Summary
Overview
Work History
Education
Skills
Projects
Languages
Websites
Timeline
Generic

SAYAN MONDAL

Kolkata

Summary

Full Stack Developer with 5+ years of experience in backend and Frontend engineering and cloud infrastructure. Expertise in building high-performance APIs and automating workflows, resulting in a 50% increase in operational efficiency at Drivado. Proficient in Node.js, Express.js, MongoDB, React, Docker, Nginx, and Kubernetes. Focused on developing scalable solutions that enhance user engagement and streamline processes in dynamic environments.

Overview

5
5
years of professional experience

Work History

IT Manager

Drivado
Kolkata
07.2022 - Current
  • Empowered global ground transportation with Drivado, a B2B service enabling seamless chauffeur service in 240 cities worldwide. Developed with Express.js, MongoDB, Node.js, and React, it achieved smooth and efficient operations, revolutionizing the industry.
  • Built a real-time vehicle tracking system using Node.js and Redis with custom algorithms and Turf.js for GPS denoising. Enabled smooth frontend animations with real-time ETA and distance calculation.
  • Created a dynamic extranet pricing platform for affiliates with zone-based pricing models, including one-way, hourly, and long-distance fares using polygon matching and spatial logic.
  • Developed a modular API wrapper covering search, unique ID generation, pricing logic, booking, and cancellation workflows.
  • Integrated Redis Pub/Sub to handle high-concurrency scenarios and ensure data consistency without failure, and also created an internal queue system that processed 10.8 million+ data.
  • Architected infrastructure on Kubernetes with DigitalOcean using Docker, NGINX, and GitHub Actions, capable of handling 300+ requests/second, later deployed in Hetzner VPS for staging.
  • Optimized backend APIs with concurrency principles, reducing response latency and improving stability under load.
  • Integrated payment provider Razorpay to complete the billing process.
  • Implemented a robust pricing engine with layered logic (company/user-level markup/discount, night rates, priority zones, event-based rules), providing accurate pricing responses under 700ms.
  • Automated billing, invoicing, and voucher systems resulting 50% boost in operational efficiency.
  • Improved search performance by 70% through custom indexing and optimized queries, and the addition of caching using Redis.
  • Tripled booking speed and doubled user engagement through system enhancements, measured by Grafana past and present metrics.

Co-founder & Developer

RISING LEAFS
Kolkata
01.2020 - 08.2022
  • Pioneered RBAC, a classroom-based education platform for college and private tutors, co-founding a successful venture incubated by WEBEL-BCC&I.
  • Implemented RBAC system for user authentication and authorization, ensuring secure access.
  • Designed a user-friendly interface for seamless classroom interactions and enhanced learning experiences.
  • Managed platform infrastructure for scalability, conducted user testing, and acquired new partnerships for platform growth.
  • A classroom-based education platform for college and private tutors, co-founding a successful venture incubated by WEBEL-BCC&I.

Education

B.Tech - Computer Science & Engineering

Techno International Batanagar
Kolkata
01.2022

Skills

  • Nodejs
  • Expressjs
  • Redis
  • MongoDB
  • Docker
  • Kubernetes
  • NGINX
  • Turfjs
  • GitHub Actions
  • Reactjs
  • Redux
  • Redux Saga
  • Tailwind css
  • React hook
  • CI/CD Pipelines
  • DigitalOcean
  • Git
  • Team leadership
  • Rust
  • Go
  • LLM

Projects

  • Career guide application that allows students to learn anything based on their current state of studying, built with the MERN stack.
  • Short Article with voice sharing application with social media activity.
  • Art gallery application.
  • A modern project management platform designed for growing startups, creative agencies, and fast-moving teams. Wrkstack offers clean UI, smart workflows, and essential collaboration tools, delivering enterprise-level value at a fraction of the cost.
  • An AI-powered LLM-based platform that helps developers learn faster by recommending tech paths, curating resources, and generating smart notes like a personal AI tutor that grows with you.

Languages

Bengali
First Language
English
Intermediate (B1)
B1

Websites

Timeline

IT Manager

Drivado
07.2022 - Current

Co-founder & Developer

RISING LEAFS
01.2020 - 08.2022

B.Tech - Computer Science & Engineering

Techno International Batanagar

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SAYAN MONDAL