PROFILE//BIOGRAPHY & DOSSIER

A LITTLEABOUT ME.

Web Developer · Design Advocate · System Builder

Transforming creative ideas into fast, responsive, and meaningful digital experiences with Swiss typographic discipline.

PORTRAIT ARCHIVEISSUE / 2026
Sajjad Hossain Jim
SAJJAD HOSSAIN JIM
LOCATIONMirpur, Dhaka, Bangladesh 1216
DISCIPLINESWeb Apps · Design Systems · IoT
STATUSOpen to Opportunities

“I'm a passionate web developer focused on building modern, accessible, and user-friendly web experiences.”

// ENGINEERING WITH INTENTION

My work centers around the idea that digital products can be both meticulously engineered and visually unforgettable. I treat code not merely as instructions for a computer, but as a craft that directly shapes human interaction.

Over the past 3+ years, I have worked across the modern JavaScript and TypeScript stack, specializing in React, Next.js, and design token architecture. My approach blends the precision of Swiss graphic posters with the ergonomics of modern component systems.

In addition to frontend and full-stack software, I have a deep passion for IoT and Embedded Systems. Working directly with microcontrollers like Arduino R3, ESP32, and NodeMCU has given me a rare first-principles understanding of memory constraints, asynchronous event loops, and hardware interfacing—qualities that make my web applications exceptionally lean and performant.

IOT & EMBEDDED SYSTEMS PROJECTS
// HARDWARE × FIRMWARE LAB
MICROCONTROLLERS
Arduino Uno R3ESP32 (Wi-Fi + BLE)NodeMCU (ESP8266)
SENSORS & INPUTS
IR Infrared SensorsSonar Ultrasonic (HC-SR04)Soil Moisture Probes
ACTUATORS & SWITCHING
Micro-Servos (SG90/MG995)5V Relay ModulesSubmersible DC PumpsPiezo Buzzers
PROJECT 01//Touchless Automation

Smart Dustbin

An automated contactless waste management system engineered for hygienic, hands-free operation. Utilizing ultrasonic sonar echo timing and infrared sensors, it calculates hand distance in real-time, smoothly actuating an automated servo lid mechanism.

Touchless proximity detection calibrated within a 20cm obstacle range
Timed 5-second hold state with automatic smooth servo-driven closure
Optimized power-saving idle current for extended standalone battery life
Hardware Equipment Deployed
Arduino Uno R3Sonar Sensor (HC-SR04)IR SensorServo Motor
PROJECT 02//Smart Agriculture

Automatic Irrigation System

An intelligent automated soil hydration system. Continuously samples volumetric moisture content and automatically triggers a 5V relay-driven submersible water pump whenever soil moisture drops below critical hydration thresholds.

Continuous analog soil impedance sampling with threshold calibration
Debounced relay activation preventing pump electrical chatter
IoT cloud telemetry readiness via ESP32 / NodeMCU Wi-Fi connectivity
Hardware Equipment Deployed
ESP32 / NodeMCUSoil Moisture Sensor5V Relay ModuleDC Water Pump
PROJECT 03//Scheduled Dispenser

Automatic Pet Food Server

A smart automated pet feeding system engineered to dispense calibrated meal portions on programmed intervals or sensor demand. Incorporates infrared bowl-clearance verification and sound alerts to notify pets at feeding time.

Anti-jam rotational servo mechanism dispensing precise portion sizes
IR obstacle detection preventing over-dispensing when bowl is full
Acoustic frequency buzzer signal alerting pets when food is served
Hardware Equipment Deployed
Arduino Uno R3Continuous Servo MotorIR Proximity SensorAcoustic Buzzer
PROJECT 04//Perimeter Security

Thief Detector & Alarming System

A dual-verification intruder detection and perimeter defense system. Combines invisible infrared tripwires with sonar distance measurement to calculate boundary breaches, triggering instant security sirens without false alarms.

Dual-sensor fusion (IR + Sonar) eliminating single-source false alarms
Microsecond hardware interrupt response upon unauthorized perimeter trip
High-decibel emergency buzzer and perimeter security alert triggers
Hardware Equipment Deployed
ESP32 / Arduino Uno R3IR SensorSonar SensorHigh-Decibel Siren
CORE PRINCIPLES// FOUR PILLARS
01 //

Clean, Typed Code

Strict TypeScript, modular component boundaries, and sensible abstractions that make codebases enjoyable to scale.

02 //

Swiss Typographic Eye

Respect for proportion, intentional whitespace, and editorial rhythm that elevates interfaces from functional to memorable.

03 //

Speed as a Feature

Optimized asset pipelines, minimal JavaScript payloads, and zero layout shifts for an instant, responsive feel.

04 //

Accessible by Default

Semantic HTML, proper ARIA landmarks, and keyboard focus states so every user enjoys equal digital dignity.

EXPERIENCE & MILESTONES// CAREER TRAJECTORY
2024 — PRESENT

Frontend Engineer

Independent & Contract Architecture · Remote

Building production Next.js web applications, headless design systems, and responsive customer-facing experiences for modern companies.

  • Implemented full-scale component libraries with Tailwind CSS and Radix primitives
  • Streamlined rendering performance to consistently achieve 98+ Lighthouse audits
  • Established automated CI workflows for TypeScript and lint compliance
2023 — 2024

React Developer

Digital Product Studio · Dhaka, Bangladesh

Collaborated with cross-functional design and engineering teams to transform Figma prototypes into accessible, responsive React interfaces.

  • Integrated complex REST APIs and optimistic state management using React hooks
  • Refactored legacy UI components reducing client-side bundle size by 35%
  • Mentored junior developers on semantic HTML and keyboard accessibility
2022 — 2023

Junior Web Developer

Creative Tech Agency · Dhaka, Bangladesh

Developed responsive web templates, client dashboards, and interactive landing pages utilizing modern JavaScript and CSS.

  • Delivered over 15 client web projects on schedule
  • Pioneered component reusability guidelines across the team