Hardware & Firmware Engineering
Production-ready PCBs and firmware for IoT and embedded systems — from schematic to shipped device.
hello@sivakov.tech- 10+ Years Experience
- 50+ Projects Completed
- 100% Job Success
- 5.0 Upwork Rating
Services
End-to-end embedded systems engineering — hardware, firmware, and everything it takes to get a device into the real world.
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PCB Design
KiCad designs from 2 to 6 layers — production-ready files for JLCPCB, with components sourced and validated.
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Firmware Development
Production firmware in ESP-IDF, Zephyr, and bare metal C/C++ across ESP32, nRF52, and STM32.
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Schematic & Layout Review
Independent review of your schematic and layout before fab — written report with specific, actionable fixes.
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Hardware Bring-up
First-article validation on real hardware — I order, power up, and verify the design works before you commit to production.
Learn more about Hardware Bring-up -
Enclosure Design
FDM-printable enclosures designed around your real PCB in Fusion 360 — parametric, print-tested, fits first time.
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Consulting
Technical and project-level advice — feasibility, architecture, team scoping, timelines, and budgets.
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Full-Stack Embedded Engineering
I started in electronics on the manufacturing floor and moved into software, working across web, embedded, and backend systems — first in outsourcing, then leading teams at a startup and at one of the largest tech companies in Europe. Alongside that, I've consulted startups on architecture, hiring, and scaling.
After years of splitting time between corporate work and freelance, I decided to go independent and focus on what I enjoy most — embedded systems and microelectronics. I work directly with clients on freelance projects and consulting engagements.
- Fixed-price projects with clear deliverables
- Direct communication, no middlemen
- PCB design and firmware under one roof
What clients say
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“Nikita provided a very thoughtful and professional technical consultation. He did not just answer the questions mechanically, but looked at the project from both an engineering and product viability perspective. What I appreciated most was that Nikita was not trying to simply sell development work. He helped me think more realistically about the project, challenged weak assumptions, and suggested a safer step-by-step approach before investing in a full prototype. Communication was clear, detailed, and professional. I would gladly work with Nikita again on the next technical stage.”
Ilnur S.
Los Angeles, US
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“Nikita was fantastic to work with. He took my concept for an ESP32-C3 + WS2812B PCB and turned it into a solid, production-ready design. Super responsive, knowledgeable, and easy to communicate with. Everything worked as intended — highly recommend and will definitely use him again.”
Kyle H.
Surrey, CA
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“Nikita delivered a professional 4-layer PCB design for my IoT product (ESP32 + A7670E LTE module with multiple analog sensors). Deliverables were excellent: clean DRC report, complete JLCPCB production files (Gerbers, BOM with LCSC codes, CPL), bonus LTspice simulations well beyond the agreed scope, and thoughtful component placement. Communication was excellent throughout — detailed review questions were answered with annotated renders and datasheets. Would absolutely hire again. Highly recommended for anyone needing a serious PCB design done right the first time.”
Liran G.
Mivtza Petah Tikva, IL
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“Nikita did an excellent job on this project. Communication was fast and clear, and all answers were on point. He not only delivered the requested MVP firmware for the ESP32 but also helped with additional related tasks. Highly professional and reliable — I would definitely work with him again.”
Viktor M.
Rottenburg, DE
- All reviews
Recent Work
A selection of embedded hardware and firmware projects.
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IoT Boiler Monitor with LTE and Battery Backup
ESP32 + LTE monitoring board with battery management, temperature, current, and leak detection.
- PCB Design
- ESP32
- LTE
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Retrofit Smart Relay for Analog-Sensor Appliances
Matter/Thread relay module that connects legacy appliances to a smart home network — no internal modifications required.
- PCB Design
- ESP32-H2
- KiCad
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Electronic Shooting Target with 48× WS2812B LED Ring
Custom hexagonal 2-layer PCB with LED hit feedback and dual piezo detection — cost-optimized for production.
- PCB Design
- ESP32-C3
- KiCad
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AC/DC Flyback Power Supply — Prototyping Bench
Intentionally oversized isolated flyback converter built for easy probing and component characterization.
- Power Electronics
- KiCad
- Circuit Design
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ESP32-C3 DevKit with 500mA LDO, Ideal Diode and External Crystal
Compact ESP32-C3 dev board with external crystal, 500mA LDO, and ideal diode for direct 3.3V power — THT pins, USB-C, chip antenna.
- PCB Design
- ESP32
- RF Design
- All projects
Have a Device to Build?
Describe your project and I'll get back to you with a timeline and fixed price.