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Max
Kolosov

Average Review
0.00
Reputation
16
Finished gigs
0
Finished jobs
0
Website
github.com
Country
Not specified
Skills
Web, Mobile & Software Dev
IT & Networking
HTML
Javascript
React
CSS
HTML5
Node.js
CSS3
Landing Pages
Front End
Back End Developer
Data Science & Analytics
Chatbots
Web Application
Custom Website
Scripting
Software Engineering
Automation
Specialization
Software Engineer
Hourly rate
$65/hr
Preferred payment options
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MATIC
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About me
I turn raw ideas into shipping SaaS, dashboards and Mini Apps. 5+ years in production, from UX wireframe to Kubernetes deploy. What I do best: - React / Next.js / Node.js – SSR, App Router, real-time sockets. - API design – REST & GraphQL, Stripe/PayPal billing, OpenAI GPT-4o integration. - Performance – cut FCP by 40 %, shrink bundles by 60 %. Where I helped: - MoodMap Logs: mental-health SaaS, 99.9 % uptime, secure subscription flow. - Ledger Dashboard: crypto assets in real time, API latency ↓ 40 %. - Macy’s storefront: Core Web Vitals 90+ across 1 M daily sessions. What you get: Clean, typed code, transparent daily updates, and post-launch support that actually answers. Ready to boost your product - just press “Hire”.
https://www.linkedin.com/in/max-kolosov/
https://github.com/Genimax

Work experience

Ledger
April 2022 – Current time
Job title
Senior Frontend Developer
Work experience & achievements
Developed an internal dashboard for secure asset management and real-time transaction monitoring. - Implemented advanced authentication flows and role-based access. - Achieved a 40.3% reduction in data-fetch latency by optimizing GraphQL queries and caching strategies. - Built a role‑based asset dashboard with WebSocket‑driven live transaction streams, cutting audit lookup time by 45 %. Technologies: Web3, Javascript, CSS, React, TypeScript, GraphQL (Apollo), Jest, Cypress, ESLint.
HM
January 2021 – March 2022
Job title
Frontend Developer
Work experience & achievements
Built an internal web platform to foster employee growth and streamline performance feedback. - Implemented real‑time front‑end error monitoring in production (Sentry + Web Vitals), surfacing UI issues within minutes and cutting user‑reported bugs by 40 %. - Implemented code‑splitting and lazy‑loading, shrinking the initial bundle by 60 % and cutting first‑paint time by 40 %. Technologies: JavaScript, CSS, HTML, React, Redux, TypeScript, Jest, Cypress, Webpack, Prettier, Git.
Macy's
July 2019 – December 2020
Job title
Frontend Developer
Work experience & achievements
Developed an internal e-learning platform for staff training and career growth. - Designed a drag‑and‑drop lesson builder, cutting content onboarding time by 30.4 %. - Strengthened codebase with Jest unit tests, Cypress e2e, Prettier / ESLint - reducing post‑release defects by 10.1 %. Technologies: JavaScript, CSS, HTML, React, TypeScript, GraphQL (Apollo), Jest, Cypress, ESLint.

Education

NSTU
Graduation year: 2019
Level of study
Bachelor
Major / Field of study
Computer and Information Sciences

CV

Maksim_Kolosov_Frontend_2025.pdf