01
Check whether the issue is workflow or software
If the real pain is repeated handoffs, duplicated data entry, and unclear ownership, the first fix is often process design, not a full rebuild.
AWS Certified · Full-Stack · 5+ Years Production
Launch for merchants,upgrade for teams
Still taking orders through LINE, reconciling transfers by hand, and tracking everything in spreadsheets? Or dealing with brittle internal workflows that everyone wants to automate but no one dares to touch? If you are building an AI SaaS tool or a developer tool, the same principle applies — clarify the core problem first, then ship fast. I build branded websites, payment and order flows, internal admin tools, and MVPs that make the business easier to run.
300K+monthly active users served
99.9%production uptime
15%→0.5%failure rate reduced
70%↓manual review load reduced
50%↓CI/CD build time reduced
5+ yrsfull-stack experience
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// Services
What I actually help with
I do not take vague “build anything” projects. The focus is on four delivery areas where I can be accountable for the result.
01◎
Brand Website + Payments Backend
If you are still closing orders through chat and manual transfers, I can help you launch a branded website with ECPay card payments, convenience-store pickup, product management, order tracking, and inventory workflows.
Brand SiteECPayOrder AdminInventory
Best for: merchants, studios, and physical shops building their own sales channel
02▦
Internal Systems & Admin Tools
When every department has a different Excel file, Google Form, or LINE thread, the bottleneck is usually the workflow. I build unified back-office systems with CRM, dashboards, and role-based permissions.
CRMDashboardRBACREST API
Best for: SMEs relying on manual ops and trying to clean up internal processes
03◈
Legacy System Refactor & Extension
If the original developers are gone and no one wants to touch the system, I can assess the current architecture, refactor safely, and extend features without disrupting production service.
RefactorAPI IntegrationAWSNode.js / Go
Best for: teams stuck with fragile legacy systems that still need new features
04⬡
Product MVP Delivery
If you have a product idea but no reliable technical partner, I can help you ship an MVP in 4 to 8 weeks with React, Node.js, PostgreSQL, deployment, and CI/CD included. Especially suited for indie hackers and founders building AI tools or developer-facing products.
Next.jsNode.jsPostgreSQLVercel / AWS
Best for: indie hackers, AI tool founders, and solo builders who need a pragmatic technical partner to ship fast
// How to decide
If you are unsure whether to rebuild, refactor, or wait, start here
Before listing features, clarify the bottleneck. In most cases, these three checks make the decision much easier.
02
Assess whether the current system is still salvageable
If the core data is stable and only extension work has become painful, a phased refactor or partial replacement may be safer than starting over.
03
Only then decide whether a new build is justified
A rebuild makes sense when the current system clearly blocks operations and future expansion. Otherwise, a smaller intervention may be the better investment.
If everything feels urgent but nothing is clearly first, the immediate problem is usually prioritization, not development capacity.
// Selected Work
Production projects, not demos
Everything shown here shipped to real users or real business teams.
01E-commerce
Skera Jewelry — skera.net
Built a diamond e-commerce platform with ECPay checkout, convenience-store pickup, CRM tooling, third-party diamond API integration, and custom inventory management.
Next.jsECPayCRMAPI Integration
full checkout integration
02AWS Architecture
vocus — 300K+ MAU content platform
Designed an AWS event-driven notification system, an AI image fraud-detection pipeline, and improved email delivery reliability from 15% failure to 0.5%.
AWSLambdaSQSAI/ML
99.9% uptime
03B2B Dashboard
CloudMile — advertising dashboard
Delivered a B2B multi-chart analytics dashboard with ECPay subscription billing for enterprise clients, from zero to production in one month.
ReactNext.jsData VizECPay
shipped in 1 month
04Online Education
AmazingTalker — tutoring platform
Built responsive product features for a global language-learning marketplace while maintaining 80%+ unit test coverage.
VueNuxt.jsJesti18n
multi-market i18n
// Stack
Full-stack capabilities
Frontend
Backend
Cloud / AWS
DevOps
AI / LLM
AWS Certified Developer – Associate
AWS Certified Cloud Practitioner
// Articles
Notes for anyone trying to run a steadier business
Written for merchants and teams trying to smooth out order flows, brand websites, and internal systems — focused on common pain points, real risks, and practical next steps.
How to Scope an MVP: The Thing Founders Overestimate Isn't Features, It's Timeline
A good MVP isn't a smaller version of the full product. It's the smallest working flow that can validate demand — without burning your budget on the wrong things first.
Custom-Built System vs. Off-the-Shelf SaaS: How Should SMBs Choose?
SaaS looks cheap and fast, custom systems look expensive and slow — but the real comparison is process fit, onboarding friction, data integration, and long-term ownership.
AI Can Already Write Code — So Why Do We Still Recommend Hiring Someone In-House at a Certain Stage?
AI and outsourcing can cover capability and speed. But once a system can't afford downtime, once the founder's time is being eaten by upkeep, once customers start asking about reliability — what the business needs may be someone in-house who's willing to own it with you.
// Contact
Have a project in mind?
Fill out the form and I usually reply within 24 hours. The first consultation is free, so we can clarify the actual problem before talking scope.