Muhammad U.

PCB problems become expensive after fabrication. A weak power architecture, missed return path, unsuitable component, or overlooked layout detail can cause unstable prototypes, failed testing, and another costly board revision.

I take ownership of PCB hardware from architecture and schematic design through multilayer layout, independent design review, board bring-up, debugging, DFM, and manufacturing release using Altium Designer and KiCad.

Clients have described my PCB reviews as “structured, honest and specific,” with findings that “went beyond the obvious checklist items.” On longer hardware engagements, clients have rehired me after I diagnosed unexpected testing problems and implemented reliable corrections.

What I take ownership of:
• Hardware architecture and system block diagrams
• Schematic capture and circuit design
• Component selection, sourcing, and lifecycle analysis
• Analog, digital, power, and mixed-signal electronics
• Multilayer PCB design, from 2 to 12+ layers
• High-speed routing and differential pairs
• Signal integrity and power integrity considerations
• Controlled impedance and PCB stack-up planning
• Grounding, return paths, EMI/EMC, and thermal management
• Rigid and rigid-flex PCB design
• ESP32, STM32, ARM Cortex, and Nordic nRF52 hardware
• BLE, Wi-Fi, LoRa, cellular, GNSS, NFC, CAN, USB, and RS485
• Battery charging and low-power electronics
• Obsolete-component replacement and PCB redesign
• Independent schematic and PCB layout reviews
• DFM, DFA, and production documentation

Independent PCB design review:
I review more than design-rule errors. My PCB reviews examine power distribution, return paths, component placement, interface implementation, grounding, protection, thermal risks, manufacturability, test access, and likely board bring-up problems. The result is a structured list of findings with practical corrections, priorities, and clear technical reasoning.

Board bring-up and debugging:
My responsibility does not end when the Gerber files are generated. I support controlled first power-up, power-rail verification, current measurements, clock and reset checks, communication-interface validation, sensor testing, fault isolation, and root-cause analysis. When testing exposes a design issue, I document the findings, correct the Altium or KiCad source files, and prepare the next verified board revision.