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I’m a senior frontend developer with around eight years of commercial experience building production-ready web applications and websites for enterprise media, healthcare, and B2B clients. I’m strong in JavaScript and TypeScript and I work fluently across React, Next.js, Angular, Svelte, and SolidJS, applying engineering practices like TDD/SBDD, SSR/SSG, and performance optimization (including Core Web Vitals) to deliver reliable, user-facing features. I also have solid backend capability with Node.js, NestJS, Express, PostgreSQL, Redis, Docker, and Golang, and I’ve worked in SPA and micro-frontend setups using Module Federation, WebSockets, REST, GraphQL, and real-time integrations. I enjoy turning product requirements and translated specifications into maintainable code, collaborating across teams of different sizes, and supporting end-to-end releases—whether that’s media workflow platforms, B2B landing pages with HubSpot/SEO tracking, or full-stack products delivered as an independent contractor.…I’m a senior frontend developer with around eight years of commercial experience building production-ready web applications and websites for enterprise media, healthcare, and B2B clients. I’m strong in JavaScript and TypeScript and I work fluently across React, Next.js, Angular, Svelte, and SolidJS, applying engineering practices like TDD/SBDD, SSR/SSG, and performance optimization (including Core Web Vitals) to deliver reliable, user-facing features. I also have solid backend capability with Node.js, NestJS, Express, PostgreSQL, Redis, Docker, and Golang, and I’ve worked in SPA and micro-frontend setups using Module Federation, WebSockets, REST, GraphQL, and real-time integrations. I enjoy turning product requirements and translated specifications into maintainable code, collaborating across teams of different sizes, and supporting end-to-end releases—whether that’s media workflow platforms, B2B landing pages with HubSpot/SEO tracking, or full-stack products delivered as an independent contractor.

Ruslan Matuasevich

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

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I’m a senior frontend developer with around eight years of commercial experience building production-ready web applications and websites for enterprise media, healthcare, and B2B clients. I’m strong in JavaScript and TypeScript and I work fluently across React, Next.js, Angular, Svelte, and SolidJS, applying engineering practices like TDD/SBDD, SSR/SSG, and performance optimization (including Core Web Vitals) to deliver reliable, user-facing features. I also have solid backend capability with Node.js, NestJS, Express, PostgreSQL, Redis, Docker, and Golang, and I’ve worked in SPA and micro-frontend setups using Module Federation, WebSockets, REST, GraphQL, and real-time integrations. I enjoy turning product requirements and translated specifications into maintainable code, collaborating across teams of different sizes, and supporting end-to-end releases—whether that’s media workflow platforms, B2B landing pages with HubSpot/SEO tracking, or full-stack products delivered as an independent contractor.…I’m a senior frontend developer with around eight years of commercial experience building production-ready web applications and websites for enterprise media, healthcare, and B2B clients. I’m strong in JavaScript and TypeScript and I work fluently across React, Next.js, Angular, Svelte, and SolidJS, applying engineering practices like TDD/SBDD, SSR/SSG, and performance optimization (including Core Web Vitals) to deliver reliable, user-facing features. I also have solid backend capability with Node.js, NestJS, Express, PostgreSQL, Redis, Docker, and Golang, and I’ve worked in SPA and micro-frontend setups using Module Federation, WebSockets, REST, GraphQL, and real-time integrations. I enjoy turning product requirements and translated specifications into maintainable code, collaborating across teams of different sizes, and supporting end-to-end releases—whether that’s media workflow platforms, B2B landing pages with HubSpot/SEO tracking, or full-stack products delivered as an independent contractor.

Available to hire

I’m a senior frontend developer with around eight years of commercial experience building production-ready web applications and websites for enterprise media, healthcare, and B2B clients. I’m strong in JavaScript and TypeScript and I work fluently across React, Next.js, Angular, Svelte, and SolidJS, applying engineering practices like TDD/SBDD, SSR/SSG, and performance optimization (including Core Web Vitals) to deliver reliable, user-facing features.

