~ whoami

Dawid Olszewski Software Engineer

applying for: Agentic Product Engineer · Saily
›
basedCracow (Poland) → remote
exp7 yrs · AI-native
focusGo · PHP · Kubernetes · LLM tooling · MCP
dawid [at] olszewski [dot] dev /in/dawid-olszewski brief.md
Built for Saily
Travel Data Copilot
Live · PoC
AI recommends the right Saily eSIM data plan in 30 seconds — based on destination, trip length, usage style and devices. Public admin/analytics dashboard exposed too — top destinations, AI cost/latency, feedback loop.
ReactGoDockerGoogle CloudLLM API
Try it → travel-data-copilot.olszewski.dev Admin dashboard → /admin
Saily pricing is mocked — proof of concept built specifically for this application.
~/about.md

AI-native backend engineer based in Kraków with ~7 years shipping production systems — primary stack Go now, with deep PHP/Drupal background before that. I treat LLM tooling (Claude Code, Codex, MCP servers, agents) as part of my stack, not a side experiment.

At AlohaCamp I work across 20+ Go microservices on Kubernetes — fixing, building, shipping, owning whatever piece of the system needs me. We speak gRPC, persist in MongoDB and MySQL. Currently I'm rolling out an internal MCP server that hooks AI agents into our actual codebase so the team can debug and develop with real context, not just public docs. Daily user of Claude Code and Codex for refactors, debugging and unfamiliar-code spelunking — looking for what genuinely cuts toil.

Before AlohaCamp I spent 5+ years in Drupal — created CKEditor 5 Plugin Pack from scratch and co-maintain CKEditor 5 Premium Features, the modules that bring CKEditor 5's full and premium capabilities into Drupal sites worldwide. I like small services that do one thing, readable logs, and tests that mean something. I don't care about frameworks with personality.

~/stack.sh
Go
2 yrs · primary stack now
Production microservices built on go-kit, gRPC tooling, internal MCP server. Full-time since 10/2024, plus freelance overlap from mid-2024.
PHP
7 yrs · Laravel / Symfony / Drupal
From legacy CMS to domain-heavy services. Maintain several Drupal CKEditor 5 modules used across the ecosystem.
Kubernetes
~2 yrs · 20+ services
Daily target environment — deploys, debugging across the cluster, full ownership of releases.
AI / LLM infra
2 yrs · applied
Rolling out an MCP server for internal usage that bridges our docs to AI agents. Building Claude Code plugins for the team's day-to-day dev workflow. Completed AI_devs v3 — Agents Reloaded: hands-on training on building agents with knowledge bases.
JavaScript / TypeScript
occasional · ~3 yrs exposure
Working knowledge from professional contexts — bug fixes, integrations, the occasional React feature when a project needs it. Not my primary lane, but I'll happily ship a small frontend if it unblocks the work.
~/experience.log
10/2024 — present · joined as freelancer 06/2024
Software Engineer (Backend) at AlohaCamp
Backend across 20+ microservices on a niche booking platform for camping & glamping. Build new services, debug, ship features, own deploys end-to-end. Currently rolling out an internal MCP server bringing AI-assisted debugging into the team's daily workflow.
GoPHP / LaravelKubernetesgRPCMongoDBMySQLMCP
12/2022 — 09/2024
Software Engineer / Drupal at CKSource
Owned the Drupal CKEditor 5 ecosystem. Created and maintained the CKEditor 5 Plugin Pack module from scratch; co-maintained CKEditor 5 Premium Features (premium CKEditor capabilities for Drupal) and CKEditor LTS.
PHPDrupalCKEditor 5
01/2021 — 04/2022
Software Engineer at VMLY&R
Drupal/Symfony engineer at the global digital agency, Kraków office. Built custom modules for a large multilingual multisite for one global brand, plus an internal product-management CRM. Symfony for internal tooling, occasional Python.
PHPDrupalSymfonyPython
01/2019 — 12/2020 · returned as freelancer in 2022
Back-end Developer at Quantoo
First proper backend role at a Polish software house. Lead developer on a Drupal site for a major Polish courier; rotated through ~6 other Symfony / Zend / Drupal / WordPress projects. Where I learned production deploys and debugging in the deep end.
PHPDrupalSymfonyZendMySQL
~/projects.json
SocialArx
In development · Landing live
Social media management SaaS — scheduling, multi-account, AI-assisted post editing. I own backend & DevOps; FE/mobile by another engineer. I built the React admin dashboard for API testing.
LaravelGoReactAWSStripeMeta / TikTok APIs
Visit landing → socialarx.com
WeldPortal
Sunset
Niche job board for the welding industry — "JustJoin.IT for welders". Built end-to-end: employer–candidate matching, Stripe payments, transactional email, analytics, custom CMS.
LaravelVueStripeMySQL
Open employer dashboard demo → weldportal.olszewski.dev
Closed after market validation showed limited demand and team capacity ran out — kill decision rather than zombie maintenance. Demo preserved as a snapshot.
IQCS
Prototype
CAD viewer + technical documentation generator for welding. Prototype — didn't go to production, but seeded the WeldPortal idea.
PHPLaravelCAD viewer
Open → iqcs.olszewski.dev
~/product-playbook.md

Beyond writing code — what I bring to building products end-to-end. Stuff I've actually wired into the side projects above:

PostHog Amplitude Stripe HubSpot n8n automations transactional email Meta / TikTok APIs Cloudflare GCP / AWS deploys analytics setup custom admin dashboards
~/open-source.yml
CKEditor 5 Plugin Pack
Creator & maintainer·drupal.org
DRUPAL
CKEditor 5 Premium Features
Maintainer·drupal.org
DRUPAL
CKEditor LTS
Maintainer·drupal.org
DRUPAL