Full-Stack Web Developer

Hey, I'm DavidHE 👋

I build modern web applications with Python/Flask backends and clean, responsive frontends. Passionate about exploring new web technologies, AI tools, and sharing practical development guides with fellow developers. Let's build together!

  • Python/Flask Backend
  • Modern Frontend
  • Full-Stack Development
  • AI Integration
15+ Articles Published
10K+ Followers
3+ Years Teaching
Abstract 3D illustration representing innovation

About Me

My journey from curious student to developer educator, and why I'm passionate about teaching others

DavidHE - Developer Educator ✨ Full-Stack Developer

Building Modern Web Apps

I'm passionate about building full-stack web applications that solve real problems. From Python/Flask backends to clean, responsive frontends, I love working across the entire stack. What started as curiosity has evolved into 3+ years of professional web development.

My journey spans the full spectrum: cafe management systems, language learning platforms, portfolio sites, and AI-powered apps. Along the way, I've discovered that sharing what I learn with other developers is incredibly rewarding. That's why I write guides about web development, Flask, modern frontend techniques, and AI integration.

Currently:
3rd-year IT student at ICTU | Content creator (10K+ followers) | Building full-stack web apps & sharing development guides

Python/Flask Full-Stack Modern Frontend AI Tools

My Approach

  • Learn by doing: Every guide includes practical, hands-on examples
  • Keep it simple: Break down complex topics into clear steps
  • Share freely: Knowledge should be accessible to everyone
  • Stay curious: Always exploring new tools, especially AI innovations

"I believe the best way to truly understand something is to share it with others. That's why I write about everything I learn—from Python basics to the latest AI tools."

What I'm working on & sharing:

  • Full-stack web apps with Python/Flask & modern frontend
  • Web development guides & best practices
  • AI/LLM integration in web applications
  • Developer tools and productivity tips
Quiet street at sunset
Minimal desk setup by the window
Morning coffee and sketchbook
Running in misty park
Reading corner at night
Cozy coffee shop
Mountains and lake view
Creative desk with drawings
Creative 9
Creative 9
Running in misty park
Running in misty park
Running in misty park
Running in misty park
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Technical Skills

The technologies I use to build and teach

Full-stack Web Development

Over 3 years of full-stack experience, specializing in large-scale, high-performance, and scalable web apps.

  • HTML5/CSS3
  • JavaScript/ES6+
  • Next.js (Basic)
  • APIs (integration, consumption & design)
  • Python
  • .NET Core (C#)
  • RESTful APIs
  • SQL (DB design & queries)
  • Docker
  • AWS (basic cloud services)
  • CI/CD (Basic)
  • Performance Tuning

AI Tools & Ecosystem

Using modern AI tools to accelerate development and improve product quality.

  • Visual Studio Code
  • Visual Studio 2022
  • Cursor (AI Assistant)
  • GitHub Copilot / Tabnine
  • Claude (LLM)
  • Grok (LLM)
  • GPT (LLM)
  • Gemini (LLM)
  • Google AI Studio

Digital Content Creation & Media

Hands-on experience building a personal brand and engaging audiences on digital platforms.

  • TikTok (9K+ Followers)
  • CapCut (quick editing)
  • Content strategy
  • Streamer / YouTuber
  • Adobe Premiere Pro
  • Photoshop (Thumbnail/Image Design)
  • MC at TNTV
  • Scriptwriting
  • Media content creation

Selected Projects

Real-world applications I've built. Each project taught me valuable lessons I share in my tutorials.

HE Coffee — cafe management web app

HE Coffee — Cafe Management App

An internal system for managing menu items, orders, tables, and daily reports. Focused on clean UI, fast input flows, and exportable summaries.

  • Python
  • HTML
  • CSS
  • JavaScript
LearnLangs — AI-powered language learning app

LearnLangs — Language Learning App

A learning platform with AI pronunciation assessment, vocabulary games, and exam modules. Built for performance and extensibility.

