Працював в 7 компаніях   11 років 2 місяці

IT, Краса / Фітнес / Спорт, Інтернет

Senior Frontend Engineer (React.js)

Decima Digital Inc.

IT

1 рік 3 місяці

04.2024 - 06.2025

  • Developed and launched a global e-commerce PWA platform for a pharmaceutical company with operations in 59 cities.
  • Optimized performance and configured Content Security Policy (CSP), ensuring stable, secure, and fast user experience.
  • Ensured WCAG 2.1 AA accessibility compliance, making the platform inclusive for a worldwide customer base.
  • Collaborated with cross-functional teams (security, SEO) to align product delivery with business and compliance goals.
  • Delivered the first project phase to production on schedule, meeting all performance and accessibility requirements.

Tech Stack: PWA Studio, React.js, GraphQL (Apollo Client), Tailwind CSS, Informed.js, Jest

Senior Frontend Engineer (React.js / TypeScript)

YozmaTech-Empowering Tech Entrepreneurs

IT

9 місяців

08.2023 - 04.2024

  • Led the frontend architecture and development from scratch for a SaaS platform enabling restaurants to manage staff, menus, inventory, and real-time orders.
  • Built MVP within strict deadlines, mentoring a junior developer and ensuring code quality through reviews and knowledge-sharing sessions. Implemented real-time order tracking via WebSockets (pusher.js, laravel-echo), enabling instant updates across restaurant dashboards.
  • Designed and delivered multi-tenant subdomain architecture, allowing each restaurant to operate under its unique domain within a single app.
  • Developed secure role and plan-based access control, scaling the product for different subscription tiers (staff limits, inventory features, etc.).

Tech Stack: React.js, TypeScript, Redux Toolkit, RTK Query, Ant Design, Tailwind CSS

Senior Frontend Engineer ( Next.js / TypeScript)

Project Job

IT

1 рік 3 місяці

02.2023 - 04.2024

  • Created and launched MVP of an AI-powered platform helping IT professionals prepare for interviews through test-style questions generated dynamically based on role and seniority level.
  • Owned end-to-end delivery: architecture, frontend and backend implementation, CI/CD setup, Stripe payments integration, and database design.
  • Collaborated with a UI/UX designer, transforming business requirements into a working B2C product.
  • Leveraged Next.js, TypeScript, RTK Query, MongoDB, and OpenAI API to build a scalable and fast prototype.
  • Implemented secure payment flow (Stripe API + MongoDB tracking) and real-time access validation for paid sessions.
  • Gained hands-on experience with server setup and CI/CD pipelines (GitHub Actions + Next.js deployment).
  • Achieved 100+ user registrations in free mode within the first release phase.

Teach Stack: Next.js, TypeScript, Redux Toolkit, RTK Query, Ant Design, Tailwind CSS, MongoDB (Mongoose), CI/CD

Middle Frontend Engineer (Next.js / TypeScript)

Altamira

IT

8 місяців

05.2022 - 12.2022

  • Contributed to the migration of a high-traffic sports events platform (200k+ concurrent users) to a modern stack (Next.js).
  • Delivered performance-optimized search experience using memoization, lazy loading, virtual lists, and pagination to ensure stability under heavy loads.
  • Recreated the SEO-critical URL and content structure by auditing the legacy site (Screaming Frog) and implementing a matching routing system in Next.js.
  • Collaborated closely with backend and SEO teams to balance scalability, user experience, and search ranking preservation.

Tech Stack: Next.js, TypeScript, Material-UI, REST API, React Hook Form, Yup

Front End Developer

Five4dog

IT

2 роки 1 місяць

05.2020 - 05.2022

Head of the Development Department

10.2021 – 05.2022 | Hybrid | Full-time

  • Led and mentored a team of engineers: conducted interviews, distributed tasks, managed workloads.
  • Oversaw project evaluation and architecture decisions for client solutions.
  • Introduced best practices in frontend workflows (reusable patterns, optimization, code reviews).
  • Balanced leadership with hands-on coding, ensuring delivery quality under deadlines.

As a Frontend Engineer

04.2020 – 10.2021 | Hybrid | Full-time

  • Worked as the core Frontend engineer in a web studio, responsible for delivering client projects end-to-end.
  • Built responsive, cross-browser layouts and reusable UI components using HTML5, SCSS, JS (ES6), BEM, Bootstrap.
  • Developed dynamic functionality for WordPress and OpenCart projects.
  • Delivered first SPA prototypes using React.js,, Redux Toolkit, Axios, React Hook Form, Tailwind CSS.
  • Focused on performance optimization (Lighthouse audits, lazy loading, asset bundling) and analytics (Google GTM event tracking).

Tech stack: React.js, Redux Toolkit, Tailwind CSS, HTML5, SCSS, BEM, Git

Front End Developer

Safari Concern

Краса / Фітнес / Спорт

3 роки 10 місяців

11.2015 - 08.2019

  • Developed and maintained multiple websites for fitness clubs across different cities, covering both frontend (HTML5, CSS3/SCSS, JavaScript, Bootstrap) and backend (PHP, MySQL) parts.
  • Built custom admin panels and user dashboards to support business operations.
  • Integrated CRM systems and online payment solutions.
  • Collaborated closely with the marketing team to quickly launch and optimize landing pages for business campaigns.

Tech stack: HTML5, CSS, SCSS, Bootstrap, JavaScript, Git, Page Speed Optimization

Junior Front End Developer

Freelancer

Інтернет

2 роки 3 місяці

03.2013 - 05.2015

  • Created websites and landing pages for small businesses (beauty salons, travel agencies, service providers), implementing HTML5, CSS3, JS, jQuery.
  • Designed layouts and basic functionality for client projects, adapting solutions to business needs.
  • Self-initiated learning of web technologies, building own small projects to explore frontend development.

Tech stack: HTML5, CSS, Bootstrap, JavaScript

Ключова інформація

Core

  • React.js,
  • Next.js (SSR SSG, ISR),
  • TypeScript,
  • JavaScript (ES6+),
  • REST API,
  • HTML5, CSS3/SCSS,
  • Accessibility (WCAG AA),
  • Web Performance Optimization,
  • PWA (PWA Studio),
  • GraphQL (Apollo Client)

Secondary

  • Redux Toolkit,
  • RTK Query,
  • WebSockets,
  • TailwindCSS,
  • Material UI (MUI),
  • Shadcn
  • Ant Design,
  • Testing (Jest),
  • CI/CD (GitHub Actions),
  • Stripe (Payments Integration),
  • MongoDB,
  • AI (OpenAI API)

Навчався в 1 закладі

ХГАФК

Циклические виды спорта,тренер по плаванию

Харьков, 2015

Володіє мовами

Англійська

середній

Додаткова інформація

Особисті якості

Responsible and tactful, Problem-solving, Result and details oriented, Communication, Teamwork skills, Great initiative, High social adaptability

Ruslan Sergeevish

Senior Front-End developer

Київ

Готовий переїхати: Київ, Львів, Одеса

3 200 $

33 роки

Активно шукає роботу

повна зайнятість, проектна робота

Характер роботи: віддалена робота

Остання активність 1 день тому