Available to hire
Hi, I’m Dusan Marinic, a Senior Frontend Engineer with over a decade of web development experience, including 9 years building production apps with React and Next.js. I’ve led a team of frontend engineers at an international agency and now work directly with global clients on high-impact B2B projects.
I’m focused on shipping scalable, performant products with clean code and maintainable architecture. I enjoy building scalable design systems, improving performance, mentoring teams, and delivering fast, reliable software to thousands of users.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Language
English
Fluent
Serbian
Fluent
Work Experience
Senior Frontend Developer at B2B Contractor
January 1, 2024 - PresentContract work delivering high-quality React/Next.js apps for startups and international clients. Partnered directly with founders, product owners, and designers to ship features quickly. Scaled apps for scalability, performance, and clean architecture.
Senior Frontend Developer & Team Lead at Cinnamon Agency
January 1, 2024 - October 9, 2025Led a team of 6 frontend developers, established code review standards and mentoring programs. Launched production-ready apps for fintech, media, and healthcare clients. Improved delivery speed by 30% through CI/CD pipelines and reusable component systems.
Frontend Developer at Netcast doo
January 1, 2021 - October 9, 2025Engineered web TV platform features including DVR playback, live EPG, payments, and content discovery. Contributed to both React (web) and React Native (mobile), improving performance and UX.
Co-Founder & Web Developer at Vitamin Studio
January 1, 2019 - October 9, 2025Co-founded a studio and developed 15+ websites and web apps in React and Wordpress for diverse clients. Managed full project lifecycle: client acquisition, design collaboration, development, launch, and maintenance.
Lead Frontend Developer at Universe (Selected Project)
January 1, 2025 - October 9, 2025Owned the entire frontend for a web app + Chrome extension enabling marketing agencies to analyze ads across social platforms. Implemented an account system, payments, ad discovery, and collaboration tools. Optimized performance to handle thousands of ads daily with caching. MVP delivered in under 6 months.
Lead Frontend Developer at Stacklist
January 1, 2025 - October 9, 2025Drove major frontend initiatives for a social bookmarking platform. Led a complete redesign emphasizing modern UI, accessibility, and performance. Improved retention and daily active usage through faster load times and clean UX.
Frontend Developer at Sunbird Messaging App
January 1, 2023 - October 9, 2025Bridged iOS-to-Android messaging compatibility. Implemented secure, real-time chat components and notifications.
Frontend Developer at Bloom Credit
January 1, 2023 - October 9, 2025Automated internal workflows to reduce manual processing time for credit data. Improved platform usability with streamlined dashboards and clear data flows.
Frontend Developer at Vuzz TV
January 1, 2021 - October 9, 2025Developed a video streaming app in Serbia used by 200k+ monthly users. Designed advanced video player with DVR, 7-day EPG, live pause/rewind, and multi-device support. Enhanced subscription flows and improved watch-time retention.
Senior Frontend Developer at B2B Contractor
January 1, 2024 - PresentReleased high-quality React/Next.js apps for startups and international clients on a contract basis. Partnered with founders, product owners, and designers to ship features fast. Scaled apps for scalability, performance, and clean architecture.
Senior Frontend Developer & Team Lead at Cinam on Agency
January 1, 2024 - October 9, 2025Led a team of 6 frontend developers, introduced code review standards and mentoring programs. Launched production-ready apps for fintech, media, and healthcare clients. Improved delivery speed by 30% with CI/CD pipelines and reusable component systems. Clients included startups and enterprise products with 50k–200k+ end users.
React Developer at Netcast doo
January 1, 2021 - October 9, 2025Engineered web TV platform features: DVR playback, live EPG, payments, video club, infinite scrolling content. Contributed to both React (web) and React Native (mobile), improving performance and UX.
Co-Founder & Web Developer at Vitamin Studio
January 1, 2019 - October 9, 2025Developed 15+ websites and web apps in React and Wordpress for diverse clients. Managed full project lifecycle: client acquisition, design collaboration, development, launch, and maintenance.
