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Pham Doan Dang Khoa

PROFESSIONAL SUMMARY

Information Technology Engineer (PTIT) with a deep focus on Research & Development (R&D) of comprehensive Robotics systems. Specialist in designing and operating multi-terrain UGV (Unmanned Ground Vehicle) solutions, integrating low-latency WebRTC transmission technology over 4G/5G and Wi-Fi Mesh infrastructure. With strong systems thinking and a solid Full-stack foundation, I am capable of building highly scalable Cloud Robotics SaaS platforms — seamlessly connecting embedded control circuits, media pipeline processing, and centralized cloud management systems.

FEATURED R&D PROJECTS

Crawlspace Inspection Robot (UGV for Confined Space Survey) Tobor Technology LLC
  • Researched and developed from scratch a 4-wheel UGV system for the U.S. market, purpose-built for Inspectors surveying confined spaces (crawlspaces), featuring integrated 2D mapping, measurement, and real-time thermal video streaming.
  • EasyMesh Wi-Fi: Deployed a Wi-Fi Mesh network system enabling the robot to maintain a stable connection and seamless roaming when navigating large areas or environments with multiple obstacles.
  • Control System: Raspberry Pi 5 running embedded Linux, optimized for multi-threaded processing between the control board and motor drivers, ensuring immediate response under complex terrain conditions.
  • Web-based Controller: A browser-based control application, fully compatible with Desktop/Laptop/Tablet/Mobile — no app installation required.
  • Low-latency Streaming: Combined Python (Flask) + WebSocket for control commands and WebRTC for video streaming from IP Camera/Thermal Camera, optimizing bandwidth and achieving ultra-low image latency.
  • 2D Mapping (SLAM): Lidar S2 + SLAM algorithm to scan and reconstruct a 2D floor map as the robot moves; supports direct measurement of dimensions and distances on the map.
  • Thermal Camera & Laser Distance: Simultaneously integrated a thermal sensor and laser distance sensor to detect thermal leaks and measure structural dimensions inside crawlspaces.
  • HMI 3D Dashboard: A 3D display interface built with Three.js, allowing users to visually monitor sensor data and robot status in the most intuitive way.
Raspberry Pi 5 EasyMesh Wi-Fi WebRTC WebSocket Python SLAM Lidar Thermal Camera Laser Distance Three.js Embedded Linux
View Project

https://www.youtube.com/playlist?list=PLhuHErN4WK6IPeUaio0vSDmVToWTRZC4A
Remote Robot Control over Mobile Network Infrastructure (4G/5G Teleoperation) Tobor Technology LLC
  • Researched and implemented an unlimited-range robot control system over mobile networks, focused on optimizing transmission latency.
  • Universal Connectivity: Established a secure and stable data channel over 4G/5G networks, enabling robot control from anywhere via the Internet.
  • Latency Optimization: Conducted in-depth research on transmission protocols to achieve real-time camera streaming with ultra-low latency (<200ms), meeting instant-response requirements for remote operation.
  • Python Backend System: Managed high-volume data flows from sensors and video smoothly over Cloud/Internet infrastructure.
4G/5G Python WebRTC Cloud Infrastructure Low-latency Streaming
View Project

https://www.youtube.com/playlist?list=PLhuHErN4WK6LntAXMrTuMVxWMtCIUbTTG
Cloud Robotics & Centralized Robot Management Platform (SaaS Platform) Tobor Technology LLC
  • Built a remote robot control solution over mobile network infrastructure (4G/5G), enabling multi-device management, user access control, and robot control-as-a-service on a cloud platform.
  • GStreamer & MediaMTX: Set up an optimized video processing pipeline on the Robot using GStreamer (leveraging hardware acceleration); MediaMTX acts as an Edge Gateway to manage and transcode internal camera protocols.
  • WHIP Protocol: Standardized video stream publishing from MediaMTX to LiveKit Server via the WHIP standard, bypassing NAT/Firewall on 4G/5G networks while maintaining ultra-low latency (<200ms).
  • LiveKit SFU Architecture: Deployed LiveKit as the central data orchestration hub, ensuring high-quality video streaming and stable control commands under fluctuating bandwidth conditions.
  • Laravel SaaS Dashboard: A centralized control and management dashboard, optimized for end-user experience.
  • User & Device Onboarding: Account registration, device identity, and new Robot enrollment into the system via a secure API.
  • Role Hierarchy & Permissions: Strict permission management for Admin / Manager / Operator roles, with separate control over robot operation rights and camera monitoring rights.
  • Cloud Leasing Service: A business-ready scalable architecture for leasing cloud-based robot control infrastructure, optimizing operational costs for customers.
GStreamer MediaMTX WHIP Protocol LiveKit SFU Laravel PHP WebRTC 4G/5G Cloud SaaS REST API
View Project

