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Vitalii Marych
Full-Stack Developer
Email: [open contact info](look above in the "contact info" section)
Phone: [open contact info](look above in the "contact info" section)
Location: Lviv, Ukraine

SKILLS

Programming Languages: JavaScript, TypeScript
Frontend: React, Redux, React Query, TanStack Table, TanStack Form
Backend: Node.js (NestJS), REST API, gRPC, Microservices
Databases: PostgreSQL, MySQL, Redis
Messaging & Data: Kafka, CDC (Debezium)
Tools: Docker, AWS (S3, EC2), Git, Claude Code, Claude Skills, Claude CoWork, MCP

MAIN RESPONSIBILITIES

• Development of backend and frontend features based on technical specifications
• Implementation of scalable APIs and services
• Integration with third-party services and external systems
• Data processing and performance optimization
• Monitor and upgrade existing systems

EDUCATION

Lviv Polytechnic National University (2021–2025)

LANGUAGES

Ukrainian — Native
English — B1 (Intermediate)


WORK EXPERIENCE

Food Ordering Platform — Full-Stack Developer (6 months)

Architecture:
Service-oriented backend with REST APIs and async processing

Technologies:
Node.js (NestJS), React, PostgreSQL, Redis

Responsibilities:
• Developed backend APIs for order processing and user management
• Implemented dynamic forms for order customization
• Built reusable frontend components and UI modules
• Implemented data tables and UI for order management
• Integrated external notification services

Key Contributions:
• Contributed to development of order processing system and workflows
• Implemented async processing for background tasks
• Improved frontend performance for handling large data lists
• Built reusable component system



DAO Analytics Platform — Full-Stack Engineer (1.5 years)

Architecture:
Data-heavy backend with analytics pipelines

Technologies:
Node.js, PostgreSQL, React

Responsibilities:
• Developed backend services for data processing and analytics
• Built frontend dashboards and data visualization components
• Optimized database queries and data aggregation
• Implemented data aggregation logic for analytics
• Optimized database queries for large datasets
• Worked with caching strategies for improving response time

Key Contributions:
• Processed large-scale datasets and improved performance
• Built scalable data pipelines for analytics
• Reduced response time for heavy queries

Challenges:
Optimizing performance for large datasets

Real Estate Platform — Full-Stack Engineer (2+ years)

Architecture:
Distributed microservices (~400 repos), event-driven system

Technologies:
Node.js (NestJS), Kafka, gRPC, React, PostgreSQL

Responsibilities:
• Developed backend microservices
• Implemented communication via Kafka and gRPC
• Built frontend features using React including micro-frontend architecture (Module
Federation)
• Integrated external services and data sources

Key Contributions:
• Implemented event-driven architecture patterns
• Improved performance in high-load systems
• Built adapter layer for external integrations
• Worked with Kafka and async data processing
• Worked with Module Federation for scalable frontend architecture

Challenges:
Managing complexity of distributed system