Gig · from $20
Fix bugs and errors in your Next.js, React, Node.js or Python app
Bug fixing and feature work for Next.js, React, Node.js and Python apps, delivered as clean code that any developer can continue.
- fix bugs
- nodejs
- react bug fix
- python developer
- nextjs developer
Basic
$20
Script
Any type of script to automate a process of work, or debugging of a current project (hourly).
- Delivery
- 1 day
- Revisions
- 2
Standard
$90
Webapp
Server up to 5 APIs and database integration.
- Delivery
- 7 daysor 4 days (+$20)
- Revisions
- 3
Premium
$220
Server
Server up to 9 APIs, database integration or WebSocket implementation.
- Delivery
- 10 daysor 7 days (+$50)
- Revisions
- 5
Before you order: Contact me first so I can help you choose the package that fits your problem.
What you get
- Optimized, well-formatted code
- Code written to current best practice
- Code that any other developer can continue to build on
- Help getting the fixed app live on AWS, Azure or another cloud platform
Who this is for
- Teams with a production bug nobody has managed to track down
- Founders who inherited a codebase and need it working again
- Apps with failing builds, deploys or errors that only appear in production
- Anyone who needs a script, API or small server built or repaired quickly
- Languages
- TypeScript · JavaScript · Python
- Frameworks
- Next.js · React · Node.js
How it works
01
Send the problem
Describe how the software should work, or send the error you're seeing, so I can recommend the right package.
02
Fix and verify
Find the cause, make the change, and check that nearby behaviour still works.
03
Deliver with a clear write-up
Clean code and, on request, documentation or a short video walkthrough of what changed.
Common questions
Can you fix a Next.js hydration error?+
Yes. Hydration errors usually come from the server and the browser rendering different markup, for example dates, random values or browser-only APIs used during render. I reproduce it, find the mismatch and fix it, with a short write-up of the cause.
Do you fix bugs in existing React apps?+
Yes, in existing React and Next.js apps, including code written by someone else. Send the repository or a reproduction and the exact error, and I will confirm the right package.
What do you need from me to start?+
A short description of how the software should work (or the error you're seeing) and access to the relevant code. With that I can recommend the right package.
Can you get the fixed app deployed?+
Yes. I can help you take the code live on AWS, Azure or another cloud platform.
Will you explain what you changed?+
On request I provide documentation, usually as a short video walkthrough, so your team understands what changed and why.
Part of Legacy Code & Debugging. Need something bigger than a package? Custom projects are scoped individually.
Related guides
Guide · 9 min read
eMudhra CA compromise: check whether your servers still trust the bad certificates
Browsers blocked the eight compromised eMudhra intermediates within days, but servers, containers and scripts trust whatever their bundled store says. Tested results for Node.js and Python, a checker that tries the real test chains, and what to update.
Guide · 12 min read
Zeabur, Railway and TiDB Cloud breaches: rotate leaked environment variables in the right order
Three platforms leaked customer secrets in October 2026. What each confirmed, why routine rotation advice keeps leaked keys alive, a script that turns exported variables into a rotation plan, a query that finds planted database objects, and the Zeabur shutdown dates.
Guide · 11 min read
Node2Shell in Python: the Brotli bug (CVE-2026-111497) in requests, aiohttp, pyarrow and Pillow
The Brotli C decoder bug reaches Python through brotli, brotlicffi and copies bundled in pyarrow and Pillow. Fixed versions, tests showing what requests, httpx and aiohttp decode, a checker that finds every copy, and stop-gaps that actually work.
Guide · 12 min read
Node2Shell beyond Node.js: Brotli CVE-2026-111497 in Go, Java, .NET, PHP, Ruby, Linux and proxies
One C decoder, copied everywhere. A single table of every affected component (Node.js, Bun, Electron, Python, Go, Java, .NET, PHP, Ruby, Envoy, curl, Debian, Ubuntu, Alpine, RHEL), its status, how to check it and what to do where there is no fix yet.
Guide · 6 min read
October 2026 security updates: Next.js, Node.js and PHP in one place
Next.js, Node.js and PHP all shipped critical fixes within a week. One table of fixed versions, a two-minute check for each, what to patch first, and the dates coming next.
Guide · 10 min read
Node2Shell: Node.js Brotli decoder vulnerability (CVE-2026-111497), check and patch
An out-of-bounds write in Node.js's Brotli decoder can lead to remote code execution. Fixed versions, a checker that detects the fix in the binary itself, tests showing that Express 5, fetch() and axios decode outside Brotli data, and safe stop-gaps.
Guide · 10 min read
Next.js security update, October 2026: check and patch CVE-2026-96889
Two critical RCEs and a denial of service in Next.js: which apps are affected, a no-dependency script that checks your installed versions and features, the sharp 0.34 trap on Next.js 15, and the upgrade I ran on this site.
Guide · 8 min read
Microsoft Teams webhooks with Workflows: send messages from Node.js
Microsoft 365 connectors are on their way out. How to create a Workflows webhook, the message format it accepts, tested Node.js code with retries, and the limits that bite.
Guide · 9 min read
AWS Lambda cost calculator: estimate your monthly bill
Estimate a Lambda bill from requests, duration and memory, with x86 and Arm prices, the free tier, volume tiers and provisioned concurrency. Checked against AWS's own pricing examples.
Guide · 9 min read
DynamoDB cost calculator: on-demand vs provisioned
Work out read and write units from item size, compare on-demand with provisioned capacity for your traffic, and see when switching saves money. Checked against AWS's pricing example.
Guide · 11 min read
How to store your users' API keys safely in Node.js and MongoDB
If your app saves OpenAI, Anthropic or Stripe keys for your users, a database leak should not leak the keys. Envelope encryption, safe MongoDB reads, redaction and rotation, with tested code.
Guide · 8 min read
Chrome stops running XSLT on November 17, 2026: fix your styled sitemap and RSS feed
Styled sitemaps and feeds will show raw XML in Chrome from version 158. A checker that finds affected files, and two tested Node fixes that keep a readable page.
More gigs
Not sure which package fits?
Describe what you need and I'll recommend one. Free scoping call, clear quote within 48 hours.
Book a call