Profile of Jiun Yi Tan
Jiun Yi Tan Senior Full Stack Developer | SaaS, AI and Automation Full-stack developer with 7+ years of experience building and shipping production software.
What I build
– SaaS and web applications from scratch
– Business systems such as POS, CRM, ERP, booking, and admin platforms
– AI agents and chatbots connected to real business tools and APIs
– Telegram, WhatsApp, and Discord bots built directly against their platform APIs
– Payments, authentication, notifications, and email workflows
– Real-time features, chat, dashboards, and internal tools
– Video/image upload, validation, processing, transcoding, and delivery
– API integrations, automations, scraping, and browser automation
– Legacy system rewrites, migrations, bug fixes, and performance work
– Cross-platform mobile, desktop, and CLI applications
– WordPress customisation and maintenance
How I work
I work as both the developer and the technical owner of my projects. I handle plans, research, costing, architecture, frontend, backend, database, integrations, testing, deployment, and everything in between.
I use Claude Code and Codex as part of my development workflow. Since I started working with AI, the way I build has changed dramatically. Work that once took me 3 or 4 months can now be brought to a functional, testable stage within A WEEK.
That acceleration has allowed me to build more, experiment more, and ship more. I already have my own products live across web and mobile, while continuously exploring new technologies and developing prototypes that may evolve into future products or collaborations.
But AI is not the reason a product works.
With over 7 years of experience, I understand requirements beyond what is written on the surface. I’ve worked through real-world conditions, edge cases, technical risks, scalability challenges, failure points, and the countless things that can go wrong once a product leaves the development environment. I know how to anticipate many of those problems before they happen.
I care about code quality, testing, validation, and building products that can survive outside a demo environment.
AI has made me faster. It hasn’t made the decisions for me.
The tool changed the speed, not the decision-maker.
I prefer working mainly in writing so requirements, decisions, and progress stay documented. Calls when they are actually necessary.
Tech
React, Next.js, Vite, TypeScript, JavaScript, Tailwind CSS, Node.js, Python, PHP/Laravel, C#/.NET, C++, PostgreSQL, MySQL, MSSQL, MongoDB, SQLite, Redis, Supabase, Firebase, Cloudflare, AWS, Stripe, OpenAI, Anthropic Claude, FFmpeg, Playwright, Puppeteer, Selenium.
I also work with REST APIs, WebSockets, Telegram Bot API, WhatsApp Business API, Twilio, Discord bots, OAuth, JWT, RBAC, CI/CD, PDF/Excel generation, analytics, QR/barcodes, technical SEO, i18n, React Native, Expo, Flutter, Electron, WPF, and WordPress.
Available for one-off builds, small fixes, and ongoing part-time work.
Send me what you’re trying to build. I’ll tell you honestly whether I’m the right fit.
