8617228703
SUJAY KUMAR MONDAL
System Engineer | Python Developer
Full-stack Python Developer with over 2 years of experience
building scalable backend systems with FastAPI and modern web
applications using Next.js. Experienced in designing RESTful APIs,
integrating third-party services, and building performant frontend–
backend architectures. Strong background in database design, API
security, and clean, maintainable code. Proven track record of
delivering production-ready solutions in fast-paced startup
environments.
Kolkata, India
WORK EXPERIENCE
SKILLS
Python Programming
System Engineer
FastAPI
Next JS
Surelia Infosystems Private Limited
08/2023 - Present,
Newtown, Kolkata
Database Management(SQL)
DevOps Practice(CI/CD)
Achievements/Tasks
Developed and maintained RESTful APIs using FastAPI,
improving application performance and scalability across
multiple projects
Redis Caching
HTML, CSS, Javascript
API Development & Integration
Trobleshooting & Debugging
Basic Django
Designed and optimized database schemas using
PostgreSQL and MySQL, leading to a 25% improvement
in query efficiency
Collaborated with client teams to implement clean API
contracts, enabling seamless integration and reducing
bugs during deployment
PERSONAL PROJECTS
Developed multiple independent microservices using
FastAPI, enabling modular architecture and improving
maintainability and scalability of the overall system
Chatbot Project:
Django-React (04/2025 - Present)
Developed and deployed multiple FastAPI-based
microservices and built full-stack applications using
Next.js with FastAPI, enabling modular architecture and
improving system consistency.
Full-stack AI Chat Application (FastAPI+ React): Architected and
developed a modern chatbot web application using FastAPI for
backend REST APIs and React (with TypeScript) for frontend UI,
enabling users to register, authenticate (JWT), and interact with a
personalized AI assistant through a responsive chat interface.
Secure User Experience and Data Management: Implemented
secure authentication with JWT, user-scoped chat history, and
server-side filtering to ensure each user only sees their own data,
complemented by a structured backend that integrates with Groq
AI APIs to generate contextual chatbot responses.
EDUCATION
MCA
Brainware University
Auth Project:
06/2021 - 06/2023,
88.74%
(08/2024 - 09/2024)
Developed a secure user authentication system using FastAPI,
OAuth2, and JWT, enabling token-based access control with hashed
credentials via bcrypt
B.S.C in Computer Science
Syamaprasad College, Calcutta University
06/2018 - 06/2021, 65%
Integrated MySQL database with SQLAlchemy ORM to manage user
data and authentication states, including Google Client ID and
Secret validation
E-Commerce & Market Data Platform:
(01/2025 - 02/2025)
Built a full-stack FastAPI microservices platform
It combines e-commerce functionalities with real-time market data
analytics
Implemented modularity using microservices architecture, MySQL,
and Redis Streams
INTERESTS
Building Projects
Exploring Open Source Platforms