#Design Patterns

Hoisting wire plumbing out of your Go handlers

Four of the five steps in every unary RPC handler are wire plumbing. Pin the service function signature and they fit in one generic adapter per transport.

Redowan Delowar·May 2·8 min read

Go API Design Patterns

Repositories, transactions, and unit of work in Go

Decoupling business logic from storage in Go, adding transaction support without leaking SQL details, and coordinating atomic writes across multiple repositories using a unit of work.

Redowan Delowar·Mar 21·13 min read

Go Database Design Patterns

Gateway pattern for external service calls

Separate business logic from external service calls using the Gateway pattern. Apply dependency inversion and interface segregation in Go.

Redowan Delowar·Aug 3·5 min read

Go Distributed Systems Design Patterns

Writing a circuit breaker in Go

Build a production-ready circuit breaker in Go from scratch with closed, open, and half-open states to prevent cascading failures.

Redowan Delowar·Oct 6·6 min read

Networking Go Design Patterns

Notes on building event-driven systems

Deep dive into event-driven architecture patterns. Learn publish-subscribe, CQRS, outbox pattern, eventual consistency, and handling microservice coupling.

Redowan Delowar·Sep 21·12 min read

Networking Distributed Systems Design Patterns

Strategy pattern in Go

Replace inheritance with the Strategy pattern in Go using interfaces. Achieve composable, testable code without class hierarchies.

Redowan Delowar·Feb 17·5 min read

Go TIL Design Patterns

Configuring options in Go

Compare three Go option patterns: exposed structs, option constructors, and functional options. Learn when to use each for clean APIs.

Redowan Delowar·Sep 5·5 min read

Go API Design Patterns

Escaping the template pattern hellscape in Python

Replace inheritance-based template pattern with composition and Protocol types to create cleaner, testable Python code without namespace pollution.

Redowan Delowar·Jul 1·15 min read

Python Design Patterns

Caching connection objects in Python

Learn efficient patterns for caching database connection objects in Python without import-time side effects or lru_cache complexity.

Redowan Delowar·Mar 16·2 min read

Python TIL Design Patterns

Implementing proxy pattern in Python

Learn the proxy design pattern in Python to add access control, caching, and validation layers without modifying core functionality.

Redowan Delowar·Jun 16·12 min read

Python Design Patterns