Milind's notes taken from the Backend in Node.js from Scratch Course by Sanket Singh

Production-grade cryptocurrency trading engine simulator with event-driven architecture, atomic balance updates, and thread-safe order matching. Built with Spring Boot 3.3+, Kafka, PostgreSQL, and Docker. Perfect for showcasing backend engineering skills!

A handbook for Backend Engineering

Autonomous infrastructure recovery engine featuring predictive anomaly detection and self-healing capabilities for critical backend systems.

Enterprise-grade Event-Driven Webhook Service built with NestJS. Architected for high-reliability processing of mission-critical data from Stripe, PayPal, and GitHub. Features include HMAC security, idempotency control, BullMQ-based asynchronous processing with DLQ patterns, and distributed tracing with OpenTelemetry.

A lightweight Java 17 HTTP micro-framework with explicit routing, middleware composition, and production-focused runtime controls.

High-Reliability Code Execution Engine - Monorepo with Standalone HTML IDE, Node.js/Fastify Backend on Render, E2E Tests & CI/CD.

A high-performance Zero-Trust security proxy designed for data privacy and compliance. Implements dynamic data masking (DDM), AES-256 encryption, and automated PII detection to secure sensitive data flows in enterprise environments. Engineered for HIPAA/GDPR alignment.

Backend Agent R&D Framework (Engineering Standards & Onboarding). An Agent-driven workflow tailored for backend development, building a sustainable, breakpoint-resumable, self-correcting, and anti-bloat closed loop via an Intent Gateway, Lifecycle State Machine, LLM Wiki, Skills, and Hooks.

Plataforma de gestão "Enterprise-Grade" focada em auditoria forense, segurança granular (RBAC) e integridade de dados. Desenvolvida em Laravel com arquitetura escalável.

This is a case study on implementing StackOverflow main features as an REST API

Universal dependency resolver using SAT solvers - works for software packages, course prerequisites, books, certifications, and any system with logical dependencies

Simulate Distributed Systems, Scalability, and Real-World Architectures for Backend Engineering.

Rental queue engine demo — Django, PostgreSQL, Elasticsearch, Redis. Queue-based tenant selection with eligibility pipeline, webhook events, and search fallback.

Backend & Cloud Engineer focused on architecting scalable systems, AI-driven automation, and hardened DevOps pipelines.

A concurrent web server implemented in C that utilizes a worker-thread pool architecture to handle multiple HTTP client requests simultaneously. This project demonstrates advanced systems programming concepts, including manual socket management, thread-safe synchronization, and atomic file I/O.

A public repository of technical case studies examining the operational challenges faced by technology platforms in Africa as they scale, handle outages, and maintain reliable systems.

Repovive MAANG Interview Preparation Guide

Software Architecture (SOLID) & Design principles, Patterns and Clean Code. Also, the architecture related topics in IT!