Purushottam Panchal

Professional Experience

Graduate Teaching Assistant June 2025 - Present

DePaul University, Chicago, IL

Assisting students during Python lab sessions by answering questions and providing guidance to ensure comprehension of course material, improving student understanding by 25%
Gradeding lab assignments and provided constructive feedback in a fair and consistent manner, maintaining a turnaround time of 48 hours to support timely learning progress

Software Engineer June 2022 - June 2024

Persistent Systems, Pune, India

Engineered automated workflows using DevOps tools to streamline processes, reduce manual intervention, and enhance operational efficiency and consistency across multiple environments
Architected and implemented scalable Web APIs using the .NET framework, leveraging best practices to ensure efficient data handling and seamless integration across systems
Worked closely with QA teams to conduct code reviews and design robust unit tests leveraging NUnit and MSTest to achieve a bug reduction rate of 15%, ensuring high application performance post-updates

Software Engineer Intern Jan 2022 - June 2022

Persistent Systems, Pune, India

Contributed to development of .NET Web APIs, optimizing back-end solutions
Led a team of 11 interns through technical development and skill-building
Improved performance by 15% through code refactoring and database query optimization

Persistent Trainee Calendar (Persistent Systems)

.NET Web API, C#, Postman, Azure, Microsoft SQL, Git

Developed .NET Web APIs with JWT authentication, securing access for 1,000+ interns to the calendar system
Achieved 95% unit test coverage using NUnit and Moq, ensuring high code quality and functionality across the application
Contributed in designing and implementing a streamlined CI/CD pipeline using Azure DevOps, optimizing development workflows and accelerating software delivery

Data Load Pipeline (Persistent Systems)

Jenkins, AWS, Python, Shell Script, BitBucket

Engineered Jenkins pipeline to automate the data transfer from AWS S3 to EC2 instances, cutting data load time by 80%, reducing manual errors, and improving overall workflow efficiency and operational performance
Wrote python scripts to handle secure access to cross-accounts and cross-region S3 buckets of different customers, downloading data files and performing clean up and validation operations
Reduced data loading failures by 85% through automation and shell scripts, ensuring accurate data transfers from S3 Buckets to target EC2 Instances

Personal Timeline App (Academic Project)

C#, .NET Core, React TypeScript, CSS, SQLite, Entity Framework

Built a full-stack Personal Timeline app with .NET Minimal API, React, and TypeScript, integrating OAuth for secure user authentication with Google, GitHub, and Twitter
Implemented third-party API integrations like GitHub, Google, etc. to auto-sync user data, using Entity Framework Core for efficient database management
Enhanced security with JWT tokens and dotnet user-secrets for secure storage of API keys and sensitive data

Hot Properties - Real Estate Management System (Academic Project)

Java, Spring Boot, Spring Security, MySQL, Thymeleaf

Architected and developed a Java Spring Boot real-estate management system with multi-role access control, enabling agents to manage 100+ property listings with secure JWT-based authentication and role-specific dashboards
Implemented comprehensive CRUD operations for property listings with image upload functionality and MySQL persistence, reducing data entry time by 40% and streamlining the buyer-agent messaging system for efficient communication
Integrated Spring Security with JWT authentication and role-based access control for admins, agents, and buyers, ensuring fine-grained access permissions and secure user management across the platform

Trading System Simulator (Academic Project)

Java, Object-Oriented Design, Design Patterns

Designed and implemented a simulated stock exchange system demonstrating robust object-oriented design principles and design patterns including Singleton, Facade, Flyweight, and Observer patterns, improving code reusability by 40%
Developed immutable Price class to ensure accurate financial calculations and PriceFactory using Flyweight pattern to optimize memory usage by 35%, guaranteeing single object existence for price values
Implemented real-time market data publication using Observer pattern, enabling instant notifications to traders and facilitating secure data transfer through TradableDTO for enhanced information security

Distributed File Retrieval Engine (Academic Project)

Java, Multithreading, Sockets, Maven, Data Structures

Designed and implemented a multi-threaded client-server file indexing and search engine using inverted index data structure, supporting concurrent clients with thread-safe operations
Developed custom dispatcher pattern and worker threads for scalable processing, enabling real-time search across distributed datasets with word frequency analysis