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Kamil Marczak
Open to new projectsFull-stack developerWrocław, PL ·

KamilMarczak.

I build fast, polished web and mobile apps, from the database schema to the last pixel. By day at Alergeek Ventures, after hours on RozliczKorki and Solvro Planer, used by thousands of WUST students.

See my workDownload CV
Portrait of Kamil Marczak
NowWeb developer at Alergeek Ventures
420k
Solvro Planer page views
8
stores and websites built for clients
3.4k+
npm downloads of my Better Auth plugins
4yrs
of writing TypeScript daily
Next.jsReactTypeScriptExpoReact NativeBetter AuthtRPCDrizzlePostgreSQLStripePayload CMSMongoDBRedisDockerCoolifyTailwind CSSThree.jsElixirKotlinJetpack Compose

Portfolio · 15

Selected work

From a class scheduler used by thousands of WUST students to my own tutoring app on iOS, Android and the web. Open a project for the details.

rozliczkorki.pl
RozliczKorki screenshot

Web & mobile appiOS · Android · web

RozliczKorki

A free, open-source app for tutors on the web, iOS and Android that tracks lessons, payments and earnings.

  • Next.js
  • Expo
  • tRPC
  • Better Auth
  • Drizzle
planer.solvro.pl
Solvro Planer screenshot

Web appKN Solvro420k views

Solvro Planer

Planer helps WUST students build their class schedule without juggling groups by hand in USOS.

  • Next.js
  • AdonisJS
  • Better Auth
  • MCP
  • Coolify
racing-pwr.pl
PWR Racing Team screenshot

Website + CMSKN Solvro

PWR Racing Team

The official website of PWR Racing Team, the Formula Student team of Wrocław University of Science and Technology.

  • Next.js
  • Payload CMS
  • Three.js
  • next-intl
hackerium.io
hackerium.io screenshot

SaaS platform

hackerium.io

Hackerium automates black-box penetration testing with a focus on web applications.

  • Next.js
  • Stripe
  • Bash

More projects

11

About

Studying at WUST. Shipping to production.

I study Applied Computer Science at Wrocław University of Science and Technology. I am most at home in Next.js and TypeScript, but I like owning the whole stack: databases, auth, Stripe payments and deployments on Coolify. I also write open source: two Better Auth plugins and fixes in projects such as JellyCine and Zen Internet. Off the keyboard: outdoor sports and Formula 1.

Skills

  • Next.jsExpertSSR, SSG and PPR, server actions, middleware, optimisation
  • ReactExpertcustom hooks, Context API, Three.js, 100k+ line codebases
  • TypeScriptProficientgeneric and recursive types, type performance
  • React Native & ExpoProficientiOS and Android apps, widgets, Live Activities, store releases from CI
  • Android & Wear OSProficientKotlin, Jetpack Compose, Material 3 Expressive, Glance widgets, tiles
  • Better AuthProficientauthor of two plugins listed in the official docs, OAuth, passkeys
  • StripeProficientcarts, webhooks, subscriptions, custom checkout
  • DatabasesProficientPostgreSQL, MongoDB, MySQL, Redis, vector search
  • Docker & CoolifyProficientdocker compose, auto-deploys from GitHub, preview deploys

Experience

  1. present

    Alergeek Ventures

    Web developer

    A Kraków product studio that builds for early-stage startups. Besides client work, I am the top contributor to Manfrod, the team’s AI agent on Slack, written in Elixir and Phoenix.

  2. present

    KN Solvro

    CTO · previously Vice-head of Frontend

    Top contributor to Planer, the club’s flagship project. I also built parts of HRownik, the club’s member management system, and the PWR Racing Team website.

  3. 10/2024 – present

    Wrocław University of Science and Technology

    Applied Computer Science

    On campus I am part of KN Solvro.

  4. 05/2024 – 04/2025

    hackerium.io

    Full-stack developer

    Built the whole site from scratch for a platform that automates penetration tests for pentesters.

  5. 01/2022 – 05/2024

    IslandHouse

    Full-stack developer · freelance

    3 online stores and 5 portfolio sites for clients, built with Next.js and Stripe.

GitHub · @qamarq

2094 contributions in the last 12 months

Including 510 in private repositories. On GitHub since 2021.

GitHub profile
1,084
commits
391
pull requests
237
active days out of 368
22 days
longest streak, still going
Record: 43 contributions · July 16, 2026 · GitHub API data, refreshed hourly

Contact

Got an idea?Let’s talk.

Happy to talk about a new project, a collaboration or an internship.

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