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ERP & Electronic Tax Invoice System

Backend Developer (Freelance) · August 2025 – January 2026 · Remote

Evidence

Accomplished high-throughput ERP processing as measured by 2,000+ concurrent requests, 1M+ rows/file, and 90% memory optimization, by doing stream-based Excel processing with Elysia.js.

Constraint

Engineered a high-throughput ERP backend handling 2,000+ concurrent requests using Elysia.js.

Decision

Built an Excel processing pipeline parsing 1M+ rows/file with 90% memory optimization via stream-based processing.

  • Engineered a high-throughput ERP backend handling 2,000+ concurrent requests using Elysia.js.
  • Built an Excel processing pipeline parsing 1M+ rows/file with 90% memory optimization via stream-based processing.
  • Implemented type-safe REST APIs with 100% data validation across ERP modules using TypeScript and Prisma ORM.

Failure modes

    Result

    Implemented type-safe REST APIs with 100% data validation across ERP modules using TypeScript and Prisma ORM.