About

Loh Zi Jian

Software engineer based in Malaysia, building across the stack and the infrastructure underneath it.

Full-stack engineer (TypeScript/JavaScript, Python, Dart/Flutter, Go, Java, C#) with infrastructure experience (Docker, Kubernetes, CI/CD, GCP). Currently engineering real-time communication software at a telecommunications software company; previously and currently shipping freelance web work. This site is my build-in-public home: small products, engineering notes, and the documented revival of a long-tested trading strategy.

Experience

Software Engineer — a telecommunications software company

  • Built a cross-platform VoIP softphone app supporting Android, iOS, macOS, and Windows.
  • Hardened production VoIP infrastructure: Kubernetes/Docker hardening, production documentation, observability, and internal knowledge sharing.
  • Designed and built an AI agent runtime exploring multi-agent orchestration with supervisor/handoff patterns.

Freelance Developer — self-employed

  • Built SEO content generation pipelines on WordPress/WooCommerce for a custom apparel printing company in Malaysia.
  • Delivered web tools, automation, and data analysis for various clients.

Management Committee Secretary — a residential community (~320 units)

  • Handles committee administration, meeting minutes, and fee policy execution.
  • Built an internal fee-management platform (FastAPI, PostgreSQL, WhatsApp notifications).

Skills

Languages

TypeScriptJavaScriptPythonDart/FlutterJavaGoC#C++CMATLABMQL5

Infrastructure

DockerKubernetesCI/CDGCPCloudflare (Tunnel, Pages, Zero Trust)

Trading systems

MetaTrader 5 EA developmentIBKR API integrationHummingbot

Product stack

ReactViteFastAPIPostgreSQLTailwind CSSAstro
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