Dimitrios Chatziioannou

Frontend Engineer with 5+ years of experience building and shipping high-performance web applications with React, TypeScript, Next.js, TanStack Query and Tailwind CSS. Proven track record delivering complex web applications, including a multi-tenant SaaS partner portal for the food and hospitality industry, an AI app builder, and a live interactive game show web platform, alongside customer-facing products, data-driven dashboards, and internal tools. Comfortable across the full frontend lifecycle from requirements gathering, through building clean interfaces, to production release, with strong collaboration skills across designers, stakeholders and cross-functional teams.

Also experienced in backend development with Nest.js and MongoDB, and creator of Fab UI, an open-source React component library. Looking to bring this experience to a challenging Frontend or Full-Stack role in an innovative, product-focused team.

Frontend Engineer at KMA TECH / PLACES APP (2023-03 – Present)

Develop, ship and maintain customer-facing products and data-heavy web applications for Places App, including the Partners Portal and Appy, an AI app builder. Work with React, TypeScript, Next.js, Tailwind CSS, Zustand, React Query and Vite to deliver new features, support product planning and improve release processes in a fast-paced environment.

• Owned frontend architecture and delivered production features across three flagship web platforms
• Built a complex, permission-based multi-tenant SaaS partner portal for the food and hospitality industry, delivering 24 feature modules using React, Next.js, TypeScript, Tailwind CSS, Zustand, React Query and AWS, including subdomain isolation, white-label branding and multi-account authentication
• Managed complex application state using React Query, Zustand and URL state, with full i18n support
• Built and launched Appy, a no-code AI app builder SaaS platform, with React, TypeScript, TanStack Router, Tailwind CSS and Vite, with a real-time SSE-powered editor, multi-tenant authentication, subscription and credit workflows, admin tooling, and support for React Native apps via Expo
• Created internal tools, automations and documentation to improve team efficiency, streamline workflows, and strengthen CI/CD and release processes
• Worked directly with business stakeholders and partners to gather requirements, shape priorities and translate ideas into production-ready solutions
• Contributed to backend delivery with Nest.js, MongoDB and Mongoose, building and enhancing API endpoints

Frontend React Developer at POSITIVELY DISTINCTIVE MEDIA / ENLIVON (2021-04 – 2023-02)

Built and delivered Frontend Applications in a fast-paced environment, including Ruthless, a live interactive gameshow platform that enables real-time audience participation. Worked with React, Redux, Tailwind CSS, Framer Motion and WebRTC to develop customer-facing product features and a supporting dashboard for managing live gameplay.

• Built Ruthless, a live interactive game show web app platform developing React components, features and real-time user experience powered by WebRTC
• Designed and launched a dashboard application from inception using React and Next.js, enabling live game control, show administration and improved operational efficiency
• Created visual and image assets in Figma and implemented responsive UI styling with Tailwind CSS to support a smooth user experience
• Took ownership of critical project work and maintained delivery under tight deadlines, including stepping into acting Lead Developer responsibilities when needed

Freelance Web Developer at THREE QUARTERS DEVELOPMENT (2019-05 – 2021-04)

Delivered tailored web solutions for a diverse client base, managing projects from discovery through deployment. Built high-performance applications with JavaScript, React, Redux, Tailwind CSS and Framer Motion, with a focus on usability and client goals.

• Designed and launched a second-generation online store for Astroneir Design, supporting continued growth in exclusive streetwear and art poster sales
• Developed the e-commerce site for Social Outkast, a leading group of Greek influencers, winning the project through a competitive selection process and delivering ahead of schedule
• Produced a commercial website for Ikos Construction, owning the project end-to-end from architecture and UI implementation to Contentful CMS integration
• Improved delivery efficiency for clients by automating deployments and using modern hosting platforms including Netlify and Vercel
• Previously gained valuable experience in hospitality, retail, customer service and store management, developing strong client-facing and operational skills in fast-paced environments