I build secure, high-scale modern web platforms that stand up to real usage.

Needed a fully embedded, white-label Kanban SaaS that ran inside GoHighLevel iframes without CORS failures, JWT session collisions, or iframe sandbox security policy violations.

Engineered a Next.js 14 App Router frontend with Zustand optimistic UI rendered inside GHL iframe embeds. Built a Laravel 11 API backend with RabbitMQ worker queues for real-time card movement broadcasting via ActionCable WebSocket channels. Implemented Redlock distributed locking on concurrent card drag operations.

Zero session-collision failures across 500+ concurrent GHL accounts. Sub-120ms board render on cold load. Full white-label, multi-tenant SaaS with automated RabbitMQ retries for zero task loss.

University of Pennsylvania's Linguistic Data Consortium needed PCI-DSS compliant, ACID-guaranteed bulk licensing e-commerce without storing card data on their servers.

Architected a CyberSource Secure Acceptance hosted checkout flow (SOP) so all card data flows directly to CyberSource servers. Implemented HMAC-SHA256 order signing, idempotent webhook settlement, automated ActionMailer license dispatch, and row-level locking on concurrent license inventory deduction via SELECT ... FOR UPDATE.

PCI-DSS Level 1 compliant checkout with zero card data exposure. 100% webhook idempotency across 5,000+ annual transactions. Automated PDF invoice & license key delivery within 2 seconds of payment settlement.

Needed a multi-tenant affiliate portal with separate dashboards per brand, real-time commission tracking, and Stripe Connect automated payouts across hundreds of affiliate accounts simultaneously.

Built a Laravel 11 multi-tenant backend with schema-isolated PostgreSQL databases per portal instance. Implemented a React 18 dashboard with real-time click/conversion telemetry streaming. Integrated Stripe Connect Express with split-payment routing and automated commission disbursement workflows.

Processing affiliate commissions across 300+ active affiliate accounts. Sub-50ms dashboard data load via Redis query caching. Zero double-payment incidents through idempotent Stripe event processing.

Attorneys and court staff needed sub-second full-text search across 100,000+ case records with multi-attribute filtering (case type, judge, year, district) without full table scans.

Built an Elasticsearch 8.x inverted index cluster with custom edge n-gram tokenizers for partial-word autocomplete. Designed a Laravel API gateway with compound query DSL for simultaneous multi-field filtering. React 18 search UI with debounced instant-search.

Sub-45ms full-text search across 100K+ judicial records. 99.97% search uptime. Elasticsearch cluster handles 500+ concurrent search queries without degradation.

Required a horizontally scalable multi-tenant e-commerce platform that could onboard new merchants without infrastructure provisioning delays or tenant data leakage risks.

Designed a Laravel multi-tenant architecture with row-level tenant isolation (no shared schema risks). Deployed on AWS EKS (Kubernetes) with Horizontal Pod Autoscalers and RDS Aurora read replicas for peak-traffic scaling. GitHub Actions CI/CD with zero-downtime rolling deployments.

Supports 200+ active merchant storefronts. Auto-scales from 2 to 20 pods during peak traffic with zero manual intervention. 99.95% uptime SLA maintained.

Social platform at 1M+ users hitting Redis cache invalidation storms, API response degradation under concurrent write bursts, and push notification delivery failures at scale.

Redesigned the caching layer with tag-based Redis invalidation groups to prevent cache stampedes. Implemented Node.js cluster workers with PM2 for multi-core API utilization. Migrated push notification delivery to SNS topic fan-out with SQS dead-letter queues for guaranteed delivery.

Eliminated cache stampede incidents entirely. API P95 latency reduced from 1,200ms to 180ms under 5K concurrent users. Push notification delivery rate improved from 87% to 99.4%.