Maks

Maksym Petryshchak
Frontend Developer · Performance UI · Jamstack (Astro) · PageSpeed 95+

Ukraine, Remote​
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🔗 https://github.com/PetrischakMaxim​
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Telegram: @max_petrischak

Profile

Frontend Developer with 6+ years of experience specialising in performance-first UI, pixel-perfect
markup, and HTML5 creative development.

Deep expertise in converting complex Figma designs to production-ready interfaces with consistently
high Core Web Vitals scores (PageSpeed 95+).

Experienced in AdTech creative development (dynamic display, video, and interactive HTML5 creatives)
and Jamstack architecture (Astro, headless CMS).

Background working across AdTech, marketing, and content-driven platforms, collaborating closely with
designers, product managers, and marketing teams.

Open to full-time or part-time contracts, async-remote engagements, specialist freelance projects.

Core Specialisms

●​ HTML5 / CSS3 / BEM / SCSS / LESS
●​ Performance optimisation - Core Web Vitals, PageSpeed 95+
●​ HTML5 creatives - display, video, interactive (AdTech)
●​ UI animations - CSS, GSAP
●​ Jamstack - Astro (SSG), headless CMS (WordPress REST API, Keystatic)
●​ Figma to production - pixel-perfect, responsive, cross-browser
●​ JavaScript ES6+, TypeScript, React (production)
●​ Tailwind CSS, Git, npm, Stripe, Zapier, GA integrations
Work Experience

Freelance Frontend Developer & E-commerce Entrepreneur
Sep 2025 – Present | Remote

●​ Jamstack website development (Astro, headless CMS, performance optimisation)
●​ UI implementation from Figma to production-ready code
●​ Operating an independent e-commerce store (online sales)
●​ Active projects: cryptowalletatlas.com, ongoing freelance contracts

Frontend Developer | Innervate (formerly RevJet)
AdTech platform serving dynamic display and video creatives for global advertising campaigns.

Feb 2023 – Sep 2025 | Remote

●​ Built and shipped production-ready HTML5 display and video creatives with data-driven
personalisation for client-specific ad campaigns, as part of the TAM creative team
●​ Optimised all creatives for performance and reliability across multiple ad networks and device
environments
●​ Developed internal management tools and smart forms using React, collaborating with product
and design teams
●​ Worked across the full delivery lifecycle with designers, creative leads, and product managers
to improve UI/UX quality

HTML / Markup Developer | Together Networks Limited

Consumer tech company building marketing websites and product landing pages at scale.

May 2018 – Jan 2023 | Remote

●​ Delivered marketing landing pages and product websites using pure HTML, CSS (LESS, SCSS),
and JavaScript - no external UI libraries
●​ Built interactive forms, HTML5 banners, and email templates with a focus on cross-browser
compatibility and clean, maintainable markup
●​ Consistent focus on load performance and pixel-perfect conversion from designer layouts to
production code
●​ Worked closely with designers to deliver production-ready interfaces across multiple products
Mentor, Frontend Development | HTML Academy
Leading frontend education platform.

Sep 2019 – Jan 2022 | Remote

Mentored students in HTML, CSS, and JavaScript on a professional frontend development course.
Conducted code reviews, technical consultations, and layout workshops. Ran this role in parallel with a
full-time position - demonstrating structured async working and reliable self-management.

HTML Developer | Freelance

Jun 2016 – Dec 2017

●​ Developed responsive landing pages and worked with CMS platforms (Joomla, OpenCart)
Freelance & Independent Projects

10+ websites delivered end-to-end, from client brief through design implementation, performance
optimisation, and production deployment. All projects achieve PageSpeed scores of 90+.

●​ yourfintech.com - Corporate website + blog - Astro, headless CMS, performance-optimised
●​ asignatures.mt - Luxury Apartments & Suites Malta website, Astro SSG
●​ cryptowalletatlas.com - Content-driven crypto & security blog - SEO-first, Astro SSG, active
project
●​ corporatebylegacy.com - Corporate wellness services website - Astro, Tawk, responsive layout
●​ trafficgold.com - Marketing website + blog - Wordpress, GA, Search Console, tracking pixels
●​ adthorized.com - Marketing website + blog - Wordpress, Zapier, conversion-focused design

Freelance scope includes: client communication, requirements gathering, UI/UX implementation,
performance auditing, third-party integrations (Stripe, Calendly, Tawk, Zapier, GA), SEO setup, and
production deployment.

Skills
●​ Markup & Styles: HTML5, CSS3, BEM, SCSS, LESS, Tailwind CSS - responsive, cross-browser
●​ Performance: Core Web Vitals, PageSpeed 95+, LCP / CLS / FID optimisation, Lighthouse
auditing
●​ Creative / AdTech: HTML5 display & video creatives, data-driven personalization, interactive
banners
●​ Animation: CSS animations, GSAP - UI micro-interactions, scroll-based effects
●​ Jamstack / CMS: Astro (SSG), WordPress REST API, Keystatic headless CMS
●​ JavaScript: ES6+, TypeScript (proficient), React (production experience)
●​ Design to code: Figma, Photoshop - pixel-perfect implementation
●​ Integrations: Stripe, Calendly, Tawk, Zapier, Google Analytics, Search Console, tracking pixels
●​ Tooling: Git, npm, terminal workflow, Cursor, AI-assisted development (ChatGPT, Cursor,
Claude)

Availability & Working Preferences
Open to: full-time or part-time contracts, async-remote engagements, specialist freelance projects.
Timezone: Ukraine (EET / UTC+2). Good overlap with EU and UK business hours.
Experienced working asynchronously.