Harikrishnan G

Personalized BetterHelp content surfaced from logged emotional tags. Intent-tiered 3-article journeys, gender-scoped configs, state-machine interaction tracking, and per-day frequency capping.

YAML-driven retest upsell with weighted biomarker scoring and abandoned-cart recovery for upload journeys. Shipped as part of a growth initiative projected to drive incremental quarterly revenue.

Inspects controller callback chains at build time to flag endpoints missing authentication before they ship — surfaced and secured a previously-unprotected admin GraphQL controller.

Pushes post-shipment tracking links into Shopify for automated chargeback evidence, plus an HMAC-verified disputes webhook delivering real-time Slack alerts for dispute visibility.

Stripe webhook retries were creating duplicate sensor shipments. Implemented idempotency via event-ID deduplication and a DB unique index, with billing-period guards before shipment creation.

Designed a SQL-as-queue (a RabbitMQ replacement) for rate-limit-aware consumption of image/video generation across 15 model providers with limits ranging from 4 RPM to 150 RPS — covering task prioritization, exponential-backoff retries, and recovery for stuck jobs.

Conversational image/video generation agents built with Google ADK — a natural-language alternative to the platform's detailed configuration controls, lifting usage by 20%.

Refactored the GenAI tools codebase into an extensible provider architecture and integrated multiple image/video models across 4 request types.

Built backend APIs to generate and publish student assignment reports, integrating an OpenAI Assistant for automated generation and context management.

Re-architected the backend for multi-tenancy using School ID as the tenant key, leveraging async local storage for request-scoped context and strict data isolation.

Removed the default JPA findAll count query and fetch one extra record to detect the next page — eliminating a full-table count on every paginated request.

Refactored the notification service auth module with an interceptor and custom validators to handle all authentication request types through a single path.

Migrated order-report generation off BigQuery to self-hosted MongoDB, re-architecting the data layer in a Go + Gin backend while holding the required scalability and performance.

Order-notification events were firing on a JPA @PostUpdate callback — before the transaction committed — so a rollback could emit an orphaned event. Re-published them through a single async Spring @TransactionalEventListener that fires only in the after-commit phase, so an order is notified exactly when its shipment reaches a terminal state and the change is durably persisted.

Built segment-based discounts, pickup-point discounts, platform fees, shipment-level delivery charges, and a cash-reconciliation system tracking driver collections through to settlement.