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Ujjwal Pathak

SDE I @ Darwinbox | Java, Springboot, Node.js, AWS, MongoDB | Building Scalable Systems | Backend Developer | Open Source Contributor | Prev @ Culinda Inc

Hyderabad

3+ years of work experience

Darwinbox
Jul 20251 yr 2 mosPresent

→ Refactored the Add Candidate workflow for recruiters, reducing PIs and IBs → Wrote sync crons for Atlas Search Indexing and resolving other data sync issues. → Resolved 25+ production issues and internal bugs for the recruitment module. → Covered 18,000+ functional lines using PHPUnit, achieving over 99% code coverage across the module.
Darwinbox
Jan 20256 mosJun 2025

→ Took inspiration from DocuSign’s SES (Simple Electronic Signature) workflow and built a lightweight in-house e-signature tool for sending and collecting signed documents using cryptographic techniques for data integrity. → Logged IP addresses, timestamps, and user actions for audit trails and basic validation, with support for parallel and sequential signing flows across multiple signing modes. → Supported dynamic placeholders in PDFs for personalized bulk personalization like auto-filling names, dates, initials, designations, and more. → Built an automated quiz platform to generate and deliver AI-curated quizzes with minimal manual effort, helping train employees on company policies, culture, news, and updates. → Designed for high engagement with gamification elements, and fully automated the curation, scheduling, delivery, and scoring of quizzes. → Leveraged Google RSS feeds, internal HR policies, and website data to extract context and generate quiz questions using GPT-4o.
Oppia Foundation
Oct 20243 mosDec 2024

Remote

→ Oppia is a platform for creating educational content for primary school students aged 7 to 14. → Wrote frontend tests in Jasmine to maintain quality and robustness across new features. → Implemented a language toggle in the embedded-player, enabling language switching for Oppia course content. → Added functionality to temporarily unpublish stories without deleting translations, improving flexibility in the CMS. → Fixed minor bugs like prerequisite skills appearing blank and a confusing dropdown in the skill editor.
Culinda Inc.,
Jan 20241 yrDec 2024

Frisco, Texas, United States

→ Built RecRoid.com, primarily focusing on backend, automation, and API integrations with the frontend. → Analyzed AI-based interview recordings using Hume AI across 20+ metrics, for candidate assessments. → Developed auto-job-apply bots for 5+ job portals, saving time by automating the job application process. Automated the bots to run daily Cron jobs using GitHub Actions. → Migrated web scraping bots from Selenium to Puppeteer, increasing scraping speed by 40%. → Deployed bots on Cloud Functions and browserless infrastructure, integrating OpenAI for tailored job application responses. → Extracted hidden recruiter details from a job portal, to automate cold emails with tailored cover letters. → Added promo code functionality for discounts and free trials, integrating Razorpay and Stripe payment gateways.
Wikimedia Foundation
Nov 20237 mosMay 2024

San Francisco Bay Area

→ Streamlined program deletion workflow using React.js and Ruby on Rails, cutting course deletion time by 40%. → Setup weekly checks to send reminder emails to course creators about pending addition of teaching assistants. → Wrote comprehensive feature tests using RSpec library to ensure robustness and reliability. → Migrated update training content process to Sidekiq to free up resources on the main request thread. → Modernized 50+ legacy Font Files icons to SVG format, accompanied by clear guidelines for username selection, reducing username change requests.
Exponance Twirltree LLP
Jun 20233 mosAug 2023

Remote

→ Developed Staff Attendance System by designing and building RESTful APIs reducing manual work. → Implemented a comprehensive permissions-based access control system, safeguarding data integrity and minimizing unauthorized access and increased data security. → Enhanced system security by integrating JWT into the authentication process, providing secure and seamless user authentication.
GitHub
@ujjwalpathaak

Ujjwal’s AI Stack

antigravity
antigravity
codex
codex

Education

Jaypee University of Information Technology

Bachelor of Technology - BTech, Computer Science Engineering

Jaypee University of Information Technology

20214 yrs2025

Senior Secondary (XII)

Mayoor School - India

20201 yr2021

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Headline

SDE I @ Darwinbox | Java, Springboot, Node.js, AWS, MongoDB | Building Scalable Systems | Backend Developer | Open Source Contributor | Prev @ Culinda Inc

About

👋 Hi, I’m someone who loves turning ideas into scalable, production-ready systems. I’m currently part of the engineering team at Darwinbox (Hyderabad), contributing to an enterprise grade HRMS platform used by thousands of real users. Over the past 6+ months, I’ve gained experience working on distributed systems, API design, and cloud deployments that power large-scale applications in production. My core stack includes Java, Node.js, AWS, and MongoDB, and I enjoy building the backend side of products but won't mind getting my hands dirty by doing some CSS. Looking forward to connect with you!

