Abhinav Chauhan

Sr. Software Developer III, Careerbuilder India – Noida, Uttar Pradesh

August 2019 - October 2024

Led system design of Careerpath.com addressing the challenge of handling both non-contextual user initiated actions like resume upload & parsing during the interaction with LLM in a single page application environment.
Reduced the processing time of SMS and email notification job queues in Drupal based Careers.com from over 2 minutes to less than 10 seconds by simplifying large & inefficient SQL queries, using PHP's persistent connection and re-indexing MySQL database tables.
Optimized "Related Searches" feature of Careerbuilder.com job portal through post-build initialization of YAML serialized API data into system memory itself, thus gaining 90% performance improvement by avoiding higher latency recursive Redis calls.
Developed and integrated a custom JSON Web Token (JWT) system to secure the microservices sharing candidates data between recruiter facing lead management system (vTools) and in-house CBATS.
Implemented an application-wide caching solution to replace the redundant costly API calls supporting critical functionalities of Careerbuilder.com like job search, job application, and tracking. It brought down the persistently high failure rate of services with random spikes upwards of 80% request failures down to negligible, as measured in Loggly.
Engineered a complex Drupal module that seamlessly integrated knockout questions into job application forms, addressing the technical challenge of enabling custom knockout logic, robust database schema, and the contextual front-end presentation based on applicant's choices with support for diverse field types - text, list, checkboxes, and multi-value fields.

Sr. Software Developer, Proprof – Noida, Uttar Pradesh

July 2016 – July 2019

Implemented an automated system to purge old, redundant and spam products' data reducing database size by up to 20 GBs improving performance of Stylehive.com & Thisnext.com E-commerce portals by 15% and cutting platform costs by more than 50%.
Led the initiative to build from the ground up the Proprofs Project, a SaaS offering focusing on a scalable application and database architecture. It enabled enterprise level project workflow management, time tracking, and reports generation.
Led a small team of two developers to build an in-house ed-tech SaaS suite providing online quiz evaluation functionality with a client facing backend to create and configure custom questions, tests and evaluation methods.
Designed and implemented a distributed caching layer using Redis that reduced database load by 40% leading to significant cost reduction of up to 60% across high-traffic E-commerce platforms Stylehive.com & Thisnext.com.
Developed an analytics module using PHP 7, JavaScript/jQuery that provided real-time insights into user behavior, resulting in data-driven UI/UX improvements that increased customer conversion rates by 10%.
Established a CI/CD pipeline using PHPUnit and GitHub Actions with automated testing, which decreased deployment time by 70%, bugs by more than 60%, resulting in a 50%+ reduction in customer-reported bug and performance issue tickets.

Jr. Software Developer, NexGen Innovators – New Delhi, India

November 2013 – Jun 2016

Developed an ERP system for schools and universities in core PHP to support efficient students' record management, attendance tracking, fee management, and financial report generation.
Engineered a secure authentication system implementing OAuth 2.0 and JWT for single sign-on capabilities across multiple applications, enhancing both security and user experience.
Designed and deployed an OpenCart-based E-commerce portal. Integrated third-party APIs and payment gateways with an integrated retailer-facing backend to manage products and dynamic visualizations of sales, inventory, and other metrics using JavaScript.
Created a website migration tool as a WordPress plugin to facilitate the transfer of product data, customer information, and order history from legacy systems to modern e-commerce platforms.
Collaborated with UX designers to implement responsive front-end templates using HTML5, CSS3, and JavaScript frameworks, ensuring seamless functionality across multiple devices and browsers.

Summary

Skills

Experience

Projects

Homecloud | Python

RAG for API Documentation | Python, Langchain, Open Source LLM

Education