  • C#
  • .NET (Framework)
  • ASP.NET / Blazor
typingtest — Minimal typing practice web app

typingtest — Typing Practice App

A minimalist typing trainer inspired by Monkeytype. Practice with random text, timed or word-count modes, and real-time metrics (WPM, accuracy, errors). Built with a lightweight Python backend and modern front-end for speed and focus.

  • Python (Flask)
  • HTML
  • CSS
  • JavaScript

Latest Articles

Practical guides on full-stack web development, Python/Flask, and modern tools

National Scientific Conference on Multi-document Summarization
New Research

Honored to Attend and Participate in National Scientific Conference

Attended the National Scientific Conference on "Multi-document Summarization Solutions using Pre-trained Language Models and Deep Learning in Education" and shared research on digital technology in architectural reconstruction.

Read Article
Achievement Unlocked: Second Prize Winner
New Achievement

[Achievement Unlocked] Proud Winner of the Second Prize! 🥈

Thrilled to share that my team and I have officially taken home the Second Prize at the finals of the "Developing AI-Integrated Applications in Education 2025" competition.

Read Article
Specialized seminar on advanced technology applications in biomedical science and AI
Research & Technology

Seminar: Advanced Technology Applications in Biomedical Science and Artificial Intelligence

A specialized seminar at ICTU featuring experts from HKMU on 3D Ultrasound, Quantum Machine Learning, and their applications in modern medicine.

Read Article
From Student to Discussion Partner: Immersing in AI with Dr. Lin at ICTU
AI & Research

From Student to Discussion Partner: Immersing in AI with Dr. Lin (FCU) at ICTU

A memorable milestone at ICTU's specialized seminar on AI research, featuring Dr. Feng Cheng Lin from Feng Chia University, Taiwan.

Read Article
MC Experience at Thai Nguyen Radio and Television
Experience Media

MC Experience at Thai Nguyen Newspaper and Television Broadcasting

An unforgettable experience hosting programs for Thai Nguyen Newspaper and Television Broadcasting, exploring traditional Then music, tea culture, and making mooncakes.

Read Article
My Journey as English Club President
Student Life

My Journey as English Club President

A comprehensive journey through my leadership experience, from building the foundation to major achievements, competitions, and the valuable lessons learned along the way.

Read Article

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Research & Technology

Specialized Seminar: Advanced Technology Applications in Biomedical Science and Artificial Intelligence

On September 22, Thai Nguyen University of Information and Communication Technology (ICTU) successfully organized an important specialized seminar, marking academic and research collaboration with experts from the Department of Electronic Engineering and Computer Science at Hong Kong Metropolitan University (HKMU).

The event attracted the enthusiastic participation of leadership, faculty, researchers, and students from ICTU, creating a vibrant and highly practical academic exchange atmosphere.

Specialized seminar at ICTU - Overview
The specialized seminar at ICTU with enthusiastic participation from faculty and students

✨ Core Content: The Intersection of Technology and Medicine

The seminar focused on two research areas that are among the world's top priorities:

1. Advancing 3D Ultrasound Tools for Carotid Atherosclerosis: Transforming Clinical Trials with Novel Biomarkers and Automation

Speaker: Dr. Shirley CHEN, Senior Lecturer, HKMU.

Dr. Shirley Chen presenting on 3D Ultrasound
Dr. Shirley Chen presenting on advanced 3D Ultrasound technology

Key Highlights: Dr. Shirley Chen's presentation focused on integrating advanced 3D Ultrasound technology with Automation algorithms. This approach not only improves the accuracy and efficiency of medical imaging diagnostics but also provides novel biomarkers for evaluating and monitoring carotid atherosclerosis, thereby optimizing clinical trials.

2. Leveraging Quantum Machine Learning to Classify Biosignals for Disease Detection

Speaker: Assoc. Prof. Dr. Kevin HUNG King Fai, Head of Department, HKMU.

