Modular Monolith in Node.js: Enforcing Module Public APIs
Build a modular monolith in Node.js with TypeScript: small index.ts public APIs, tooling-enforced boundaries, data ownership, events, and a composition root.
13 min read
Category
Monoliths & Modular Monoliths
When one deployable is the right answer, how to structure it, and how to migrate in either direction.
How to Split a Monolith Database Gradually Without Breaking Joins
Learn how to split a monolith database by mapping joins first, assigning table ownership, and migrating one reversible stage at a time with safe rollbacks.
15 min read
Enforce Module Boundaries in a Modular Monolith with ArchUnit and ESLint
Define modules, write allow-list dependency rules, and fail CI on violations using ArchUnit tests on the JVM and boundary lint rules in TypeScript.
13 min read
How to Merge Microservices into a Monolith: A Migration Playbook
A step-by-step playbook to merge microservices into a modular monolith: when to do it, how to consolidate code and data safely, and what it costs.
13 min read
Spring Modulith Tutorial: Enforcing Module Boundaries in Java
Learn how Spring Modulith infers modules, fails builds on boundary violations, and decouples modules with transactional application events in a Java monolith.
13 min read
Strangler Fig Pattern: Routing Traffic Off a Legacy Monolith
How the strangler fig pattern works at the proxy layer: picking slices, routing rules, data ownership, parity checks, rollback, and finishing the migration.
14 min read
Read Replica Routing in a Monolith Without Stale-Read Bugs
Route reads to Postgres replicas safely: why replication lag varies, read-your-writes strategies, a single routing layer, lag checks, and testing.
13 min read
Background Jobs in a Monolith: In-Process vs a Separate Queue
Compare in-process workers, a database-backed job queue and a message broker for monolith background jobs, with retries, idempotency, scheduling and scaling signals.
20 min read
Multi-Tenant Monolith Database Design: Shared Tables vs Schema per Tenant
Compare shared tables with row-level security against schema per tenant for a multi-tenant monolith: isolation, migrations, performance, lifecycle, and cost.
15 min read
How to Extract a Service from a Monolith: Picking the First Seam
Learn how to extract your first service from a monolith by choosing a clean seam, untangling data, cutting over safely, and budgeting for platform work.
13 min read
Monolith Caching Strategies: In-Process vs Shared Cache
Compare in-process and shared caches in a monolith, covering hit rates under scaling, invalidation, cache stampede fixes, two-tier design and what to measure.
13 min read
Bounded Contexts in a Modular Monolith: Enforce Them in Code
Learn how to discover bounded contexts, enforce module boundaries in code, schema and CI, map context relationships, and decide when to extract a service.
13 min read