A comprehensive open-source reference for backend engineering HTTP, concurrency, gRPC, distributed systems, observability, and cloud-native deployment. Built from first principles.
Backend Engineering, Low-Level Design, System Design, Networking, Security, SQL, and Distributed Systems explained through visual diagrams.
Milind's notes taken from the Backend in Node.js from Scratch Course by Sanket Singh
Learn backend engineering through real production failure cases.
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 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.
High-Reliability Code Execution Engine - Monorepo with Standalone HTML IDE, Node.js/Fastify Backend on Render, E2E Tests & CI/CD.
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
Experimental Subset Sum solver for large integers using SQLite as an out-of-core storage engine.
Official Portfolio & Engineering Blog of Md Shajib Sikder — Senior Backend Systems Engineer & Architecture Specialist at Weekmotion. Specializing in high-concurrency REST APIs, MySQL query optimization, distributed Redis caching, and scalable Laravel queue architectures.
A lightweight Java 17 HTTP micro-framework with explicit routing, middleware composition, and production-focused runtime controls.
An open-source Agent Skill that teaches AI coding agents evidence-based backend performance review: technology-agnostic, workload-driven, and it invents nothing.
Docs for BootArc. (under development)
System Design in Bengali
Personal README & Verified Systems/Full-Stack Engineering Portfolio
A complete end-to-end System Design learning path covering fundamentals, distributed systems, scalability, real-world case studies, architecture patterns, and production-ready system thinking.
Exploring backend engineering through fundamentals, system design, and hands-on learning.
A Production-grade Rental Management System for handling properties, tenants, leases, rent payments, and maintenance workflows.
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