Hire the Best Semiconductor Specialists

Most embedded/PCB freelancers specialize in one lane. I've spent 35+ years moving across all of them — IC layout, custom PCB design, embedded firmware, and full-stack software — which means I can take a project from a rough idea through working hardware and the dashboard that controls it, without handing it between specialists. A sample of what that's looked like in practice: a custom industrial communication protocol supporting 1000+ addressable nodes, a cloud-synced clock rendered identically on hardware and web, a mesh-network vibration datalogger for landscaping equipment, sensory prosthetic devices (two U.S. patents came out of that work), and more one-off PCB/firmware jobs than I can list — metal detectors, load cell combiners, stepper drivers, servo hubs, and precision lab instrumentation with full touchscreen control. Core stack: Eagle CAD for schematics/PCB, PIC Assembly and Arduino for firmware, Python/Flask/JavaScript/MySQL for the software side, and the usual embedded comms protocols (I2C, SPI, CAN, RS-485, MQTT). If your project spans hardware and software and you don't want to manage three contractors to get there, let's talk.

Are you looking for a skilled PCB designer and electronics specialist to bring your ideas to life? With a deep passion for circuit design and hands-on experience in developing high-performance electronic systems, I can help you design, optimize, and troubleshoot PCBs for various applications. What I Offer: - Custom PCB Design – Schematic capture, multilayer PCB layouts, and high-speed routing - Circuit Design & Simulation – Analog/digital circuits, microcontrollers, and embedded systems - Prototyping & Testing – Ensuring functionality, signal integrity, and manufacturability - Software & Tools – Expertise in Altium Designer, KiCad, Eagle, Proteus, and MATLAB - Manufacturing Support – BOM generation, Gerber files, and design-for-manufacturing (DFM)

7 years at Intel as an Electronics Design Engineer, now independent — every Upwork project rated 5.0. Tier-1 semiconductor companies bring me in for overflow PCB layout; for startups, I'm the expert they can't hire full-time. I'm the engineer to call when a board is too complex, too fast, or too power-hungry to get wrong on the first spin — or when you need measurements you can actually trust. Not the cheapest bid; the one who gets it right. To date, each board I've designed has come up working the first time. "Within minutes it was obvious he understood the problem at a level I hadn't encountered before — he was already asking questions our own team hadn't thought to ask. They found several issues that would have been a nightmare to deal with after the fact ... the board went to manufacturer on time, and I actually felt good about it. What I appreciated most was that Ethan just owned it — the same attention to detail that caught those issues carried through the entire engagement." — Daniel L., Founder, VC-backed hardware startup · February 2026 Need one engineer to own your whole board, concept to debugged hardware? Or extra senior hands on an overflow layout? Either way, you get the same silicon-grade rigor. Through my firm, EGS Engineering, I cover the full range of electronics and PCB design — a broad base of everyday board work, with deep specialization in two areas: ▸ HIGH-COMPLEXITY COMPUTE PLATFORMS — high-speed, high-power, high-density boards for datacenter and AI hardware (CPUs, ASICs, SoCs, FPGAs), power delivery into the hundreds of amps, and silicon validation. ▸ PRECISION MEASUREMENT & TELEMETRY — trustworthy measurement chains from nanovolts to volts, modeled, calibrated, and lab-validated. ──────────────────────────────────── SPECIALTY 1 — HIGH-COMPLEXITY COMPUTE PLATFORMS The hardest class of digital hardware: high-speed, high-power, high-layer-count, high-density boards with thousands of components. • Full-board ownership around CPUs, ASICs, SoCs, FPGAs, and MCUs — architecture, schematic, layout, and bring-up • High-speed interfaces under real signal-integrity constraints: PCIe Gen4, DDR3L, LPDDR5, DRAM, ONFI/NAND, eMMC/SD, USB, HDMI, I2C, SPI, I3C, and custom buses • Up to 24-layer stackups owned end to end — signal integrity, power integrity, and DFM/DFA locked before release, so you don't burn a fab cycle and weeks of schedule on a respin. • Power Electronics — multiphase VRMs up to 12 phases and 360 A, and the board/package PDN around them, kept within spec at hundreds of amps: model extraction, PDN/PI simulation, regulator tuning, and validation against target-impedance and transient budgets. • SSD validation platforms exposing the controller, NAND/Optane media, rails, and PCIe — custom sockets, breakout/pathfinding, instrumentation, bring-up, debug, and firmware support. ──────────────────────────────────── SPECIALTY 2 — PRECISION MEASUREMENT & TELEMETRY Measurement you can stake a design decision on. I don't just drop in an ADC and hope for the best. I architect the entire measurement chain, model it, extract and ingest models, and design the calibration and validation so the numbers on the screen actually mean something. • Architected and led teams to build TWO mixed-signal measurement platforms (precision analog front ends + FPGAs) delivering accurate power and temperature telemetry for storage and memory devices • Front ends spanning nanovolts to volts and milliamps to hundreds of amps — architected, modeled, and lab-correlated so the reading is one you can defend in a design review, not one you have to take on faith. • Precision AFEs (INA / op-amp), ADCs, voltage references; temperature sensing via thermistors, RTDs, and BJTs; TEC control • Modeling and validation: SPICE, MATLAB/Simulink, Python — model extraction, lab correlation, Bode, load-step, calibration ──────────────────────────────────── Start small if you want to: send me your specs or invite me to your job and I'll give you an honest read on scope, risk, and whether I'm the right fit — that first conversation is on me. Need a deeper answer before you commit? I also offer paid scoping consultations — a written risk and architecture assessment you can act on. Either way, you'll know exactly where you stand before any real work begins.

