Senior Full Stack Engineer with 8+ years of experience in building modern web and mobile applications. I have strong expertise in Node.js, React, and TypeScript, with proven skills in designing scalable back-end architectures, database management, and cloud deployment. I enjoy collaborating in cross-functional teams to deliver high-performance, maintainable, and user-focused applications. I’m passionate about architecting end-to-end solutions, optimizing system reliability, and mentoring teammates to grow their skills.…

Roman Vasylevskyi

Senior Full Stack Engineer with 8+ years of experience in building modern web and mobile applications. I have strong expertise in Node.js, React, and TypeScript, with proven skills in designing scalable back-end architectures, database management, and cloud deployment. I enjoy collaborating in cross-functional teams to deliver high-performance, maintainable, and user-focused applications. I’m passionate about architecting end-to-end solutions, optimizing system reliability, and mentoring teammates to grow their skills.…

Available to hire

Senior Full Stack Engineer with 8+ years of experience in building modern web and mobile applications. I have strong expertise in Node.js, React, and TypeScript, with proven skills in designing scalable back-end architectures, database management, and cloud deployment. I enjoy collaborating in cross-functional teams to deliver high-performance, maintainable, and user-focused applications. I’m passionate about architecting end-to-end solutions, optimizing system reliability, and mentoring teammates to grow their skills.

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Skills

Experience Level

Python
Expert
React Native
Expert
React JS
Expert
Node.js
Expert
TypeScript
Expert
API
Expert
PostgreSQL
Expert
Docker
Expert
MongoDB
Expert
Express
Expert
Azure
Expert
AWS
Expert
Redis
Expert
Tailwind
Expert
Django
Expert
Kubernetes
Expert
TensorFlow
Intermediate
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Work Experience

Senior Full Stack Engineer at Fracta Labs
November 1, 2023 - July 31, 2025
Designed and developed scalable front-end applications with React.js, focusing on reusable components, rendering performance, and responsive accessible UIs. Built cross-platform mobile apps using React Native delivering native-like performance, animations, and seamless backend integration. Engineered robust backend services with Node.js (Express.js) including REST API design, authentication flows, data modeling, and secure session management. Automated deployments through CI/CD pipelines using Docker, Kubernetes, and GitHub Actions, enhancing release velocity and reducing errors. Architected and delivered a scalable health mobile application on iOS and Android ensuring reliability and high performance. Communicated complex findings from data pipelines and ML models to non-technical stakeholders, converting outputs into clear actionable business insights. Adopted microservices architecture and applied load balancing strategies to reduce latency and improve response times under heavy tra
Full Stack Developer at Web Solution
October 1, 2021 - June 30, 2023
Developed and maintained over 10 cross-platform applications and backend systems using React Native, React, Express, and Python with PostgreSQL and Supabase for scalable data management. Integrated intuitive user-facing features with optimized server-side logic ensuring seamless user experiences. Designed and implemented cloud-native architecture on AWS achieving 30% infrastructure cost reduction and 20% boost in system reliability. Streamlined AI-driven workflows by building services in Python to improve model management, data pipelines, and real-time analytics. Used Supabase and PostgreSQL for efficient authentication, data handling, and real-time updates enhancing collaboration and responsiveness across applications. Optimized backend APIs and microservices with Express to deliver fast, reliable endpoints for mobile and web clients. Built intelligent features such as sentiment analysis, text summarization, and recommendation systems improving customer engagement and decision-making
Back End Developer at Life Cell
September 29, 2018 - June 28, 2021
Developed backend logic using Python, Django, and Express.js implementing RESTful APIs, authentication systems, and scalable data models. Designed and implemented low-latency, high-availability applications ensuring reliable performance under heavy traffic. Converted UI/UX prototypes from Figma into React applications creating responsive, reusable components and optimized rendering for smooth user experiences. Customized front-end features using CSS3 and Bootstrap enhancing design consistency and accessibility across devices. Collaborated closely with engineers and designers ensuring seamless integration between backend services and React front-end applications improving delivery speed and communication. Worked collaboratively with data scientists and engineers contributing to a 15% increase in efficiency of the company’s AI-driven trading strategies.

Education

Bachelor Degree in Computer Science at Khmelnytsky National University
April 1, 2013 - March 31, 2017

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Healthcare
    paper HealthBingo

    Developed Health Bingo, a React Native wellness app that gamifies habit-building through social Bingo challenges. Features include real-time group chat, Stripe payments, Supabase backend, and a unique pay-per-challenge monetization model serving organizers and players across iOS/Android platforms

    paper Docovia

    Docovia is a healthcare application that connect doctors and customers.
    In this app, I was responsible for frontend developer, so leveraging react-native, i built a user-friendly and beautiful UX/UI.
    and also, adapt tanstack/react-query to optimize the API calls.