Ajax Systems

European security systems maker, smart homes

Senior/Lead Hardware Engineer

Board & Electronics Design +1Confirmed live in the last 24 hours

Full-timeNo salary listed

About the Job

Requirements

Expert-level calculation of circuit elements and high-fidelity simulations of device behavior.
Professional proficiency in Altium Designer.
A proven track record of designing for LVD/EMC compliance and mass manufacturing using design for manufacturing and design for test practices.
Deep expertise in designing battery-powered and mains-powered devices operating at 85–265 VAC.
Experience preparing comprehensive production documentation, including bill of materials management, Gerber files, and assembly drawings, using Git for version control.
Fluent English for technical documentation and international collaboration.

Responsibilities

Develop schematic solutions and printed circuit board layouts for new devices, ensuring high reliability and scalability.
Identify opportunities for cost reduction and performance enhancement through component unification and architectural changes.
Lead complex hardware projects from initial concept through mass production at volumes of 10,000 or more units per month, mitigating technical risks.
Consult firmware and supply chain teams as a subject matter expert to optimize the hardware-software interface and manufacturing yield.
Lead prototype bring-up, debug complex issues, and define testing protocols for design validation.

Desired Qualifications

Experience with managed libraries and 3D modeling in Altium Designer.
Direct experience working with vendors and manufacturers for high-volume production.
Advanced understanding of signal integrity and power integrity, including S-parameters, power distribution network impedance modeling, and time-domain reflectometry measurements.
Ability to write or review embedded software in C or C++ for STM32 to support deep-level debugging and hardware-software co-design.
Experience guiding products through global certifications, including UL, CE, and RED, beyond basic compliance.

Ajax Systems is expending and is looking for a Senior/Lead Hardware Engineer to strengthen our team in China.

Ajax Systems is an international tech company and the largest manufacturer of security systems in Europe, with over 4.5 million end users and 330K PRO users in more than 180 countries worldwide. The company offers end-to-end solutions for protecting homes and businesses of any scale. To date, the Ajax product portfolio includes 280 devices for intrusion protection, video surveillance, fire and life safety, and comfort and automation.

As a Senior Hardware Engineer, you will not only design circuits but also serve as a technical cornerstone for our R&D in China.
We are looking for an expert who brings strategic value: someone who can oversee complex system architectures, consult on cross-departmental optimizations, and mentor the team on high-performance design methodologies. You will be the bridge between innovative concepts and mass-scale manufacturing.

Key Responsibilities

Architecture & Design: Develop sophisticated schematic solutions and PCB layouts for new Ajax devices, ensuring high reliability and scalability.
Strategic Optimization: Proactively identify opportunities for cost reduction and performance enhancement through component unification and innovative architectural shifts.
Project Oversight: Lead complex hardware projects from initial concept through to mass production (10,000+ units/month), ensuring all technical risks are mitigated.
Cross-Functional Consultation: Act as a subject matter expert for the firmware and supply chain teams to optimize the hardware-software interface and manufacturing yield.
Prototype Lifecycle: Lead the “bring-up” process, debugging complex issues and defining rigorous testing protocols for design validation.

Requirements

Advanced Circuit Design: Expert-level calculation of circuit elements and high-fidelity simulations of device behavior.
EDA Mastery: Professional proficiency in Altium Designer (experience with managed libraries and 3D modeling is preferred).
Design for Excellence (DfX): Proven track record of designing for LVD/EMC compliance and mass manufacturing (DFM/DFT).
Power Management: Deep expertise in designing both battery-powered and mains-powered (85–265 VAC) devices.
Full Lifecycle Ownership: Experience preparing comprehensive production documentation (BOM management, Gerber files, assembly drawings) using Git for version control.
Communication: Fluent English is required for technical documentation and international collaboration.

Preferred Qualifications

Supply Chain Leadership: Direct experience working with vendors and manufacturers for high-volume production.
High-Speed Design: Advanced understanding of Signal Integrity (SI) and Power Integrity (PI). Experience with S-parameters, PDN impedance modeling, and TDR measurements.
System-Level Thinking: Ability to write or review embedded software (C/C++, STM32) to facilitate deep-level debugging and hardware-software co-design.
Regulatory Mentorship: Experience guiding products through global certifications (UL, CE, RED), beyond basic compliance.

About the Company

Ajax Systems

European security systems maker, smart homes

Ajax Systems designs and manufactures security systems for homes and businesses, focusing on products that integrate smart home capabilities. The company produces security hardware such as sensors and alarms that can work together as a system, usually managed through a centralized platform. Distinguishing factors include its European manufacturing base and specialization in security systems with smart home integration, catering to customers who want connected and remotely manageable protection. The goal is to provide reliable security solutions that combine traditional protection with smart, networked features for easier monitoring and control.

Company size: 1,001-5,000
Company stage: Late Stage VC
Total funding: $11M
Headquarters: Kyiv, Ukraine
Founded: 2011

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