Руслан

Rus lan Rastehaiev Available

SEN IOR frontend engineer

Senior Frontend Engineer with 9+ years of experience building scalable web applications and 5+ years
specializing in React.js, Next.js, and TypeScript. Skilled in designing clean architectures, optimizing performance,

and ensuring accessibility (WCAG 2.1 AA). Experienced in startups, outsourcing, and enterprise environments,

with proven leadership as a mentor and Head of Development. Focused on delivering products that create real
value for users and align technology with long-term business goals.

[открыть контакты](см. выше в блоке «контактная информация»)

D eci m D t
a igi al Inc . Senior Frontend Engineer | 04.2024 - 0 6 .2025

Developed and launched a global e-commerce P WA platform for a pharmaceutical company with
[открыть контакты](см. выше в блоке «контактная информация») (WhatsApp) 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
E DUCA O TI N
compliance goals.

Delivered the first project phase to production on schedule, meeting all performance and
Higher education, Bachelor accessibility requirements.


20 11 - 20 51
S tack : PWA Studio, React.js, GraphQL (Apollo Client), Tailwind CSS, Informed.js, Jest

core Om s ni Senior Frontend Engineer | 0 7
.202 3 - 04.2024

Java Script (9+ years)
L ed the frontend architecture and development from scratch for a SaaS platform enabling
React.js (5+ years)
restaurants to manage staff, menus, inventory, and real-time orders.

Next.js (3 years)
Built MVP within strict deadlines, mentoring a junior developer and ensuring code quality through
TypeScript (3 years)
reviews and knowledge-sharing sessions.

Web Performance Optimization
Implemented real-time order tracking via WebSockets (pusher.js, laravel-echo), enabling instant
Accessibility (WCAG 2.1 AA)
updates across restaurant dashboards.

PWA (PWA Studio)
Designed and delivered multi-tenant subdomain architecture, allowing each restaurant to operate
GraphQL (Apollo Client) 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.).


Se condary S tack : React.js, TypeScript, Redux Toolkit, RTK Query, Ant Design, Tailwind CSS
R edux Toolkit

RTK Query
P j tw k
ro ec or Middle Frontend Engineer | 02.202 3 1 - 2.2024

WebSockets / Real-time
Developed a web application for AI-generated test completion, designing architecture and business
(pusher.js, laravel-echo)
logic. Integrated OpenAI API with custom prompts, implemented features and design, and connected
Server-Side Rendering (SSR)
the Stripe payment system for seamless transactions. Setting up CI/CD in GitHub actions.


Tailwind CSS

Material UI (MUI)
S tack : Next.js, TypeScript, Redux Toolkit, Tailwind CSS, And Design, MongoDB (Mongoose), CI/CD
Ant Design

Testing (Jest)
At ml a ira Middle Frontend Engineer | 05.2022 - 0 .202 1 3
CI/CD (GitHub Actions)

Stripe / Payments Integration
Contributed to the migration of a high-traffic sports events platform (200k+ concurrent users) to a
MongoDB / Mongoose
modern stack (Next.js).

AI API / OpenAPI 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)
Tool s
and implementing a matching routing system in Next.js.

Collaborated closely with backend and SEO teams to balance scalability, user experience, and search
Gi t
ranking preservation.

Docker

Stack: Next.js, TypeScript, Material-UI, REST API, React Hook Form, Yup
Copilot / Cursor (Coding boosting)

Figma

Agile / Scrum workflows Five4dog Frontend Engineer / Head of Dev. Department | 04.2020 - 05.2022

Frontend Development: Led and scaled the development team, overseeing architecture, code quality,

S oft and project delivery. Balanced hands-on coding with mentorship and task management.

delivery capacity while maintaining high standards, gaining early leadership experience.

Increased

R esponsible and tactful

Result and details oriented
Team Leadership: Delivered complex client projects end-to-end using React and modern frontend

Good communicative skills

tools. Optimized performance, implemented analytics, and built reusable components. Became the

Teamwork skills

go-to developer for challenging tasks, earning promotion for reliability and technical expertise.

Great initiative

Stack: JavaScript. React.js, HTML5, SCSS, Gulp
High social adaptability

Earlier experience >

Languages: English (B2), Ukrainian

INTERESTS: Gym, Healthy food, Electronic music festivals