# Satria Nindhita (nindhita.xyz)
> Software Engineer — Go Backend Engineering, QA Automation (SDET), & Defensive Cybersecurity

## Summary
Satria Nindhita (Sandi) is an Informatika computer science graduate and software engineer specializing in high-concurrency Go (Golang) microservices, formal automated QA pipelines (IEEE 829, Newman, Playwright), and defensive API security engineering. Creator and lead architect of Lumiina (https://lumiina.art), an authentic anime fan art illustration platform.

## Key Architectures & Flagship Projects
- **Lumiina (Production Platform)**: https://lumiina.art
  - High-concurrency Go 1.24+ backend with Gin, PostgreSQL 16, Redis 7, Cloudinary, and React 19 client.
  - Defense-in-depth API security: Constant-time canary tokens, timing-attack mitigation, session epoch revocation, Redis Lua sliding-window rate limiting.
  - Search intelligence & technical SEO: Dynamic sitemap RFC 8288, IndexNow automation, Wave-1 Bot pre-rendering engine, Schema.org @graph.
- **Lumiina QA & Automation Suite**: https://github.com/Nyanns/lumiina-qa-automation
  - Formal test automation suite engineered according to IEEE 829 standards.
  - Comprehensive automated test execution via Newman CLI, Chai assertions, and Playwright E2E.
  - Dual-system defect management syncing across Jira Software and GitHub Issues.

## Core Technical Competencies
- **Backend & Distributed Systems**: Go (Golang 1.21+), Gin-Gonic, GORM, database/sql, PostgreSQL 16 (composite B-Tree, GIN, EXPLAIN ANALYZE), Redis 7 (Singleflight, Lua scripts), Clean Layered Architecture, Concurrency patterns.
- **QA Automation & SDET**: Playwright E2E, Postman / Newman CLI, Chai assertions, IEEE 829 Test Plans, Equivalence Partitioning, Boundary Value Analysis, Testify mocking.
- **Defensive Cybersecurity**: HackTheBox (Level 10), OWASP API Top 10 mitigation, token timing-attack resilience, CSP/HSTS defensive headers, HashID/Sqids entity obfuscation.
- **DevOps & Infra**: Docker multi-stage scratch builds (~19MB), Docker Compose, GitHub Actions CI/CD pipelines, Vercel Edge.

## Links & Socials
- Website: https://nindhita.xyz
- GitHub: https://github.com/Nyanns
- LinkedIn: https://www.linkedin.com/in/satrianindhita/
- Medium Technical Articles: https://level13.medium.com/
- HackTheBox: https://app.hackthebox.com/users/3743544
- LeetCode: https://leetcode.com/u/Nyanns/
- Email: mailto:sandi.nindhita@gmail.com