Documenting my journey through Golang, TypeScript, and Distributed Systems.

How I built the driver-matching core of a Grab-style ride-hailing demo — a Turborepo monorepo of NestJS microservices, Redis GEO for nearest-driver search, race-safe assignment with Redis locks, and real-time tracking over WebSocket.

LocalStack Community froze in March 2026. Floci is a free, MIT-licensed AWS local emulator that runs Lambda in real Docker containers. This post wires up a Turborepo with two Hono Lambdas, an SQS trigger, and CloudWatch logs — using nothing but pnpm, the AWS CLI, and 80 lines of bash.

How to wire DataLoader into a NestJS + Apollo + Prisma stack to batch field resolvers, eliminate N+1 queries, and expose a runtime toggle for live demos.

A from-zero walkthrough of building a multi-Lambda serverless backend with API Gateway, SQS, DLQ, and event source mappings — running locally on LocalStack and deployed with a plain AWS SDK script (no Serverless Framework license).

Replace manual TypeScript interfaces with auto-generated types, React Query hooks, and Zod validation schemas from your Go API — using oaswrap/spec and orval.

Deep dive into designing a centralized exchange (CEX) order-to-settlement flow in Go — covering order book internals, wallet state machines, gRPC orchestration, NATS JetStream events, and saga-style compensation.

Build a shell wrapper around git worktree that auto-creates branches, symlinks shared resources like node_modules and .env, and integrates with Claude Code via WorktreeCreate hooks.

Build a production-ready Google OAuth 2.0 login flow using Go (Fiber) on the backend and React (TypeScript) on the frontend with secure JWT access tokens, hashed refresh tokens, and silent token refresh.

Migrate from backend-handled OAuth to Firebase Authentication — supporting Google, GitHub, and email/password in one unified flow. Go (Fiber) backend verifies Firebase ID tokens and issues its own JWT + refresh token pair.

Build durable, fault-tolerant business workflows in Go using Temporal. Covers orchestration vs choreography, workflow signals, timer-based timeouts, saga compensation, and a real checkout flow with HMAC-verified webhooks.

Use LangGraph PostgresSaver to automatically persist agent state across requests, eliminating manual history management with built-in checkpoint tables.

Add persistent conversation memory to LangGraph agents by loading chat history from PostgreSQL before classification, enabling personalized responses across sessions.

Create a production-ready customer support agent using LangGraph for workflow orchestration, conditional routing, structured output with Pydantic, and confidence-based escalation.

Step-by-step fixes that took our Next.js e-commerce site from mediocre Lighthouse scores to near-perfect 98/100/96/100. Real code changes, real results.

Create an interactive terminal assistant using LangChain with Claude, custom tools for math, Wikipedia, time, and crypto prices, plus persistent chat history across turns.

Create a complete Retrieval-Augmented Generation pipeline using PostgreSQL pgvector for semantic search, Ollama for local embeddings, and Claude for answer generation.

How to use the VS Code Git Worktrees extension with .worktree.yml lifecycle hooks to automate tmux sessions for Claude Code parallel development workflows.

Build robust integration tests using testcontainers-go to spin up real PostgreSQL and Redis instances. Covers test isolation, migrations, and cleanup patterns.

Practical patterns for unit testing Go services using mockery-generated mocks, table-driven tests, and testify assertions in a clean architecture codebase.

Real benchmarks on 24.5M rows showing how TimescaleDB continuous aggregates deliver 10x-3,600x speedups for OHLCV candlestick data compared to PostgreSQL with application-side aggregation.

Real benchmarks showing how we reduced CI time from 165s to 15s by replacing Jest, ESLint, webpack, and tsc with modern Rust-based alternatives.