Should we build native apps or use React Native or Flutter?

Cross-platform (React Native or Flutter) fits most products: one codebase, near-native performance and faster releases. Native Swift and Kotlin make sense when you need deep hardware access, heavy graphics or platform-specific features from day one. We recommend based on your product, not on what our engineers prefer, and we staff both.

How much does web and mobile app development cost?

A web app with companion iOS and Android apps sharing one backend typically runs $80,000 to $300,000 as a scoped project with a LATAM team, depending on feature depth and integrations. Adding mobile engineers to an existing team costs $5,500 to $8,500 per engineer per month. US agencies usually quote 40 to 60 percent more for comparable scope.

How long does it take?

Ten to twenty-four weeks for a scoped project covering web and both mobile platforms. A single platform is faster. Embedded engineers can start within two weeks of your first call.

Can your engineers work inside our existing codebase and process?

Yes. That is the embedded model. Engineers join your repositories, standups and review process, and report to your tech lead. Many clients mix it: a scoped project for the new mobile app and embedded engineers on the web product.

Who handles App Store and Google Play submissions?

The team does, using developer accounts in your name. That includes review guidelines, privacy declarations, signing, TestFlight and internal testing tracks, and staged rollouts.

How do you handle QA across so many devices and browsers?

Automated tests for the API and the shared logic, plus manual QA on a device matrix agreed with you: the browsers, OS versions and phones your analytics show your users actually have.

Do you also do the design?

Yes, when you need it. A product designer works with the team on flows, components and the design system. If you already have designers, the engineers work from their files and feed back on feasibility.

Web and mobile development

Web and mobile apps from one team, on one backend, released together.

Full-stack and mobile engineers from Latin America build your web app, iOS and Android apps and the API behind them. As a scoped project or as a team embedded in yours, working US hours.

Talk about your app Book a 30-min Call

Free, no commitment. Takes about 30 seconds.

3 days*to first shortlist

Top 5%of applicants join

97%client satisfaction

* For common roles like full-stack. Other roles typically take 7 to 10 days.

A real person replies within 4 business hours

How it starts

1Technical discovery
2Team assembly
3Design system and API contracts first

200+ people placed with teams like

200+

People Allocated

Of applicants make our active bench

97%

Client Satisfaction

3 days^*

Average Time to First Match

Across fintech, edtech, SaaS, and e-commerce engineering teams in the US

* For common roles like full-stack. Other roles typically take 7 to 10 days.

What does a web and mobile development partner do?

A web and mobile development partner designs, builds, tests and releases applications for browsers, iOS and Android, usually sharing one backend and one design system across all of them. Good partners staff a mix of frontend, mobile and backend engineers with QA, ship in short cycles, and leave you with code, store accounts and a pipeline you control.

Why one team

Splitting web and mobile across vendors is how products drift apart.

When one agency builds the web app, a freelancer builds the iOS app and someone else owns the API, features ship at three different speeds and the product feels like three products.

We staff web, mobile and backend from one bench, agree API contracts and a shared design system before feature work starts, and release on a single cadence. The engineers are vetted across five dimensions, including English communication and ownership, so they can talk to your product manager directly. You can buy this as a scoped project with milestone billing or as engineers embedded in your existing team.

Engagement models

Buy it as a project or as a team.

Model	Best for	How you pay	Typical timeline	Team shape
Scoped project	A new app or a rebuild with a clear feature list and a launch date.	Fixed price per milestone.	10 to 24 weeks depending on platforms and integrations.	Tech lead, frontend, mobile and backend engineers, QA, part-time designer.
Embedded engineers	You have a product team and a codebase, and you need React, React Native or backend hands that follow your process.	Monthly per engineer.	First shortlist in days, 2-week trial, then month to month.	Individual engineers who join your standups and report to your lead.
Dedicated product team	A mobile or web product area you want owned end to end with its own roadmap.	Monthly team rate.	6 months and up.	Self-managing squad with tech lead, engineers, QA and product support.

