🌐 devslab.kr · 📬 support@devslab.kr · 🇰🇷 한국어

$ npx create-saas @devslab/starter
→ Setting up multi-tenant architecture...
→ Configuring auth, billing & permissions...
→ Wiring observability stack...
→ Preparing AI integration layer...
✓ A solid SaaS foundation, ready

We're a small Korea-based studio that builds SaaS products end-to-end — architecture, full-stack & mobile, AI integration in one team. No hype-chasing, no resume-driven design. Only what we have shipped to production.

MVP to enterprise, we own every stage all the way to your first users.

frontend  Next.js · React · Vue · HTMX · TypeScript · Tailwind
mobile    Ionic · Flutter · Capacitor · Kotlin · Jetpack Compose
backend   Node.js · Spring Boot · tRPC · Postgres · Redis · Drizzle
cloud     AWS · Vercel · Cloudflare · CloudType · Supabase
devops    Docker · Grafana · Prometheus · Sentry · Firebase
ai        Anthropic · OpenAI · LangChain · pgvector

Battle-tested in our own SaaS first, then shared on Maven Central under kr.devslab.

• 🛡️ ssrf-guard   — SSRF defense for the JVM. Whitelist + IP-bypass hardening (decimal/hex/octal/IPv6 obfuscation) + redirect re-validation across 9 HTTP-client modules (RestClient · RestTemplate · WebClient · Feign · OkHttp · JDK HttpClient · Apache HttpClient 5). Includes -springai and -langchain4j for LLM-agent tool URL validation — the new SSRF surface for fetch_url-style tools in Spring AI ToolCallback and LangChain4j ToolExecutor agents. Plus GraalVM native-image hints and reactor-netty DNS-time guards for WebClient.
• 🪶 easy-paging-spring-boot-starter   · — Annotation-driven pagination for Spring Boot + MyBatis. Offset (@AutoPaginate) and cursor/keyset (@KeysetPaginate) in one starter. Reactive companion artifact (-reactive) for WebFlux + R2DBC, identical JSON envelope on the wire. Library major matches Spring Boot major (see versioning policy): 4.x targets Spring Boot 4 / Spring Framework 7 / Jackson 3; the 3.x maintenance branch keeps SB 3.3–3.5 supported with security patches.
• 📜 api-log   — Event-driven API logging for Spring Boot, PostgreSQL JSONB storage. Multi-module: api-log-core plus persistence drivers (-jpa, -r2dbc, -mybatis) — all on the same version line. Library major matches the Spring Boot major it targets (see versioning policy).
• 🧪 devslab-examples — Runnable Spring Boot demos for every library above (14 demos: 4 easy-paging SB4 + 4 easy-paging SB3 maintenance + 6 ssrf-guard across HTTP clients and LLM frameworks; bilingual READMEs). Clone, ./gradlew bootRun, curl. Smoke tests included.

$ ./talk-to-the-maintainers

Questions, ideas, sharing your application? Bilingual community in devslab-examples Discussions — same folks who write the libraries.

• XunyaTech — Cybersecurity-first managed IT for growing businesses

$ ./contact --send

• 📬 support@devslab.kr
• 🌐 devslab.kr — available in 14 languages

_{© DevsLab · Built in Seoul}