**David Sim**
Cliffside Park, 07010
410 979 6851 | dhsim2000@gmail.com
LinkedIn: linkedin.com/in/david-dae-hyun-s-a044b450
Website: sposync.com | GitHub: github.com/sposyncCom/angularFront

### **Principal Software Engineer**
Full-stack development (Django-Python, Angular-Typescript). Expertise in IIoT and smart home solutions (AWS/on-premise device management, connectivity). Strong in use case/scenario design, test-case generation, and backend/frontend development (Redis/Kafka/Spark, JavaScript/Typescript).

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### **Areas of Expertise**
- **End-to-End Web Applications**: Prototype-to-production platform, apps, and UI development.
- **Project Management**: Schedule-driven execution with resource allocation and quality deliverables.

### **Technical Skills**
- **Backend**: Python (Django, Flask), Nginx, Gunicorn, Redis, Celery, PostgreSQL, WebSocket/WebRTC.
- **Frontend**: HTML, JavaScript, TypeScript, Angular, ReactJS (< v2).
- **Software Architecture**: Requirement generation, testing (Epic/Story), validation.
- **Networking**: Wireless/wired protocols, signaling systems.

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### **Work Experience**

**Johnson Control Inc** (Remote) | *July 2022–August 2023*
**Principal Software Engineer – IIoT L3 Support & Utility Development**
- Resolved L3 issues via Salesforce/JIRA, monitored APIs (Data Dog).
- Developed Python ODBC tools for real-time DB validation and automation.

**ANSYS** | *July 2019–May 2021*
**Technical Account Manager**
- Pre-sale consulting for wireless hardware performance analysis and data optimization.

**ICT Center, KESCO / Sung Kyun Kwan University** | *March 2016–July 2018*
**Director / Industry Collaboration Professor**
- Built IoT platforms (LoRa/NB-IoT sensors, OneM2M/MQTT).
- Implemented RDB/NoSQL analytics with alarm learning.

**Samsung Electronics** | *2010–2016*
**Sr. Director / Team Lead / Lab Lead**
- Led R&D for smartphone (RCS, kernels), smart TV (NLP, B2B), and set-top box solutions.
- Developed DLNA All-Share, smart home platforms, and IoT integrations (robots, drones).
- **Key Achievements**:
- Cloud-based remote diagnostic field trials (North America).
- VR streaming with IoT devices (tele-robots, drones).

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### **Education**
**Ph.D., Electrical Engineering**
Texas A&M University
- Specialization: CMOS RFIC (VLSI Analog/Mixed Signal).
- Teaching Assistant: ADC/DAC testing.

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*Concise, skills-focused, and achievement-oriented.*

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