Vercel Serverless Function Timeout
Your Vercel serverless functions timeout before completing (504 Gateway Timeout), cutting off long-running operations like data processing, report generation, or large data fetches.
Timeouts occur when functions exceed Vercel's limits (10 seconds for Hobby, 60 seconds for Pro), or when operations are inherently slow.
Error Messages You Might See
Common Causes
- Long-running operations not fitting within timeout limits
- External API calls not timing out, blocking function execution
- Large data processing, image manipulation, or file generation taking too long
- Database queries slow due to missing indexes or N+1 queries
- Not using Vercel's async job queue or background jobs for long tasks
How to Fix It
Upgrade plan: Hobby plan has 10s limit, Pro has 60s. Check plan limits in Vercel docs.
Add timeouts: Set timeout on external calls: const res = await fetch(url, { signal: AbortSignal.timeout(5000) })
Use background jobs: For tasks > 60s, use Vercel's Cron or external job queue (Bull, Inngest).
Optimize queries: Add database indexes, fix N+1 queries, use caching to speed up slow operations.
Real developers can help you.
ISHANTDEEP SINGH
Senior Software Engineer with 7+ years of experience in React, JavaScript, TypeScript, Next.js, and Node.js. I’ve also worked as a tech lead for startups, owning end-to-end technical execution including architecture, development, scaling, and delivery. I bring a strong mix of hands-on coding, product thinking, and technical leadership, and I’m comfortable building products from scratch as well as improving and scaling existing systems.
Nam Tran
10 years as fullstack developer
legrab
I'll fill this later
David Olverson
Solo dev shipping production apps with AI-assisted development. I specialize in rescuing broken Lovable/Bolt/Cursor builds and taking them to production. 10+ apps shipped including SaaS CRMs, gaming platforms, real estate tools, and Discord bots. Stack: Next.js 16, TypeScript, Tailwind CSS, FastAPI, PostgreSQL, Prisma. I use Claude Code with 50+ custom skills for rapid delivery. Average turnaround: 2-4 weeks from broken prototype to production.
Jared Hasson
Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever
Matt Butler
Software Engineer @ AWS
BurnHavoc
Been around fixing other peoples code for 20 years.
Daniel Vázquez
Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.
Jacek Rozanski
Senior PHP/Symfony developer and DevOps engineer with 20+ years of professional experience, running opcode.pl (web development agency, est. 2004).
Day job: I'm the sole backend developer at merketing company where I own and maintain 11 PHP/Symfony microservices on AWS (ECS Fargate, RDS, S3, CloudFront), handle the full CI/CD pipeline (Bitbucket Pipelines, Docker), and manage monitoring with Sentry and CloudWatch. These services handle high request volumes in production every month.
What I bring to AI-built apps:
- I audit and fix security issues (OWASP methodology), performance bottlenecks, and architectural problems in codebases generated by Cursor, Claude Code, Lovable, Bolt, and v0
- I refactor AI-generated prototypes into production-grade applications with proper error handling, testing, and clean architecture (SOLID, DDD, hexagonal architecture)
- I set up the infrastructure AI tools don't touch: AWS hosting, CI/CD pipelines, automated deployments, database optimization, monitoring, and alerting
- I integrate external services: payment providers, email systems, partner APIs, SSO/auth
Tech stack: PHP 8.x, Symfony, React, Next.js, PostgreSQL, MySQL, Docker, AWS (ECS, RDS, S3, SQS/SNS, CloudFront), Terraform, Supabase. I also use AI tools daily (Claude Code, Cursor) in my own workflow, so I understand both the strengths and the gaps in AI-generated code.
Based in Poland (CET timezone). Available for async work and calls during EU/US business hours.
Matthew Jordan
I've been working at a large software company named Kainos for 2 years, and mainly specialise in Platform Engineering. I regularly enjoy working on software products outside of work, and I'm a huge fan of game development using Unity. I personally enjoy Python & C# in my spare time, but I also specialise in multiple different platform-related technologies from my day job.
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
Can I increase the timeout limit?
Hobby: max 10s. Pro: max 60s. To exceed, use background jobs or external processing (e.g., Firebase Cloud Functions).
What should I do for long-running tasks?
Use Vercel Cron for scheduled jobs, or queue library like Bull/Inngest for async tasks that run outside request context.
How do I debug timeout issues?
Add console.log timestamps to find slow sections. Use Vercel Analytics to see function duration. Optimize the slowest part.