About me
Hi there, I'm Tan Nguyen (Sonjj) 👋
I am an independent product developer and webmaster based in Vietnam.
With over 15 years of hands-on experience in web development, server management, and system automation, I build and operate standalone digital products that serve users worldwide.
I believe time is everyone's most valuable asset. The driving purpose behind most of the tools I create is simple: automate repetitive, tedious tasks on the computer so people can spend less time staring at screens and more time on what truly matters.
Featured Projects & Ecosystem
Here are some of the active tools and services I have built to protect online privacy, handle email/SMS utilities, and automate repetitive workflows:
| Product | Description | Status |
|---|---|---|
| SmailPro | Temporary disposable email service protecting personal inboxes from spam, malware, and unwanted trackers. |  |
| SMSer | Receive SMS online with virtual numbers worldwide to keep your real phone number private and secure. | |
| YChecker | Fast and reliable bulk email address verification tool to validate deliverability. | |
| UGener | Random identity and persona generator for safe form signups and software testing. | |
| CardGener | Algorithm-compliant test card generator built for developers testing checkout integrations safely. | |
| Sonjj API | Developer-focused API hub providing SEO intelligence, email validation, crypto quotes, and ecosystem tools. | |
Tech Stack & Philosophy
I favor pragmatic engineering: choosing tools that solve real problems, run reliably, and require minimal maintenance over fleeting trends.
- Backend & Core: PHP (Laravel), Python (FastAPI), MySQL, Nginx, Docker.
- Automation & Ops: Linux server administration, Shell scripting, n8n, Airtable, REST APIs.
- AI & Efficiency: Practical integration of LLMs for workflow automation and data processing.
About This Site
Sonjj.com serves as my central documentation and knowledge hub where I share:
- Practical case studies, architecture notes, and lessons learned from running live products.
- Actionable guides on automating desktop and web workflows.
- API references and updates across my product ecosystem.
Feel free to explore the guides or reach out via the Contact page.