Roman Pietrowski
Roman Pietrowski

Senior MERN Stack Developer

Actively looking · Member since 3 Jul 2025
Message
Location
Poland
Desired salary
Unspecified
Work preference
Full Time
Experience level
Not set

About

Professional summary

I am an experienced and reliable MERN Stack Developer with over 7 years of remote work experience building scalable web and mobile applications. I am proficient in React, Node.js, TypeScript, MongoDB, and modern development workflows. I excel at collaborating in global Agile teams, optimizing front-end performance, and delivering features on deadline with clean, maintainable code. My core competencies include frontend technologies like TypeScript, React, Next.js, and backend technologies such as Node.js and Express.js. I have a strong background in developing and maintaining applications, integrating APIs, and automating deployment workflows. I am passionate about creating user-friendly applications and continuously improving my skills to keep up with industry trends.

Skills

18 capabilities

Experience

Career history

Senior MERN Stack Developer Shopify

- Developed and maintained merchant-facing apps using React, Next.js (TypeScript + Redux), and Tailwind CSS.
- Integrated GraphQL APIs for dynamic real-time data fetching, reducing load times by 20%.
- Refactored legacy UI components to modern frontend standards, reducing UI bugs by ~15%.
- Collaborated with design teams to deliver new product features on schedule in 90%+ of sprints.
- Automated deployment workflows using GitHub Actions, Vercel, and CI/CD, reducing deployment time by 40%.

Front-end Developer Revolut

- Built scalable frontend modules using React, Next.js, and Redux for internal and user-facing tools.
- Contributed to Node.js/Express backend services integrated with MongoDB and GraphQL.
- Launched 4+ core product updates within fast-paced Agile sprints, meeting all deadlines for each release.
- Improved front-end with Next.js, reducing build time by 25% through static site generation and optimization.
- Supported cloud deployments using AWS, Docker, and CI/CD workflows.

Developer Freelance

- Remote freelance projects across Europe and North America.
- Designed and developed responsive, mobile-first UI components using React and Tailwind CSS.
- Collaborated with UX and accessibility teams to reach full WCAG 2.1 compliance, achieving ADA certification for flagship product.
- Built and deployed React Native apps for mobile clients, enhancing user experiences for clients across Europe.
- Managed deployments via GitHub and Vercel, reducing deployment times and manual intervention by 30%.

Education

Learning history

University of Warsaw

B.S. in Computer Science

Developed a capstone project: 'Real-Time Chat Application' using Node.js, Socket.io, and MongoDB. Graduated with Honors in the top 10% of the class.

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