Mechanical Design Engineer

Ajax Systems is an international technology company, the largest developer and manufacturer of Ajax security systems with smart home capabilities in Europe. It is an entire ecosystem consisting of 180 devices, mobile and desktop applications, and server infrastructure. Every year, we demonstrate exponential growth both in team size and the number of users worldwide. Currently, the company has more than 4,100 employees. Ajax sensors protect 4 million users in more than 187 countries around the world.

Required knowledge and skills:

🧩 Design and 3D modeling:

• SolidWorks (95% solid, 5% surface modeling), basic knowledge of sheet metal.
• Creating precise assemblies, mates, verifying tolerances, preparing models for transfer to molding production.
• Ability to break down complex projects into sub-assemblies, work with reference geometry and configurations.

🏭 DFM / DFA / manufacturing:

• Knowledge of mold operation: opening directions, gate locations, parting lines, risks of short shots/air pockets.
• Optimization of designs for scalability and cost reduction (minimizing parts, reducing weld seams, molding cycle).
• Experience collaborating with factories in Ukraine or China, understanding the mold life cycle, participating in changes after T1/T2.
• Basics of metalworking technologies: bending, stamping, laser cutting, milling for internal frames and auxiliary elements.

🧪 Testing and prototyping:

• Manual verification and assembly of prototypes, analysis of critical nodes.
• Detection and elimination of issues with sealing, clearances, and fitment.
• Ability to use measuring tools (calipers, micrometers, gauges).

🧠 Materials science and standards:

• Knowledge of the properties of ABS, PC, PC+ABS, PA+GF, TPE, TPU: shrinkage, impact strength, thermal stability, elasticity.
• Understanding how material behavior changes during production and operation (temperature, humidity, ultraviolet).
• Ability to balance price/quality/manufacturability when selecting materials.

⚙️ Functional elements:

• Development of fasteners, latches, guides, rubber seals, TPE/TPU elements, mounting slots.
• Designing interface elements: buttons, indicators, light guides, ports, ventilation holes.
• Understanding sealing methods (IP54–IP67), heat dissipation, battery compartment mounting.

📄 Documentation and production support:

• Generation of a full drawing package: 2D contours, tolerance tables, BOM, assembly specifications.
• Implementing changes based on prototyping results or production feedback.
• Participation in preparing technical descriptions for quality control, assembly instructions, controlling design documentation.

🌐 Communication and tools:

• Basic English (A2+) for technical documentation and communication with foreign partners.
• Experience working with PDM / ERP systems (preferably SolidWorks PDM).
• Independent problem-solving and analytical thinking: not just "redrawing a part," but finding the right solution.

Main tasks:

• Full design cycle of plastic housings and mechanical assemblies for consumer electronics.
• Development of DFM- and DFA-oriented solutions taking serial production into account (injection molding, assembly, sealing, maintainability).
• Interaction with hardware, embedded engineers, industrial designers, technologists, quality department, and production.
• Building ergonomic, intuitive designs that easily adapt to different operating environments.
• Preparation of documentation for transfer to production (2D drawings, specifications, technical requirements, 3D models for molds).
• Mold support and coordination of changes after the first shots (T0–T2), analysis of molding defects.
• Participation in testing and feedback from prototypes and production, implementing design changes.
• Controlling the engineering compliance of the finished product with expected technical parameters (rigidity, assembly, weight, IP protection).
• Supporting the product from concept to mass production, including analysis of cost and the impact of design decisions on the cost price.

We offer: 

• The opportunity to propose and implement your own ideas that have an impact on the product and production.
• Work in a motivated team and zero bullshit culture.
• Competitive salary.
• Medical insurance.
• Corporate English language classes.
• The opportunity to participate in the beta testing of Ajax security systems — receiving and testing new gadgets before their release.

Ajax Systems is a Ukrainian success story, a place of incredible strength and energy. Join us to make Made in Ukraine 🇺🇦 a synonym for reliability.