Alexandr Sopilnik
I Build Apps and Fix Broken & AI‑Built Ones | TypeScript, React, Rust
If your backend is slow, broken, or was generated by AI and nobody can maintain it, I can fix it.
Services
Websites and web apps from $80
A website that works on phones, tablets and desktops, loads fast and belongs to you afterwards. I design the interface and code it by hand in React or Next.js, and when the site needs a backend I write that too, on Node.js or in Rust. It ships to your repository and your hosting, in your accounts. No builder lock-in and no monthly fee to me.
- At the starting price
- One page, a landing or a business card, responsive, with your content, deployed and live.
- Larger
- Additional pages, forms, an admin panel, a database and more.
Bug fixes in JavaScript, React, Node.js and Next.js from $25
Something in your project broke or got slower, and I fix it with an explanation of what went wrong. I reproduce the bug, find the cause, fix it and write down what changed and how I checked it. The fix arrives as a pull request, a patch or a change on the live site, whichever suits you. This includes projects someone else started.
- At the starting price
- One reproducible bug found, fixed and explained.
- Larger
- More bugs with a written summary and a list of other problems I noticed.
Speeding up React and Next.js apps from $75
Your app got slower one release at a time. I measure which problems actually cost your users time, then fix them. You get LCP, CLS, INP and bundle size per route, measured before and after on the same throttled connection, in one table. Work happens on a branch in your repository, commit by commit.
- At the starting price
- An audit of the page, then the fixes that move those numbers.
- Larger
- More routes, rendering and caching tuned, and a bundle budget in CI so the next release cannot quietly undo the work.
Backend services and APIs in Rust from $50
A REST API on axum, a worker that processes files or a queue, or a service that sits between your system and someone else's API. Every service comes with tests, a README and the source in your repository.
- At the starting price
- One service with up to three REST endpoints, or one worker reading files or a queue you already run.
- Larger
- More endpoints with PostgreSQL, token auth with roles, a background worker, Docker and a CI workflow that builds and tests on every push.
Desktop applications for Windows, macOS and Linux from $120
A desktop application is the right answer when the work happens on the machine and not in a browser: files that never leave the office, a tool the team opens every morning, a window that keeps working when the connection does not. I build them in Rust with the interface in Tauri.
- At the starting price
- One application with up to three screens for the platform you name, a running build early in the project, and the source in your repository.
- Larger
- Builds for all three systems, a local database with search, CSV or Excel import and export, automatic updates and installers.
WordPress and WooCommerce sites from $25
New WordPress sites and WooCommerce stores, and work on the ones you already have. I build custom themes from your design or a site you like, set up WooCommerce with the checkout your customers need, and keep the admin simple enough that your team adds pages and products without calling a developer. On existing sites I fix what broke after an update, speed up slow pages and checkouts, and rebuild pages that became hard to edit.
- At the starting price
- One reproducible problem on your WordPress site found, fixed and explained.
- Larger
- A new site or store built from your design, with WooCommerce, forms and the pages you need, deployed to your hosting.
Public work
reqwest-rotate
Proxy and rate-limit rotation for reqwest.
How I work
- In writing and asynchronously. No calls.
- A short written update at the end of every working day.
- A fixed price when the work can be specified; hourly while its shape is still unclear.
