Product Development – Mechanical - Milton Keynes - Hirenex

    Hirenex
    Hirenex Milton Keynes

    6 days ago

    Full time
    Description

    We're looking for a Mechanical Product Development Engineer with strong experience in hydraulics, pressure systems, and sealing design to support the design and development of mechanical products used in data centre liquid cooling and HVAC-related applications.


    This role covers the full product lifecycle — from concept generation and CAD design through prototyping, testing, validation, compliance, and handover into production.

    You'll be responsible for developing components and systems that operate under pressure, maintain leak-tight integrity, and integrate into electromechanical assemblies.

    Key Responsibilities



    Design and develop hydraulic and pressure-bearing systems, including pumps, valves, fittings, manifolds, fluid conduits, and pressure-rated assemblies



    Engineer sealing interfaces such as O-ring grooves, gaskets, metal-to-metal seals, and welded/fabricated pressure boundaries



    Produce 3D CAD models, mechanical drawings, tolerance analyses, pressure calculations, and technical documentation



    Support system integration into broader assemblies (e.g., liquid cooling loops, CDU components, heat exchangers, and low-voltage housings)



    Collaborate with manufacturing and industrialisation teams to ensure designs are optimised for cost, buildability, and reliability



    Support material selection for pressure and fluid compatibility (metals, elastomers, plastics)



    Contribute to DFMEA / PFMEA, design reviews, cost-down, and design optimisation activities

    * Oversee prototype builds and validation testing, including:

    Hydrostatic and burst pressure testing



    Leak integrity and sealing verification



    Flow and pressure-drop performance



    Mechanical endurance and fatigue



    Thermal stability testing in cooling applications



    Investigate issues from testing, manufacturing feedback, or field performance and implement corrective actions



    Ensure designs meet relevant standards and safety requirements (e.g., PED, ISO hydraulic standards, EN mechanical safety)

    What We're Looking For



    Degree in Mechanical Engineering, Hydraulics, Fluid Power Engineering (or equivalent experience)



    Strong experience in hydraulic system design and/or pressure-bearing mechanical components



    Proven capability designing sealing interfaces and pressure-retaining joints



    Knowledge of fluid dynamics, flow modelling, cavitation prevention, and pressure-drop analysis



    Strong CAD and engineering documentation skills (SolidWorks, Inventor, Solid Edge, ANSYS or similar)



    Experience with prototype testing, failure analysis, and validation activities



    Familiarity with engineering change processes and structured product development workflows

    Desirable



    Experience in data centre cooling, liquid cooling infrastructure, or HVAC fluid handling systems



    Experience working with electromechanical assemblies and low-voltage product environments

    What You'll Get



    The chance to work on advanced hydraulic and pressure-based mechanical products supporting next-generation cooling technologies



    End-to-end product development exposure from concept through to industrialisation



    A collaborative R&D environment with strong cross-functional support

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