WORK EXPERIENCE
Mateo Martinjak / Full-Stack Software Engineer
Frontend Developer
// July 2022 - Present- Worked on dozens of mid-sized projects
- Constant feedback loop with clients and product managers
- Excellent collaboration with the design team
- Led development of modern web interfaces
APEX Token Airdrop Platform
"Designed a web interface for token distribution to 200,000+ users with advanced blockchain wallet integration"
Lead Frontend Developer
Designed and built a modern web interface for APEX to distribute tokens to existing users. Created a comprehensive solution featuring an advanced pre-phase calculator, a user-friendly wallet connection wizard, and a powerful distribution management system for administrators.
Achievements
- • Designed a web interface for token distribution to 200,000+ users with advanced blockchain wallet integration
- • Instant eligibility checks with automated fraud prevention
- • Real-time claim tracking through websockets
- • Built an admin dashboard for easy rule adjustments
- • Simplified registration with popular browser wallet support
Tech Stack
React TypeScript Next.js Tailwind CSS Zustand Wallet Integration
Thespian Website
"3x user reach with the new modernized website"
Lead Frontend Developer
Development of a modern frontend for our agency website using Next.js. Created a performant, SEO-friendly website with integrated marketing services and user engagement tracking features.
Achievements
- • Development of a modern frontend for our agency website using Next.js
- • Integrated marketing services for user engagement tracking
- • 100% SEO-friendly with statically generated pages
- • 3x user reach with the modernized web experience
Tech Stack
React TypeScript Next.js Tailwind CSS SEO Optimization Analytics Integration
Plastopak Website
"Transforming ideas into digital experiences"
Frontend Developer
Developed a modern, responsive website for Plastopak, a plastic packaging manufacturer with 30+ years of industry experience. Created a comprehensive product catalog showcasing their sustainable packaging solutions, implemented a contact form for customer inquiries, and built a multilingual interface to serve their international client base.
Achievements
- • Increased online inquiries by 35% through improved user experience
- • Enabled international market expansion with multilingual support
- • Showcased company's sustainability initiatives to attract eco-conscious clients
Tech Stack
Next.js React i18n Tailwind CSS Contact Form
Component Library - React Aria
"Drastically reduced project development time for current and future projects"
Lead Frontend Developer
Developed a modern, accessible component library for our agency built with React Aria and Tailwind CSS. Created a comprehensive design system with SCSS variables, implemented semantic color naming conventions, and built theme support for light and dark modes.
Achievements
- • 60+ reusable, accessible components built
- • Used accessibility focused React Aria as backbone for the library
- • Built using latest Tailwind + TS for easy future management
- • 100% integrated Storybook to provide developers with live component documentation
- • Drastically reduced project development time for current and future projects
Tech Stack
React Tailwind CSS React Aria SCSS Storybook Figma TypeScript
OpenScience - PubWeave
"Created a collaborative WYSIWYG editor with real-time synchronization for academic publishing"
Lead Frontend Developer
Developed PubWeave, an innovative platform for academics to showcase, share, and collaborate on research papers and preprints. Built a sophisticated WYSIWYG block-style editor based on Editor.js with custom real-time collaboration functionality using WebSockets.
Achievements
- • Created a collaborative WYSIWYG editor with real-time synchronization for academic publishing
- • Open-source, block-style, rich text editor with real-time article collaboration
- • Integrated blockchain Cardano payments system through browser API
- • Created a custom real-time collaboration system for document editing
- • Implemented block-level user presence indicators for concurrent editing
- • Designed an intuitive interface for academic content creation
Tech Stack
React TypeScript Tailwind CSS Redux Ruby on Rails Editor.js WebSockets Real-time Collaboration Blockchain Integration
DCK Media eLearning Platform
"Migrated data for 40k+ medical staff & reduced server costs by 70% through the platform"
Lead Frontend Developer
Elevated DCK media's eLearning experience by replacing their outdated system with a custom platform that simplifies user management, enhances learning paths, and scales with their growing user base. Successfully migrated data and certificates for 50,000 medical professionals across 1600 organizations and clinics.
Achievements
- • 70% decreased server maintenance costs
- • Implemented magazine shipment distribution system
- • 50,000+ medical professionals use the platform on a daily basis
- • Onboarded 8000 users to Alpha version
- • Precise course progress tracking
- • 1,600 organizations & clinics now benefit from an improved platform
Tech Stack
React MOBX React Router Playwright TypeScript
Hrvatski kinološki savez (HKS)
"Revitalized a 20+ year-old dog championship management platform"
Lead Frontend Developer
Revitalized a 20+ year-old dog championship management platform by migrating from an outdated system to a modern web application with improved user experience and performance.
Achievements
- • Migrated from an outdated platform to a modern Next.js solution
- • Simplified data fetching using useQuery
- • Revitalized a 20+ year-old dog championship management platform
Tech Stack
React TypeScript Next.js Tailwind CSS useQuery API Integration
Present July 2022
