Engineering projects, case studies, and notes from Vishal Tyagi.https://vishalxtyagi.in/https://vishalxtyagi.in/research/event-dedup-strategies/https://vishalxtyagi.in/research/event-dedup-strategies/An open investigation into time-windowed vs. idempotency-key deduplication for client-emitted analytics events, prompted by dedup work on the Runo product analytics layer.Mon, 01 Jun 2026 00:00:00 GMThttps://vishalxtyagi.in/research/hybrid-state-modeling-patterns/https://vishalxtyagi.in/research/hybrid-state-modeling-patterns/An open look at how the gsmNCloud three-state model from the hybrid telephony work generalizes to other 'a user can have A, B, or both' product situations.Mon, 01 Jun 2026 00:00:00 GMThttps://vishalxtyagi.in/codelabs/amplitude-event-taxonomy/https://vishalxtyagi.in/codelabs/amplitude-event-taxonomy/How to name events and properties so analytics stays usable as the product grows, instead of becoming hundreds of one-off strings.Mon, 01 Jun 2026 00:00:00 GMThttps://vishalxtyagi.in/codelabs/docker-local-dev-workflow/https://vishalxtyagi.in/codelabs/docker-local-dev-workflow/A docker-compose setup for local dev that stays fast — bind mounts, layer caching, and the tradeoffs that actually matter day to day.Mon, 01 Jun 2026 00:00:00 GMThttps://vishalxtyagi.in/codelabs/flutter-dev-environment-linux/https://vishalxtyagi.in/codelabs/flutter-dev-environment-linux/A practical setup for Flutter + Dart on Linux — SDK install, editor config, emulator, and the gotchas that waste the first hour.Mon, 01 Jun 2026 00:00:00 GMThttps://vishalxtyagi.in/projects/runo-product-analytics/https://vishalxtyagi.in/projects/runo-product-analytics/Worked on a product analytics layer at Runo — Amplitude provider abstraction, event taxonomy, user/company traits, deduplication, and platform-aware tracking across auth, billing, CRM, and call workflows.Fri, 01 May 2026 00:00:00 GMThttps://vishalxtyagi.in/notes/event-deduplication-window/https://vishalxtyagi.in/notes/event-deduplication-window/A short note on why a fixed time window for analytics event deduplication needs tuning, not just existing.Fri, 01 May 2026 00:00:00 GMThttps://vishalxtyagi.in/blog/turning-scattered-behavior-into-systems/https://vishalxtyagi.in/blog/turning-scattered-behavior-into-systems/A recurring theme in product engineering: ambiguous, duplicated behavior across screens is more dangerous than it looks, and the fix is rarely glamorous.Fri, 01 May 2026 00:00:00 GMThttps://vishalxtyagi.in/projects/runo-hybrid-telephony/https://vishalxtyagi.in/projects/runo-hybrid-telephony/Contributed to hybrid telephony support at Runo — letting users call via cloud or GSM, with call-medium selection, virtual number assignment, and consistent reporting across logs, exports, and analytics.Wed, 01 Apr 2026 00:00:00 GMThttps://vishalxtyagi.in/case-studies/hybrid-telephony-architecture/https://vishalxtyagi.in/case-studies/hybrid-telephony-architecture/A deeper look at how cloud and GSM calling were unified into one hybrid telephony model at Runo, and what broke before the model existed.Wed, 01 Apr 2026 00:00:00 GMThttps://vishalxtyagi.in/notes/sandbox-vs-production-analytics/https://vishalxtyagi.in/notes/sandbox-vs-production-analytics/Why analytics initialization should check environment/host before sending any events, not just before reporting them.Wed, 01 Apr 2026 00:00:00 GMThttps://vishalxtyagi.in/projects/runo-admin-web-migration/https://vishalxtyagi.in/projects/runo-admin-web-migration/Contributed to migrating Runo's admin web surface to Flutter Web, building reusable components for bulk upload/deletion, integration dialogs, and sheet validation.Thu, 01 Jan 2026 00:00:00 GMThttps://vishalxtyagi.in/projects/nmold-inventory-redevelopment/https://vishalxtyagi.in/projects/nmold-inventory-redevelopment/Contributed to redeveloping NMOLD's inventory management system on Flutter, Express, and MongoDB, replacing a legacy Python/Laravel stack, and added image recognition to reduce manual data entry.Thu, 01 May 2025 00:00:00 GMThttps://vishalxtyagi.in/projects/smart-irrigation-iot/https://vishalxtyagi.in/projects/smart-irrigation-iot/Built an IoT-based smart irrigation system using NodeMCU and sensors for temperature, humidity, and soil moisture, with a Flutter app visualizing data and an SVM model forecasting irrigation needs.Thu, 01 Aug 2024 00:00:00 GMThttps://vishalxtyagi.in/projects/flutter-image-hotspot/https://vishalxtyagi.in/projects/flutter-image-hotspot/Published a Flutter package for defining interactive, clickable hotspot areas on images, useful for floor plans, diagrams, and annotated photos.Mon, 01 Jul 2024 00:00:00 GMThttps://vishalxtyagi.in/projects/piet-quest-portal/https://vishalxtyagi.in/projects/piet-quest-portal/Built an exam portal with cheating-detection-based question reordering, randomized question sets, and automation for report downloads and question uploads.Sat, 01 Jun 2024 00:00:00 GMThttps://vishalxtyagi.in/projects/omr-sheet-automation/https://vishalxtyagi.in/projects/omr-sheet-automation/Built a Python automation script for OMR sheet reading that processed over 90,000 sheets, reducing manual checking effort for large-scale assessment workflows.Mon, 01 Apr 2024 00:00:00 GMThttps://vishalxtyagi.in/projects/blockchain-ngo-donations/https://vishalxtyagi.in/projects/blockchain-ngo-donations/Built a blockchain platform for transparent NGO donation and payout tracking, aimed at increasing trust in how charitable funds move.Fri, 01 Mar 2024 00:00:00 GMThttps://vishalxtyagi.in/projects/enthral-price-automation/https://vishalxtyagi.in/projects/enthral-price-automation/Built a supplier scraping and comparison workflow that flags pricing/listing differences against an OpenCart storefront and prepares margin-based updates.Sat, 01 Jul 2023 00:00:00 GMT