scale-up and production environments. This may include startup or high-growth technology company experience.</li></ul><h1>Why Join Fourier</h1><ul style="min-height:1.5em"><li>Help build technology that directly accelerates the clean energy transition.</li><li>Work on cutting-edge hydrogen production systems.</li><li>Join a mission-driven team solving one of the most important challenges in global energy.</li></ul>

Director/Senior Manager, Electronics Engineering

<h2>About Fourier</h2>Fourier is focused on making on-site hydrogen universally accessible. Our breakthrough architecture enables highly modular and fully automated electrolyzers that scale to any size and optimize efficiency at all loads.We are on a mission to transition the global energy landscape toward a purely sustainable and emission-free future by unlocking the full potential of hydrogen as a clean energy carrier.<div style="min-height:1.2em;margin-top:0;margin-bottom:0"> </div><h1>Role Overview</h1>Fourier Earth Inc. is seeking a Senior Manager of Power Electronics Engineering to lead the development of critical power electronics systems for our next-generation electrolyzer platforms. This role will combine deep technical expertise with strong leadership, guiding architecture decisions, driving hardware development, and building a high-performing engineering team.You will play a key role in developing high-efficiency power conversion systems that enable scalable hydrogen production and ensure our technology performs reliably across a wide range of operating conditions. You will lead the design, integration, and deployment of all electrical systems powering our H2 electrolyzers and all supporting equipment for a fully functional and automated hydrogen production system. The candidate will possess deep technical expertise in power conversion and industrial distribution, but have the broad systems-level vision to seamlessly integrate the hardware with mechanical constraints and software/firmware controls in a hazardous environment.The ideal candidate brings extensive experience in power electronics design, high-power systems, and system-level architecture in accordance with compliance standards, along with a proven ability to mentor engineers and lead complex hardware programs from concept through production.<h1>Responsibilities</h1><ul style="min-height:1.5em"><li>Architectural Leadership: Own the end-to-end electrical architecture from the 480V grid tie-in down to the 12V/24V DC sensor networks, ensuring clean power distribution, signal integrity, and EMI/EMC compliance.</li><li>Power Conversion &amp; Load Management: Oversee the design and specification of AC/DC rectification for the electrolyzer stack, DC/DC converters, and the integration of VFDs and SCR controllers for heavy industrial loads.</li><li>Systems Integration: Act as the technical bridge between Hardware, Controls, and Software teams. Define firmware requirements, state-machine logic, and communication protocols (Modbus, CAN, Profinet, etc.) to ensure seamless system operation.</li><li>Safety &amp; Compliance: Lead the design of electrical systems for hazardous environments (Class I, Div 1/2 or ATEX). Ensure all designs strictly adhere to NEC, UL, and relevant functional safety standards (IEC 61508/ISO 13849).</li><li>Team Management: Recruit, mentor, and manage a high-performing team of power electronics, electrical, and controls engineers.</li><li>Vendor &amp; Supply Chain Collaboration: Identify, evaluate, and manage external suppliers, component vendors, and contract manufacturers for critical power components (transformers, rectifiers, control panels).</li><li>Project Execution: Manage complex development schedules, budgets, and hardware development lifecycles from initial prototyping through to commercial-scale deployment. This includes best practices for schematic design, PCB layout, simulation and hardware validation to be presented and approved through design reviews.</li></ul><h2>Basic Qualifications</h2><ul style="min-height:1.5em"><li>Education: B.S. in Electrical Engineering or related field.</li><li>Experience: 12+ years of progressive engineering experience in power electronics, industrial automation, or renewable energy systems.</li><li>Leadership: 5+ years of direct engineering management experience leading cross-functional hardware/systems teams.</li><li>Technical Mastery: Proven expertise in 480V (3-phase) AC power distribution, AC/DC rectification, and isolating low-voltage instrumentation networks from high-voltage noise. Strong demonstration of root cause analysis and system optimization for high velocity design and implementation.</li><li>Controls &amp; Comms: Strong familiarity with PLC/PAC architectures and industrial fieldbus networks.</li><li>Safety Standards: Deep working knowledge of NEC (NFPA 70), UL 508A, and high-voltage safety protocols (LOTO, grounding/bonding).</li></ul><h2>Preferred Qualifications</h2><ul style="min-height:1.5em"><li>M.S. or Ph.D. with a focus on Power Electronics, Power Systems, or Control Systems.</li><li>Direct industry experience in hydrogen infrastructure, electrochemistry, oil &amp; gas, or large-scale energy storage.</li><li>Experience designing systems specifically for hazardous locations (hydrogen gas environments).</li><li>Strong background in thermal management of high-power electronics (liquid/air cooling strategies).</li></ul><ul style="min-height:1.5em"><li>Experience supporting manufacturing scale-up and production environments. This may include startup or high-growth technology company experience.</li></ul><h1>Why Join Fourier</h1><ul style="min-height:1.5em"><li>Help build technology that directly accelerates the clean energy transition.</li><li>Work on cutting-edge hydrogen production systems.</li><li>Join a mission-driven team solving one of the most important challenges in global energy.</li></ul>

