Maciej Jasiewicz
From: Poland
Location: Gliwice, PL
On Useme since 3 March 2023
About me
I work on the websites, shops and internal systems a company relies on day to day, and I stay on after launch. People usually come to me with one of these:
- A project left by someone else. I moved the Altholz order app from another developer's prototype to the client's server and fixed its security problems. I took over and maintained the Summer Club shop after the previous contractor.
- A process the system should enforce. In the ONEXO CRM, deadlines and commissions from the agreement are calculated by the software.
- A server problem or an attack. I found why a site behind Cloudflare kept failing under attack and closed that path.
- A new site or shop. I built the Kozie Frykasy shop from scratch on WordPress.
Before I quote, I look at what you already have. When we finish, you get a note of what changed and what is still open. My day job is at ONEXO.pl. Tools: PHP and Laravel, Next.js, WordPress, Linux, Cloudflare.
Categories
CV / Résumé
Jun 2025 - Now
Software Engineer (Full-Stack, Web Systems)
ONEXO.pl
Responsible for the team's code and deployments; every change goes through me. Built a CRM that calculates deadlines and commissions from the agreement and keeps an HMAC-chained audit log. Moved the Altholz order app to the client's server.
Jun 2024 - Nov 2024
Software Engineer / Technical Lead
WEBERRY
Led the technical work in a two-person team. Laravel 11 back ends, Cloudflare caching, Linux servers on Coolify. Moved unstable apps from FrankenPHP to Swoole.
Dec 2023 - Jun 2024
Full-Stack Developer & Linux Administrator
WEBERRY
Next.js sites with Strapi and the Linux servers behind them, with errors collected in Sentry. Built the SkyPass site and set up the Next.js project for IceHost.
Jul 2022 - Now
Freelance Software Engineer
Zlecenia własne (freelance)
Commissions built around a specific problem: device setup system for EMS.HOUSE (tested on batches of hundreds of devices in a test environment), finding why a site failed under a DDoS.
Jul 2022 - Jun 2023
Junior Full-Stack Developer
ConnectTo Event Solutions
Event platform in Laravel 5.8 for business clients: registration, QR code tickets, mailing, organiser panel, integration with the company CRM.
Portfolio
Website for Meblokos, built entirely by me at ONEXO.
Website for an organizer of school trips and company outings. Built at ONEXO with Next.js, entirely by me. The link points to the pre-launch version.
CRM ONEXO
A sales agreement written into the system's rules: it counts client protection periods and commissions, locks statements once published, anonymises stale leads and keeps an audit log. Laravel 13, Filament 5.
The isosserwis.pl website from the first conversation with the client to the finished site: I agreed the scope, prepared the design and built it.
The ONEXO website, built together with a teammate. I coordinated the work with the UI/UX designer.
Website in Polish, English and Hungarian for a producer of granulated calcium fertilizers selling across Europe. Built at ONEXO with Next.js; I built the current version.
Website built at WEBERRY in 2024 with Next.js and Strapi, where content can be edited without a developer.
Online shop on WordPress and WooCommerce that I built from scratch at ONEXO.
WooCommerce shop taken over from the previous contractor. I maintained it and fixed issues.
Altholz, aplikacja zamówień
Took over another developer's prototype and moved it from Cloudflare Workers to the client's server (Next.js, MariaDB). Orders and stock are saved together. The client got a change report. In use.