I also have solid backend capability with Node.js, NestJS, Express, PostgreSQL, Redis, Docker, and Golang, and I’ve worked in SPA and micro-frontend setups using Module Federation, WebSockets, REST, GraphQL, and real-time integrations. I enjoy turning product requirements and translated specifications into maintainable code, collaborating across teams of different sizes, and supporting end-to-end releases—whether that’s media workflow platforms, B2B landing pages with HubSpot/SEO tracking, or full-stack products delivered as an independent contractor.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Russian

Fluent

Belarusian

Advanced

English

Advanced

Polish

Intermediate

German

Beginner

Work Experience

Senior Frontend Developer (B2B Freelance)

October 1, 2024 - Present

Delivered full-stack web and mobile products as an independent contractor, owning requirements, development, and deployment end to end. Built a cross-platform baby tracking mobile app using React Native/Expo with offline-first storage, device sync, activity timers, iOS live activities, and multi-language support. Developed a full-stack VPN platform with an Astro/React frontend, Node.js backend, PostgreSQL, and Docker, including SEO-optimized marketing pages, analytics across signup/payment funnel, Telegram bot, admin dashboard, billing webhooks, and automated configuration provisioning. Created a Telegram Chrome side panel using React/TypeScript/Vite and gramjs with QR, phone, and 2FA flows. Built multilingual B2B landing pages using Astro/Svelte/Tailwind and integrated HubSpot via OAuth, plus calculators and multi-step lead forms with GA4 tracking.

Senior Front-End Developer, B2B Freelance at Freelance (B2B)

October 1, 2024 - Present

Delivered full-stack web and mobile products as an independent contractor, owning requirements, development, and deployment end-to-end. Built a cross-platform baby tracking mobile app using React Native/Expo/Supabase with offline-first storage, activity timers, iOS live activities, multi-device sync, and multi-language support. Developed a full-stack VPN platform with Astro/React/Node.js, PostgreSQL, and Docker, including an SEO-optimized marketing site, analytics tracking across signup and payment funnel, Telegram bot/admin dashboard, billing webhooks, and automated provisioning workflows. Also created a Chrome side-panel Telegram client with React/TypeScript/Vite/GramJS and implemented QR/phone login plus two-factor authentication with encrypted session storage. Built a multilingual B2B landing page using Astro/Svelte/Tailwind and integrated HubSpot CRM via OAuth, including savings calculator and multi-step forms (Google Analytics 4).

Senior Frontend Developer at Civitta (ex Techvice Sp. z o.o.)

May 1, 2022 - October 1, 2024

Worked on enterprise projects requiring reliable, high-performance frontend delivery and ongoing technical support. Implemented role-based access, responsive layouts, and performance improvements across enterprise modules. Converted UI designs into functional React web applications and PHP websites. Delivered secure interview platforms for web and electronic applications, including WebRTC-based real-time video/audio and reconnectable peer sessions, plus secure file sharing. Built and maintained a large-scale React media management platform for broadcast operations including content management, playlist planning, layout control, and workflow coordination. Added real-time updates via WebSockets for planner/workflow data and multi-viewer live support using HTML5/WebRTC/SLD/ MSE.

Senior Front-End Developer at Civitta (ex Techvice Sp. z o.o.)

May 1, 2022 - October 1, 2024

Developed and maintained large-scale frontend systems and worked on multiple enterprise initiatives. Implemented real-time updates using WebSockets for planner/workflow data and supported live multiviewer functionality with HTML5/WebRTC/SDP/MSE. Built client-facing applications for healthcare data privacy services (preventing sensitive PHI/PII exposure to third-party language models) using Next.js/React/TypeScript, TanStack Query, and Radix UI. Delivered secure interview platforms for web and electron applications, including WebRTC-based real-time video/audio and secure file sharing. Applied role-based access control, responsive layouts, and performance optimizations across enterprise modules used daily by production teams, and converted UI designs into functional React web apps and PHP websites for production.

Frontend Developer at Techvice

January 1, 2018 - January 1, 2022

Built and maintained frontend features for production systems. Delivered secure, client-facing healthcare data privacy services with Next.js/React/TypeScript, TanStack Query, and Radix while preventing sensitive PHI/PII from reaching third-party language models. Developed secure broadcast and WebRTC-based features for real-time interactions and file sharing. Supported enterprise accessibility and UX needs with dependable component implementations and continuous issue resolution.

Front-End Developer at Techvice

January 1, 2018 - May 1, 2022

Contributed to production-focused frontend development across enterprise projects, translating design specifications into working web applications using React/JavaScript and TypeScript/PHP as needed. Provided ongoing technical support for released products, fixed issues, and improved performance over time. Participated in enterprise-scale media and broadcast tooling, including content management, playlist planning, layout control, and workflow coordination for daily broadcast operations.