Abu Sayed

Web Developer

About

Hi, I'm Abu Sayed — a full-stack capable web developer (frontend-leaned) with 4+ years of experience building modern, scalable, and user-friendly web applications. I specialize in React, Next.js, and JavaScript, with strong skills in building responsive interfaces and delivering seamless user experiences.

Over the past few years, I have worked as a Front-End Developer at Spekter GmbH, where I built and optimized complex UI components, integrated advanced features, and ensured cross-device responsiveness using React, Next.js, and Tailwind CSS. I've worked on scalable web applications with focus on performance and user experience, including implementing intricate UI components and interactive map functionalities.

I have hands-on and growing backend experience with Node.js, Express, and MongoDB, and I build full-stack projects to keep strengthening both sides. I'm actively applying for front-end focused full-stack positions, with deep expertise in modern frontend (React, Next.js, React Native, TypeScript, REST APIs, testing) and the ability to own features end-to-end.

Experience

Sep 2021 - Apr 2025

Front-End Developer

Spekter GmbH•Full-time

Herzogenaurach, Bavaria, Germany • Remote

  • Built interactive map-based UI with React, OpenLayers, and Mapbox, handling multiple layers, sensor data, weather radar, and predictive analytics with smooth performance. ( https://app.starkregen.de/ags/09262000 )
  • Developed responsive, reusable components using Tailwind CSS and Recharts for visualizing complex datasets.
  • Implemented real-time macOS-style notifications, ensuring fast, lag-free updates.
  • Built a JIRA-style drag-and-drop issue board for an internal sensor and task management tool.
ReactNext.jsTypeScriptTailwind CSSJavaScriptOpenLayersMapboxRechartsGit
Feb 2021 - May 2021

Software Developer

ResoluteAI.in•Internship

Bangalore Urban, Karnataka, India

  • Worked on FaceGenie, a face-detection attendance app for offices, schools, universities, and factories, providing analytics on presence, late arrivals, and location-based activity. ( https://resoluteaisoftware.in/facegenie )
  • Built React frontend with Material-UI, creating responsive, real-time monitoring interfaces.
  • Integrated Firebase Realtime Database and experimented with Node.js/MongoDB for local server handling.
JavaScriptReactMaterial-UIFirebaseNode.jsMongoDBGitAgile

Projects

Starkregen Alarmsystem thumbnail
Starkregen AlarmsystemLive production

Risk management and early warning system for heavy rainfall, with interactive maps, sensor data, weather radar, and predictive analytics for municipalities and authorities.

ReactNext.jsTypeScriptTailwind CSSOpenLayersMapboxRecharts
Lithos Bike E-commerce Platform thumbnail

A full-stack e-commerce platform for premium mountain bikes featuring product catalog, user authentication, warranty management system, and comprehensive product specifications with geometry data for cycling enthusiasts.

Next.js 15React 19TypeScriptTailwind CSSMongoDBNextAuth.jsZod
Service Booking System thumbnail

A full-stack service booking platform that allows users to book appointments with service providers such as salons, dental clinics, and beauty parlors. Features multi-role authentication, staff-based scheduling, real-time availability checking, comprehensive booking management, and admin dashboard with analytics.

Next.js 15React 19TypeScriptTailwind CSSNode.jsExpress.jsMongoDBJWTTanStack Query