Monolith vs Modular Monolith vs Microservices: A Decision Framework
Choose between a monolith, modular monolith, and microservices using a practical framework based on team structure, deployment, scale, data, and operational cost.
Aminul Islam Alvi · Dhaka, Bangladesh
Senior Software Engineer building scalable SaaS products, modern web platforms and maintainable systems
I work across TypeScript, PHP, Node.js, Express, Nest, Laravel, WordPress, React, Angular, Vue, Relational database, Containers, Testing, DevOps, and Software Architecture with an emphasis on safe change and long-term maintainability.
Areas of expertise
The parts of product engineering I can own, improve, and explain clearly to a team.
TypeScript and Node.js engineering
Architecture and delivery for maintainable TypeScript applications, Node.js services, APIs, relational data, testing, and production operations.
Software architecture for evolving products
Pragmatic software architecture for SaaS products, platform boundaries, relational data, integrations, reliability, and incremental delivery.
Frontend modernisation without the big-bang rewrite
Incremental frontend modernisation using React, Angular, Vue, Next.js, component systems, accessible UI patterns, and maintainable integration boundaries.
Angular application engineering
Production Angular engineering with TypeScript, RxJS, component architecture, reactive forms, testing, accessibility, performance, and maintainable upgrades.
SaaS delivery and cloud-ready engineering
End-to-end SaaS engineering across product interfaces, APIs, relational data, containers, CI/CD, testing, devops and reliable delivery.
AI engineering and production RAG
Production AI engineering across RAG pipelines, document ingestion, hybrid retrieval, reranking, grounding, evaluation, security, observability, cost, and latency.
Selected engineering outcomes
Lets Learn LMS
A learning management system with course management, authentication, video resources, and progress tracking.
FeatureShark
A SaaS platform for collecting customer feedback, prioritising features, and managing a product feedback workflow.
Wealth Management Platform
A secure WordPress Multisite platform with custom React and Gutenberg components for financial content teams.
Latest technical articles
TDD in Production Software: Where It Helps and Where I Do Not Force It
A practical guide to test-driven development in production software: where TDD improves design and confidence, where it creates friction, and how to use it without dogma.
TypeScript Strict Mode: The Settings I Enable for Production Projects
A practical TypeScript strict-mode configuration for production projects, with the bugs each compiler setting catches, trade-offs, and a safe adoption plan.
Engineering notes and experiments
I also publish hands-on learning notes about Go, Rust, Distributed systems, Machine learning. These are presented as active study and experimentation, not senior-level commercial claims.