Hello, I’m
Fayaj Nakib
Full-stack engineer with 2 years of production experience building enterprise-grade web apps. Specialises in IoT-integrated fleet systems, REST API architecture, and payment integrations — with DevOps depth across Docker, Kubernetes, and CI/CD.
About Me.
I build systems designed to stay reliable — not just to ship fast, but to work flawlessly when things get complicated.
Working on Cassetex's IoT fleet platform taught me what “production-ready” really means. When GPS telemetry, real-time vehicle tracking, bKash payment webhooks, and multi-tenant access control all need to work together without failure, there's no room for shortcuts. That environment shaped how I think about architecture, error handling, and observability from day one.
I started in competitive programming — four ICPC Asia Preliminary rounds trained me to break hard problems apart under pressure. That mindset carries into every system I design. Outside engineering, I coordinate film and photography events and shoot documentary work, which keeps me thinking about composition and clear storytelling — surprisingly useful when designing APIs.
What I care about
Work Experience.
My professional journey building products and systems in production environments.
Associate Software Engineer
- ▸Designed a modular REST API (30+ endpoints) with multi-guard auth: Laravel Sanctum for admin/franchisee, PIN-based driver auth, API-key auth for IoT devices, and Microsoft Azure AD SSO — with fine-grained RBAC using Spatie Permissions and franchisee-scoped query isolation
- ▸Optimized battery telemetry queries using SQL window functions to fetch latest BMS metrics per device in a single pass across a 40+ table schema, eliminating N+1 patterns and reducing payload size for large fleet datasets
- ▸Integrated bKash payment webhooks with idempotent reconciliation logic and structured webhook log models; built HERE Technologies geofencing with real-time point-in-polygon violation detection dispatched via Laravel queue jobs
- ▸Implemented Observer-driven async processing and queue workers for 1,000s of daily cabinet telemetry and battery-swap events — including automatic command dispatching to physical charging cabinets
- ▸Built interactive React dashboards with Leaflet map visualization, Chart.js/Recharts analytics, context-based permission-gated rendering, and real-time notification delivery across admin, franchisee, and driver roles
Junior Software Engineer
- ▸Developed client-facing web applications with Laravel (PHP) backend and React / Next.js frontend — from requirements gathering through to deployment in an Agile environment
- ▸Refactored three legacy modules using cleaner object-oriented patterns, eliminated N+1 query issues, and introduced targeted indexing — measurably improving API response times
- ▸Resolved production bugs under time pressure and maintained clear technical documentation
Featured Work.
A selection of projects I've built — from web applications to research work and systems design.
FleetBook — Multi-Tenant Vehicle & Fleet Management SaaS
Production-grade multi-tenant SaaS using a modular monolith architecture with bounded contexts (Vehicles, Trips, Payments, Finance, Location, Notifications) communicating through domain events. Financial data modelled in integer minor units; real-time location via Laravel Reverb WebSockets; geofencing via PostGIS spatial queries.
DevBoard — Developer Project & Task Tracker
Multi-tenant project management platform with Kanban boards, workspaces, role-based access control, JWT authentication, and queue-based notifications. Full CI/CD pipeline to managed services — frontend on Vercel, backend on Render, database on Neon.
IELTS Preparation App
Developed an application with reading, writing, and vocabulary modules; implemented Firebase authentication and database for seamless user experience.
I-SORT (Research)
An IoT-enhanced autonomous product sorting robot for eCommerce. Designed an automated sortation system for warehouse operations, improving sorting accuracy and throughput. Reduced manual labor requirements and optimized space usage while providing real-time product tracking.
Human Disease Prediction
Built an SVM-based system predicting diseases with 85% accuracy from symptom input. Utilized machine learning algorithms to provide accurate medical predictions.
Car Dealer Web App
Developed an online car inventory and sales management platform with comprehensive features for managing vehicle listings, sales transactions, and customer interactions.
Self Portfolio
A modern, responsive portfolio website showcasing skills, projects, and experience. Built with Next.js and featuring smooth animations, dark mode, and a clean, professional design.
My Skills.
Technical expertise I've developed across languages, frameworks, and tools.
Backend Development
Databases
Engineering Practices
Language
Frontend Development
DevOps & Cloud
Data Science & ML
Soft Skills
Education.
Academic qualifications and the institutions that shaped my foundation.
B.Sc.(Engg) in Computer Science and Engineering
H.S.C: Science
S.S.C: Science
Certifications.
Professional certificates and courses from leading institutions.
Honors & Awards.
Recognition received for academic excellence and extracurricular achievements.
Get In Touch.
Have a project in mind or want to chat? I'm open to new opportunities and collaborations.
Reach me directly via any of these channels:
Send a Message
Ready to build something great?
I specialize in scalable web applications and production-ready systems. Let's collaborate and bring your vision to life.