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Maciej Jasiewicz

@jasiewicz

PHP/Laravel engineer and code owner at ONEXO.pl. I deploy what I build, including a Laravel 13 CRM with an HMAC-chained audit log.

Poland

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What I'm looking for

I'm looking for a back-end or full-stack role built around Laravel, where it helps that I can also take work to production. Remote in Poland or hybrid.

I have worked commercially with PHP and Laravel since July 2022. At ONEXO.pl I'm the code owner for the company's repositories: I review and merge every pull request and deploy to production.

The largest system I built there is an internal sales CRM on Laravel 13. It turns a sales agreement into rules the system applies, and it has anonymisation after a retention period, an HMAC-chained audit log verified daily, required 2FA and record-level access.

As a freelancer I built a Laravel device provisioning pipeline for EMS.HOUSE, tested on batches of hundreds of devices in a test environment. I also traced a production DDoS incident to Docker-published ports that bypassed UFW, closed the direct path to the origin and restored stable access.

I write about this work at jasiewicz.pro.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer (Full-Stack)

Current

ONEXO.pl

Jun 2025 - Present (1 year 5 months)

Code owner of the company's repositories: I merge every pull request and deploy to production. Built the team's CRM (Laravel 13, Filament 5, PostgreSQL), which applies a sales agreement's rules and keeps an HMAC-chained audit log verified daily. Client sites in Next.js 16 and React 19. Moved Altholz's order app to its own server; in another client migration I used cPanel.

Current

Freelance Software Engineer

Current

Selected client engagements

Jul 2022 - Present (4 years 4 months)

Occasional commissions alongside my main job. Built a device provisioning system for EMS.HOUSE: a queued batch across three services that undoes finished steps on failure (Laravel 11, Horizon; tested on hundreds of devices, not in production). Found why a client's site behind Cloudflare kept failing under a DDoS. Built a Laravel platform for a YouTube creator, with a Go component.

Laravel Horizon Cloudflare PostgreSQL Redis Docker

Software Engineer / Technical Lead

WEBERRY

Jun 2024 - Nov 2024 (5 months)

Led the technical work in a two-person team, with no people management. Built Laravel 11 back ends with Filament and Octane, put Cloudflare caching in front of the sites and ran 2-3 Linux servers, at the end two on Coolify. Moved apps that were unstable under FrankenPHP to Swoole, accepting slightly lower throughput for stability.

Laravel Filament Octane Cloudflare Swoole Linux

Full-Stack Developer & Linux Admin

WEBERRY

Dec 2023 - Jun 2024 (6 months)

Built and maintained client websites in Next.js with Strapi and looked after the Linux servers they ran on: hardening, Redis and error tracking in Sentry. Built the SkyPass site and set up the Next.js project for IceHost, which I later updated to Next.js 15.

Next.js Linux Redis Sentry Strapi

Junior Full-Stack Developer

ConnectTo Event Solutions

Jul 2022 - Jun 2023 (11 months)

My first developer job, in a team of three developers with a project manager and a designer. Worked on a Laravel 5.8 and MariaDB event platform for business clients: registration, QR code tickets, mailing, organiser panel and CRM integration. Moved the front end from Bootstrap 4 to 5 with modular Sass. Deployments were a manual git pull, which is why I prefer automated ones.

Laravel Bootstrap jQuery SASS MariaDB