# Senior/Lead Hardware Engineer

**Company**: Ajax Systems
**Location**: Shenzhen
**Work arrangement**: hybrid
**Experience**: senior
**Job type**: full-time
**Category**: Engineering
**Industry**: Technology

**Apply**: https://jobs.lever.co/ajax/dbbcf9be-44c5-4309-aa1d-be2637a8e916?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_35137d7d-0e7

## Description

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

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

- Develop sophisticated schematic solutions and PCB layouts for new Ajax devices, ensuring high reliability and scalability.

- Proactively identify opportunities for cost reduction and performance enhancement through component unification and innovative architectural shifts.

- Lead complex hardware projects from initial concept through to mass production (10,000+ units/month), ensuring all technical risks are mitigated.

- Act as a subject matter expert for the firmware and supply chain teams to optimize the hardware-software interface and manufacturing yield.

- Lead the “bring-up” process, debugging complex issues and defining rigorous testing protocols for design validation.

## Requirements

- Expert-level calculation of circuit elements and high-fidelity simulations of device behavior.

- Professional proficiency in Altium Designer (experience with managed libraries and 3D modeling is preferred).

- Proven track record of designing for LVD/EMC compliance and mass manufacturing (DFM/DFT).

- Deep expertise in designing both battery-powered and mains-powered (85–265 VAC) devices.

- Experience preparing comprehensive production documentation (BOM management, Gerber files, assembly drawings) using Git for version control.

- Fluent English is required for technical documentation and international collaboration.

## Preferred Qualifications

- Direct experience working with vendors and manufacturers for high-volume production.

- Advanced understanding of Signal Integrity (SI) and Power Integrity (PI). Experience with S-parameters, PDN impedance modeling, and TDR measurements.

- Ability to write or review embedded software (C/C++, STM32) to facilitate deep-level debugging and hardware-software co-design.

- Experience guiding products through global certifications (UL, CE, RED), beyond basic compliance.

## Skills

### Required
- Altium Designer
- Circuit Design
- Power Management
- Git
- English

### Nice to have
- Supply Chain Leadership
- High-Speed Design
- System-Level Thinking
- Regulatory Mentorship

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