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Jiyoung P.
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Jiyoung P.

Production-ready Embedded System Design - ESP32, ESP8266, STM32

⚡ From prototype to production-ready PCB — fast, clean, and ready to order. 🏃‍♀️ Whether you're validating a concept on a breadboard or shipping your first production run, I bridge that gap. Send me your idea. I'll tell you exactly what it takes to build it. I design embedded hardware that goes straight to manufacturing. You get files that upload to JLCPCB, and assembled boards show up at your door — no sourcing headaches, no manual soldering. 🔧 What I deliver: → Schematic + PCB layout in KiCad → Gerber, BOM (LCSC part numbers), pick-and-place — JLCPCB turnkey-ready → Firmware when needed (ESP-IDF, Arduino, STM32 HAL) → Clean documentation so your next engineer can pick up where I left off 🛠️ Core stack: → MCUs: ESP32, ESP8266, STM32, RP2040 → Connectivity: WiFi, BLE, LTE (SIM modules) → Power: Buck converters, LDOs, battery charging, protection circuits → Sensors: Temperature, humidity, IMU, current sensing, analog front-ends

🇰🇷Pyeongtaek, South Korea$30/hr100% JSS5.00 (6)Since Jun 2025

Earnings and projects

MRR
$196

Last 6 months ÷ 6

World#114,178 / 412k
🇰🇷Country#194 / 676
Revenue, last 30 days
$0

Last 6 months: $1.2k

Total earnings
$2.1k

Billed in all: $2.1k

World#330,521 / 412k
🇰🇷Country#523 / 676
Per project
$296

$392 in the last 6 months

World#232,167 / 412k
🇰🇷Country#372 / 676
Projects, last 6 months
3

Across 5 contracts

100% fixed0% hourly
World#66,479 / 412k
🇰🇷Country#114 / 676
Projects in all
7

Across 9 contracts

78% fixed22% hourly
World#236,188 / 412k
🇰🇷Country#374 / 676

Earnings, last 30 days

$2.1kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$2,075$2,100$2,125$2,150Oct 8Oct 23Nov 7

Skill rankings: Top 24% in Digital Signal Processing

Ranked by MRR among everyone on Upwork with the skill.

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  3. #60Digital Signal Processing254 freelancers · 🇰🇷 #1Top 24%
  4. #172Raspberry Pi623 freelancers · 🇰🇷 #3Top 28%
  5. #215STM32545 freelancers · 🇰🇷 #2Top 39%
  6. #250Arduino1,007 freelancers · 🇰🇷 #2Top 25%
  7. #297ESP32780 freelancers · 🇰🇷 #2Top 38%