https://www.youtube.com/playlist?list=PLhuHErN4WK6KB_FSTW154BTSMR7iLE2j0
Hades Gate - Autonomous Smart Gate with Active Suspension Mechanism Tobor Technology LLC
  • Researched and deployed an intelligent automated gate system, integrating a lead screw wheel-lift mechanism to ensure the wheels maintain constant ground contact (even on uneven terrain), enabling smooth gate operation and protecting the traction motor.
  • Smart Mechanical Mechanism: Combines a gate traction motor and a lead screw system for wheel height adjustment; a damping spring maintains consistent downward pressure on the ground surface.
  • Height Control Algorithm: A Sonar sensor measures the actual distance between the spring top and the wheel axle; closed-loop feedback logic automatically lowers the lead screw when low traction is detected (spring extended) and raises it when encountering obstacles/inclines (spring over-compressed), keeping the spring at its ideal working state (compressed ~2cm).
  • IoT Hardware: ESP32 running ESPHome firmware, with complex logic customized using Lambda expressions; parallel integration of an RF Radio receiver circuit for a handheld remote and Wi-Fi for Internet-based control.
  • Smart Home Integration: Directly integrated into Home Assistant, supporting control via Mobile App, voice commands, and automation routines.
  • Security Monitoring: Integrated a PTZ Camera supporting two-way audio and wide-angle viewing directly within the gate control interface.
ESP32 ESPHome Home Assistant Sonar Sensor RF Radio PTZ Camera IoT Closed-loop Control Lead Screw Actuator
Demo Video

https://www.youtube.com/watch?v=hz6x3JX5zDs

WORK EXPERIENCE

Tobor Technology LLC

HCMC - USA (Remote)

Robotics Research & Development Engineer

04/2025 - Present

  • Focus: Researching and architecting the full software stack for robot control, low-latency Media transmission systems, and Cloud Robotics infrastructure for the UGV product line.
  • Led R&D of remote robot control solutions over 4G/5G mobile networks and Wi-Fi Mesh.
  • Worked directly with clients and inspectors in the United States to gather technical requirements and optimize surveying and mapping features on the robot.
  • Built the central control circuit board and integrated complex sensors (Lidar, Thermal, Laser) into a unified ecosystem.
  • Achievement: Successfully delivered 4 core projects, enabling the company to establish a strong foothold in the U.S. infrastructure inspection market.
  • Python
  • Flask
  • WebRTC
  • WebSocket
  • Raspberry Pi 5
  • SLAM
  • Lidar S2
  • Thermal Camera
  • MediaMTX
  • LiveKit
  • WHIP Protocol
  • Three.js
  • Embedded Linux

ADV Art Concrete Corporation

Ho Chi Minh City

Automation & Marketing Systems Specialist

05/2024 - 03/2025

  • Focus: Digital transformation and operational process automation.
  • GenAI Content Pipeline: Designed and deployed an automated content production workflow integrating LLMs (Gemini, OpenAI) and workflow orchestration tools (n8n, Make), reducing manual task time by 80%.
  • Data Management & Webhooks: Designed a data structure on Google Sheets as a central database; integrated Webhooks to trigger real-time data processing flows for the Social Media system.
  • Automated Video Engineering: Automated short-form video creation workflow using n8n + Google Cloud TTS + FFmpeg; auto-distributed to TikTok, Reels, and YouTube Shorts via API.
  • Built an automated system for generating SEO-optimized articles, product descriptions, and AI-generated illustration images.
  • n8n
  • Make (Integromat)
  • OpenAI API
  • Gemini API
  • FFmpeg
  • Google Sheets
  • Webhooks
  • Google Cloud TTS
  • SEO Automation
View Project

AURY Vietnam Co., Ltd.