▶️I am a hardware engineer specializing in power electronics and battery-powered IoT systems. I help clients turn hardware concepts into working systems, including DC-DC design, battery charging circuits, and PCB bring-up and debugging. ▶️My core expertise includes power electronics and embedded hardware design for low-power and battery-operated systems. I work extensively with DC-DC converters (buck, boost, and buck-boost), battery charging circuits, and power management design for IoT and portable devices. I also handle PCB review, hardware bring-up, and debugging of power-related issues such as instability, noise, and efficiency optimization. ▶️I focus on hands-on engineering work in battery-powered IoT devices, power electronics, and embedded hardware systems. My typical projects involve system-level design, PCB bring-up, debugging, and optimization of existing hardware. I can also support early-stage projects by helping refine hardware requirements when there is a clear intent to develop a working product. ▶️Based in Shenzhen, the global hardware hub, I can provide direct oversight for sourcing and PCBA manufacturing

I am a professional Embedded Engineer with over 10 years of experience in embedded systems design, covering both hardware and firmware/software development. I have also set up and led a full-service engineering team, delivering complete products from concept to production, including hardware design, embedded software, cloud integration, and, AI, mobile app development, product/industrial design. I specialize in wireless IoT devices, wearable/medical technology, and embedded firmware with a strong background in end-to-end product development and team leadership. What We Can Offer Firmware Development - Embedded software for IoT, wearables, medical, and consumer electronics - Driver development, RTOS integration, and low-power optimization - Connectivity stacks: BLE, Wi-Fi, NFC, LoRa, LTE, CAT-M1, NB-IoT - Secure OTA updates, device provisioning, and cloud integration Hardware Design - Custom PCB design with multiple layer and layout for high-reliability embedded systems - Power management & battery systems (BMS, energy optimization) - Prototyping, testing, and design-for-manufacturing (DFM) Product & Industrial Design - Mechanical design, 3D modeling, and enclosure development - Ergonomics and usability design for consumer and medical devices - Design-for-production (DFP) and certification support (CE, FCC, FDA-ready) AI & Data Processing - Edge AI/ML model deployment (Edge Impulse, TensorFlow Lite) - Predictive maintenance and anomaly detection for IoT/IIoT - Cloud-based AI integration with AWS/Azure/Google Cloud Mobile App & Cloud Integration - Cross-platform mobile apps (Android/iOS) - Secure Bluetooth, Wi-Fi, and cloud connectivity with devices - Web portal/dashboard development for monitoring and analytics

