Skip to content
mj.
plen

Open to new projects

Senior Frontend Developer · Katowice, Poland · remote

Websites, stores and web apps that sell.

I build fast Next.js websites, Shopify stores, WordPress fixes and React apps. 5+ years in product teams, now working directly with your business.

Get a quote ↗All services
Worked with
  • Visuality
  • HexOcean
  • Braintrust
  • nazielono.pro
  • jemWszkole.pl
  • Gainflow

What I can build for you

01 — Services
01

Business websites in Next.js

Fast websites that rank well and that you can edit yourself. Green Core Web Vitals from day one.

Next.jsSEO
from 500 PLN →
02

Shopify stores

Setup, a theme tailored to your brand, fixes and integrations. A store that is ready to sell.

ShopifyLiquid
from 2,500 PLN →
03

WordPress fixes and speed-ups

New sections, bug fixes, migrations and optimisation, without rewriting everything from scratch.

WordPressPHP
120 PLN/h →
04

React web apps

Dashboards, SaaS and MVPs. From a Figma mock-up to a working, tested product.

ReactTypeScript
120 PLN/h →
05

Frontend for Rails teams

Stimulus, Hotwire, ERB and Tailwind. I join your team and ship the UI. It's what I do daily at Visuality.

RailsStimulus
120 PLN/h →
06

Speed and SEO audit

I find what slows your site down and why Google doesn't like it. A prioritised report, plus the fixes.

LighthouseCWV
from 900 PLN →

Selected work

02 — Case studies
nazielono.pro home page on desktopnazielono.pro · Feb 2025 → maintenance

A digital marketing agency website in Next.js and Sanity instead of WordPress

0.6 sRead →
School admin panel in jemWszkole.pljemWszkole.pl · Feb 2025 → frontend support

A school canteen platform: from MVP to a modern app without a full rewrite

ViteRead →
Braintrust talent dashboardBraintrust × HexOcean · Jun 2021 → Dec 2024

A Web3 talent marketplace with a 50-engineer team

3.5 YEARSRead →

Got a similar project? Tell me about it and I'll reply within 24 hours.

Send a brief ↗All work

How we work

03 — Process
  1. 01

    Brief

    A 3-minute form or a 20-minute call. I learn the goal, not just the feature list.

  2. 02

    Quote and plan

    Within 48 h you get the scope, price and timeline. No hidden costs.

  3. 03

    Build

    A live preview every week. You see progress and can comment as we go.

  4. 04

    Launch

    Deployment, domain, analytics, Search Console. Training on editing content.

  5. 05

    Care

    Fixes, updates and new features. A monthly plan or hourly billing.

04 — Testimonials
„Michał consistently demonstrated his ability to handle complex projects independently, including successfully rewriting an entire system to adopt a modern tech stack.”
Daniel Kowalczyk · Co-founder, HexOcean · my direct supervisor for nearly 4 years · LinkedIn recommendation ↗1/4

Clear pricing

05 — Pricing
Quick start

Landing page

from 500 PLN

  • — 1 page, up to 6 sections
  • — from your ready design
  • — responsive, basic SEO
  • — launch + 1 round of fixes
Ask for a quote ↗
For small businesses

Business website with CMS

from 2,900 PLN

  • — up to 5 pages
  • — editable CMS
  • — SEO and structured data
  • — launch + 30 days support
Ask for a quote ↗
Most popular

Shopify store

from 2,500 PLN

  • — theme tailored to your brand
  • — payments and shipping
  • — product import
  • — admin training
Ask for a quote ↗
Support, teams, agencies

Hourly engagement

120 PLN/h

  • — changes in WordPress, Next.js, Shopify
  • — React, Next.js, Rails frontend
  • — trial task: up to 10 h at 100 PLN/h
  • — billed per 15 min, time report
Ask for a quote ↗
06 — FAQ

Common questions

How much does a website cost?

A simple landing page built from your ready design starts from 500 PLN net, and a business website with a CMS from 2,900 PLN net. You get an exact quote after a short brief. The price depends on the number of pages, integrations and whether the content is ready.

How long does it take?

A landing page usually takes a few days, a business website with a CMS 2–3 weeks, a Shopify store 3–5 weeks. On longer projects you get a live preview every week.

How do we start on a bigger project?

With a trial task: up to 10 hours of work at 100 PLN/h net, with no commitment. If it works well, we continue at 120 PLN/h net or at a fixed project price.

Can I edit the content myself?

Yes. I connect a friendly CMS or the Shopify/WordPress admin and show you how to use it.

Do you work with companies outside Poland?

Yes. I work remotely with clients across Poland, the EU and the UK, and I'm happy to meet in person in Silesia.

Do you take care of SEO?

Yes. Every site ships with correct metadata, structured data, a sitemap and good Core Web Vitals from day one.

Do you issue VAT invoices?

Yes. I run a sole-trader business in Poland and issue VAT invoices, so B2B works out of the box. For Polish clients I can also work on a contract for specific work or a mandate contract.

07 — Contact

Let's build it.

A short brief takes 3 minutes. I'll reply within 24 hours with a rough quote and timeline.

Send a brief ↗e-mail