Director/Senior Manager, Electronics Engineering - India

Fourier is on a mission to make on-site hydrogen universally accessible. Our breakthrough architecture delivers highly modular, fully automated electrolyzer systems that scale to any capacity and optimize efficiency across all load profiles. We are building the infrastructure necessary for a purely sustainable, emission-free global energy future — and we need exceptional engineers to help us get there.<h2>About the Role</h2>We are seeking a Senior Mechanical Engineer with deep hands-on expertise to lead mechanical design, analysis, integration, and validation of our commercial hydrogen production systems. This is a high-ownership role spanning all subunits and design aspects and the full balance-of-plant envelope that ties them together.This role sits at the intersection of mechanical, electrical, and manufacturing disciplines. You will co-own DFM/DFA strategy with our manufacturing partners and serve as the primary mechanical interface to our electrical and electronics engineering teams — ensuring that both high-voltage (HV) power conversion systems and low-voltage (LV) control and sensing electronics are packaged safely, thermally managed, and fully integrated into production enclosures. <h2>Roles and responsibilities</h2><ul style="min-height:1.5em"><li>Lead concept development, design trades, and down-select decisions for all mechanical subsystems from water purification through post-production H₂ purification</li><li>Own 3D CAD design of complex parts and assemblies using SolidWorks or equivalent — including sheet metal, plastics, insulation systems, sealing methods, connectors, and fasteners</li><li>Review and develop process flow diagrams, P&amp;IDs, and mechanical design documentation</li><li>Perform first-principles hand calculations for sizing and performance of fluid, thermal, and structural systems</li><li>Collaborate closely with the electrical and electronics engineering teams to integrate high-voltage (HV) power electronics and low-voltage (LV) control, sensing, and communications systems into mechanical enclosures</li><li>Design packaging solutions for HV electrical assemblies — including bus bars, power modules, and high-current connectors — ensuring proper insulation, creepage/clearance compliance, and thermal management</li><li>Design and validate cooling technologies (heat exchangers, forced-air systems) for thermal management of electrolyzer stacks, power electronics, and ancillary electrical components</li><li>Ensure enclosure designs meet relevant electrical safety standards (UL, IEC, NFPA) for HV systems handling DC bus voltages typical of PEM electrolysis applications</li><li>Define and manage interface control documents (ICDs) between mechanical and electrical subsystems</li><li>Partner actively with manufacturing engineering to embed Design for Manufacturability (DFM) and Design for Assembly (DFA) principles from the earliest concept phase through production release</li><li>Create and maintain full Balance-of-Plant (BoP) documentation including Bills of Materials, P&amp;IDs, and fluid system specifications</li><li>Hands-on experience or strong familiarity with gas (hydrogen, nitrogen, oxygen) and water piping systems, including pressure ratings, material compatibility, and leak testing protocols</li><li>Develop test plans and lead laboratory test and validation activities to confirm product reliability, safety, and performance</li><li>Create and maintain PLM documentation including Bills of Materials, engineering drawings, design calculations, and FMEAs</li></ul><h2>Qualifications</h2>Required:<ul style="min-height:1.5em"><li>B.S. in Mechanical Engineering or equivalent; 6+ years of relevant experience in commercial product design and development</li><li>First-principles understanding of statics, mechanics, materials science, heat transfer, thermodynamics, and fluid dynamics — with the ability to apply these rapidly in hand calculations</li><li>Extensive experience taking mechanical designs from concept through production, including prototype builds and manufacturing release</li><li>Proven experience in DFM/DFA — working hand-in-hand with manufacturing partners to optimize designs for producibility, assembly, and reliability</li><li>Demonstrated experience packaging and integrating electromechanical systems involving both HV and LV electrical components</li><li>Proficiency in 3D CAD (SolidWorks strongly preferred) and Thermal &amp; Structural FEA tools</li><li>Strong hands-on aptitude — comfortable in the lab, on the shop floor, and at the test rig</li><li>Experience creating GD&amp;T-compliant 2D fabrication drawings (ASME Y14.5)</li></ul>Preferred:<ul style="min-height:1.5em"><li>Advanced degree (M.S. or Ph.D.) in Mechanical Engineering or closely related field</li><li>Experience with PEM electrolysis, fuel cell systems, or related electrochemical systems</li><li>Hands-on experience with hydrogen, oxygen, nitrogen, or other high-purity gas systems — including pressure management, material selection (316L SS, PTFE, PEEK), and leak testing</li><li>Experience with water purification technologies (deionization, ultrafiltration, reverse osmosis) and post-production gas purification</li><li>Multi-physics and CFD simulation experience (ANSYS Fluent, COMSOL, or similar)</li><li>Familiarity with electrical safety standards relevant to HV systems: UL 508A (industrial control panels), IEC 60204, NFPA 70E</li><li>Experience with PLM systems for BOM and drawing management</li></ul><h2>What we offer</h2><ul style="min-height:1.5em"><li>Fully paid Medical, Dental, and Vision coverage</li><li>Competitive salary and equity compensation commensurate with experience</li><li>401k Retirement Plan</li><li>Diverse and inclusive work environment</li><li>Paid sick days and vacation</li><li>In-office lunches</li><li>The opportunity to make a material impact on the global clean energy transition</li></ul>

