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
Ruslan Sergeevish
Senior Front-End developer

Київ
Готовий переїхати: Київ, Львів, Одеса
Активно шукає роботу
повна зайнятість, проектна робота
Характер роботи: віддалена робота
Остання активність 1 день тому