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Teknologi & Metodologi

KING403 mengadopsi stack modern yang battle-tested — prioritas: maintainability, security, dan cost efficiency.

Engineering at KING403

Stack Teknologi

Frontend

| Teknologi | Use case | |———–|———-| | React / Next.js | SPA, SSR, dashboard | | Vue / Nuxt | Alternative SPA stack | | TypeScript | Type safety, DX | | Tailwind CSS | Utility-first styling | | Figma | Design handoff |

Backend

| Teknologi | Use case | |———–|———-| | Node.js / Go | API, microservices | | PostgreSQL | Primary relational DB | | Redis | Cache, session, queue | | RabbitMQ / Redis Queue | Async job processing |

Mobile

| Teknologi | Use case | |———–|———-| | React Native | Cross-platform app | | PWA | Lightweight mobile web |

Infrastructure

| Teknologi | Use case | |———–|———-| | Docker | Containerization | | Kubernetes / ECS | Orchestration (scale-dependent) | | Terraform | Infrastructure as Code | | GitHub Actions | CI/CD | | Cloudflare | CDN, WAF, DNS |

Observability

| Tool | Purpose | |——|———| | Prometheus + Grafana | Metrics & dashboards | | Loki / ELK | Log aggregation | | Sentry | Error tracking | | Uptime monitoring | External availability checks |

Prinsip Arsitektur

1. Separation of Concerns

Router → Service → Repository. Business logic tidak bercampur dengan HTTP layer atau SQL.

2. Security by Design

  • Parameterized queries (no SQL injection)
  • Input validation whitelist
  • Secrets via vault/env — never in code
  • Least privilege access

3. Scalability First

  • Stateless application servers
  • Horizontal scaling behind load balancer
  • Cache layer untuk hot path
  • Async queue untuk heavy jobs

4. Observability

  • Structured logging (JSON)
  • Correlation ID per request
  • Alerting on SLO breach

Metodologi Proyek

Kami menggunakan Agile Scrum dengan adaptasi:

Ceremony Frekuensi Durasi
Sprint Planning 2 minggu 2 jam
Daily Standup Harian 15 min
Sprint Review 2 minggu 1 jam
Retrospective 2 minggu 45 min

Definition of Done (DoD)

  • Code reviewed by ≥1 peer
  • Unit test coverage critical path
  • No linter errors
  • Staging deployed & smoke tested
  • Documentation updated
  • Product owner sign-off

Quality Assurance

Automated

  • Unit tests (Jest, Go test)
  • Integration tests (API)
  • E2E tests (Playwright) — critical flows
  • Lighthouse CI — performance regression

Manual

  • Exploratory testing per sprint
  • Cross-browser & device matrix
  • Accessibility spot checks

DevOps & Deployment

Branch Strategy

main (production) ← release/*
develop (staging) ← feature/*, fix/*

Deployment Flow

  1. PR → automated tests
  2. Merge to develop → auto deploy staging
  3. Release branch → QA sign-off
  4. Merge to main → production deploy (blue-green / rolling)

Rollback

  • One-click rollback via previous container image
  • Database migration reversible when possible
  • Runbook documented per service

Keamanan Development

  • Dependency scanning (Dependabot / Snyk)
  • SAST in CI pipeline
  • No secrets in git — pre-commit hooks
  • Annual penetration test (enterprise clients)

R&D & Inovasi

Tim KING403 alokasi 10% waktu engineering untuk:

  • Evaluasi framework & tool baru
  • Proof of concept internal
  • Kontribusi open source (where applicable)
  • Tech talk internal bi-weekly

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