Sr. Mechanical Engineer

<h1>Sr. Mechanical Engineer</h1>Fourier is on a mission to make on-site hydrogen universally accessible. Our breakthrough architecture delivers highly modular, fully automated electrolyzer systems that scale to any capacity and optimize efficiency across all load profiles. We are building the infrastructure necessary for a purely sustainable, emission-free global energy future — and we need exceptional engineers to help us get there.<h2>About the Role</h2>We are seeking a Senior Mechanical Engineer with deep hands-on expertise to lead mechanical design, analysis, integration, and validation of our commercial hydrogen production systems. This is a high-ownership role spanning all subunits and design aspects and the full balance-of-plant envelope that ties them together.This role sits at the intersection of mechanical, electrical, and manufacturing disciplines. You will co-own DFM/DFA strategy with our manufacturing partners and serve as the primary mechanical interface to our electrical and electronics engineering teams — ensuring that both high-voltage (HV) power conversion systems and low-voltage (LV) control and sensing electronics are packaged safely, thermally managed, and fully integrated into production enclosures. <h2>Roles and responsibilities</h2><ul style="min-height:1.5em"><li>Lead concept development, design trades, and down-select decisions for all mechanical subsystems from water purification through post-production H₂ purification</li><li>Own 3D CAD design of complex parts and assemblies using SolidWorks or equivalent — including sheet metal, plastics, insulation systems, sealing methods, connectors, and fasteners</li><li>Review and develop process flow diagrams, P&amp;IDs, and mechanical design documentation</li><li>Perform first-principles hand calculations for sizing and performance of fluid, thermal, and structural systems</li><li>Collaborate closely with the electrical and electronics engineering teams to integrate high-voltage (HV) power electronics and low-voltage (LV) control, sensing, and communications systems into mechanical enclosures</li><li>Design packaging solutions for HV electrical assemblies — including bus bars, power modules, and high-current connectors — ensuring proper insulation, creepage/clearance compliance, and thermal management</li><li>Design and validate cooling technologies (heat exchangers, forced-air systems) for thermal management of electrolyzer stacks, power electronics, and ancillary electrical components</li><li>Ensure enclosure designs meet relevant electrical safety standards (UL, IEC, NFPA) for HV systems handling DC bus voltages typical of PEM electrolysis applications</li><li>Define and manage interface control documents (ICDs) between mechanical and electrical subsystems</li><li>Partner actively with manufacturing engineering to embed Design for Manufacturability (DFM) and Design for Assembly (DFA) principles from the earliest concept phase through production