Assoc. Prof. Dr. Kevin Hung presenting on Quantum Machine Learning
Assoc. Prof. Dr. Kevin Hung introducing Quantum Machine Learning

Key Highlights: Prof. Kevin Hung introduced the breakthrough potential of Quantum Machine Learning (QML). QML, with its ability to process complex data on a large scale and at higher speeds than classical computers, is being applied to analyze biosignals. This research opens new pathways for early and accurate detection of various diseases, demonstrating the indispensable role of quantum physics and AI in modern medicine.

Discussion and exchange scene at the seminar
Enjoying and learning directly from leading experts.

🤝 The Importance of International Collaboration

The seminar served not only as a platform for sharing specialized knowledge but also as an opportunity to strengthen the collaborative relationship between ICTU and HKMU—a public university in Hong Kong renowned for its applied training and research programs.

The event successfully facilitated international academic connections, creating an environment for Vietnamese researchers, faculty, and students to directly access world-leading technological trends in Information Technology and Biomedical Science. This provides a solid foundation for developing high-quality human resources capable of integration and contributing to the nation's scientific and technological development.

Group photo of faculty, Dr. Lin, and students
The group photo captures the wonderful learning spirit and the tight academic cooperation between ICTU and HKMU.
Student Life

My Journey as English Club President

This is a comprehensive article compiling the memories from my time as President of the English Club at ICTU. A journey filled with challenges, achievements, and unforgettable moments that shaped not just my leadership skills, but also my personal growth.

1. Introduction - The Beginning

Stepping into the role as English Club President was both an honor and a significant responsibility. I remember the mix of excitement and nervousness that filled me during my first official meeting. Taking on this leadership position meant I would be responsible for organizing events, managing a diverse team, and representing our club at various competitions and activities.

The first official meeting was a moment I'll never forget. Standing in front of the members, I felt the weight of expectations but also the thrill of new possibilities. It was the beginning of a journey that would teach me invaluable lessons about leadership, teamwork, and personal growth.

First official meeting as English Club President
The Beginning Moment – Full of Passion and Expectation.

2. Building the Foundation

The early days were all about building connections and establishing a strong foundation for the club. Our early club meetings focused on team bonding activities that brought members closer together. We organized fun games and interactive sessions that not only improved English skills but also created lasting friendships.

Learning to lead and manage a diverse team was one of my first challenges. Each member brought unique perspectives and talents, and it was my responsibility to create an environment where everyone felt valued and motivated. Through these early activities, I began to understand the true meaning of collaborative leadership.

Team bonding activities and club meetings
Early club meetings with fun games and team bonding activities.

3. Major Achievements & Competitions

A. English Festival 2024-2025

One of the most memorable achievements was leading our team to compete at Thai Nguyen University. The English Festival 2024-2025 was a significant event that brought together English clubs from various universities. The competition was intense, but our team's dedication and preparation paid off.

We won the consolation prize, receiving 1,500,000 VND. But more than the prize money, the pride of representing ICTU on the red carpet was an unforgettable experience. Standing there with my team, I felt immense pride in what we had accomplished together.

First official meeting as English Club President
First official meeting as English Club President
First official meeting as English Club President

B. Awards & Recognition Ceremony (2023-2024)

The Awards & Recognition Ceremony for the 2023-2024 academic year was a moment of celebration for our entire team. Receiving awards for club excellence was a testament to the hard work and dedication of every member. Standing with the entire team as we were honored was a moment that reinforced the importance of collective effort.

First official meeting as English Club President

C. Olympic Tiếng Anh ICTU 2024

Organizing the Olympic Tiếng Anh ICTU 2024 was one of the largest responsibilities I undertook as President. This major English competition required months of planning, coordination, and teamwork. Seeing so many students participate and excel in the competition was incredibly rewarding. The event not only showcased the English skills of ICTU students but also strengthened the English learning community at our university.

First official meeting as English Club President

D. STAR Awards 2024

Another significant achievement was our participation in the STAR Awards 2024. We competed in the "Young Generation - Healthy Lifestyle for a Healthy Heart" category, which required us to create meaningful content about health and wellness. Once again, our team's efforts were recognized with another consolation prize win of 1,500,000 VND.

