Preksha Mahajan
SWE Intern @Nielsen || Former Community Organiser @Open Source Chandigarh || C/C++ || Python || Backend Dev || Data Engineering || Public Speaking || BE CSE’26
- Role
- Software Engineer Intern at Nielsen
- Location
- Amritsar, PB, IN
- LinkedIn followers
- 500 followers
About Preksha Mahajan
Preksha Mahajan is working as a Software Engineer Intern at Nielsen while being a Final Year student pursuing a Bachelor of Engineering degree in Computer Science Engineering.She has also served as the Community Organiser at Open Source Chandigarh, a dynamic tech community committed to redefining the Open Source and technology ecosystem in Chandigarh, Punjab region and beyond. Previously, she had served as a Mentor (20••••25) and the Community Lead (20••••24) of Open Source Chandigarh powered by Chitkara University, Punjab, contributing to fostering a collaborative environment for tech enthusiasts and redefining the future of tech.She has delivered multiple talks around Open Source, Programming, Web Development and Community Building. She has spoken at notable events like: DevFest Jalandhar \'24, International Women\'s Day \'25 by GDG & WTM Jalandhar, FOSS United Jalandhar Meetup \'24, MongoDB User Group Chandigarh Meetup \'25, etc.She has been working on various projects using- Languages: Python, C/C++, HTML, CSS, JavaScript- Frameworks: FastAPI, Bootstrap- Tools: Apache Airflow- Databases: MySQL, TrinoSQL, PostgreSQL, SQLite, AWS DynamoDB, MongoDB- Libraries (Python): Numpy, Pandas, Scikit-Learn, Boto3, Aioboto3, Pydantic, PydanticAI etc.Preksha is very passionate about community building, team management and content creation. She also led a revolutionary initiative called #100daysofcodeatChitkara on LinkedIn and Twitter, promoting coding culture and craft among students of Chitkara University.PS: She is also a National level Chess player and represented Punjab in SGFI, 2019.
Experience
Software Engineer Intern
Feb 2025 — Present · Bengaluru, IN
Working in Data Engineering unit of Nielsen One Audience Builder team.• Engineered and deployed a production-grade ETL pipeline (DAG) using Apache Airflow to automate monthly data population from data lake to UI, reducing manual processing time by 85%.• Developed high-performance REST APIs using FastAPI framework serving as critical backend components for the product.• Led migration from SQL to AWS DynamoDB, improving data retrieval speed by 70% and reducing query latency from seconds to milliseconds.• Contributed to successful onboarding of 10+ enterprise clients.• Architected and implemented RESTful CRUD APIs for DynamoDB operations with comprehensive API documentation.• Conducted comprehensive code refactoring across 10+ modules, improving code maintainability score by 40%.
Education
Chitkara University
Bachelor of Engineering - BE, Computer Science Engineering
Spring Dale Senior School
High School Graduate
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