Mechanical Engineer (CH) position at Ajax Systems.| China

_2025-12-29 bot

Ajax Systems Mechanical Engineer (CH)

Experience: General

Pattern: Full-time

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Shenzhen / Don..........China

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<p>Ajax Systems is looking for an experienced <b>Mechanical Engineer</b> to join our team.</p><p><br></p><p>Ajax Systems is a developer and manufacturer of advanced security systems with smart home capabilities. We are a full-cycle product company from idea and engineering to mass production. Our portfolio includes 70+ devices that protect properties from intrusion, fire, and flooding, while also enabling smart control of electrical appliances.</p><p><br></p><p>Today, Ajax Systems protects over 2 million users in 169 countries worldwide and has received Europe’s highest security awards. We are proud to be a Ukrainian success story, a company driven by innovation, resilience, and strong engineering culture.</p>\n<p></p><p><br></p><b> Key Tasks:</b><ul><li>Complete lifecycle design of plastic enclosures and mechanical assemblies for consumer electronics.</li><li>Development of DFM- and DFH-oriented solutions considering mass production processes (plastic injection molding, assembly, sealing, serviceability).</li><li>Collaboration with hardware and embedded engineers, industrial designers, technologists, quality control, and manufacturing departments.</li><li>Design of ergonomic, intuitive solutions adaptable to different operating environments.</li><li>Preparation of production transfer documentation (2D drawings, specifications, technical requirements, 3D models for molds).</li><li>Support of mold development and approval of modifications after initial mold trials (T0–T2), including defect analysis.</li><li>Participation in testing and feedback from prototypes and production, incorporating design improvements.</li><li>Verification of engineering compliance of the finished product with expected technical parameters (stiffness, assembly, weight, IP protection).</li><li>Oversight of the product lifecycle from concept to mass production, including cost analysis and assessment of the impact of design decisions on production costs.</li><li>Communication with Chinese factories: technical specifications, drawing reviews, change control, feedback on prototypes and production samples.</li><li>Assessment of manufacturing risks in China: equipment limitations, mold quality, shrinkage, production tolerances, and the influence of packaging and logistics on design.</li><li>Inspection of samples from China: defect analysis (shrinkage, warping, poor casting), initial product assembly, and reporting with recommendations.</li><li>Consideration of potential scaling difficulties in China: timeline tracking, mold duplication, and price optimization.</li><li>Continuous communication via email, video calls, document comments (in English), and participation in editing specifications based on feedback from the Chinese side.</li></ul><p><br></p><b>Technical Knowledge and Skills:</b><div><b>🧩 3D Modeling & Design:</b></div><ul><li>SolidWorks (95% solid modeling, 5% surface modeling), basic sheet metal modeling knowledge.</li><li>Creation of precise assemblies, constraints, tolerance verification, and preparation of models for molding production.</li><li>Ability to break down complex projects into sub-units, using reference geometry and configurations.</li></ul><div><b>🏭 DFM / DFA / Manufacturing:</b></div><ul><li>Knowledge of mold design: opening directions, gating points, parting lines, risks of short shots/air pockets.</li><li>Optimization for scalability and cost reduction (minimize part count, reduce weld lines, shorten cycle time).</li><li>Experience working with factories in Ukraine and China; understanding of the mold lifecycle; participation in modifications after T1/T2.</li><li>Basics of metal processing technologies: bending, stamping, laser cutting, milling for internal frames and auxiliary parts.</li><li>Understanding of Chinese manufacturers’ practices: interpretation of drawings, overlooked details, confirmation processes.</li><li>Understanding of the Chinese production structure: project managers, engineers, suppliers.</li><li>Active participation in mold development discussions: steel selection, cost estimation, gating points, parting lines.</li><li>Familiarity with typical Chinese documentation formats: PDFs, STEP files, Excel specifications, compressed archives, WeTransfer/Alibaba Cloud.</li></ul><div><b>🧪 Testing & Prototyping:</b></div><ul><li>Manual inspection, assembly, and analysis of critical nodes.</li><li>Identifying and resolving sealing, play, and fit issues.</li><li>Skilled in the use of measuring tools: calipers, micrometers, gauges, etc.</li></ul><div><b>🧠 Materials Science & Standards:</b></div><ul><li>Properties of ABS, PC, PC+ABS, PA+GF, TPE, and TPU: shrinkage, impact strength, heat resistance, and elasticity.</li><li>Understanding material behavior during production and operation (temperature, humidity, UV).</li><li>Balancing cost, quality, and manufacturability when selecting materials.</li></ul><div><b>⚙️ Functional Elements:</b></div><ul><li>Development of fasteners, clips, guides, seals, TPE/TPU elements, and mounting slots.</li><li>Design of interface elements: buttons, indicators, light guides, ports, and ventilation openings.</li><li>Knowledge of sealing methods and IP protection standards (IP54–IP67), heat dissipation, and battery compartment design.</li><li>Considering Chinese factory constraints: wall thickness, micro gaps, welding, and assembly limitations.</li><li>Designing for high repairability and ease of assembly in outsourced Chinese facilities.</li></ul><div><b>📄 Documentation & Production Support:</b></div><ul><li>Generation of complete documentation bundles: 2D outlines, tolerance tables, BOMs, assembly specifications.</li><li>Implementation of changes based on prototype or production feedback.</li><li>Participation in preparing technical descriptions for QC, assembly instructions, and design documentation control.</li></ul><div><b>🌐 Communication & Tools:</b></div><ul><li>English B2+ level – oral and written technical communication with Chinese suppliers.</li><li>Experience in communication with Chinese engineers, managers, and production teams (via Alibaba, WeChat, email, video calls).</li><li>Knowledge of Chinese business communication nuances: importance of confirmations, repetitions, and visual examples.</li><li>Use of SolidWorks PDM, Excel, Google Docs, Asana/Trello/Notion for project management.</li></ul><p><br></p><p></p>\n

Mechanical Engineer (CH) job opportunity at Ajax Systems.

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