Frontend Developer · React · Next.js · TypeScript
At the Profitway agency I take client projects from the first commit to release: interface, CMS back end, integrations, servers and domains. Mostly Next.js, Shopify and WooCommerce, in an AI-assisted workflow I help build for the whole team.
Based in Poland, working remotely
01 · Work
Client and in-house projects I've owned at the Profitway agency, from the first commit to production and maintenance.
Lead generation · Automotive
Test-drive campaign panel for an Audi, Volkswagen and Porsche dealer group
Users build campaign links with UTM parameters and printable QR codes from a city, dealership, model and route matrix. Leads arrive with full context and go to email and the CRM, with a separate admin role and a daily fleet sync from the client's API.
Internal tool · Profitway
The agency's internal system
A team panel built from scratch, with Google sign-in limited to company accounts and a session shared across subdomains. It holds the full brand book, an email signature generator, job postings with a public JSON feed and a directory wired to Google Workspace.
Company website · Profitway
The agency's website in Next.js
Built from the ground up: service pages generated from one shared source, a blog, Polish and English versions, SMTP forms protected by a honeypot, and first- and last-touch UTM attribution.
WordPress + WooCommerce · Hospitality
Site and store rebuilt from scratch
A custom theme built from Figma, events modelled as custom post types with ACF, and the store's back end moved into a custom plugin for analytics, consent and lead capture. Paynow checkout and a server migration with every old URL redirected.
Shopify · Cosmetics
One store, three markets
Theme work from Figma for a store selling across the EU, the US and Latvia: mega menu, product quiz, free-shipping progress bar, Judge.me reviews and a lazy-loaded background video, plus a localisation audit run with my own scripts.
Shopify · Fashion
Store rebuild and EU compliance
A redesign on a new theme with grouped variants and a sticky add-to-cart, plus the withdrawal button required by EU Directive 2023/2673. I also traced a Baselinker–Fakturownia integration that had blocked month-end accounting for months to an expired token, and backfilled the missing invoices.
WordPress · Construction
Company website, visible to language models
A custom theme built from Figma for 320–1920 px, content on custom post types with ACF, and a custom plugin for forms. Complete schema.org data validated without errors, an llms.txt file and an AI bot access policy, plus automatic deletion of old submissions in line with the privacy policy.
02 · Projects
What I build outside client work, and where I started.
Side project · 2026
A mobile-first web app for playing Mafia around a real table. Players join a room from their phones, the host runs the night and day phases, and every role, night action and vote stays in sync in real time.
Lobby
Night
Day
Night and day repeat until the town or the mafia wins.
From the Mate Academy course and the CoderBros internship, 2024–2025.
Built during the CoderBros internship and later used as the template for new catalogues. Filtering, sorting and pagination kept in the URL, so every search can be shared; cart and favourites persist between visits.
React · TypeScript · SCSS Modules · React Router
Full CRUD over a REST API, with loading and error states for every request and optimistic updates.
React · TypeScript · REST API
Posts and comments browser on Redux Toolkit, with async thunks and memoised selectors.
React · TypeScript · Redux Toolkit
Sortable table with an add-employee form and validation, written with plain DOM APIs and no framework.
JavaScript · DOM API · SCSS
The sliding-tile puzzle with class-based game logic in plain JavaScript.
JavaScript · OOP
Responsive landing page built from a Figma design, with SCSS and BEM.
HTML · SCSS · BEM
03 · Approach
The standards I bring to every project, whatever the stack.
No layout shift, WebP images, lazy loading and a deliberate rendering strategy, checked from 320 to 1920 px on every release.
Semantic HTML, keyboard support and WCAG checks as part of the job, not a pass at the end.
Every project in Git, WordPress and Shopify included: feature branches, pull requests, commit conventions and webhook deploys.
Domains, DNS records, SSL, environment variables, Docker and EasyPanel. I set up what I ship.
Claude Code and Cursor every day, plus custom MCP servers that give the whole team project context inside their AI tools.
04 · About
Before frontend I studied hydrogeology and engineering geology at AGH University of Krakow. The analytical habit stayed with me: I like to measure before and after, which is why most of my case studies come with numbers.
I moved into programming through Mate Academy's frontend course and an internship at CoderBros, and since 2025 I've been building for clients at Profitway. Now I'm growing toward full-stack JavaScript, and Mafia IRL is where I practise the back-end half.
2025 – now
Frontend Developer
Profitway
2024 – 2025
Frontend Developer, internship
CoderBros
2024 – 2025
Frontend course, 700+ hours
Mate Academy
2016 – 2021
MSc, Hydrogeology and Engineering Geology
AGH University of Krakow
05 · Contact
Looking for a frontend developer who can take a project all the way to production? Use the form or write to me directly.
kontakt@mateuszcieplak.com