Presenting alongside talented teammates was an experience that taught me the value of collaboration and mutual support. Each team member contributed their unique strengths, creating a presentation that was both informative and engaging.

First official meeting as English Club President

E. T.E.C Spell-Off Competition

The T.E.C Spell-Off Competition was a fun and challenging experience that tested our spelling skills and quick thinking. While it was a lighter competition compared to others, it provided valuable opportunities for members to practice and improve their English vocabulary in a competitive yet friendly environment.

Major competitions and achievements
Major events and competitions – where we connected and shined.

4. Special Events & Cultural Activities

A. Colourful ICTU 2025

Colourful ICTU 2025 was one of the most vibrant events we organized. This cultural celebration brought together international guests and students from various backgrounds. We organized interactive games and meaningful exchanges that celebrated cultural diversity and created a vibrant, inclusive community.

The event was a beautiful representation of how language and culture can bring people together. Seeing students from different countries and backgrounds connect through English and shared activities was truly inspiring. It reinforced my belief in the power of cultural exchange and inclusive leadership.

Major competitions and achievements
Major competitions and achievements
Major competitions and achievements

B. Vietnamese Teachers' Day Celebration

The Vietnamese Teachers' Day Celebration was a heartfelt event where we honored our mentors and advisors. Organizing this celebration was particularly meaningful as it allowed us to express our gratitude to the teachers who had supported and guided us throughout our journey.

The gift-giving and appreciation activities created a warm atmosphere that strengthened the bond between students and teachers. It was a reminder that leadership is not just about organizing events, but also about fostering meaningful relationships and showing appreciation to those who support us.

Major competitions and achievements
Major competitions and achievements

5. Growth & Lessons Learned

My time as English Club President was a period of tremendous personal and professional growth. One of the most significant improvements was in my public speaking skills. Leading meetings, presenting at competitions, and speaking at various events helped me become more confident and articulate in expressing my ideas.

Event management and organization became second nature to me. From planning small weekly activities to organizing major competitions, I learned to balance multiple responsibilities, manage timelines, and coordinate with various stakeholders. These skills have proven invaluable in both my academic and professional life.

Perhaps the most important lesson was about teamwork and collaboration. Leading a diverse team taught me that the best results come from leveraging each member's unique strengths. I learned to listen, delegate effectively, and create an environment where everyone felt empowered to contribute.

Handling pressure and responsibility was another crucial skill I developed. There were moments of stress and uncertainty, but these challenges taught me resilience and problem-solving. I learned that leadership is not about having all the answers, but about finding solutions together with your team.

Major competitions and achievements
Major competitions and achievements

6. Conclusion - Memories That Last

Looking back on my journey as English Club President, I am filled with gratitude for all the experiences, challenges, and achievements. The memories we created together – from the excitement of our first meeting to the pride of winning competitions, from organizing cultural events to celebrating with teachers – these are moments that will stay with me forever.

This journey was not just about leading a club; it was about personal transformation, building lasting friendships, and contributing to a community that values learning and growth. The skills I developed, the relationships I built, and the memories I created have shaped who I am today.

To all the members, advisors, and supporters who were part of this journey – thank you. These memories are not just mine; they belong to all of us who shared in this incredible experience. The English Club will always hold a special place in my heart, and I am proud to have been part of its story.

Major competitions and achievements
AI & Research

From Student to Discussion Partner: Immersing in AI with Dr. Lin (FCU) at ICTU

That afternoon at ICTU was truly a memorable milestone for me and my fellow technology enthusiasts. The specialized seminar, "Artificial Intelligence Research Experience Sharing: Embedded Devices and Image Processing," featuring Dr. Feng Cheng Lin from Feng Chia University (FCU), Taiwan, was not merely a lecture but a high-level dialogue about the future of AI.

Dr. Lin conveyed in great detail the technical challenges of "embedding" complex AI models into devices with limited memory and power. This is precisely the point of convergence between theory and practical application that I and many engineering students are constantly seeking.

