I am a full-stack JavaScript engineer with 3.5+ years of commercial experience building and maintaining modern web applications, primarily in e-commerce and complex business platforms. I've worked in teams of various sizes—from solo contributions to cross-functional teams of up to 15 engineers—and been involved through the full development life cycle, from requirement clarification and feature delivery to release and post-production support. On the backend, I’ve worked with high-load systems, Node.js, Express.js, REST/GraphQL, and databases like PostgreSQL, MySQL, and MongoDB. On the frontend, I focus on improving page load times, user experience, and responsive design, while collaborating closely with designers, QA, and product stakeholders. I also contribute to automated testing, release processes, and continuous improvement of development workflows.

Roksolana Marusiak

I am a full-stack JavaScript engineer with 3.5+ years of commercial experience building and maintaining modern web applications, primarily in e-commerce and complex business platforms. I've worked in teams of various sizes—from solo contributions to cross-functional teams of up to 15 engineers—and been involved through the full development life cycle, from requirement clarification and feature delivery to release and post-production support. On the backend, I’ve worked with high-load systems, Node.js, Express.js, REST/GraphQL, and databases like PostgreSQL, MySQL, and MongoDB. On the frontend, I focus on improving page load times, user experience, and responsive design, while collaborating closely with designers, QA, and product stakeholders. I also contribute to automated testing, release processes, and continuous improvement of development workflows.

Available to hire

I am a full-stack JavaScript engineer with 3.5+ years of commercial experience building and maintaining modern web applications, primarily in e-commerce and complex business platforms. I’ve worked in teams of various sizes—from solo contributions to cross-functional teams of up to 15 engineers—and been involved through the full development life cycle, from requirement clarification and feature delivery to release and post-production support.

On the backend, I’ve worked with high-load systems, Node.js, Express.js, REST/GraphQL, and databases like PostgreSQL, MySQL, and MongoDB. On the frontend, I focus on improving page load times, user experience, and responsive design, while collaborating closely with designers, QA, and product stakeholders. I also contribute to automated testing, release processes, and continuous improvement of development workflows.

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Experience Level

Expert
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Work Experience

Full-Stack JavaScript Engineer at Clover Dynamics
November 1, 2021 - April 1, 2023
Delivered full-stack solutions across multiple greenfield projects (Enneg ix, Interview Pals, Mangroovy, Mintant) shaping architecture and implementing features from scratch to improve UX and platform functionality. Designed and implemented backend APIs and database schemas (PostgreSQL, MySQL, MongoDB; Prisma ORM; Sequelize; GraphQL; REST/RESTful APIs; tRPC). Implemented frontend with React, Next.js, Storybook, Gatsby; improved page load times; collaborated with designers, QA, and product stakeholders. Maintained system stability and led bug fixes; contributed to code reviews and team knowledge sharing.
Full-Stack JavaScript Engineer at Clover Dynamics
July 1, 2023 - June 1, 2025
Delivered full-stack solutions across multiple greenfield projects and led architecture improvements; optimized Next.js app performance (30-40% faster page loads; Lighthouse scores 97+). Built and maintained monitoring system for 360+ websites; automated health checks; reduced manual monitoring by ~80% and enabled proactive issue detection. Implemented end-to-end testing via Cypress, integrated into deployment pipeline (~620 tests); reduced regression testing effort by >90% and shortened release validation times. Re-architected legacy ERP backend from Ruby on Rails to Next.js + NestJS for improved maintainability and scalability; ensured reliable data flows and scalable services.

Education

Bachelor of Computer Science at Lviv Polytechnic National University
September 1, 2018 - July 1, 2022

Qualifications

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Industry Experience

Software & Internet

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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