I will debug and fix complex software build and runtime errors

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daniel_lee_dev
D
daniel_lee_dev
Donghyun Lee
debug and fix complex software build and runtime errors
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debug and fix complex software build and runtime errors
Full Screen
debug and fix complex software build and runtime errorsdebug and fix complex software build and runtime errors

About this gig

Build failing? Node.js app crashing? A TypeScript error that keeps returning?

I investigate reproducible software failures and provide evidence-based fixes, not guesswork. My work includes TypeScript/Node.js systems, runtime orchestration, automated verification, and Windows build troubleshooting.

WHAT I CAN HELP WITH

  • TypeScript or JavaScript runtime errors
  • Node.js build and dependency failures
  • Reproducible bugs in existing code
  • Focused fixes, regression checks, and technical handover notes

PACKAGES

Basic: diagnose one issue and deliver findings; no code changes.

Standard: diagnose and patch one agreed issue, with focused validation.

Premium: one agreed repair plus a targeted regression test.

Scope: one repository and one reproducible issue. Please message me with redacted logs, the environment, and reproduction steps before ordering. Complex multi-system problems require a custom offer. No promise of a fix before the issue has been assessed. I do not provide unauthorized access, new features, or ongoing maintenance.

  • Programming language

    • Rust

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Operating systems
    • Databases
    • Source control

  • Frontend framework

    • Next.js
    • React.js
    • React Native

  • Backend framework

    • FastAPI
    • Next.js
    • Node.js
    • Supabase
    • .NET Framework

Get to know Donghyun Lee

Donghyun Lee

Software Developer TypeScript, Electron Debugging

  • FromSouth Korea
  • Member sinceNov 2026

  • Languages

    English, Korean, Japanese, German
I develop and troubleshoot TypeScript/Node.js software and Windows desktop applications, with hands-on work in Electron packaging, runtime orchestration, and automated verification. As the sole developer of a software-engineering agent infrastructure project, I've implemented repository permission checks, checkpoint/rollback workflows, and structured execution evidence. I focus on reproducible root-cause analysis, targeted fixes, and clear validation results for build, installation, and runtime issues.

My Portfolio

Other Software Development Services I Offer

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