Dr. Feng Cheng Lin passionately shares strategies for optimizing AI models
Dr. Feng Cheng Lin passionately shares strategies for optimizing AI models, opening new directions for smart devices.

💬 The Dialogue Moment: Moving Beyond Textbook Theory

The part I anticipated the most—and the part I actively participated in—was the Q&A session. After learning about the techniques of Model Pruning and Quantization, I took the initiative to pose a question about the feasibility of deploying specific image processing algorithms in a real-time environment.

For me, asking a question was not just about satisfying a personal curiosity; it was an opportunity to validate that what we are learning in school can be directly applied to the most cutting-edge research.

Student actively engaging in Q&A session
I myself am actively engaging in the Q&A, representing the deep interest of ICTU students in the practical application of AI. That was the moment we transitioned from learners to discussion partners.

🤝 Academic Connection and Personal Vision

Directly participating in this discussion has given me a profound insight into future research directions. This seminar is clear proof of the importance of international cooperation in education and research.

Photo with Dr. Lin
Enjoying and learning directly from leading experts.

This is a valuable memory, a great motivation for me and my peers to continue striving in the field of AI.

The seminar is not only a place for knowledge sharing but also a bridge for a generation of Vietnamese engineers ready to tackle global technological challenges.

Group photo of faculty, Dr. Lin, and students
The group photo captures the wonderful learning spirit and the tight academic cooperation between ICTU and FCU.
Achievement

[Achievement Unlocked] Proud Winner of the Second Prize! 🥈

I am thrilled to share that my team and I have officially taken home the Second Prize at the finals of the "Developing AI-Integrated Applications in Education 2025" competition, hosted by the Faculty of Information Technology at ICTU.

Close-up of the Giải Nhì placard
The Second Prize (Giải Nhì) award - A proud moment of recognition for our hard work.

This journey has been incredible. Integrating Artificial Intelligence into education is more than just a technological trend; it's about creating practical solutions that truly enhance the teaching and learning experience. This award is a wonderful validation of our team's hard work and research over the past few months.

Team photo holding certificate on stage
Celebrating our achievement on stage with the certificate - a moment of pride and accomplishment.

I want to extend a huge thank you to the organizers for creating this intellectual playground, our mentors for their guidance, and especially my amazing teammates for their dedication. This achievement is a huge motivation for me to continue innovating in the EdTech space.

Large group photo with all participants
Group photo with all participants, organizers, and mentors - celebrating innovation in AI and Education.

Here's to the next milestone! 🚀

New Research

Honored to Attend and Participate in National Scientific Conference

I was honored to be invited to attend and participate in the National Scientific Conference: "Multi-document Summarization Solutions using Pre-trained Language Models and Deep Learning and Applications in Education".

The conference brought together researchers, academics, and professionals working on cutting-edge solutions in natural language processing, AI, and their applications in educational settings. It was an inspiring platform to learn about the latest developments in multi-document summarization techniques and their potential impact on education.

During the event, I had the opportunity to engage with research related to digital technology in architectural reconstruction and simulation at the Cat Tien National Archaeological Site. This research explores how digital technologies can be applied to preserve and reconstruct cultural heritage, particularly ancient architectural structures.

Photo with conference banner
Photo with the conference banner at the National Scientific Conference.

Here are some photos from the conference:

Group photo with conference delegates
Group photo with conference delegates and participants.
Photo with supervising Associate Professor
Photo with my supervising Associate Professor at the conference.

I'm grateful to the organizers for creating this valuable platform for academic exchange and to all the participants for the insightful discussions. This experience has been inspiring and motivates me to continue exploring innovative applications of technology in various fields.

Experience Media

MC Experience at Thai Nguyen Newspaper and Television Broadcasting

I had the incredible opportunity to work as an MC for Thai Nguyen Newspaper and Television Broadcasting, where I embarked on a fascinating cultural journey exploring traditional Vietnamese heritage through various immersive experiences.

