You will get a production-ready web app built from your idea — design to deployment
Rising Talent
Rising Talent
Project details
You have an idea for a web app. I'll take it from concept to production — responsive UI, database, backend API, auth, integrations, and deployment — all under one roof.
I've spent 5+ years shipping production web apps for US-market companies: fintech platforms, regulated multi-state SaaS, e-commerce storefronts, and a clinical SaaS I built and launched independently. I don't just write code — I own the full delivery: spec, architecture, build, deploy, and post-launch.
Stack: React, Next.js, TypeScript, Node.js, NestJS, PostgreSQL, AWS/Vercel.
What you get:
— Discovery call to align on scope
— Mobile-first, accessible UI
— REST API with auth (HTTPOnly sessions, refresh tokens)
— Database design and clean architecture
— Third-party integrations (Stripe, email, APIs)
— Deployed and live, with source code handoff
— Post-launch support window included
3 tiers: Starter App ($500 / 14 days), Full App ($1,000 / 21 days), Complete Build ($2,000 / 30 days). Message me and we'll find the right fit in minutes.
I've spent 5+ years shipping production web apps for US-market companies: fintech platforms, regulated multi-state SaaS, e-commerce storefronts, and a clinical SaaS I built and launched independently. I don't just write code — I own the full delivery: spec, architecture, build, deploy, and post-launch.
Stack: React, Next.js, TypeScript, Node.js, NestJS, PostgreSQL, AWS/Vercel.
What you get:
— Discovery call to align on scope
— Mobile-first, accessible UI
— REST API with auth (HTTPOnly sessions, refresh tokens)
— Database design and clean architecture
— Third-party integrations (Stripe, email, APIs)
— Deployed and live, with source code handoff
— Post-launch support window included
3 tiers: Starter App ($500 / 14 days), Full App ($1,000 / 21 days), Complete Build ($2,000 / 30 days). Message me and we'll find the right fit in minutes.
Programming Languages
JavaScript, TypeScript, C#Coding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$200
|
Standard
$500
|
Advanced
$900
|
|---|---|---|---|
| Delivery Time | 5 days | 12 days | 20 days |
Number of Revisions | 2 | 3 | 5 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | |||
Source Code |
About Javier Fernando
Full-Stack Engineer | Nest.js Next.js, TypeScript | SaaS in Production
Merida, Mexico - 11:02 pm local time
Most apps look fine in a demo and start cracking the moment real traffic arrives. Slow pages, shaky security, data that breaks mid migration. That is not a maintenance problem, it is an engineering one, and it is what I solve.
The clearest proof is my own product. Lab2Next is a clinical lab platform I designed, built, and still maintain for real users today: patient registration, quality control workflows, digital results, and role based access. Carrying a product all the way to production and keeping it alive taught me to prevent problems instead of patching them.
How I can help you:
✓ Build a complete product from idea to launch, from the architecture to the interface to getting it live.
✓ Build security into the foundation instead of bolting it on later.
✓ Automate the manual work that slows your team down, so repetitive processes run on their own.
✓ Migrate data and modernize old systems cleanly, with no downtime and nothing broken along the way.
I've worked across fintech, regulated lending, enterprise data, e commerce, and healthcare. Different industries, same instinct: find the weak point first, then build something that holds. I own the work from the first conversation to long after launch, and I keep a high bar the whole way.
Based in Mérida, working remote only.
If you're building something that has to ship and keep working, send me a message and tell me what you're building.
Steps for completing your project
After purchasing the project, send requirements so Javier Fernando can start the project.
Delivery time starts when Javier Fernando receives requirements from you.
Javier Fernando works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Spec
We align on requirements, user flows, tech stack, and success criteria before writing a single line of code.
Design & Architecture
UI wireframes, database schema, API contracts, and component architecture — agreed before building.