Igor

Igor Romasiuk
Full-Stack Developer
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) Ukraine

[open contact info](look above in the "contact info" section) github.com/igor-romasiuk t.me/igorromasiuk

Summary
Full-Stack Developer with 3 years of experience building production web applications with React, TypeScript,
Next.js, Node.js, and MongoDB. Experienced in developing responsive user interfaces and backend services,
including REST APIs, database integrations, and application performance optimization. Skilled in writing
clean, maintainable code and delivering scalable, reliable web applications.

Experience
Middle Full Stack Developer, SmartFlowLabs 02/2025 – Present
Software development company specializing in embedded Shopify SaaS applications for e-commerce
automation, catalog management, merchandising, and order validation.
Delivered production features across 3 Shopify SaaS applications, helping merchants automate catalog
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generation, merchandising, product sorting and order-validation workflows.
Built data-heavy product and collection workflows supporting stores with thousands of products,
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integrating Shopify Admin GraphQL API, Bulk Operations, Resource Picker and App Bridge.
Created reusable React and TypeScript components with Shopify Polaris and Tailwind CSS, improving
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consistency and accelerating development across all 3 applications.
Improved performance of large product views through virtualization, lazy loading, memoization, query
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caching and component refactoring.
Extended Node.js, Express.js and MongoDB services supporting merchant configuration, business rules and
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asynchronous Shopify operations.
Middle Full Stack Developer, Opinov8 – Mingleego 08/2024 – 02/2025
AI-powered SaaS platform enabling businesses to build intelligent assistants integrated with websites,
messaging channels, and third-party services to automate customer communication and business workflows.
Built React and Next.js interfaces for configuring AI assistants, conversation logic and automated business
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workflows.
Delivered 5+ third-party integrations - including Google Calendar, Gmail, eBay, Shopify and Slack - using
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REST APIs and authentication flows, expanding the actions available to platform users.
Implemented Node.js and Express.js endpoints and PostgreSQL operations supporting new platform
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functionality and external integrations.
Added multilingual support and reusable UI patterns, enabling the product to serve users across additional
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markets.
Junior Frontend Developer, Opinov8 – EnergyAspects 08/2023 – 08/2024
Energy market research consultancy providing market intelligence, analysis, and forecasting for global energy
markets.
Optimized UI performance by fixing rendering bottlenecks and application bugs, improving responsiveness
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by up to 60%.
Diagnosed and resolved frontend performance issues using Chrome DevTools and React Profiler, reducing
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average page load times by 20% across key dashboards.
Wrote maintainable, lint-compliant code following ESLint and Prettier standards.
•

Collaborated with UI/UX designers to develop user interfaces for an internal web-based human resources
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system.
Participated in Agile sprints, resolving blockers and contributing 5+ process and product improvement ideas
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adopted in client releases.

Education
Full-Stack Development, Mate Academy 02/2023 – 08/2023
Hands-on training program focused on modern web development, including JavaScript, React.js, Node.js,
TypeScript, Redux, HTML, CSS, REST APIs, team collaboration, code reviews, and real-world project
development.

Technical Skills
Languages Backend
TypeScript, JavaScript, SQL Node.js, Express.js, REST, GraphQL, Webhooks

Frontend Data & Infrastructure
React, Next.js, React Query, Redux Toolkit, Zustand, PostgreSQL, MongoDB, Redis, Prisma, Mongoose,
Tailwind CSS, HTML, CSS Docker, AWS S3, CI/CD, Git

Languages
English Ukrainian
Intermediate Native