release</li><li>Create and maintain full Balance-of-Plant (BoP) documentation including Bills of Materials, P&amp;IDs, and fluid system specifications</li><li>Hands-on experience or strong familiarity with gas (hydrogen, nitrogen, oxygen) and water piping systems, including pressure ratings, material compatibility, and leak testing protocols</li><li>Develop test plans and lead laboratory test and validation activities to confirm product reliability, safety, and performance</li><li>Create and maintain PLM documentation including Bills of Materials, engineering drawings, design calculations, and FMEAs</li></ul><h2>Qualifications</h2>Required:<ul style="min-height:1.5em"><li>B.S. in Mechanical Engineering or equivalent; 6+ years of relevant experience in commercial product design and development</li><li>First-principles understanding of statics, mechanics, materials science, heat transfer, thermodynamics, and fluid dynamics — with the ability to apply these rapidly in hand calculations</li><li>Extensive experience taking mechanical designs from concept through production, including prototype builds and manufacturing release</li><li>Proven experience in DFM/DFA — working hand-in-hand with manufacturing partners to optimize designs for producibility, assembly, and reliability</li><li>Demonstrated experience packaging and integrating electromechanical systems involving both HV and LV electrical components</li><li>Proficiency in 3D CAD (SolidWorks strongly preferred) and Thermal &amp; Structural FEA tools</li><li>Strong hands-on aptitude — comfortable in the lab, on the shop floor, and at the test rig</li><li>Experience creating GD&amp;T-compliant 2D fabrication drawings (ASME Y14.5)</li></ul>Preferred:<ul style="min-height:1.5em"><li>Advanced degree (M.S. or Ph.D.) in Mechanical Engineering or closely related field</li><li>Experience with PEM electrolysis, fuel cell systems, or related electrochemical systems</li><li>Hands-on experience with hydrogen, oxygen, nitrogen, or other high-purity gas systems — including pressure management, material selection (316L SS, PTFE, PEEK), and leak testing</li><li>Experience with water purification technologies (deionization, ultrafiltration, reverse osmosis) and post-production gas purification</li><li>Multi-physics and CFD simulation experience (ANSYS Fluent, COMSOL, or similar)</li><li>Familiarity with electrical safety standards relevant to HV systems: UL 508A (industrial control panels), IEC 60204, NFPA 70E</li><li>Experience with PLM systems for BOM and drawing management</li></ul><h2>What we offer</h2><ul style="min-height:1.5em"><li>Fully paid Medical, Dental, and Vision coverage</li><li>Competitive salary and equity compensation commensurate with experience</li><li>Diverse and inclusive work environment</li><li>Paid sick days and vacation</li><li>In-office lunches</li><li>The opportunity to make a material impact on the global clean energy transition</li></ul>

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