Location

Hyderabad

AI stack

antigravity

codex

Work experience

Software Development Engineer I at Darwinbox, Jul 2025 - Present · 1 yr 2 mos, → Refactored the Add Candidate workflow for recruiters, reducing PIs and IBs → Wrote sync crons for Atlas Search Indexing and resolving other data sync issues. → Resolved 25+ production issues and internal bugs for the recruitment module. → Covered 18,000+ functional lines using PHPUnit, achieving over 99% code coverage across the module.

Product Development Intern at Darwinbox, Jan 2025 - Jun 2025 · 6 mos, → Took inspiration from DocuSign’s SES (Simple Electronic Signature) workflow and built a lightweight in-house e-signature tool for sending and collecting signed documents using cryptographic techniques for data integrity. → Logged IP addresses, timestamps, and user actions for audit trails and basic validation, with support for parallel and sequential signing flows across multiple signing modes. → Supported dynamic placeholders in PDFs for personalized bulk personalization like auto-filling names, dates, initials, designations, and more. → Built an automated quiz platform to generate and deliver AI-curated quizzes with minimal manual effort, helping train employees on company policies, culture, news, and updates. → Designed for high engagement with gamification elements, and fully automated the curation, scheduling, delivery, and scoring of quizzes. → Leveraged Google RSS feeds, internal HR policies, and website data to extract context and generate quiz questions using GPT-4o.

Open Source Contributer at Oppia Foundation, Oct 2024 - Dec 2024 · 3 mos, Remote, → Oppia is a platform for creating educational content for primary school students aged 7 to 14. → Wrote frontend tests in Jasmine to maintain quality and robustness across new features. → Implemented a language toggle in the embedded-player, enabling language switching for Oppia course content. → Added functionality to temporarily unpublish stories without deleting translations, improving flexibility in the CMS. → Fixed minor bugs like prerequisite skills appearing blank and a confusing dropdown in the skill editor.

Full Stack Developer Intern at Culinda Inc.,, Jan 2024 - Dec 2024 · 1 yr, Frisco, Texas, United States, → Built RecRoid.com, primarily focusing on backend, automation, and API integrations with the frontend. → Analyzed AI-based interview recordings using Hume AI across 20+ metrics, for candidate assessments. → Developed auto-job-apply bots for 5+ job portals, saving time by automating the job application process. Automated the bots to run daily Cron jobs using GitHub Actions. → Migrated web scraping bots from Selenium to Puppeteer, increasing scraping speed by 40%. → Deployed bots on Cloud Functions and browserless infrastructure, integrating OpenAI for tailored job application responses. → Extracted hidden recruiter details from a job portal, to automate cold emails with tailored cover letters. → Added promo code functionality for discounts and free trials, integrating Razorpay and Stripe payment gateways.

Open Source Contributer at Wikimedia Foundation, Nov 2023 - May 2024 · 7 mos, San Francisco Bay Area, → Streamlined program deletion workflow using React.js and Ruby on Rails, cutting course deletion time by 40%. → Setup weekly checks to send reminder emails to course creators about pending addition of teaching assistants. → Wrote comprehensive feature tests using RSpec library to ensure robustness and reliability. → Migrated update training content process to Sidekiq to free up resources on the main request thread. → Modernized 50+ legacy Font Files icons to SVG format, accompanied by clear guidelines for username selection, reducing username change requests.

Full Stack Developer at Exponance Twirltree LLP, Jun 2023 - Aug 2023 · 3 mos, Remote, → Developed Staff Attendance System by designing and building RESTful APIs reducing manual work. → Implemented a comprehensive permissions-based access control system, safeguarding data integrity and minimizing unauthorized access and increased data security. → Enhanced system security by integrating JWT into the authentication process, providing secure and seamless user authentication.

Education

Bachelor of Technology - BTech, Computer Science Engineering, Jaypee University of Information Technology

Senior Secondary (XII), Mayoor School - India

Public links

github: https://github.com/ujjwalpathaak