Mohammad Zobair Hosain Fahim

Software Engineer

@ The WOS Germany GmbH

About

I'm a Software Engineer with 2+ years of experience building scalable web and mobile applications using React.js, Next.js, and Flutter. Currently working remotely at The WOS Germany GmbH, I specialize in full-stack development, REST API optimization, and Agile methodologies.

Key Achievements

▸Developed and maintained 15+ production features for Lentho.com, serving 5,000+ daily active users
▸Optimized REST API performance, reducing average response time by 40%
▸Implemented secure OTP-based authentication, improving login success rate by 25%
▸Established code review standards, reducing production bugs by 30%

I thrive in collaborative environments where I can deliver high-quality solutions through clean code, thorough testing, and continuous improvement. My approach combines technical expertise with a focus on user experience and system performance.

Strong believer in technology-agnostic problem solving. While I specialize in React, Next.js, and Flutter, I'm highly adaptable and can quickly learn new languages and frameworks like Golang, Rust, or any technology the project demands.

Experience

May 2023 - Present
Software Engineer
The WOS Germany GmbH
Mönchengladbach, Germany (Remote)
- •Developed and maintained 15+ production features serving 5,000+ daily active users
- •Optimized REST API performance, reducing average response time by 40%
- •Implemented secure OTP-based authentication, improving login success rate by 25%
- •Established code review standards across 6-member team, reducing production bugs by 30%
FlutterNext.jsTypeScriptREST APILaravelAWS
Oct 2022 - Nov 2022
Software Development Intern
Diligite Limited
Chittagong, Bangladesh
- •Built 5+ reusable React.js UI components for file sharing application
- •Collaborated using Git, Jira, and Agile workflows including sprint planning and code reviews
React.jsNode.jsGitJira

Projects

LENTHO

LiveProprietary

Multi-tenant food ordering & restaurant management platform

Professional Project

Visit Site

Production storefront for the LENTHO platform — a multi-tenant food ordering system serving both customers and restaurant operators. Built with Next.js App Router and internationalized for German and English markets, with a dedicated business dashboard for restaurant management alongside the customer-facing ordering experience.

Key Achievements:

✓Multi-locale support (DE/EN) via next-intl
✓Separate customer and restaurant dashboards
✓Sentry error monitoring in production
✓Firebase push messaging integration

Next.jsTypeScriptTailwind CSSZustandSWRReact Hook FormZodRadix UIDocker

Team Hub

Live

Real-time collaborative team workspace

Full-Stack Project

Visit Site

Code

Multi-tenant collaborative workspace where teams manage announcements, goals, action items, and analytics in real time. Built as a Turborepo monorepo with an Express 5 API and a Next.js 16 front end, it features live presence, a drag-and-drop kanban, rich-text announcements, and an immutable audit log written transactionally with every mutation.

Key Achievements:

✓Real-time sync via Socket.io workspace rooms with live presence dots
✓Optimistic UI on every mutation- kanban drag, reactions, comments with snapshot rollback
✓Append-only audit log written inside the same DB transaction as each mutation
✓JWT in httpOnly cookies with refresh-token rotation, hashed at rest
✓Tiptap rich-text announcements with @mentions, reactions, and comments
✓Analytics dashboard with Recharts charts and CSV export

Next.jsReactExpress 5PrismaPostgreSQLSocket.ioTanStack QueryZustandTailwind CSSTurborepo

Marketplace Workflow System

Live

Personal Project

Visit Site

Code

Full-stack project marketplace with role-based access control, real-time bidding, and ZIP deliverable management. Buyers post projects, solvers bid and deliver work, with atomic cascade operations ensuring data consistency throughout the workflow.

Key Achievements:

✓Role-based access (Admin / Buyer / Solver)
✓Atomic bid acceptance with cascade state machine
✓Presigned MinIO URLs — backend never proxies files
✓JWT in memory + httpOnly refresh cookie (XSS-safe)

FastAPINext.jsPostgreSQLMinIODockerTypeScriptTanStack Query

Digital Prescription Generator

Proprietary

Personal Project

Full-stack prescription management system with Medex database integration. Enables doctors to search 10,000+ medicines by generic or brand name and generate digital prescriptions with optimized caching and database queries.

Key Achievements:

✓10,000+ searchable medicines
✓Sub-100ms medication search response
✓Efficient caching mechanisms
✓PDF prescription generation

React.jsNode.jsMySQLREST API

Personal Portfolio

Live

Personal Project

Code

Responsive portfolio website built with Next.js and Tailwind CSS, achieving 95+ Lighthouse performance score. Features modern UI/UX design patterns, dark mode support, smooth animations, and interactive mouse-tracking effects.

Key Achievements:

✓95+ Lighthouse performance score
✓SEO optimized
✓Interactive mouse-tracking gradient
✓Fully responsive design

Next.jsTypeScriptTailwind CSSVercel

Urban Garden Companion App

Mobile plant care app for urban gardeners

Design Project

Visit Site

A mobile plant care app that helps urban gardeners discover, track, and care for indoor and outdoor plants. It uses camera-based space scanning to analyze sunlight, temperature, and humidity, then recommends suitable plants. Designed for city dwellers and beginner plant parents who want personalized care reminders and plant suggestions.