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Open to backend / LLM roles
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Open to backend / LLM roles
5 followers · 13 following
  • Taipei, Taiwan
  • 18:11 (UTC +08:00)

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justinhsu1477/README.md

👋 Hi, I'm Justin Hsu

Backend engineer focused on Java / Spring Boot and production LLM systems.

Years on the JVM doing the unglamorous architecture work — concurrency, JPA, idempotent APIs, multi-module gateway design. I apply the same discipline to AI products: streaming pipelines, multi-tenant permissions, RAG that doesn't hallucinate prod data, and trading systems that survive real markets.

GitHub LinkedIn Email

⚙️ Stack

  • Backend: Java 17 / Spring Boot 3, PostgreSQL, Redis
  • LLM: Spring AI, AWS Bedrock, pgvector RAG, SSE streaming, Python (agents & eval)
  • Infra: Docker, Kubernetes, GitHub Actions, multi-repo gateway architectures

Tech stack icons

🚀 Currently working on

  • Production LLM infra on a multi-service AI BI platform — per-tenant model routing, column-level access enforcement, SSE streaming
  • crypto-signal-trader — turning noisy Discord trading signals into auditable trades with an LLM eval harness

📊 GitHub Stats

GitHub Stats Top Languages

📌 Projects

See pinned repositories below.

Pinned Loading

  1. crypto-signal-trader crypto-signal-trader Public

    Automated crypto futures trading system — Spring Boot + RabbitMQ + WebSocket + Neon PostgreSQL. Multi-user signal broadcast, triple-layer deduplication, fail-safe mechanism, LINE/Discord notificati…

    Java 1

  2. Pet Pet Public

    Full-stack pet care platform — Spring Boot + Spring Security JWT + Android (Retrofit + OkHttp). Sitter booking, LINE Pay, Google Maps, real-time chat.

    Java 1 1

  3. ai-dev-workflow ai-dev-workflow Public

    Azure DevOps CI/CD middleware — Spring Boot + Claude API. Auto-analyzes test failures, generates unit tests, and suggests bug fixes in PR comments.

    Java

  4. attestly attestly Public

    Java-native memory layer for AI agents — Spring Boot Starter with audit trail, MCP-native for Claude Desktop / Cursor

    Kotlin