Skip to main content
MZ-SYSTEM: ACTIVE
Maksym Zakaliuzhnyi
PROFILE / FRONTEND · FULLSTACK

I build landing systems and CMS-driven products that ship fast and load faster — from pixel to database.

Production landing pages, A/B test variants, and bilingual content platforms — built and supported for marketing teams that ship weekly. Frontend-first, comfortable owning the backend: Stripe payments, auth, PostgreSQL/Prisma, and CMS backends shipped in production-grade projects. Focus stack: Next.js, Astro, Payload CMS, TypeScript, Node.js.

[02]PROOF & STACK
EXPERIENCE CYCLE
4+ YearsCOMMERCIAL DELIVERY
PRODUCTION METRIC
300+ LandingsBUILT & SHIPPED
TECHNOLOGY DEPTH
A/B TestingIN PRODUCTION

Engineering Inventory

A working toolkit, not a wishlist: every technology below has shipped production pages — fast loads, structured content, quick bilingual rollouts.

Next.js
React
TypeScript
JavaScript
Payload CMS
Tailwind CSS
Astro
HTML & CSS
GSAP
Framer Motion
TanStack Query
Zustand
Redux
Gulp
Node.js
Express.js
PostgreSQL
MongoDB
Prisma
Docker
Vercel
[03]CASE STUDIES
NODES: 3
//NODE_LMS-PLATFORM
LIVE

LMS Platform

ROLE: Full-Stack Developer — Pet Project DATE: 2025–2026

End-to-end ownership: data model, auth, payments, video streaming, and UI — all designed and shipped solo. A full-stack Learning Management System on Next.js 14 App Router. Teachers build courses with rich-text descriptions, video chapters, and attachments; students browse the catalog, enroll for free or via Stripe Checkout, watch videos, and track chapter progress on a personal dashboard.

//NODE_PORTFOLIO-CMS
LIVE

Portfolio CMS

ROLE: Solo Developer — Frontend, CMS & Backend Architecture DATE: Q1–Q2 2026

This site itself: a bilingual portfolio platform on Next.js 16 App Router with embedded Payload CMS 3. Every piece of content is editable in the admin panel and goes live without a redeploy.

//NODE_AB-TESTING-LAB
LIVE

A/B Testing Lab

ROLE: Frontend Developer — Sanitized Work Replica DATE: 2026

A public, sanitized rebuild of the A/B landing platform I run in production (the original is under NDA): config-driven split tests, weighted traffic rollout, and sticky version assignment — with all employer branding, code, and data removed.

[04]ARCHIVE SYSTEM

Painting: Three Tracks

_01

Seasonal promo landing for three painting tracks — countdown timer and per-track student galleries

campaign2026
Visit live site

Fast Reading Course

_02

Landing for a gamified speed-reading course — progress cards and GSAP micro-animations

landing2025
Visit live site

NMT-2026 Prep

_03

Exam-prep landing with countdown urgency, video testimonials and a three-format pricing block

landing2025
Visit live site

Interior Design Course

_04

Landing for a kids interior-design course — learning-progress timeline and portfolio gallery

landing2026
Visit live site

GoITeens Landing Registry

_05

Live ledger of A/B-tested landing pages I build and support

platform2024–2026
Visit live site
VIEW FULL ARCHIVE LEDGER [→]
[05]EXPERIENCE LOG

Frontend Developer

GoITeens, Ukraine
June 2024 — Present
  • Build and maintain marketing landing pages at production scale on Next.js, Astro, Payload CMS, and Gulp.
  • Implement A/B testing end-to-end: variant builds, traffic splits, and conversion analytics for paid campaigns.
  • Integrate Payload CMS so marketing editors publish content without developer involvement.
  • Mentor a junior developer: code review, task decomposition, onboarding.

Frontend Developer

SoftRyzen, Ukraine
July 2022 — April 2024
  • Delivered 150+ landing pages and CRM frontends with React and Gulp.
  • Worked with designers and backend developers to keep UI pixel-accurate and consistent.
  • Improved performance and maintainability of long-running projects.