Saeid Mohadjer

Saeid Mohadjer

Senior Frontend & Full-stack Developer

+49 176 8826 9966

Freiburg, Germany

Senior Frontend and Full-stack Developer with 15+ years of experience in design and development of responsive websites, web applications, and restful APIs.


  • Experience in design and development of progressively-enhanced mobile-first responsive websites and web applications (SPAs, PWAs, etc.)
  • Expertise in implementing RESTful APIs with authentication (OAuth )and payload validation (JSON Schema)
  • A proponent of separation of concerns and MVC architectural pattern
  • Experience in serverless and edge computing on platforms such as Vercel, Render, and AWS
  • Solid knowledge of Functional Programming and OOP paradigms
  • Strong understanding of request-response life cycle and network related topics such as Cors, Caching, Authorization, Cookies, etc.
  • Solid understanding of JavaScript concepts such as closures, promises, event loop, call stack, web components, etc.
  • Solid knowledge of CSS box model, flexbox, grid, media and container queries, css animation, etc.
  • Solid knowledge of Angular including signals, observables, reactive forms, etc.
  • Solid knowledge of React including JSX, SSR, Suspense, React Router, etc.
  • Experience in setting up CI/CD pipelines using YAML and GitHub Actions
  • Deep understanding of Git
  • Experience with traditional and headless CMS
  • Experience in writing semantic SEO-friendly W3C-valid cross-browser markup
  • Solid understanding of accessibility (a11y) and implementing WCAG 2.1 requirements across large Websites
  • Experience in implementing i18n and support for RTL languages
  • Experience in writing unit tests
  • Experience in integrating 3rd-party libraries (AG Grid, Swiper, Google Maps, etc.)


HTML5, CSS3, JavaScript (ES6+), TypeScript, React, Angular, RxJS, Next.js, Handlebars, Sass, Bootstrap, jQuery, Jest, SVG, JSON, XML
Node.js, Express.js, MongoDB, Mongoose, Contentful, MariaDB, PHP, Yii
JWT, OAuth, jose
GitHub Actions, GitHub API, YAML, NPM Scripts


Visual Studio Code, Atom, Notepad++
Graphic Design
Figma, Inkscape, Pixlr, Photoshop
Axe DevTools, Wave
Jira, Confluence, Git, npm, esbuild, Rollup, Docker, Postman, MongoDB Compass, Sequel Pro
macOS, Windows

Work Experience

2024-present, Senior Frontend Developer, Elio GmbH, Germany
Working on ecommerce Websites and integration of the frontend with backend (PHP/Symfony).
2013-2024, Freelance Frontend Developer, Germany
Collaborated with design studios and interactive agencies on developing and maintaining responsive websites and web applications for clients in various industries (pharmaceutical, banking, insurance, etc.). Some of clients that I worked with are Recall InfoLink, Neoperl, Siedle, Union Investment, Roche, Voestalpine, and Sto, among the others. My responsibilities varied from one project to another, but mainly included:
  • Collaborating with designers on design and implementation of UI libraries
  • Implementing page layouts for large corporate websites
  • Building complex dynamic forms with client-side and server-side validation
  • Building content types for Contentful CMS and writing migration scripts
  • Building map applications using Geolocation and Google Maps API
  • Integrating 3rd-party services such as LiveChat, Google reCAPTCHA, consentmanager, etc.
  • Bug fixing in Jira and other bug tracking systems
  • Accessibility auditing of web applications and websites
  • Building interactive infographics with animation in SVG
  • Writing documentation and guides
2011-2013, Frontend Developer, Virtual Identity AG, Germany
I worked closely with the concept and design team on projects ranging from time-sensitive campaigns to relaunch of large corporate Websites. I was responsible for developing, testing, and bug-fixing of UI components as well as facilitating integration of the frontend with backend (Java, Python, PHP).
2008-2011, Freelance Frontend Developer, Canada
Worked with design and advertising agencies on projects ranging from fast-paced campaigns to award-winning Websites including Webby Honoree for Museum of Vancouver Website and Webby Honoree for University of Toronto Augmented Reality
2007-2008, Senior Interactive Developer, B3 Communications, Canada
Outstanding Achievement for Koloa Landing Website
2006-2007, Interface Developer, Blast Radius, Canada
Worked on projects for Electronic Arts and Canadian Tourism

Personal Projects

  • Tournament Organizer

    Tournament Organizer (SPA without a framework)

    This single page app allows tournament organizers to display and share result of their tournaments. Features include seasons, player's profile, all-time and seasonal rankings as well as individual tournament results. Data fetching is done by JavaScript from MongoDB by invoking Node.js serverless API endpoints and then injecting the fetched data into Handlebars templates to render views on the client side. API authorization for post requests is implemented using JWT inside a middleware. Code on GitHub

  • Website for Slaven Gluscevic

    Website for Slaven Gluscevic

    Designed and built a responsive Website with protected admin panel for tennis trainer Slaven Gluscevic that allows users to register for training courses and tennis camps.

    FrontendTypeScript, HTML5, CSS3, Handlebars
    BackendNode.js, MongoDB
    HostingVercel (serverless), GitHub


Letter of reference, Virtual Identity AG (PDF in German)


English, German (C1), Persian