Computer Science student at Sungkyunkwan University building backend and full-stack systems with APIs, auth, RBAC, cloud deployment, and testing.
TypeScript · NestJS · PostgreSQL · Redis · Docker · GCP · AI tooling
| Project | Signal | Proof |
|---|---|---|
| SaaS Starter API | Production-style multi-tenant backend with auth, RBAC, API keys, billing, quotas, audit logs, tests, Docker, Terraform, and GCP staging. | Live health, Swagger, architecture, walkthrough |
| Career-Ops OSS Contributions | Merged contribution to a large open-source AI job-search automation project, with maintainer feedback and scope reduction for long-term maintainability. | Merged Codex support PR, authored PRs |
| Receipt-to-Form Auto-Fill | Gemini-powered AI workflow with human review, validation, rate limiting, deterministic tests, and Vercel deployment. | Live demo, README, testing guide |
SaaS Starter API is my strongest backend project: a production-style multi-tenant SaaS API built with NestJS, PostgreSQL, Prisma, Redis/BullMQ, Stripe sandbox webhooks, Docker, GitHub Actions, Terraform, and GCP staging.
| Area | Implementation signal |
|---|---|
| Authentication | Email/password auth, JWT access tokens, refresh token rotation |
| Tenancy | Organization-scoped billing, usage, API keys, members, and audit logs |
| Authorization | Owner/admin/member/viewer RBAC |
| Billing | Stripe checkout, billing portal, webhook idempotency |
| Infrastructure | Docker, GitHub Actions, Terraform, Cloud Run, Cloud SQL, Redis |
| Quality | Unit, integration, e2e, and staging smoke test paths |
Proof links:
I contributed to santifer/career-ops, a large open-source AI job-search automation project.
| PR | Status | Signal |
|---|---|---|
| Add Codex support to Career-Ops | Merged | Added Codex workflow support while preserving the upstream architecture and adapting to maintainer feedback. |
| feat: add structured machine summaries to evaluations | Open | Active follow-up work for structured machine-readable evaluation summaries. |
| Area | Tools |
|---|---|
| Backend | TypeScript, NestJS, Node.js, REST APIs, RBAC, JWT, webhooks |
| Data | PostgreSQL, Prisma, Redis/BullMQ |
| Cloud and DevOps | Docker, GitHub Actions, Terraform, GCP Cloud Run, Cloud SQL, Secret Manager |
| Frontend | React, Next.js, Tailwind CSS |
| AI tooling | Agent workflows, evaluation pipelines, LLM-assisted automation |