Vercel App Development Services

Your Vercel app builds locally. Production is a different story.

Serverless functions timing out at 10 seconds. Edge runtime errors with no fs or Buffer. Preview pointing at one database, production at another. Builds hitting the 45-minute limit. Connection pools exhausted under load. We diagnose the Vercel-specific cause and fix it before your next deploy.

300+
Apps launched
15 yrs
Experience
98%
Success rate

"AppStuck saved our project! We were stuck for months... got us live in just 3 weeks."

Lars Andersen, Nordic FinTech Solutions

Common Vercel Problems We Fix

Vercel is an excellent deployment platform. These are the Vercel-specific issues that stop projects from shipping — all fixable once you know where to look.

Serverless Function Timeout

Vercel API routes default to a 10-second execution limit. Database queries, third-party API calls, and file processing that exceed it return a 504. We restructure long-running operations as background jobs or edge streaming responses.

Wrong Runtime: Edge vs Serverless

Vercel Edge Functions run in a V8 isolate with no Node.js APIs — no fs, no Buffer, no full crypto. Code that works on serverless breaks silently on edge. We audit your runtime assignments and fix the mismatches.

Preview vs Production Env Mismatch

NEXT_PUBLIC_ variables baked at build time mean preview and production can silently point at different APIs or databases. We audit all environment variable scopes and fix the configuration so production behaves correctly.

Build Timeout on Large Projects

Vercel's default build limit is 45 minutes. Large Next.js monorepos with unoptimised ISR pages or heavy static generation hit it regularly. We fix the build pipeline so deploys complete reliably.

Core Web Vitals Failing

LCP over 2.5s, high CLS from layout shift, or slow INP — all caused by Vercel-hosted apps sending too much JavaScript or deferring critical resources. We identify and fix the root causes, not just the symptoms.

Database Connection Pooling

Serverless functions open a new database connection on every invocation. Without a pooler like PgBouncer or Supabase Pooler, you exhaust connections under load. We configure connection pooling correctly for the serverless environment.

Recognize any of these? We fix them in 2–5 days.

Book Free Discovery Call

What We Do With Vercel Projects

We assess the codebase, fix what’s blocking you, and take the project to a stable production deployment.

Project Assessment

48-hour audit of your codebase and deploy config: what works, what breaks, and the exact path to a stable production launch.

Bug Fixes & Rescue

Targeted fixes for build errors, deploy failures, and integration issues — without touching what works.

Production Launch

Full environment setup, domain configuration, SSL, monitoring, and a production-grade Vercel deploy.

Feature Completion

Advanced features, custom API routes, third-party integrations, and optimizations your app needs for real users.

How We Work

Three steps. You know the cost before committing to anything.

1

Free Discovery Call

30 minutes. You show us the app and describe what’s blocking you. We tell you honestly what it needs and what it costs. No commitment.

2

Assessment & Fix Plan

Within 48 hours of starting, you get a written plan: what we’ll fix, in what order, and the projected timeline. You approve before any work begins.

3

Fix, Test & Launch

We fix the issues, test in production conditions, and deploy. You get a working app live, a handover doc, and optional post-launch support.

Start With a Free Call

Responds within 1 business day. No commitment.

Pricing

Transparent rate, no surprises. Every project starts with a free assessment so you know exactly what it takes before committing.

$70 /hour

Minimum 5 prepaid hours · Fixed quotes available

  • Free discovery call included
  • Written plan and estimate before work starts
  • Hourly billing or fixed project quote
  • No surprise charges — you approve scope first
  • Post-launch support available
Get a Free Assessment

Typical engagements: 5–40 hours depending on complexity.

Projects We’ve Rescued

300+ apps launched. 98% success rate across 15 years.

FinTech

Nordic FinTech — Stuck for Months, Live in 3 Weeks

A FinTech team had been stuck on their AI-generated app for months before reaching out. We took over the project, assessed what was blocking them, and had them live within 3 weeks.

"AppStuck saved our project! We were stuck for months... got us live in just 3 weeks."

— Lars Andersen, Nordic FinTech Solutions

Frequently Asked Questions

Everything you need to know before reaching out.

Yes. Build errors on Vercel are usually caused by missing environment variables, incorrect build commands, or code that works locally but fails in the serverless environment. We diagnose and fix the root cause.

$70/hour, 5-hour minimum. Simple fixes: 5–10 hours. Full production launches: 15–40 hours. Written estimate after the free assessment.

Production and preview environments on Vercel have different configurations, environment variables, and edge network behavior. We audit the difference and fix the production-specific issues.

Targeted fixes: 2–5 days. Full launch from a partially-built project: 2–4 weeks. You get a timeline estimate after the free discovery call.

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Your Vercel App Is Close. Let’s Get It Live.

Free discovery call. No commitment. We tell you exactly what it takes to ship — you decide if it makes sense.

Responds in <1 business day. Based in Europe, serving clients worldwide.

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