Node.js problems new hires hit in the first 90 days
Node.js services at startups and product companies grow fast and are often written by many hands. The first month is about learning how a request travels through the app and where errors go.
- Async errors: unhandled promise rejections that crash the process, missing await, and errors swallowed inside callbacks.
- Modules: "Cannot use import statement outside a module", ERR_REQUIRE_ESM, and TypeScript module settings that disagree with package.json type.
- Express: middleware order breaking auth or body parsing, and error handlers that never run.
- NestJS: "Nest can't resolve dependencies" errors, circular module imports and guards or interceptors applied at the wrong level.
- Performance: CPU-heavy work blocking the event loop, slow endpoints, and heap growth that ends in out-of-memory restarts.
- Tooling: nvm Node versions, npm, Yarn or pnpm lockfile conflicts, and ECONNREFUSED errors when a local Docker dependency is not running.
Databases, queues and observability
Most Node services talk to PostgreSQL or MongoDB through Prisma, TypeORM, Sequelize or Mongoose, and to queues such as BullMQ, SQS or Kafka. Job Support helps you read an ORM migration, find a slow query, and understand retry and idempotency rules on a queue consumer.
When something breaks in staging, you can work through logs from Datadog, CloudWatch or Grafana, interpret a heap snapshot or clinic.js output, and turn that into a clear hypothesis to test.
What a Node.js support session looks like
Vikram joins a fintech startup in Gurugram. A webhook handler sometimes returns 500 with no useful log. In a Job Support session he shares the redacted handler and the log pattern, sees that a promise inside forEach is never awaited, rewrites it with for...of and proper error handling, and adds an integration test.
He then uses the desktop app during a Zoom incident review with the US product team, following the discussion in the live transcript and explaining the fix in his own words.
Using Node.js job support responsibly
Use Job Support to understand and improve your own work. You stay the author of your code and the owner of your tickets.
- Follow your employer's policy on sharing source code and logs with external tools.
- Strip API keys, JWTs, webhook secrets and customer data from payloads and logs.
- Never share cloud console, database, npm or GitHub credentials.
Node.js job support pricing and how to start
Job Support costs $5 per hour with taxes included. Each hour includes 200 AI credits plus support, and hours and credits never expire. Pay with Stripe or bank transfer. Refunds are only given if the tool does not work.
The free plan includes 5 live Copilot minutes and 100 AI credits with no card. Install the desktop app on Windows or macOS and bring your next backend ticket.