I will audit your web app for security vulnerabilities and fix them

N
noahsackville
N
noahsackville
Noah S
audit your web app for security vulnerabilities and fix them
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audit your web app for security vulnerabilities and fix them

About this gig

Here's the description paste it in:

I audit Node.js, Next.js and API backends for real security vulnerabilities broken access control, IDOR, PII exposure, missing rate limiting, injection, and authentication flaws. You get a clear, prioritised report (Critical to Low) with the exact file and line for each issue and a concrete fix.

What I check:

  • Authentication and session handling
  • Access control and IDOR (can users reach data that is not theirs?)
  • PII and sensitive data exposure
  • Injection, unsafe input handling, and insecure defaults
  • Rate limiting and abuse protection

This is a genuine manual review by a developer, not an automated scanner dump. I have audited regulated production platforms and caught live access-control and data-exposure bugs before they shipped.

Message me with your stack before ordering so I can scope it accurately.

  • Programming language

    • JavaScript

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases
    • Testing procedures

  • Frontend framework

    • Next.js
    • React.js
    • Svelte
    • Tailwind CSS
    • Vue.js

  • Backend framework

    • Express.js
    • FastAPI
    • NestJS
    • Next.js
    • Node.js

  • AI & low/no code builders

    • Cursor

Get to know Noah S

Noah S

Full Stack Developer for Web Apps and Web Scraping

  • FromAustralia
  • Member sinceMay 2016
  • Avg. response time1 hour

  • Languages

    English
I am a full-stack developer specializing in Next.js, React, Node.js, TypeScript, Prisma and PostgreSQL. I build production web apps, SaaS platforms, web scrapers and data pipelines, and I audit existing apps for security and performance issues. I work git-based with clean, well-documented commits, and I care about shipping correct, maintainable code rather than quick fixes. Fast communication, honest scoping, and nothing marked done until it actually works.

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