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English
$
USD
I will build a custom web app or CRM for your business
Alfonso
Level 2
5.0
5.0
About this gig
Do you need a web app to manage your business but don't want to pay thousands for a developer agency?
I build custom web apps using React, Supabase, and Vercel. Clean, fast, and deployed to production. I specialize in internal tools, CRMs, inventory systems, and CRUD apps that replace messy spreadsheets or outdated software.
What you will receive:
- Custom web app built with React and Supabase
- Authentication so only your team can access it
- Database designed and connected from scratch
- Deployed live on Vercel with your domain
- Clean UI your team can use without training
- Full code delivered so you own everything
This service is ideal for small business owners or founders who need an internal tool built fast without paying agency prices.
Message me before ordering and describe what you need to manage or track. I will tell you exactly what I can build for you.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Alfonso
Alfonso
Data Engineer
Level 2
- FromChile
- Member sinceSep 2024
- Avg. response time1 hour
- Last delivery4 days
Languages
English, Spanish
I'm a Junior Data Engineer with hands-on experience in database design, data pipelines, and data-driven web applications.
I deliver ERDs, clean relational schemas, and documentation you can implement and maintain with confidence. I also work with dashboard data modeling, cloud pipeline planning, workflow automation, and building custom internal tools and client-facing apps.
Whether you need a solid database to build on, a pipeline to move your data, or an app to put it in front of your users, I can help you connect the dots.
My Portfolio
FAQ
What technologies do you use to build the app?
I use Next.js for the frontend, Supabase (PostgreSQL) for the backend and auth, and Vercel for hosting. Modern, scalable, and with generous free tiers so you won't need expensive hosting.
Can I make changes to the app after delivery?
Yes. The code is clean, well-structured, and fully yours. You or any developer can modify it. Revisions are included in each package, and I'm available for ongoing support.
I'm not sure which package I need. Can you help?
Of course. Message me with a brief description of your business and what you need the app to do. I'll recommend the best package or create a custom offer for your project.
Reviews
3 reviews for this Gig
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Rating Breakdown
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- Quality of delivery
- Value of delivery
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Most relevant
K ksmvault
Repeat Client
United Kingdom
Working with Alfonso has been delightful as he was able to execute the requirements of my project proposal. Will definitely use his service again in the near future.
$100-$200
Price
2 weeks
Duration
Helpful?J 
joanchiss
Repeat Client
Mexico
Como siempre una vez más haciendo un trabajo impecable, no me canso de trabajar en proyectos con el!
$50-$100
Price
2 days
Duration
Helpful?K ksmvault
Repeat Client
United Kingdom
Amazing result as always and very quick.
$50-$100
Price
4 days
Duration
Helpful?
Reviews
3 reviews for this Gig
| (3) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
K ksmvault
Repeat Client
United Kingdom
Working with Alfonso has been delightful as he was able to execute the requirements of my project proposal. Will definitely use his service again in the near future.
$100-$200
Price
2 weeks
Duration
Helpful?J joanchiss
Repeat Client
Mexico
Como siempre una vez más haciendo un trabajo impecable, no me canso de trabajar en proyectos con el!
$50-$100
Price
2 days
Duration
Helpful?K ksmvault
Repeat Client
United Kingdom
Amazing result as always and very quick.
$50-$100
Price
4 days
Duration
Helpful?
