Common Issues
deployment
Environment Variables Not Working in Production
Your app works perfectly on your local machine or in the AI tool's preview, but in production it fails. The cause is almost always missing or misconfigured environment variables — API keys, database URLs, and secrets that the app needs to function.
Common Causes
- Environment variables not set in the hosting platform (Vercel, Netlify, Railway, Render)
- Variable names are different between .env file and hosting platform
- The .env file was committed to git with wrong values for production
- Environment variables not available at build time (some frameworks require this)
- The app reads from process.env but the hosting platform uses a different mechanism
How to Fix It
- List all variables in your .env file and verify each one is set in your hosting platform
- Check that variable names match exactly (they're case-sensitive)
- Some frameworks require env vars prefixed with NEXT_PUBLIC_ or VITE_ to be available in the browser
- After adding env vars, redeploy — most platforms require a redeploy for changes to take effect
- Check deployment logs for messages about missing configuration
Real developers can help you.
hanson1014
Full-stack developer experienced in fixing and deploying AI-generated apps from Lovable, Bolt.new, Cursor, and Replit. I specialize in debugging Supabase integration issues (auth flows, RLS policies, database connections), fixing broken deployments, resolving routing/blank screen problems, and cleaning up messy React/Vite codebases. I also build production apps with the Claude API and have shipped a Mac desktop dev tool (Nexterm from scratch. Based in Hong Kong, fast turnaround.
Tejas Chokhawala
Full-stack engineer with 5 years experience building production web apps using React, Next.js and TypeScript.
Focused on performance, clean architecture and shipping fast.
Experienced with Supabase/Postgres backends, Stripe billing, and building AI-assisted developer tools.
legrab
I'll fill this later
Mehdi Ben Haddou
- Founder of Chessigma (1M+ users) & many small projects
- ex Founding Engineer @Uplane (YC F25)
- ex Software Engineer @Amazon and @Booking.com
Jaime Orts-Caroff
I'm a Senior Android developer, open to work in various fields
BurnHavoc
Been around fixing other peoples code for 20 years.
Omar Faruk
As a Product Engineer at Klasio, I contributed to end-to-end product development, focusing on scalability, performance, and user experience.
My work spanned building and refining core features, developing dynamic website templates, integrating secure and reliable payment gateways, and optimizing the overall system architecture.
I played a key role in creating a scalable and maintainable platform to support educators and learners globally.
I'm enthusiastic about embracing new challenges and making meaningful contributions.
Caio Rodrigues
I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures.
I have strong experience working with **dynamic forms, state management (Redux / React Hook Form), and complex data-driven interfaces**. I enjoy solving real-world problems by turning ideas into reliable software that companies can actually use in their daily operations.
Beyond coding, I care about **software quality and architecture**, following best practices for componentization, code organization, and performance optimization.
I'm also comfortable working across the stack when needed, integrating APIs, handling business logic, and helping transform prototypes into production-ready systems.
My goal is always to deliver solutions that are **simple, efficient, and genuinely useful for the people using them.**
Meïr Ankri
Full-stack developer specializing in React / Next.js / Node.js with 6+ years of experience. I've worked across various sectors including automotive (Reezocar/Société Générale), healthcare (Medical Link SaaS), and e-commerce (Glasman). I build web apps end-to-end, from architecture to production, with a focus on scalability, performance, and code quality. I also mentor junior developers and contribute to technical decisions and code reviews.
AUXLE
I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies.
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Get HelpFrequently Asked Questions
The app works on my computer but not after deploy. Is it env vars?
Very likely. This is the #1 cause of 'works locally, breaks in production'. Check that all environment variables from your .env file are set in your hosting platform.
I set the env vars but it still doesn't work. What else could it be?
Make sure you redeployed after adding them. Also check that the variable names match exactly (case-sensitive) and that any framework-required prefixes are included.