Distributed multi-tenant onboarding platform using Flowable BPM command-pattern orchestration for hybrid automated / human-approval workflows — cut merchant onboarding effort 90%.

Node.js · React · Flowable BPM · Jest · Mocha

Core multi-tenant backend services for a loyalty & promotions engine — bill processing, points earn/redeem, cohort segmentation, and campaign execution; extended ClickHouse OLAP pipelines and Elasticsearch indices for real-time analytics.

Node.js · TypeScript · Express · PostgreSQL · ClickHouse · Elasticsearch · Redis · Docker · Kubernetes

Multi-source event-streaming ingestion pipeline (Kafka topics, flat files, CDC) with schema-driven transformers and batched ClickHouse writes — processing millions of events/day at sub-second latency.

Apache Kafka · Node.js · ClickHouse · PostgreSQL

Full-stack embedded Shopify commerce app (Remix + Shopify GraphQL Admin API) bidirectionally syncing customer, catalog, and order data into the CRM; OAuth 2.0 / OIDC customer login via Keycloak.

Remix · TypeScript · Prisma · Shopify GraphQL Admin API · Keycloak (OIDC)

Serverless microservices (AWS Lambda + SQS + S3) automating AR template generation and deployment for a no-code AR platform — reduced deployment time 50%; 95% test coverage gated in CI/CD.

Node.js · AWS Lambda · S3 · SQS · GitHub Actions · Jest · Mocha

React 18 drag-and-drop e-bill configurator with runtime schema-driven layout and Zod validation — cut merchant configuration effort 70%; shipped 30+ MUI components to an internal Storybook, boosting team velocity 40%.

React 18 · TypeScript · react-hook-form · Zod · MUI · Storybook · Rollup

Webhook-driven lead-ingestion service capturing, validating, and routing Meta Ads leads in real time; integrated Meta Ads & Google Ads APIs into conversion dashboards for end-to-end marketing attribution.

Node.js · Meta Ads API · Google Ads API