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Hello! I’m Maksym Maryash, a Senior JavaScript and Full-Stack Engineer with over 14 years of experience building high-load web applications and scalable distributed systems. I specialize in React, Next.js, Node.js, Nest.js, and GraphQL ecosystems, with a strong focus on performance optimization, system scalability, and clean architecture. In my roles, I have led frontend performance initiatives, designed scalable architectures, and built robust back-ends with Node.js and GraphQL. I enjoy solving complex engineering challenges and mentoring teams to deliver production-ready features.…Hello! I’m Maksym Maryash, a Senior JavaScript and Full-Stack Engineer with over 14 years of experience building high-load web applications and scalable distributed systems. I specialize in React, Next.js, Node.js, Nest.js, and GraphQL ecosystems, with a strong focus on performance optimization, system scalability, and clean architecture. In my roles, I have led frontend performance initiatives, designed scalable architectures, and built robust back-ends with Node.js and GraphQL. I enjoy solving complex engineering challenges and mentoring teams to deliver production-ready features.

Maksym Maryash

Full Stack Developer, Web Developer, Front-End Developer, +2

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Hello! I’m Maksym Maryash, a Senior JavaScript and Full-Stack Engineer with over 14 years of experience building high-load web applications and scalable distributed systems. I specialize in React, Next.js, Node.js, Nest.js, and GraphQL ecosystems, with a strong focus on performance optimization, system scalability, and clean architecture. In my roles, I have led frontend performance initiatives, designed scalable architectures, and built robust back-ends with Node.js and GraphQL. I enjoy solving complex engineering challenges and mentoring teams to deliver production-ready features.…Hello! I’m Maksym Maryash, a Senior JavaScript and Full-Stack Engineer with over 14 years of experience building high-load web applications and scalable distributed systems. I specialize in React, Next.js, Node.js, Nest.js, and GraphQL ecosystems, with a strong focus on performance optimization, system scalability, and clean architecture. In my roles, I have led frontend performance initiatives, designed scalable architectures, and built robust back-ends with Node.js and GraphQL. I enjoy solving complex engineering challenges and mentoring teams to deliver production-ready features.

Next availability:

April 22, 2026

Poznan, Poland

Hello! I’m Maksym Maryash, a Senior JavaScript and Full-Stack Engineer with over 14 years of experience building high-load web applications and scalable distributed systems. I specialize in React, Next.js, Node.js, Nest.js, and GraphQL ecosystems, with a strong focus on performance optimization, system scalability, and clean architecture.
In my roles, I have led frontend performance initiatives, designed scalable architectures, and built robust back-ends with Node.js and GraphQL. I enjoy solving complex engineering challenges and mentoring teams to deliver production-ready features.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

Ukrainian

Fluent

Russian

Fluent

English

Advanced

Work Experience

Senior Full-Stack JS Developer at NDA (High-load online gambling & casino platform)

July 1, 2024 - Present

Led frontend performance optimization initiatives, reducing document size through Next.js hydration data optimization; defined and implemented lazy-loading strategies for UI components to improve initial page load; improved Core Web Vitals (LCP, TTI) through bundle optimization and rendering strategy enhancements; implemented Apollo Persisted Queries (APQ) to enable CDN-level caching of GraphQL responses and reduce backend traffic; conducted technical interviews and built a frontend team of 8 engineers, leading and mentoring them.

Senior Full-Stack JS Developer at CloverTech (Tech Talents brand)

August 1, 2023 - July 31, 2024

Improved React rendering efficiency by introducing memoization patterns and optimizing state management architecture; implemented code-splitting strategies to reduce bundle size and improve page load performance; designed and developed a reusable Data Loader-based plugin to eliminate N+1 queries; designed Redis-based distributed locking around Next.js SSG/ISR revalidation to prevent concurrent regeneration in an HPA-enabled environment; contributed to overall system scalability and backend efficiency through architectural improvements.

Senior Full-Stack JS Developer at CloverTech

February 1, 2023 - August 1, 2023

Worked on the gambling platform focusing on backend efficiency and frontend rendering optimization.

Senior Full-Stack JS Developer at Beetroot

May 1, 2020 - February 28, 2023

Developed and maintained complex React applications for viewing and analyzing high-resolution medical scans; built features supporting remote diagnostics; contributed to communication tools for doctors and pathologists; implemented asynchronous processing using RabbitMQ to handle background tasks and data pipelines; improved performance of the scan viewer handling large image datasets; designed and implemented backend APIs using Node.js; optimized PostgreSQL queries; worked with cloud infrastructure on Microsoft Azure, integrating back-end services with storage and monitoring tools; participated in production releases, deployments, and hotfixes; contributed to architectural improvements for long-term scalability.

Full-stack Engineer at Sweet Stack

September 1, 2019 - May 31, 2020

Contributed to the development of a cloud-based digital notebook platform; improved enterprise client applications with React and Vue.js; developed an admin panel for booking system managers; introduced structured frontend architecture using Nuxt.js and Vuetify; designed REST API endpoints; wrote optimized SQL queries; built backend services using Laravel; contributed to MVP feature deliveries and production-ready releases.

Full-stack Engineer at Beetroot.se

July 1, 2016 - December 31, 2016

Migrated a legacy client application to Vue.js, improving maintainability and frontend architecture; upgraded an existing Angular app to a newer version; designed and implemented PostgreSQL database schema; built REST API endpoints; optimized SQL queries and data access performance.

PHP Developer at Ecomarkup.com

January 1, 2012 - July 31, 2016

Developed a wide range of web applications and eCommerce platforms for startups and growing businesses; built eCommerce platforms with payment and delivery service integrations; integrated third-party services; designed database structures; developed REST API endpoints and custom CMS plugins.

Web Developer at Freelance

January 1, 2007 - September 1, 2012

Delivered complete web solutions from design to deployment for small businesses; built websites using CMS platforms; managed UNIX-based servers and deployments; handled hosting configuration and domain setup.