AI · Computer vision · Embedded systems

Patcharadanai SombatsatienCheer · 陈寅甲

I build software where models meet hardware: deep learning for image segmentation, control software for telescope instruments, and test automation for RF production lines.

PythonC++VHDL Deep learningComputer visionPyVISA instrument control
Get in touch GitHub
Portrait of Patcharadanai Sombatsatien
Embedded Firmware Engineer · AirGradient
Founder · CeroSoft
M.Sc. · Xi'an Jiaotong University
Former engineer · NARIT and Hana
3 yrs 5 mosIndustry and research experience
5Co-authored publications
3.63GPA, M.Sc. Computer Science
3.78GPA, B.Eng. Electrical Engineering
Now

Building CeroSoft

A software studio I founded to turn messy, manual workflows into simple systems that small businesses can actually run.

CeroSoft logo

CeroSoft

cerosoft.net

From zero to solution. CeroSoft starts from the business problem, not the technology, and builds software for SMEs, condominiums and local service businesses that still run on Excel, chat groups and paper.

Custom softwareBusiness automationWeb solutionsSystem integrationSupport and maintenance
Flagship product · live at Punna Residence 5

CondoMate: condominium management system

One system for residents and the management office: repair requests, parcel tracking, shared-space booking, announcements, finance and reports.

  • Node.js server and API with sign-in, role-based access and file uploads
  • Two deployment modes: SQLite on-premises or PostgreSQL online on Vercel
  • Installable web app for residents, with barcode scanning for parcels
  • Backup and restore tooling, plus Playwright end-to-end tests

Company website

  • Bilingual Thai/English site built with React 19, TypeScript and Vite
  • Hosted on Vercel with Cloudflare DNS; contact form sent through a serverless function and Resend
CondoMate management console showing the building overview CondoMate sign-in choice between resident and management CondoMate resident home screen
CondoMate management console and resident app (Punna Residence 5)
Selected work

Projects

From a master's thesis in open-vocabulary segmentation to instrument software at the National Astronomical Research Institute of Thailand.

Master's thesis · Xi'an Jiaotong University · 2024–2026

Training-free domain adaptation via LoRA fusion

Parameter-Efficient Training-Free Domain Adaptation via LoRA Fusion for Open-Vocabulary Segmentation. Combines heterogeneous pre-training, parameter-efficient adaptation and similarity-driven adapter composition to keep zero-shot generalisation while improving cross-domain stability and computational efficiency.

  1. 1
    Similarity-guided LoRA selectionPick the adapters closest to the input domain
  2. 2
    Dynamic fusionWeight and merge them at inference time
  3. 3
    Segmentation outputOpen-vocabulary masks with no extra training
Segmentation results on an urban street scene Segmentation results on a tree-lined road scene
RGBGround truthZero-shotProposed
Optical bench with nano-piezo actuator Motion control software window
NARIT · EvWaCo · 2023–2024

Focal-plane mask control

For the Evanescent Wave Coronagraph: linking nano-piezo actuator position to the measured FWHM of the focal-plane mask.

  • Control software for the actuator: COM-port selection, motion control, saved configurations
  • Live FWHM measurement tied to actuator position
Deformable mirror surface model Closed-loop control diagram with wavefront sensor, deformable mirror and leaky integrator
NARIT · EvWaCo · 2023–2024

Adaptive-optics closed loop

Calibration and characterisation of the TAO adaptive-optics system, then closed-loop experiments.

  • Shack–Hartmann wavefront sensor and deformable mirror calibration
  • Interaction-matrix measurement and leaky-integrator control loop
LiDAR station firing a green laser at night Atmospheric LiDAR web dashboard
NARIT · 2023–2024

Atmospheric LiDAR and dashboard

A Mie-scattering LiDAR for observing atmospheric aerosols, with a web dashboard for instrument status and processed profiles.

  • Range-correction data processing
  • Laser power control
  • Dashboard showing live readings and LiDAR profiles
UV-to-visible spectrograph project poster Solar spectrum before and after distortion correction
NARIT · 2023–2024

UV-to-visible spectrograph

A Czerny–Turner spectrograph covering 350–700 nm at R = 500–3500, prototyped in 3D-printed PLA and nylon.

  • Data-cube visualisation
  • Distortion correction to reveal solar features
Hana Microelectronics × Keysight Technologies · 2021–2023

Four test-line automation projects

Each one replaced a manual step on the RF production line with a small program.

Pie chart of station run, idle and setup time
Weekly test-station updateStation utilisation sent to the team automatically through LINE Notify.
Diagram: instruments to program to database and e-mail
Where is my instrument?Polls test instruments, logs them to a database and sends e-mail alerts.
Diagram: Orion server to program to Excel
Orion automatic WIPWork-in-progress data pulled from the Orion server into Excel.
Diagram: program controlling a spectrum analyser through PyVISA
Semi-automatic spurious testA manual spectrum-analyser test converted to Python and PyVISA.
Demo

The weekly update arriving in the team's LINE group

Station status and equipment summaries are generated and pushed each week, so nobody compiles the report by hand.

