Vishal Tyagi

Working on product analytics (Amplitude/ProductAnalytics), in-app single-session hybrid telephony (cloud + SIM calling), admin web platform migration, and CRM integrations (Facebook/Meta, WABA, HubSpot, Zoho, Salesforce).

• Product analytics instrumentation: Built a ProductAnalytics facade over Amplitude with structured event taxonomy, user/company traits, time-windowed deduplication, and CRM activity tracking across web and mobile.↳ Verified Metric: 153+ analytics commits
• In-app single-session hybrid telephony: Built hybrid calling mode allowing users to switch between Cloud Telephony (virtual numbers) and SIM calling within a single session without logging out or re-initializing the app.↳ Verified Metric: Single-session switching
• Admin web platform migration: Contributed to migrating admin web surface to Flutter Web with reusable components for bulk upload/deletion, integration dialogs, sheet validation, and dirty-check patterns.↳ Verified Metric: 150+ admin-web commits

Contributed to redevelopment of an inventory management system using Flutter, Express, and MongoDB, replacing a legacy Python/Laravel stack. Built image-recognition features for product categorization and OPC UA/Node-RED data streaming for industrial monitoring.

• Legacy stack migration: Contributed to migrating from Python/Laravel to Flutter/Express/MongoDB, enabling cross-platform mobile and web inventory operations with flexible schema.↳ Verified Metric: Python/Laravel → Flutter/Express/MongoDB
• Industrial IoT integration: Integrated OPC UA client and Node-RED for real-time PLC data streaming from Siemens and Delta controllers for industrial monitoring.

Built a Python OMR automation script that processed 90,000+ sheets; supported client onboarding and DevOps practices (Jenkins, Terraform).

• OMR automation at scale: Built a Python automation pipeline for OMR sheet reading with staged preprocessing, detection, and extraction, processing over 90,000 sheets for large-scale assessment workflows.↳ Verified Metric: 90,000+ sheets processed

Built a blockchain-based NGO donation/payout transparency platform and an OCR handwritten answer-sheet checker; managed client hosting and DNS.

• On-chain donation transparency: Built a Solidity smart contract platform on Ethereum for transparent NGO donation and payout tracking with on-chain traceability.↳ Verified Metric: On-chain donation/payout traceability
• OCR answer-sheet checker: Built an OCR-based handwritten answer-sheet checking tool alongside the blockchain platform.

Built and maintained college portals (feedback, RISE, PIET Quest exam integrity portal, KBE quiz, ticketing/payments, bus tracking/attendance).

• Exam integrity portal: Built PIET Quest exam portal with cheating-detection-based question reordering, randomized question sets, and automation for report downloads and question uploads.↳ Verified Metric: Randomized sets + dynamic reordering
• Multiple college portal systems: Built and maintained feedback, RISE, KBE quiz, ticketing/payments, and bus tracking/attendance portals for college operations.