Lead Developer at AdUniverse
January 1, 2025 - October 9, 2025Owned the entire frontend for a web app + Chrome extension enabling marketing agencies to analyze ads across social platforms. Rolled out account system, payments, ad discovery, and collaboration tools. Optimized performance to handle thousands of ads daily with responsive UI and caching. Executed MVP in under 6 months, enabling agencies to analyze thousands of ads daily.
Lead Frontend Developer at Stacklist
January 1, 2025 - October 9, 2025Drove major frontend initiatives for a social bookmarking platform, focusing on modern UI, accessibility, and performance improvements.
Frontend Developer at Sunbird Messaging App
January 1, 2023 - October 9, 2025Worked on bridging iOS-to-Android messaging compatibility. Implemented secure, real-time chat components and notification features.
Frontend Developer at Bloom Credit
January 1, 2023 - October 9, 2025Automated internal workflows to reduce manual processing time for credit data. Improved platform usability with streamlined dashboards and clear data flows.
Frontend Developer at Vuzz TV
January 1, 2021 - October 9, 2025Developed video streaming app in Serbia used by 200k+ monthly users. Designed advanced video player with DVR, 7-day EPG, live pause/rewind, and multi-device support.
Senior Frontend Developer at B2B Contractor
January 1, 2024 - PresentReleased high-quality React/Next.js apps for startups and international clients on a contract basis. Partnered directly with founders, product owners, and designers to ship features fast. Scaled apps for scalability, performance, and clean architecture.
Senior Frontend Developer & Team Lead at Cinnamon Agency
December 31, 2024 - October 16, 2025Led a team of 6 frontend developers, introduced code review standards and mentoring programs. Launched production-ready apps for fintech, media, and healthcare clients. Improved delivery speed by 30% with CI/CD pipelines and reusable component systems.
Frontend Developer at Netcast doo
December 31, 2021 - October 16, 2025Engineered web TV platform features: DVR playback, live EPG, payments, video club, infinite scrolling content. Contributed to both React (web) and React Native (mobile), improving performance and UX.
Co-Founder & Web Developer at Vitamin Studio
December 31, 2019 - October 16, 2025Developed 15+ websites and web apps in React and Wordpress for diverse clients. Managed full project lifecycle: client acquisition, design collaboration, development, launch, and maintenance.
Lead Developer at AdUniverse
December 31, 2025 - October 16, 2025Owned the entire frontend for a web app + Chrome extension enabling marketing agencies to analyze ads across social platforms. Rolled out account system, payments, ad discovery, and collaboration tools. Optimized performance to handle thousands of ads daily with responsive UI and caching. MVP delivered in under 6 months.
Lead Frontend Developer at Stacklist
December 31, 2025 - October 16, 2025Drove major frontend initiatives for a social bookmarking platform used by thousands of users. Led a complete redesign focusing on modern UI, accessibility, and performance. Improved retention and daily active usage through faster load times and clean UX.
Frontend Developer at Sunbird Messaging App
December 31, 2023 - October 16, 2025Bridged iOS-to-Android messaging compatibility. Implemented secure, real-time chat components and notification features.
Frontend Developer at Bloom Credit
December 31, 2023 - October 16, 2025Automated internal workflows to reduce manual processing time for credit data. Improved platform usability with streamlined dashboards and clear data flows.
Frontend Developer at Vuzz TV
December 31, 2021 - October 16, 2025Developed video streaming app in Serbia used by 200k+ monthly users. Designed advanced video player with DVR, 7-day EPG, live pause/rewind, and multi-device support. Enhanced subscription flows and improved watch-time retention.
Education
at Faculty of Mechanical Engineering, University of Belgrade
January 11, 2030 - October 9, 2025 at Singidunum University, Electrical Engineering
January 11, 2030 - October 9, 2025Studies in Mechanical Engineering at University of Belgrade
January 11, 2030 - October 9, 2025Electrical Engineering at Singidunum University
January 11, 2030 - October 9, 2025Mechanical Engineering studies at Faculty of Mechanical Engineering, University of Belgrade
January 11, 2030 - October 16, 2025Electrical Engineering studies at Singidunum University
January 11, 2030 - October 16, 2025Qualifications
Industry Experience
Software & Internet, Professional Services, Media & Entertainment, Healthcare, Financial Services
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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