Ho Chi Minh City

Systems Development & Automation Engineer

11/2022 - 04/2024

  • Focus: Digital infrastructure development and digitization of enterprise operational processes.
  • Low-code Ecosystem (Google AppSheet): Built a comprehensive Warehouse Management System (stock in/out, inventory, real-time reporting) and an intelligent HR & Attendance Management System with GPS Geofencing, automated payroll, and leave management.
  • Sales Management Module: Automated order creation, stock release, and contract workflows, reducing manual operations by 70%.
  • HubSpot CRM: Implemented and customized HubSpot, established two-way data flows between AppSheet and HubSpot via API/Automation; built behavior-based Lead Scoring & Email Automation.
  • Cloud Infrastructure: Administered the entire Google Workspace environment with deep access control, optimized WordPress websites for SEO and customer acquisition funnels.
  • Authored technical documentation and directly trained staff to operate warehouse, sales, and CRM systems.
  • Google AppSheet
  • Google Apps Script
  • HubSpot CRM
  • Google Workspace
  • WordPress
  • GPS Geofencing
  • API Integration
  • Email Automation
  • MySQL

Star Global Expert Solutions JSC

Ho Chi Minh City

Software Development & Digitization Solutions Team Lead

03/2020 - 04/2022

  • Focus: Development of a 3D interactive platform and Cloud Server infrastructure.
  • Web-360° Platform: Programmed and managed the development of a platform using JavaScript and Three.js; built algorithms to process and optimize rendering of heavy point cloud/mesh data in the browser.
  • Cloud Infrastructure (GCP): Designed and deployed server infrastructure on GCP (VM Instances), configured load balancing, security, and performance optimization for thousands of concurrent users.
  • HubSpot CRM Architecture: Set up full-funnel Automation Workflows; integrated smart Chat Flows and behavior-driven Email Marketing automation, syncing website data to CRM via API.
  • R&D & Field Deployment: Coordinated the technical team to execute large-scale nationwide digitization projects; provided consulting and training for Matterport Pro 2 equipment operation.
  • Three.js
  • JavaScript
  • Google Cloud Platform
  • HubSpot CRM
  • Matterport Pro 2
  • Point Cloud
  • 3D Visualization
  • Microservices

EDUCATION

Bachelor of Information Technology Engineering

Posts and Telecommunications Institute of Technology (PTIT)

09/2015 - 02/2020

Major in Information Technology
photo of me
  • 0963 316 316
  • charlie.pham787@gmail.com
  • Street No. 57, Binh Trung, HCMC
  • bit.ly/portfolio_charlie

TECHNICAL SKILLS

    • Robotics & Embedded Systems
    • Raspberry Pi 5
    • ESP32 (ESPHome/Arduino)
    • Motor Drivers (BTS7960)
    • Lead Screw Actuators
    • Lidar S2 (SLAM)
    • Sonar Sensor
    • Thermal Imaging Camera
    • Laser Distance Sensor
    • Embedded Linux (Ubuntu/Raspberry Pi OS)
    • Sensor Fusion
    • Closed-loop Control
      Networking & Real-time Communication
    • WebRTC (WHIP/WHEP Protocol)
    • LiveKit SFU
    • WebSocket
    • RTSP/RTMP
    • 4G/5G Teleoperation
    • EasyMesh Wi-Fi / Seamless Roaming
    • GStreamer
    • MediaMTX (Edge Gateway)
    • MQTT
    • HTTP/HTTPS
      Backend Development
    • Python (Flask)
    • PHP (Laravel)
    • Node.js
    • MySQL
    • Redis Cache
    • Google Sheets (as Database)
    • REST API Design
    • Webhooks Integration
      Frontend & 3D Visualization
    • JavaScript
    • HTML5 / CSS3
    • Three.js
    • Responsive UI / HMI Design
      Cloud & DevOps
    • Google Cloud Platform (VM Instances)
    • AWS (EC2)
    • Linux Server Administration
    • Git / GitHub
    • Docker
    • Load Balancing & Security
      Automation & Low-code
    • n8n
    • Make (Integromat)
    • Google AppSheet
    • Google Apps Script
    • FFmpeg
    • Google Cloud Text-to-Speech
      AI Integration
    • OpenAI API
    • Gemini API
    • GenAI Content Pipeline
    • AI Image Processing
    • LLM Workflow Orchestration
      CRM & Business Systems
    • HubSpot CRM (Architecture & Automation)
    • Google Workspace Administration
    • WordPress (SEO Optimization)
    • Matterport Pro 2

Languages

  • Vietnamese
    Native
  • English
    Professional (Technical proficiency)

Interests

  • Robotics R&D
  • IoT & Smart Home Automation
  • Cloud Architecture & SaaS
  • 3D Visualization & Web
  • AI & Generative AI Pipeline
  • Embedded Systems Design
  • Teleoperation & Remote Control