Ottokar - Node.js Developer AI Skill

Name: Ottokar - Node.js Developer AI Skill
Brand: KissMySkills
Price: 29.0 USD
Availability: InStock

Ottokar - TypeScript/Node.js Backend Engineer Claude skill by KissMySkills, hardcover volume cover

$29.00

$29.00 $43.99

Ottokar - Node.js Developer AI Skill

$29.00 this skill vs $43.99 hiring a Node.js backend engineer

Complete skill package instant downloadottokar-typescript-nodejs-backend-engineer.skill

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Choose how to get it

Buy once $29 This one skill as a file. Yours forever, works in any AI chat. All-Access whole library $8.25/mo billed yearly All 1,000+ skills in the marketplace. Your AI picks the right one and loads it by itself. Claude, ChatGPT, Claude Code, Cursor · or $19 month to month

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⚡ Instant download ∞ Keep forever ✎ Written by us

Add it once. Your AI works like a specialist.

Add it to Claude, ChatGPT or Gemini - your AI works as a specialist in this field.

Instant download · 30-day money-back guarantee. Pay once, keep forever - no subscription. Written and tested by us, never scraped from GitHub. Refund policy

Ask Ottokar something hard.

📎 ottokar-typescript-node-js-backend-engineer-ai-skill.md LOADED ✓

Express API: p99 jumps to 4s under load but CPU sits at 35% and the Postgres pool looks healthy. Team blames the DB anyway. Truth?

CLAUDE · AS OTTOKAR, NODE.JS DEVELOPER 35% CPU with 4s p99 and a healthy pool means the event loop is blocked - measure it directly with monitorEventLoopDelay; if lag spikes track p99, case closed. Usual suspects in an Express app: JSON.stringify on multi-MB responses, synchronous crypto - bcrypt at cost 12 on the main thread eats 250ms per hash - zlib sync calls, or a logger serializing huge objects. Clinic.js flame or 0x names the exact function in an afternoon. Offload hashing to worker threads, stream the big payloads, and p99 usually collapses under 500ms. Run the loop-delay histogram at peak and paste it - I'll read it with you.

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You don't read it. Your AI does.

Add the skill file to Claude, ChatGPT or Gemini once. From then on it works as a specialist in this field and answers as Ottokar from the very next message.

Buy once and the file is yours to keep forever. Or subscribe to All-Access and let the KissMySkills connector load it, and every other skill, into your chat on request.

// what's inside

What's inside this skill

Event loop blocking analysis naming the offending calls
Request and response types defined as code
N+1 query diagnosis made at the ORM layer
Performance fix list ordered by real impact

Node and TypeScript developers whose API slows down long before Postgres does.

A senior TypeScript/Node.js backend engineer bills $110+/hr for API architecture and event-loop performance diagnosis, the complete skill is yours forever.

// what's inside

What you're actually buying

Find out what's actually blocking the event loop before blaming the database.

Ottokar is a Senior TypeScript/Node.js Backend & API Engineer skill built around Node's single-threaded, event-driven runtime as the central design fact. He covers NestJS-versus-Express architecture, end-to-end type safety with tRPC and zod, REST and GraphQL API design, Prisma and TypeORM database access, JWT-versus-session authentication, Jest/Supertest testing, worker threads and clustering, and containerized or serverless deployment.

Who it's for

TypeScript and Node.js backend engineers and API teams.

Key capabilities

Profiles for a synchronous or CPU-bound call sitting in an async request path before assuming a slow API is a database or infrastructure problem.
Picks NestJS or Express by team size and how much enforced structure the team actually wants, not by trend.
Defines request/response types as code first (tRPC, zod, class-validator) so a contract violation fails at compile or validation time, not in production.
Catches N+1 query patterns at the ORM layer with eager loading, includes, or a dataloader before shipping a list-returning endpoint.
States whether authentication is stateless (JWT) or stateful (sessions) and why that fits the service's scaling and revocation needs.

How to use it

Paste Ottokar's SKILL.md into your Claude Project Instructions (or any AI system prompt), then describe your typescript/node.js backend engineer problem. Works with Claude, ChatGPT, and any AI chat. Under 2 minutes to install.

// how to install Under 2 minutes

Four steps. Any AI chat.

01
Download the file
After checkout, the download link lands in your inbox. Save the file anywhere on your device.
02
Open your AI chat
Claude, ChatGPT, Gemini, Grok, or Copilot - whichever one you already use.
03
Paste the file contents
Drop it into the system prompt, Project instructions, or custom instructions field.
04
Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.

No technical knowledge required. No subscription. Pay once, keep forever.

// compatible with

Works with every major AI chat.

Drop the file into your AI's system prompt, Project instructions, or custom instructions. No setup. No code. No vendor lock-in.

// faq

Questions about this product

What AI tools does this work with?+

Any AI chat that accepts custom instructions - Claude, ChatGPT, Gemini, and others. Paste the SKILL.md content into your project instructions or system prompt.

How do I install it?+

Download the file, paste its full contents into your AI's custom instructions, project instructions, or system prompt field. Takes under 2 minutes.

Is this a course or a tool?+

It's a tool - a structured expert persona and workflow, not a video course. You use it immediately by pasting it into your AI chat.

Why does Ottokar check the event loop before blaming the database for a slow API?+

Because a single synchronous or CPU-bound call sitting in an otherwise async request path can stall every other queued request, and that failure mode is invisible until real load arrives. Ottokar profiles for it before assuming the bottleneck is the database or infrastructure.

Do I have to read it myself?+

No. The file is written for your AI to read, not for you. Upload it or paste it in once and the AI takes on the role. After that you just ask it questions the way you normally would. You're welcome to open it and read it, but nothing here depends on you doing that.

Is this a physical book?+

No, it's digital. You download it the moment the order goes through and it's yours permanently. The cover is styled like a book because each edition is written and edited as one self-contained piece of work. The reading part is your AI's job, not yours.