AdUniverse
Ad intelligence platform for TikTok and Meta. Browse, track, and analyze competitor ads at scale.
ReactViteTypeScript+3 more
Details
$
Dušan
Marinić, Senior Frontend Engineer, React & Next.js
$
Senior Frontend Engineer
· React & Next.js
Belgrade, Serbia · Remote available
or reach out → dusan.marinic.developer@gmail.com
Beyond the code.
“I build React apps the way a designer would, with intent.”
I've spent 10+ years at the intersection of design and engineering. Running a creative studio, leading teams, and shipping React products across SaaS, fintech, healthcare, and sports. I care about clean architecture, performance, and code that holds up under pressure. When projects call for it, I bring in trusted collaborators to expand capacity without compromising on quality.
Experience
10+Building for the webClients served
30+Across industriesProjectsProjects delivered
40+From MVPs to scaleEngineers led
7As Team LeadCraft Over Template
Every component gets thought through from the ground up. Spacing, hierarchy, interaction, states. Good interfaces are built from these deliberate micro-decisions.
Performance Is a Feature
Performance gets built in from day one. I optimize from architecture decisions down to bundle size.
Led, Not Just Coded
Led a team of 7 engineers at Cinnamon. Code standards, sprint planning, architecture decisions. The full picture.
From MVP to Scale
Built products from day zero and shipped features on platforms with large existing userbases. I know when to move fast and when to invest in the right call.
Skills.
Technologies and practices I work with daily.
Core Stack
The foundation I build every project on.
ReactNext.jsTypeScriptJavaScriptTailwind CSSFramer Motion
6 technologies
Experience.
Where I've worked and what I've shipped.
Senior Frontend Developer, B2B Contractor
FreelanceIndependent / Freelance·2024 - PresentCurrent
Building React and Next.js products for startups. From architecture decisions to delivery, with focus on performance and clean code.
ReactNext.jsTypeScriptVercel
Senior Frontend Developer & Team Lead
Full-timeCinnamon Agency·2021 - 2024
Led a team of 7 engineers across 10+ client products. Involved from pre-sales and design alignment through to delivery and deployment. Set Git and Next.js standards across the team.
ReactNext.jsTypeScriptStorybookAgile
React Developer
Full-timeNetcast doo·2019 - 2021
Built React and React Native products across streaming, hospitality, and internal tooling for a group of companies. Contributed to platforms with 200k+ monthly users.
ReactJavaScriptCSSRedux
Co-Founder & Web Developer
FounderVitamin Studio·2016 - 2019
Co-founded a full-service creative studio. Delivered 15+ projects spanning web development, graphic design, digital marketing, and video production.
JavaScriptHTMLCSSWordPress
Journey.
The path that shaped how I build.
2014
2014
The Beginning
First lines of code
Started with HTML and CSS out of pure curiosity. Built my first webpage in Notepad++ and immediately knew this was it.
2015
2015
Going Deeper
JavaScript clicked
Moved beyond static pages into real interactivity. First freelance clients, first deadlines, first lessons in what it means to ship something real.
2016
2016
Entrepreneurship
Co-founded Vitamin Studio
Started a creative web studio with a partner. Learned that building products is 20% code and 80% communication, trust, and delivery.
2018
2018
The Shift
React changed everything
Went deep on React and never looked back. Component thinking rewired how I approach every UI problem.
2021
2021
Leadership
Team Lead at Cinnamon
Led 7 engineers for the first time. Learned that the best code you write as a lead is often the code you help others avoid writing.
2024
2024
Independence
Going independent
Left agency life to work directly with product teams and startups. More ownership, harder problems, better work.
2026
2026
What's Next
Looking ahead
Open to senior and lead B2B engagements. Looking for product teams where architecture, performance, and craft actually matter.
Stack evolution
2014–2015
HTMLCSSJavaScriptjQuery
2016–2018
ReactWordPressComponent thinking
2021–2024
Next.jsTypeScriptTeam LeadArchitecture
React since 2016. Still the right call.
Selected Work.
Products and platforms I've built or led.
Featured project
Stacklist
SaaSSaaSJoined the product early and eventually led a complete frontend redesign and optimization. Built core UX flows for saving, organizing, and discovering content.
Next.jsTypeScriptReact QueryHeadless UITailwind CSS
More projects
Bloom Credit
FinTech dashboard for credit report management and financial health monitoring.
Next.jsTypeScriptReact Query+2 more
Details
[ open to new projects ]
Got a project in mind?
Currently open to new B2B engagements. If you're building something in React or Next.js and need a senior developer, let's talk. For larger engagements, I work with a trusted network of collaborators.
Download Resume
PDF • Updated February 2026