Manojkumar
I’m a senior full-stack engineer with 14+ years building and operating PHP/Laravel backends, REST APIs, and integrations that stand up reliably in production.
About
I’m a senior full-stack engineer with 14+ years building and operating PHP/Laravel backends, REST APIs, and integrations that stand up reliably in production. I’ve shipped Shopify apps and SaaS products that depend on queued webhook processing, robust retrieval and rate-limiting, and careful data integrity across async workflows.
I’m especially focused on production reliability: idempotent webhook delivery, retries with exponential backoff, dead-letter handling, and per-tenant fairness so one account can’t block others. I’m comfortable working end-to-end with React + Inertia tools, and I keep third-party integrations working even when endpoints are undocumented or change—by reverse-engineering request/auth/rate-limit behaviors and validating everything against real logs, metrics, and tests before release.
- 15 years' experience
- Joined September 2026
Industry experience
- Software & Internet
- Retail
- Financial Services
- Education
- Healthcare
Work experience
Owned production reliability for multiple public Shopify apps (e.g., Sticky Cart, Automatic Discount Rules, Tellos Shoppable Video, Goodszilla, GetGoji, Free Shipping Bar) and the Zanvos SaaS platform, serving 500+ merchants and processing ~3,000 queued jobs/day plus high-volume webhook events (peaks around 200k during sales). Designed Laravel + Redis queue-based webhook ingestion with idempotent handlers keyed on event ID, exponential-backoff retries, per-account rate limiting against upstream budgets (Shopify/Zohos), and dead-letter handling so one merchant burst can’t stall others. Investigated and resolved production incidents using logs/metrics and the actual request/job flow; added regression tests for failures that were too risky to repeat. Reverse-engineered undocumented/ private upstream endpoints (Shopify Admin, GoHighLevel, Zoho) to maintain authentication, posting/data sync, analytics capture, cookie/header replication, request signing, and resiliency to rate limits and
Architected and built backend systems and REST APIs using PHP/Laravel and Node.js, covering database design, deployment, and production support. Delivered AI-powered features and business automation using n8n, GoHighLevel, and Zoho, integrating third-party APIs across client systems. Developed custom Shopify themes/apps and public apps, and built SaaS platforms plus CMS-based web solutions using Webflow, WordPress, BigCommerce, and Kajabi. Led performance optimization and CRO work across 40+ client projects spanning retail, fintech, education, and healthcare.
Architected and built backend systems and REST APIs using PHP/Laravel and Node.js. Designed and implemented database structures, system architecture, deployment, and production support. Delivered AI-powered features and business automation using n8n, GoHighLevel (GHL), and Zoho, integrating third-party APIs across client systems. Developed custom Shopify themes/apps and built SaaS platforms along with work on Webflow, WordPress, BigCommerce, and Kajabi. Led performance optimization and CRO work across 40+ client projects spanning retail, fintech, education, and healthcare.
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