Hire the Best TypeScript Developers
in Greece

Building professional websites to describe your business or work and fully customize with your idea with all new features and amazing designs also if you have your design I can convert it into a real website what I will provide to you? - multiple pages website - all the new features - fast-loading website - convert your design to a real website why working with me? - Expert in semantic markup, advanced CSS features, and modern Javascript with nextjs 14. - responsive design to make your app look good on mobile, tablet, and desktop. - clean code to make sure there are no errors in the future also, I am new on Upwork and I am looking to build long-term relations with clients If you are interested in working together contact me ASAP!

Senior Full-Stack Engineer specializing in React, Next.js, and TypeScript - with a track record of shipping production SaaS applications that are fast, maintainable, and built to scale. Over the last 5+ years I've led frontend architecture and full-stack delivery for SaaS startups across Europe, working closely with founders, product teams, and engineering leads to turn complex requirements into clean, performant products. 🎯 WHAT I'VE DELIVERED ✅ Led the full architectural rebuild of a credit management SaaS platform — reduced the codebase from 150,000 to 40,000 lines (73% reduction) while cutting initial load time from 4 seconds to 1 second. ✅ Built a dual-platform web + Electron application with 85% shared codebase, deployed to research centers including Tecnalia, with real-time WebSocket data flowing from hardware sensors to the UI. ✅ Drove a 20% increase in conversion on a career-tech SaaS that grew to 50,000+ users and helped close €1M in funding across two rounds. 🛠 WHAT I BRING TO YOUR PROJECT ✔ Deep expertise in React, Next.js, TypeScript, and Tailwind CSS for modern, performant frontends ✔ Full-stack capability with Node.js / Express and any TypeScript backend framework ✔ Production experience with AWS, Vercel, Docker, PostgreSQL/MySQL, and CI/CD pipelines ✔ Strong focus on performance optimization — code splitting, eliminating request waterfalls, bundle size, Core Web Vitals ✔ Experience leading small engineering teams and establishing frontend standards 👤 I'M A GOOD FIT IF YOU'RE ▸ A SaaS founder or CTO who needs a senior engineer to own frontend architecture ▸ A team with a slow, bloated, or hard-to-maintain frontend that needs rescuing ▸ Building a data-heavy dashboard, internal tool, or B2B product where UX and performance actually matter ▸ Looking for someone who can move between frontend and full-stack as the project demands I work best with teams that value clean code, clear communication, and shipping things that actually work in production. 📩 If that sounds like your project, send me a message - I'd love to hear what you're building.

Thank you for taking the time to explore my profile. Here's a quick overview of why I'm the right fit for your project needs: I bring a wealth of experience as a Javascript/Typescript/Blockchain engineer, with specialized skills in React, Next.js, Node.js, Tailwind CSS, SaSS, Redux, MongoDB, and Web3 for robust full-stack development. My expertise also extends to mobile app creation using React Native and Flutter. Known for my positive outlook and unwavering energy, I excel in maintaining clear communication in every scenario. Have designs ready in Figma, Adobe XD, InVision, etc.? I'm adept at turning those into flawlessly coded implementations. My journey includes co-founding and managing eclubs, a startup that has reached thousands of users in Athens. Additionally, I contributed significantly to another application that successfully secured $200K in funding, showcasing my ability to lead projects from idea to investment. My roles have varied across the board, from Project Owner on diverse tech ventures, CTO of two startups (AI), to Tech Lead on an NFT marketplace. These experiences have equipped me with a unique blend of skills, enabling me not just to code, but to strategically align technological solutions with business objectives. While I'm ready to align with your vision, I'm also prepared to suggest alternative strategies when I see an opportunity for improvement. How I Can Assist: - Crafting state-of-the-art web (using JamStack/React) or mobile apps, selecting the best technology (Flutter or React Native) based on your project's requirements. - Revitalizing, updating, or troubleshooting your existing applications. - Offering strategic advice and proposing potential enhancements to your project, drawing from my extensive background. - Converting your design concepts (in Figma, Adobe XD, InVision, etc.) into pixel-perfect code or enhancing existing designs. What to Expect Working with Me: 1) Constant availability and swift responses. 2) Immediate project commencement and rapid execution. 3) Full commitment to your project. 4) Deep industry insights. 5) Broad programming knowledge and experience in navigating the startup ecosystem. I'm eager to discuss how I can contribute to your app or business. Let's schedule a time for a video call or chat to better understand your project's needs, how I can cover all development aspects, or dive deeper into discussions about your project's inception, growth, or enhancements.

I specialize in building fast, maintainable web applications with TypeScript, React, Tailwind CSS, and modern backend tools (Node.js / Deno), with a focus on e-commerce development. I work with teams to develop and improve apps, whether you need help implementing features, tightening the codebase, or expanding development capacity. Technologies I use • Core languages: TypeScript, JavaScript • Frontend: React, Vue.js, Tailwind CSS, Material UI • Backend & data: Node.js, Deno, PostgreSQL • Real-time & integrations: Socket.IO, Stytch • Workflow & tools: Git, Docker, Figma What I deliver • Clear, frequent communication with regular progress updates so you always know what’s done and what’s next • Clean, reusable code and tested, production-ready features

Hi, I'm Stefanos. I specialize in Typescript & Python programming and I'm constantly involved in Web & Mobile Development and AI Projects with AI Agents or ML. Im fluent with Postgres Databases, working with ORMs writing efficient and error proof Typescript & Python code. Specifically, I'm familiar with React and NextJS Framework for the Web, and React Native with Expo in the mobile. Worked extensively with AWS, Cloudflare and Google Cloud Platform for Microservices and orchestrating systems and workflows. Last but not least, leveraging AI capabilities gave me superpowers as the right prompts give the right answers fast, thus making the whole process of learning and developing faster and higher quailty. My ML projects helped me develop a strong grasp of web scraping and data cleansing using Python's pandas library. I'm also familiar with the scikit-learn package, enabling me to work with machine learning algorithms effectively. Working extensively with JSON data and APIs, I've gained valuable experience in handling and extracting information from various sources. Over the past years, I've been actively engaged in a fascinating project focused on developing a predictive model for a virtual football and basketball betting game. This project has allowed me to showcase my abilities in building web scrapers and crawlers, utilizing both synchronous and asynchronous techniques. I'm passionate about leveraging my skills to solve real-world problems and continuously seek new challenges. I'm excited to explore opportunities where I can contribute my knowledge in web scraping, data analysis, and predictive modeling to make a meaningful impact.

I'm a senior software engineer based in Athens with 10+ years shipping production systems. Stacks I work in daily: TypeScript · React · Vue 3 · Next.js · Node.js · Python · Django · FastAPI · PostgreSQL · React Native · OpenAI / Anthropic APIs · LangChain · vLLM · Vite How I work: - Written-first. You'll get notes, diagrams and plans before I touch code. - Honest scoping. If your problem is smaller than you think, I'll tell you. - Async-friendly. EU hours, but I overlap meaningfully with US East and APAC. If you're a founder, CTO, or engineering lead with a codebase that needs senior judgement, not just more hands, message me. I'll tell you within 48 hours whether I'm the right fit.