Hassan RazaSenior Backend & DevOps Engineer

Problem

Enterprise platforms needed reliable backends for complex business workflows, distributed services, analytics, and production operations.

Solution

Contributed to multi-year development and architecture of confidential enterprise-grade platforms spanning distributed services, analytics, and production infrastructure.

Engineering

Designed and implemented scalable backend services, asynchronous processing pipelines, caching layers, database and analytics architectures, API integrations, and containerized deployments — working across backend engineering, DevOps, CI/CD, infrastructure, and performance optimization.

Impact

Services designed for reliability, horizontal scalability, fault isolation, observability, and high-volume concurrent workloads.

• Node.js
• MongoDB
• PostgreSQL
• ClickHouse
• Kafka
• RabbitMQ
• Redis
• BullMQ
• Docker
• AWS
• OCI

PR #7562

Problem

The Nango unified API platform needed an end-to-end OAuth2 provider for AdRoll authorization and API access.

Solution

Authored an AdRoll OAuth2 integration for Nango, covering authorization, token exchange, and provider catalog setup.

Engineering

Implemented OAuth2 authorization and token exchange flows, proxy API routing, provider documentation, and catalog configurations.

Impact

Verified token refresh lifecycles and endpoint execution through automated unit and provider integration test suites.

• TypeScript
• Node.js
• OAuth2
• REST API
• Git

Problem

Vehicle maintenance histories needed tamper-evident logging and auditing indexed by unique VIN numbers.

Solution

Engineered a secure backend platform for logging and auditing vehicle maintenance records keyed by VIN.

Engineering

Implemented cryptographic hash chaining across maintenance log entries, role-based access control (RBAC), audit logging, and Redis-cached API endpoints for low-latency record retrieval.

Impact

Protects data integrity, detects retroactive modifications, and supports controlled low-latency access to audit records.

• Node.js
• Express.js
• PostgreSQL
• Prisma
• Redis
• Docker
• Nginx

Problem

A peer-to-peer marketplace needed scalable backends for location-based listing, search, and trade negotiations under concurrent load.

Solution

Architected a scalable P2P marketplace backend supporting listing, search, and negotiation workflows.

Engineering

Integrated Elasticsearch for full-text search and Redis caching for low-latency queries across large listing datasets; engineered BullMQ workers for real-time notifications, image processing, and expired-offer cleanup.

Impact

Supports low-latency search and background processing for high-concurrency marketplace operations.

• Node.js
• Fastify
• MongoDB
• Elasticsearch
• Redis
• BullMQ
• Docker

Problem

Real-time audio/video ingestion needed an event-driven path for processing frame assets and exporting rendered reports.

Solution

Designed an event-driven media processing system for ingesting live streams, processing frames, and exporting reports.

Engineering

Used Apache Kafka to decouple high-volume media ingestion and orchestrated background conversion workers through Dockerized runtimes, with LiveKit, WebSockets, and AWS S3 in the pipeline.

Impact

Decouples high-volume media ingestion from processing so conversion work can scale independently.

• Node.js
• LiveKit
• WebSockets
• Apache Kafka
• Docker
• AWS S3