ko-chan

ko-chan @kochan

About: Solo developer building Saru - an open-source multi-tenant subscription management platform. � Tech Stack: - Backend: Go + Echo + sqlc - Frontend: Next.js 14 + TypeScript - Database: Po

Joined:
Dec 27, 2025

ko-chan
articles - 11 total

Designing SaaS Commerce with State Machines [Part 11]

- Why \"string status\" breaks down in SaaS commerce

Learn More 0 0Feb 23

Evaluating GitHub Agentic Workflows — From a Claude Code User's Perspective [Part 10]

- What GitHub Agentic Workflows are

Learn More 1 1Feb 17

pnpm + Next.js Standalone + Docker: 5 Failures Before Success [Part 9]

- Why pnpm symlinks break in Next.js standalone Docker builds

Learn More 1 0Feb 16

Landmines and Solutions in Self-Hosted CI/CD: 15 Runners x Shared Docker Environment [Part 7]

- **Problem and solution patterns in self-hosted runner environments**

Learn More 0 0Feb 15

Turning Solo Development into Team Development with Claude Code Agent Teams [Part 8]

- How Claude Code Agent Teams work and when to use them

Learn More 0 0Feb 15

Building a 200K-Line SaaS Solo with Claude Code [Part 6]

- The reality of large-scale development with Claude Code

Learn More 0 0Jan 23

3 Pitfalls of Multi-Portal Authentication with Keycloak [Part 5]

Saru has 4 portals: System, Provider, Reseller, Consumer. Each runs on a different subdomain, but they share one Keycloak realm.

Learn More 3 0Jan 19

PostgreSQL RLS for Multi-Tenant Isolation: Protecting 4-Tier Data as a Solo Developer [Part 4]

- **Comparison of data isolation patterns for multi-tenant SaaS**

Learn More 0 0Jan 15

Next.js + Go Monorepo: Managing 4 Portals 4 APIs as a Solo Developer [Part 3]

- **Next.js + Go monorepo architecture patterns**

Learn More 0 0Jan 14

Testing WebAuthn in CI: E2E Automation with Virtual Authenticators and Mailpit [Part 2]

- **How to test WebAuthn (passkey) authentication in CI environments**

Learn More 0 0Jan 13

Tackling Unmaintainable Complexity with Automation: Building a Multi-Tenant SaaS Solo - Part 1

- How to approach building systems that exceed \"what one person can maintain\"

Learn More 0 0Dec 27 '25