Journal
Tested guides by Waseem Anjum on AI automation, AI agents, MCP servers, NestJS, Next.js, TypeScript and self-hosting, with real code and measured results.
Featured
I loaded the same 200,000 order documents into MongoDB 9.0 and PostgreSQL 18 JSONB and measured inserts, indexed lookups (GIN vs B-tree), containment filters, nested updates, aggregations and disk size.
Backend & APIs
I benchmarked a hand-written SKIP LOCKED queue, pg-boss 12 and BullMQ 6 on both Redis and PostgreSQL: enqueue speed, throughput, pickup latency, crash recovery, transactional enqueue and storage per job.
Next.js & React
A tested Sign-In with Ethereum flow for Next.js 16 with viem and iron-session: nonce, wallet signature and session, plus the cookie-nonce replay bug and the 1-second default verify I found while attacking it.
Backend & APIs
I scored built-in tsvector, pg_search, pg_textsearch, Elasticsearch 9.5 and Meilisearch 1.55 on three BEIR datasets: ranking quality (nDCG@10), latency, index size, typos and how fast new rows become searchable.
AI Engineering
Build a ComfyUI custom node with its own JavaScript UI: INPUT_TYPES and the V3 schema, WEB_DIRECTORY, passing UI picks into node outputs, routes, saving state and publishing to the Comfy Registry. Tested on ComfyUI 0.42.1.
Backend & APIs
A regex on the hostname is not SSRF protection. I ran 16 bypass payloads against three checks on Node.js 20 and show the approach that holds up: new URL(), net.BlockList, re-checking every redirect hop and validating the DNS answer at connect time.
AI Engineering
Tested setup for adding a remote MCP server to Cursor, Claude Code, VS Code and Claude Desktop, using a real public endpoint. Copy-paste configs, curl and Inspector checks, mcp-remote, and what tools/list costs in latency and tokens.
Backend & APIs
How to stream live job progress from NestJS with @Sse and RxJS, with the patterns from my Snagbox API: ReplaySubject per job, your own event ids, comment heartbeats, and why one stream per item stalls Chrome. Every behaviour tested on NestJS 12.1.3.
AI Engineering
How to move LLM calls out of request handlers and into a BullMQ queue: idempotent jobs, Retry-After aware backoff with jitter, worker rate limits, schema-validated model output and a dead-letter queue. Tested TypeScript code.
Backend & APIs
A walkthrough of the security layer in my NestJS 11 + Prisma 7 starter: Helmet headers, a CORS allow-list, three-window rate limiting, opt-in CSRF, header-free Pino logs and a Prisma error filter, with the real code and the gaps still to close.
