New Delhi, India · ujjwallehri33@gmail.com

I build for the
physical &
digital world.

✦Hi, I'm Ujjwal Lehri. A CS undergraduate specializing in full-stack applications, robust backend APIs, and embedded systems. Blending meticulous design with functional hardware interfaces.

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About Me

  • Who am I?

    I am a Computer Science Engineering student with a strong foundation in full-stack web development, embedded systems, and IoT solutions.

  • What I Do

    Hands-on experience building scalable web applications, integrating hardware with software platforms, and delivering practical technical solutions.

  • My Philosophy

    Delivering practical, user-centric technical solutions. I believe in writing clean code and building products that make a real difference in people's lives.

  • Always Learning

    Currently pursuing my Bachelor of Technology in Computer Science Engineering at USICT, New Delhi — pushing boundaries every single day.

Experience

My professional journey and industry contributions.

Jun 2025 — Aug 2025

Research Intern

AICTE IDEA Lab (GGSIPU)

Delhi, India (Hybrid)

  • Designed and developed an AI-powered dental radiograph analysis system using deep learning and computer vision.
  • Optimized CNN-based models to achieve approximately 90% diagnostic accuracy on clinical imaging data.
  • Implemented multi-class classification capable of detecting 30+ dental conditions, improving diagnostic coverage.
  • Collaborated with researchers and domain experts to translate medical requirements into a deployable healthcare AI solution.
PythonTensorFlowDeep LearningComputer VisionMedical Imaging

2023 — Present

Web Developer

Freelance

New Delhi, India

  • Delivered end-to-end full-stack web applications, handling requirements, development, testing, and production deployment.
  • Built responsive frontend interfaces and scalable backend APIs supporting authentication and business logic.
  • Designed and managed relational and NoSQL databases to ensure data integrity, performance, and scalability.
  • Deployed applications using containerization and modern hosting workflows for reliable production releases.
JavaScriptTypeScriptReactNode.jsFlaskMySQLMongoDBDocker

Dec 2023 — Feb 2024

Software & IoT Intern

Cyberange

New Delhi, India

  • Developed IoT prototypes using Arduino and Raspberry Pi for real-world sensing and automation use cases.
  • Implemented hardware–software integration using Python and Embedded C++ for device control and data processing.
  • Integrated edge devices with cloud dashboards using Node-RED to enable real-time monitoring and control.
  • Tested, debugged, and iterated on embedded systems in collaboration with engineering teams.
PythonEmbedded C++ArduinoRaspberry PiNode-REDSQLGit

Jun 2022 — Jul 2022

Industrial Trainee

Delhi Metro Rail Corporation (DMRC)

New Delhi, India

  • Studied metro rail signaling, train control, and power systems in a large-scale public infrastructure environment.
  • Gained exposure to safety-critical electrical and electronics systems used in mass transit operations.
  • Observed real-world engineering standards, maintenance workflows, and operational reliability practices.
Electrical SystemsElectronics Systems

Selected Works

A curation of recent projects blending design and engineering.

QSKIP — Food Pre-Ordering Platform
Next.jsReactNode.jsPostgreSQL+10

QSKIP — Food Pre-Ordering Platform

QSKIP enables users to pre-order and schedule food based on arrival, syncing kitchen prep in real time. It eliminates queues, reduces wait times, and improves efficiency and sales across high-footfall outlets, from canteens to restaurants, dhabas, street vendors, and franchises.

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PrintX - Print Management System
Node.jsExpress.jsMongoDBMongoose+10

PrintX - Print Management System

Built a full-stack print management system that allows users to upload, manage, and process print jobs seamlessly.

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DNS Server — Custom Network Resolution System
Node.jsNetworkingDNS ProtocolUDP+1

DNS Server — Custom Network Resolution System

Built a custom DNS server that blocks third-party ads, malware endpoints, and phishing sites, while allowing users to maintain and manage a personalized blocklist.

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Dental Detection Model - AICTE Internship
PythonMachine LearningComputer VisionTensorFlow+1

Dental Detection Model - AICTE Internship

Built an AI-powered dental radiograph analysis system using TensorFlow and OpenCV, reducing diagnostic time to under 30 seconds per scan.

Private / Research
Algorithm Visualizer Website
ReactJavaScriptp5.jsHTML+1

Algorithm Visualizer Website

Designed and developed an interactive algorithm visualizer utilizing React and p5.js to demonstrate complex programming concepts in real-time.

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Rooftop Rainwater Harvesting - SIH Hackathon
ReactNode.jsExpress.jsMongoDB

Rooftop Rainwater Harvesting - SIH Hackathon

Developed a comprehensive full-stack web platform using React and Node.js to monitor and optimize rooftop rainwater harvesting systems.

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CSE Schedule Tracker
ReactJavaScriptTailwind CSS

CSE Schedule Tracker

Built a responsive React-based dashboard to centralize and manage academic schedules and syllabus updates for university students.

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Ecommerce Website
FlaskMySQLJavaScriptBootstrap

Ecommerce Website

Developed a custom full-stack e-commerce platform using Flask and MySQL, featuring a responsive frontend built with vanilla HTML/CSS/JavaScript.

View Project

Skills & Toolkit

Technologies I work with to bring ideas to life.

Languages

PythonJavaScriptTypeScriptCC++Java

Frontend

ReactNext.jsTailwind CSSResponsive Web DesignUI Development

Backend

Node.jsExpress.jsFlaskREST APIsWebSocketsServer-Sent Events (SSE)Socket.IO

Databases

PostgreSQLMySQLMongoDBRedis

ORM & Data Access

PrismaORM

Auth & Security

JWTOAuth 2.0RBACRate Limiting

Testing

JestPytestUnit TestingIntegration Testing

DevOps

DockerDocker ComposeNginxCI/CD Pipelines

System Design

MicroservicesEvent-Driven ArchitectureAsync Job Queues (BullMQ)Horizontal ScalingLoad Balancing

Cloud

AWS (EC2, Lightsail, S3)Azure (Virtual Machines, Blob Storage)Cloudinary

IoT & Embedded

ArduinoESP MicrocontrollersRaspberry PiComputer VisionQR Code Systems

Dev Tools

GitGitHubNode-REDBullMQ

Soft Skills

Problem SolvingAnalytical ThinkingCommunicationTeam CollaborationDebugging & TroubleshootingCritical ThinkingTime ManagementAdaptability

Contact

Reach out to me.

Ready to build
your next big
innovation?

Whether it's a full-stack web app or an IoT-based solution, I'm ready to help you bring your vision to life.