B.Eng. senior project · Chiang Mai University · 2020

Vehicle counting at road intersections

Counts the vehicles on each route through an intersection from video, giving the primary data for studying congestion and planning traffic management.

  • Image processing on intersection video
  • Vehicle detection, tracking and per-route counting
Electric Dust Killer control board with TFT display Drainage team at work
Community engineering · Chiang Mai University

Community engineering projects

Electric Dust Killer: software

  • Microcontroller firmware for the control unit
  • Real-time readout of two PM2.5 sensors on a TFT display
  • Threshold logic that switches the dust-removal system on and off

Mae Chan flood monitoring

  • Helped develop a web-based system to track flood conditions for the community in Mae Chan, Chiang Rai
Experience

Where I've worked

  1. AirGradient logoNov 2026 – PresentAirGradient

    Embedded Firmware Engineer

    AirGradient

    Firmware for air-quality monitoring hardware.

    Embedded firmwareAir-quality sensing
  2. CeroSoft logoAug 2026 – PresentCeroSoft

    Founder and Software Developer

    CeroSoft · Thailand

    Designing and building business software end to end, from requirements to deployment and support. Flagship product: CondoMate, a condominium management system in live use.

    Node.jsPostgreSQL · SQLiteReact · TypeScriptVercel
  3. NARIT logoFeb 2023 – Aug 20241 yr 8 mos

    Embedded Software Engineer

    National Astronomical Research Institute of Thailand (NARIT) · Center for Optics and Photonics

    Instrument control and data processing for astronomical and atmospheric instruments: the EvWaCo coronagraph's focal-plane mask and adaptive optics, an atmospheric LiDAR and a UV-to-visible spectrograph.

    Instrument controlAdaptive opticsSignal processingDashboards
  4. Hana Microelectronics logoMay 2021 – Jan 20231 yr 9 mos

    Electrical Test Engineer

    Hana Microelectronics × Keysight Technologies · OP3 RF

    Troubleshooting high-frequency motherboards, controlling the test production line and running yield-improvement projects, including four automation tools.

    RF testYield improvementPython · PyVISAProduction cost reduction
Research

Publications

Co-author on five papers from my work at NARIT.

  1. 2025
    Detection of atmospheric aerosol layer using Mie LiDAR systemIEEJ Workshop Materials, DEI 2025
  2. 2024
    Preliminary closed-loop performance of the adaptive optics for the Evanescent Wave Coronagraph prototypeAdaptive Optics Systems IX, Proc. SPIE 13097
  3. 2024
    Completed optical design and performance analysis of the evanescent wave coronagraph prototype for the Thai National TelescopeGround-based and Airborne Instrumentation for Astronomy X, Proc. SPIE 13096
  4. 2024
    First results of the non-common path aberration correction in the Evanescent Wave Coronagraph testbedAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation, Proc. SPIE
  5. 2024
    Optimization of flexible opto-mechanical mounts design in metallic mirror for space-based telescope using finite element analysisAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation, Proc. SPIE
Education

Study

Scholarship recipients group photo
2024 – 2026 · graduated July 2026

M.Sc. Computer Science and Technology

Xi'an Jiaotong University
Focus
Artificial intelligence and computer vision
Key areas
Deep learning, parameter-efficient techniques
GPA
3.63
Full scholarship from the Information Technology Foundation under the Initiative of Her Royal Highness Princess Maha Chakri Sirindhorn.
2017 – 2021 · Telecommunications

B.Eng. Electrical Engineering

Chiang Mai University
Foundation
Circuit theory, frequency modulation, digital signal processing
GPA
3.78
Awards and activities
  • 2021Winner (software team member), True 5G Robotic Bootcamp
  • 2019Outstanding Engineering Student Scholarship, Chiang Mai University
  • 2019Winner, Digital Design Camp × Chiang Mai University
  • 2019Community service project with the University of Michigan
  • 2014Silver Award, International Mathematics Competition (Chiang Mai)
  • 2011Gold Award, Mathematics Academic Competition (Chiang Mai)
True 5G Robotic Bootcamp team
True 5G Robotic Bootcamp
Digital Design Camp award
Digital Design Camp
Receiving the engineering scholarship
Engineering scholarship
Community service project with the University of Michigan
Service with U. of Michigan
Contact

Let's talk

Open to roles in AI, computer vision and embedded software. I'm happy to walk through any of these projects in detail.

cheer3142@gmail.com GitHub