Mark

MARK HORBAICHUK
Full-Stack Developer

Lviv, Ukraine | [відкрити контакти](див. вище в блоці «контактна інформація») | LinkedIn

SUMMARY

Full-stack developer with hands-on experience in React, Node.js, Shopify, and AWS. I build fast,
scalable apps with clean architecture and a focus on real-time features. I enjoy turning complex
problems into simple, user-friendly solutions — especially in product teams where code directly
impacts the business.

WORK EXPERIENCE

Full-stack developer, JetBase May 2024 - Present
Built and maintained Shopify applications using React, Polaris, Node.js, and AWS
Managed cloud infrastructure with AWS Lambda, S3, DynamoDB, API Gateway
Implemented CI/CD pipelines, reducing deployment time by 60%
Developed WebSocket-based real-time features for auction popcorn bidding

Full-stack developer, ArtCodeVision Oct 2022 – May 2024
Maintained and upgraded React/Node.js web apps, optimized PostgreSQL queries, reducing
execution time from 10s to 300–400ms on key endpoints
Integrated payment systems, implemented Sentry monitoring and automated deployment
workflows
Provided customer support, bug fixing, and database optimization
Mentored junior developers and occasionally led a small team (1–2 people) to deliver critical
features or resolved high-priority issues

HARD SKILLS
Languages & Frameworks: TypeScript, JavaScript, React.js, Nest.js, Redux Toolkit, RTK Query, Redux-Saga
Backend & Databases: Node.js, PostgreSQL, DynamoDB
Cloud & DevOps: AWS (Lambda, S3, API Gateway, RDS, VPC), Docker, Heroku, SST, CI/CD pipelines
APIs & Realtime: REST APIs, GraphQL, WebSockets
Platforms: Shopify (Polaris, Admin API), Expo

EDUCATION

Bachelor’s in Computer Science Sep 2020 - May 2024
Lviv State University of Life Safety
Relevant coursework: Web Development, Algorithms, Databases, Cloud Computing

LANGUAGES

Ukrainian — Native
English — B1 (Intermediate)

ADDITIONAL INFORMATION

AWS Skill Builder badges: Cloud Practitioner, Solutions Architect, Serverless Developer
Based in Lviv, Ukraine — open to relocation and remote work