Contracting at ABOUT YOU · open to conversations
Senior Frontend Engineer Full-Stack Contractor
Ten years of React in production. I take on frontends that have to hold up — large monorepos, real traffic, and teams that need a system rather than a patch.
The ledger
Every engagement since 2014 — the product, what was delivered, and the stack it ran on. Pick one to read the detail.
Senior Frontend Engineer · Contract · Remote · aboutyou.de
Customer-facing features in a large-scale React/TypeScript e-commerce monorepo powering the mobile and desktop web shops, with a gRPC data layer and container/presentational package architecture.
Stack React · TypeScript · Monorepo (Yarn workspaces) · Linaria · React Query · Zustand · gRPC · Storybook · Jest · RTL · Cypress · GitLab CI
Fullstack Developer · Contract · Remote · meingpt.com
An enterprise-grade, privacy-focused AI platform with RAG capabilities and multi-LLM support.
Stack TypeScript · React · NestJS · TRPC · Prisma · PostgreSQL · Playwright · RAG · OpenAI API · Kubernetes
Frontend Lead · Contract · Remote · mehrwerk.de
Four years leading frontend for a loyalty and benefits platform, run alongside parallel contracts.
Stack TypeScript · React · Ionic · React Native · Next.js · Node.js · Kotlin · GraphQL · MongoDB · Jest · Cypress · AWS · k6
Senior React Developer · Contract · Remote · kijijiautos.ca
Dealer retail team on Kijiji Autos, Canada’s largest online auto platform.
Stack React · TypeScript · ESLint · Jest · TestCafe · AWS
Senior React Developer · Contract · Remote · future.smart.com
The smart IAA landing page for the brand’s future product reveal.
Stack React · TypeScript · Styled Components · Webpack · AEM · Jest
Senior React Developer · Contract · Remote · lemon.markets
Blog and CMS surfaces for a fintech brokerage API product.
Stack React · Next.js · TypeScript · Prismic · ESLint · Jest
Senior React Developer · Contract · Remote
White Label Dealer Search, shipped across two automotive brands.
Stack React · TypeScript · Styled Components · Webpack · Jest
Senior React Developer · Contract · Remote · factor-eleven.de
AdManager platform and the component ecosystem around it.
Stack React · GraphQL · Apollo · Jest · Enzyme · Cypress · SASS · CSS Modules · Webpack · GitLab
Senior React Developer · Contract · Berlin · tooltime.de
Field service management for tradespeople.
Stack TypeScript · React · GraphQL · Apollo · Jest · Cypress · CircleCI · AWS
Senior Software Developer · Full-time · Berlin · careem.com
Corporate customers department at the Middle East’s largest ride-hailing platform.
Stack React · React Native · Redux · Saga · TypeScript · Jest · Cypress · Webpack · Kotlin · Scala · MySQL · AWS · Docker · Jenkins
Frontend Developer · Full-time · Berlin · circula.com
Expense management for accountants and supervisors.
Stack React · Redux · Ruby on Rails · RSpec · Docker
Full Stack Developer · Full-time · Stuttgart · gastroguide.de
Seven products for restaurants, built end to end.
Stack React · Redux · Flux · PHP · MySQL · AWS
Full Stack Developer · Full-time · Lviv, UA · cma.ua
Where it started — e-commerce plugin work.
Stack Magento · PHP
Selected work
Six engagements where the outcome is easy to state. The rest are in the ledger.
Delivered the Status Program end-to-end inside the Coins wallet on a 30M+ MAU e-commerce platform — gRPC client integration, deep-linked routing, mobile and desktop views. Extended the A/B testing infrastructure with server-side experiment activation and hardened the GA4-scale analytics layer against duplicate events.
Led a team of five and architected a React application framework that turned a four-month bespoke onboarding into a half-hour configuration. Built the UI Editor that pushes real-time content across web and native for 1M+ monthly active users.
A white-label Dealer Search built for Volkswagen, then integrated into Audi as a micro-frontend rather than a fork. Runs on Audi.de across more than ninety markets.
Shared assistants and chat workflows for a privacy-focused enterprise AI platform with RAG and multi-LLM support — plus the unglamorous half: TRPC/Prisma endpoints for organization hierarchies, RBAC and Stripe subscriptions.
Designed and owned the full k6 suite — smoke, stress, soak and spike — against SSR and GraphQL services, reported through Grafana Cloud. Capacity questions got answered with numbers instead of opinions.
Led architectural decisions for the corporate customers department and maintained the shared Web UI library across Careem’s products — a platform handling 380M+ requests a day for 10M+ monthly active users. Scrum master for a team of six.
Stack
Pick anything below to see which engagements it came from — the answer appears in the ledger above.
About
I’ve worked as a contractor for most of my career, which means I join codebases that already have history and constraints. The job is rarely a rewrite. It’s reading what’s there, finding the seam, and leaving the team with something they can extend after I’m gone.
I’m based in Berlin, Germany, and work remotely across European time zones. Ukrainian is my first language; I work in English and German.
Lviv Polytechnic National University
Thesis: a context-aware web service for booking personal services. Coursework included writing a compiler in C/Assembler and implementing virtual desktops for Windows 7 against the WinAPI.
Contact
Contract, fractional lead, or a second opinion on an architecture decision — all fine.
Berlin, Germany · remote across Europe · CV in plain text