I transform your high-risk hardware concepts into stable, manufacturable products that work on the first spin. By combining advanced PCB design with my in-house assembly and testing lab, I eliminate the 3-week delay and technical uncertainty of traditional prototyping cycles. Services ✅Advanced Schematic Design: Hierarchical, well-documented circuit blueprints designed for clarity and debuggability. ✅Multilayer PCB Layout: Precision routing up to 12 layers with controlled impedance and length matching. ✅High-Speed Interfaces: DDR4, USB 3.1, HDMI, and PCIe layout following strict transmission line physics. ✅Power Electronics: DC-DC converter optimization (Buck/Boost), high-current pathing (up to 50A), and thermal dissipation. ✅Mixed-Signal Design: Protecting sensitive analog sensor data from high-speed digital noise via proper partitioning. ✅RF and Antenna Integration: BLE, Wi-Fi, and LoRa antenna matching and layout for maximum range. ✅Design for Manufacturability (DFM): Comprehensive review of footprints, solder mask, and drill tables to ensure high factory yields. ✅Hardware Design Review: Third-party analysis of your existing boards to find and fix stability or EMI issues. ✅Bill of Materials (BOM) Scrubbing: Optimizing for cost, lead time, and production volume. ✅In-House SMT Assembly: Small-batch production (1–100 units) on my professional pick-and-place line. ✅Bring-Up and Validation: Power rail verification, signal probing, and thermal mapping of the first physical prototypes. ✅Test Fixture Design: Custom "Bed-of-Nails" jigs for your production line. ✅Legacy PCB Reverse Engineering: Modernizing obsolete boards with currently available components. Specializations 🎯High-Speed Digital Layout (DDR4, USB 3.x, PCIe) 🎯Power Integrity & PDN Optimization 🎯EMI/EMC Aware Design & Mitigation 🎯Design for Manufacturability (DFM) 🎯Multilayer PCB Stackup Architecture 🎯Precision Analog & Mixed-Signal 🎯IoT & Ultra-Low Power Wearables 🎯Rigid-Flex & Flexible PCB Design 🎯Thermal Management & Heat Dissipation 🎯Small-Batch PCBA Manufacturing Process ⚙️Requirement & Risk Assessment: I begin by analyzing your technical specifications and identifying potential "deal-breakers" in EMI, power, or component lead times. ⚙️Architecture & Schematic Capture: I build a logical, hierarchical schematic and perform initial BOM scrubbing to ensure all parts are in production. ⚙️Stackup & Layout Engineering: I design the layer stackup for impedance control and route all signals using simulation-led SI/PI best practices. ⚙️DFM/DFT Verification: I run a comprehensive audit against 100+ manufacturing rules to ensure your board is ready for the assembly line. ⚙️Prototyping & Assembly: I manufacture the first physical units in my in-house lab, allowing for immediate physical validation. ⚙️Bring-Up & Bench Testing: I power on the boards, verify every voltage rail, and probe critical signals to ensure they meet your specs. ⚙️Handover & Support: You receive the full source files, manufacturing pack, and a "Bring-up Guide" to help your firmware team get started immediately. Tools/Stack 🔧EDA: Altium Designer (Primary), KiCad, EasyEDA, LT Spice, Solidworks, Onshape 🔧Lab: 4-Channel 500MHz Oscilloscope, Spectrum Analyzer, Logic Analyzer, Thermal Camera, SMT Pick-and-Place line Great fit if… 🤝 You are a startup needing a partner who can build working hardware, not just deliver files. 🤝 You have a high-complexity design (DDR, USB, HDMI) that requires precision layout. 🤝 You need a "turnkey" solution from design through small-batch production. 🤝 You have an existing design that is failing EMI/EMC or has stability issues.