What you get

Consistent products across every screen.

One design system, every platform

Shared components and tokens keep web, iOS and Android consistent, and cut the time it takes to ship the same feature three times.

API contracts before features

Backend and clients agree the contract first, so mobile is never blocked waiting for an endpoint and the web app never breaks when one changes.

Tested on real devices

QA runs on physical iOS and Android devices and on the browsers your users actually have, not only in simulators.

Store releases handled

App Store and Google Play review requirements, signing, versioning and staged rollouts are part of the work, not an afterthought that delays launch.

Performance as a requirement

Core Web Vitals budgets for the web app and startup time, crash rate and battery targets for mobile are set at the start and measured every release.

You own the pipeline

Repositories, CI/CD, store accounts and monitoring live in your name.

Want to know what it would take?

Tell us what you want to build. A senior person replies within 4 business hours with the next steps.

Talk about your app Book a 30-min Call

The process

Discovery to continuous delivery.

01
Technical discovery
We audit the current codebase or the product spec, agree on the stack, and define the delivery plan.
02
Team assembly
Frontend, mobile, and backend engineers matched to the stack you chose, plus QA.
03
Design system and API contracts first
Shared components and API contracts get agreed before feature work, so web and mobile stay consistent and the backend does not block either.
04
Sprint delivery with real devices
Two-week sprints with demos on staging and on physical iOS and Android devices.
05
Release and continuous delivery
App store and web releases, monitoring, and a documented pipeline.

How we use AI

AI in every step.People sign off on all of it.

Every team we place works with AI tools from day one and keeps training on them as new models and practices appear. It makes the work faster. It does not replace the review.

What stays human

Peer review on every pull request
Manual and automated testing
QA before anything ships
Architecture and product decisions

See the training program

Planning

Break down scope, estimate, and spot risks before the sprint starts.

Coding

Scaffold, refactor, and pair with AI inside the editor.

Testing

Generate test cases and edge cases. People decide what passes.

Documentation

Keep docs and PR descriptions current without the Friday scramble.

Research

Compare libraries, read specs, and prototype faster.

Code review

First pass by AI, final call by a person.

Need AI inside your product? The engineers we place build that too.

AI & ML development

Best fit

For products that live on more than one screen.

SaaS companies adding a mobile app

Your web product works and customers want it on their phones.

E-commerce and marketplace teams

Storefronts, seller dashboards and buyer apps that share a catalog, a checkout and a design system.

Enterprises modernizing customer portals

Replacing a legacy portal with a responsive web app and companion mobile apps, with SSO, accessibility and compliance requirements.

Startups shipping web and mobile at once

Products where the first version has to exist on both surfaces, built by a small team that can move between them.

Before you decide

The doubts everyone has before hiring us.

And what we do about each one.

Software projects always run late and over budget.
Scope is written down and signed off before the build starts, and a milestone is only billed once it is delivered and accepted.
Paid on accepted milestones
I'm not technical. How will I know the work is good?
You see working software at every sprint demo.
A demo every sprint
What if I want to switch vendors later?
Repositories, cloud accounts and third-party services are in your name from day one, and the contract transfers all IP to you.
Code and accounts in your name
Our company has strict security requirements.
Every project includes an NDA and IP assignment, signed by each engineer individually.
NDA, SSO and security reviews

FAQ

Questions about web and mobile development

Let us talk about your app

Web, mobile, or both. One team, one plan.

Tell us what you are building and what already exists. You get a team shape, a timeline and a cost range within three business days.

Talk about your app Book a 30-min Call

Free, no commitment.Prefer email? contact@enzrossi.com

What happens next

1
You tell us what you need. It takes about 2 minutes.
2
A real person replies within 4 business hours.
3
A 30-minute call to understand the project and agree on next steps.

Keep reading

Service

Web and mobile apps from one team, on one backend, released together.

What does a web and mobile development partner do?

Splitting web and mobile across vendors is how products drift apart.

Buy it as a project or as a team.