Роман

STRYKIVSKYI ROMAN
Full Stack Developer
Email: [відкрити контакти](див. вище в блоці «контактна інформація»)
GitHub: https://github.com/RomanPie2020
LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація»)
SUMMARY
Full Stack Developer with 4+ years of commercial experience building web and mobile
applications. Strong hands-on experience with React, Next.js, React Native, Node.js,
TypeScript, and NestJS across frontend and backend development. Skilled in developing
REST APIs, authentication systems, real-time features, and maintainable application
architectures using PostgreSQL, MongoDB, and Redis. Focused on clean code, automated
testing, and building reliable, scalable solutions.
SKILLS
Programming Languages: JavaScript (ES6+), TypeScript
Frontend Development: React, Next.js, React Native (Expo), Redux Toolkit, RTK Query,
TanStack Query, Zustand, Tailwind CSS, React Hook Form, Zod, Framer Motion,
WebSockets, WebRTC, WebView, Reanimated
Backend Development: Node.js, NestJS, Express.js, REST APIs, GraphQL, gRPC,
Socket.io, Authentication & Authorization (JWT, Google OAuth, RBAC), Microservices
Databases & Messaging: PostgreSQL, MongoDB, Redis, Prisma, TypeORM, RabbitMQ,
BullMQ
Testing: Jest, React Testing Library, Playwright, Supertest, Maestro
DevOps & Infrastructure: Git, Linux, Docker, Docker Compose, Nginx, Kubernetes,
Terraform, AWS S3, CI/CD
Tools & Integrations: Firebase, Supabase, Auth0, Stripe, RevenueCat, EAS, Vite
EXPERIENCE
NDA (contract) | January 2026 - September 2026
Full Stack Developer — Startup Project (Domain: Self-Improvement)

-Developed a cross-platform mobile application using React Native, NestJS, PostgreSQL,
and Firebase, working across both frontend and backend development.
- Implemented a complete authentication system with email verification, OTP-based
password reset, Google and Apple Sign-In, and account deletion.
- Developed a customizable focus timer with multiple work/break modes, custom timer
configurations, and session completion notifications.
- Built calendar and event management functionality for scheduling and managing date-
based events.
- Implemented a notification system with daily reminders, scheduled event notifications,
Do Not Disturb mode, and notification preferences.
- Developed a points system to increase user engagement and encourage consistent
usage.
- Integrated RevenueCat to manage in-app subscriptions, multiple user plans, and free
trial periods.
- Developed and maintained comprehensive automated tests across frontend and
backend using Jest, React Native Testing Library, Supertest, and Maestro.

TenThousand | August 2023 - January 2026
Full Stack Developer — (Domain: Fitness, Mobile, SaaS, Logistics)

- Developed and maintained web and mobile applications using React, Next.js, React
Native, Expo.
- Worked with GraphQL and gRPC for API communication and integration between
application services.
- Worked with microservice-based architectures, separating application functionality
into independently organized services.
- Used RabbitMQ for asynchronous communication between services and decoupling
background processing from request handling.
- Implemented background jobs and asynchronous task processing using BullMQ and
Redis.
- Developed real-time features using WebSockets, including GPS tracking and live
updates.
- Integrated Stripe payment functionality and third-party authentication, email, and
Firebase services.
- Developed invitation workflows, deep linking, Android App Links, iOS Universal Links, and
deferred deep linking.
Freelance | June 2022 - July 2023
Full Stack / Web Developer
Tech Stack: JavaScript, TypeScript, React, React Native, Next.js, Redux Toolkit, RTK Query,
Node.js, NestJS, Express.js, PostgreSQL, MongoDB, Sequelize, REST API, HTML5, CSS3,
Tailwind CSS.

- Developed responsive web applications, landing pages, and Single Page Applications
(SPAs) using React, Next.js, JavaScript, and TypeScript.
- Built cross-platform mobile applications using React Native and Expo.
- Developed reusable UI components, interactive interfaces, animations, forms, and
client-side validation.
- Managed application state and data fetching using Redux Toolkit, RTK Query, and other
state management solutions.
- Developed backend functionality and RESTful APIs using Node.js, NestJS, and Express.js.
- Designed and integrated databases using PostgreSQL, MongoDB, and Sequelize.
- Integrated third-party services and APIs, implemented authentication flows, and
handled application data.
- Maintained and improved existing applications, implemented new features, and
troubleshot frontend and backend issues.
- Collaborated on application architecture, code refactoring, performance optimization,
and overall code quality.
EDUCATION
2021 - 2025 | Lviv Polytechnic National University
Bachelor of Computer Science - Software Engineering
ADDITIONAL INFORMATION

Ukrainian: Native
English: Upper-Intermediate (B2)