Mark Christian Tan. Buildingsoftware.Shippingproducts.
I build production SaaS products across frontend, backend, data, integrations, and AI, and turn complex requirements into software teams can ship and maintain.
Services.What you can bring me in for.
Product Engineering
Full-stack features for your SaaS, from requirement to production.
AI Integration & Automation
Practical AI in your product or workflows, built so results can be checked.
Technical Consulting & Rescue
For codebases that are buggy, slow, or hard to change. Fixed incrementally, not rewritten.
Internal Systems & Workflows
Custom systems that replace spreadsheets and manual steps.
API Integrations & Security
Payments, banking, accounting, video, and email, connected with access control done properly.
Maintenance & Support
Bug fixes, updates, and small improvements from someone who knows your codebase.
Products I've helped ship.
Builds across the stack.Thinks in products.
Full-stack engineer in the Philippines, building production SaaS across construction, fintech, healthcare, and e‑commerce.
- I work across the whole product, from interface to production, without making it harder for the next engineer.
- Part of how I work and what I ship. I use coding agents daily and still own the decisions.
Got a productthat needs shipping?
If you're building a SaaS product and need another engineer who can work across the stack, I'd be happy to hear what you're working on.