Experiencing Traditional Then Music

One of the most memorable experiences was learning about and experiencing the traditional Then music. Then is a unique form of folk music from the northern mountainous regions of Vietnam, characterized by its distinctive stringed instruments and melodic storytelling. I had the privilege of meeting with traditional performers who shared their knowledge and passion for this beautiful art form.

Experiencing traditional Then music
Learning about traditional Then music with local performers and cultural experts.
Then music performance at Thai Nguyen Radio and Television
Capturing the Then music performance during the MC program.
Traditional Then music cultural experience
Immersing in the traditional Then music cultural experience.

The performers, dressed in traditional attire, played their instruments with such skill and emotion, transporting us to a different time. It was a profound experience to witness this living cultural heritage and understand its significance in preserving Vietnamese traditions.

Exploring Tea Culture Space

Another highlight was experiencing the traditional tea culture space. Vietnam has a rich tea culture, and I had the chance to participate in a traditional tea ceremony in a beautifully designed wooden tea house. The setting was warm and inviting, with wooden paneling, traditional decorations, and shelves displaying various tea products.

Traditional tea culture space experience
Exploring the traditional tea culture space with its beautiful wooden design and cultural atmosphere.

During the tea ceremony, I learned about different types of Vietnamese tea, the proper way to brew and serve tea, and the cultural significance behind each gesture. It was a meditative and educational experience that deepened my appreciation for Vietnamese tea culture and its role in social bonding and hospitality.

Enjoying traditional tea ceremony
Participating in a traditional tea ceremony and enjoying the authentic tea experience.

Making Traditional Mooncakes

One of the most hands-on and enjoyable experiences was learning to make traditional mooncakes. Mooncakes are an essential part of the Mid-Autumn Festival in Vietnam, and making them from scratch was both challenging and rewarding.

Enjoying tea and making mooncakes
Combining the tea ceremony experience with traditional mooncake making.
Learning to make traditional mooncakes
Hands-on experience learning to make traditional mooncakes.

Under the guidance of experienced artisans, I learned the intricate process of preparing the dough, creating the fillings, and shaping the mooncakes with traditional molds. The process required patience and precision, but the result was delicious mooncakes that carried both flavor and cultural meaning. It was wonderful to connect with this traditional craft and understand its importance in Vietnamese celebrations.

Reflections on the Experience

Working as an MC for Thai Nguyen Newspaper and Television Broadcasting provided me with unique opportunities to explore and share Vietnamese culture. Each experience - from the melodic Then music to the serene tea ceremonies and the hands-on mooncake making - enriched my understanding of Vietnam's cultural heritage.

These experiences reminded me of the importance of preserving and promoting traditional culture in the modern world. As an MC, I had the privilege of bringing these cultural treasures to a wider audience, helping to bridge the gap between tradition and contemporary media.

I'm grateful to Thai Nguyen Newspaper and Television Broadcasting for this incredible opportunity and to all the cultural experts, performers, and artisans who shared their knowledge and passion with me. This journey has been both professionally enriching and personally meaningful.

Watch the programs directly:

What People Say

Testimonials from clients, colleagues, and collaborators.

Career Timeline

Key milestones in my professional journey.

2021 - Present

Full-Stack Developer

Building large-scale web applications with Python, .NET Core, and modern JavaScript frameworks. Specializing in high-performance, scalable solutions.

2020 - 2021

Content Creator & Digital Media

Started creating digital content, building a personal brand on TikTok and other platforms. Gained experience in video production, scriptwriting, and audience engagement.

2019 - 2020

Education & Learning

Focused on learning full-stack development, mastering Python, JavaScript, and various web technologies. Built foundational projects and gained hands-on experience.

Certifications & Achievements

Professional certifications and notable achievements.

🎓

Full-Stack Development

Self-Taught & Professional Experience

2021 - Present

📱

Content Creator

TikTok, YouTube

10K+ Followers

🎤

MC at TNTV

Thai Nguyen Television

Media Production

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Get in Touch

Discuss your project and how I can contribute to its success.

Alternatively, email me directly at davidhoangem@gmail.com