React Development Company
React Code the Next Developer Can Read
As a React development company of one, I build and rescue React front ends myself, from a first scoping call to a handed-over repository. You own the code, the hosting and every login, and each release comes with a plain note on what changed.
★★★★★ 5-star rated on Google · 14 years · 300+ Las Vegas businesses

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React App
Most React apps get slower with every sprint
A product lead usually reaches me after the same sequence. A React app shipped. It felt quick. Then every release added a library, a new state store, another page of components copied from the last one, and now a button takes a second to respond and nobody can say why. The original developers have moved on, and the person who answers your email has never opened the repository.
The complaint I hear most is not that React was the wrong choice. It is that the spend cannot be checked. You paid for sprints, you received demos, and when the app slows down there is no way to see which release caused it or what the team was working on instead of fixing it.
I build React so that fear has nothing to attach to. You own the repository from the first commit, the hosting is in your name, and I write down what each release does.

What Is React JS in Simple Words
What React is, and where React fits
React is a JavaScript library for building the parts of a website or app that people click on and read. You describe a screen as a set of small pieces, such as a header, a search box or a booking form, and React keeps the screen in step with your data as it changes. It was created at Facebook, now Meta, and it is open source under the MIT license.
Is React software free? The library is, and so is most of the tooling around it. What costs money is the work of structuring an app so it stays fast and readable, plus hosting, testing and the services it connects to.
- A marketing site with a few interactive pieces rarely needs React at all
- A booking portal, client dashboard or member area usually does
- An internal tool with many forms and tables fits React well
- A site that must rank on search needs React rendered on the server, not in the browser alone

Is React a Framework or Library
React itself is a library. It handles the screen and leaves routing, data loading and the build to other tools, which is why two React projects can look nothing alike. React JS is used for the front end, the part running in the browser, and it can also run on a server to produce the first page of HTML. It is not a backend and does not store your data.
Most of my React work sits inside a framework such as Next.js, which supplies routing, server rendering and a sensible build. I cover that on my Next.js page. When a project needs a backend as well, I pair React with a Node service or a Python API, and I say in the scope which one and why.

The choices that sit around React
Reactjs development for new products
A new front end with a component library, typed data contracts and a deploy pipeline you can run without me.
Read more →React rescue and audit
I read the existing code, measure it and send a written list of what is slow, risky or duplicated before anything is changed.
Read more →React with Next.js
Server rendered pages for sites that must be found on Google and still feel like an app.
Read more →React app login and member areas
Sign-in, password reset and role-based pages built on a managed identity service, so passwords are never stored by custom code.
Read more →React for a first version
A narrow first release that real users can try, scoped so it can grow without a rewrite.
Read more →Hand-over and training
A written guide to the repository, a recorded walkthrough and a first change made by your own developer with me watching. Sites that sit around the app are covered on my web design page.
Read more →React Development Portfolio
Work I built, live where you can check it

Website build · Las Vegas
WebVegas: a Las Vegas web design brand and its booking funnel
I designed and built webvegas.io, a Las Vegas web design and SEO brand: the site, a four-step booking form that hands each lead a free design walkthrough, and the brand behind it.
See the live sitePortfolio Examples
More of the work

Website build · Henderson
GIOSTAR: the clinic website, booking and lead tracking
See the live site

Brand mark · Event venue
Desert Inn Oasis: the refined mark and the plan for the new site
Site in build

Brand identity · Pharma
Mili Pharma: the butterfly mark and the lockups
Site in build

Social content system
Quotible: a testimonial-led social series
Content system
React Development Company Reviews
What clients wrote on Google
- ★★★★★
After going back and forth on whether to bring in outside help, we ended up working with Justin for some AI consulting on how to structure our operations. He laid out a clear plan, didn't overcomplicate it, and we've been running smoother since. Good fit for a service business. He knows Las Vegas and he knows this stuff.
Kristen S. · Google
- ★★★★★
Justin joined our team a few months before opening to replace a marketing agency that wasn’t performing. He stepped up fast. Within weeks he launched a fully redesigned website with new brand guidelines, built and delivered our marketing plan and AI strategy, and helped implement our system architecture so we could open on time. Since then, he’s made several critical enhancements to the site that helped us generate revenue in our first month. His engagement was supposed to end at opening, but he became such an integral part of our leadership team that we kept him on to help evolve our marketing and tech strategy as we grow. He’s easy to work with, pushes back when it matters, and moves easily between strategy, delivery, and operations depending on what’s needed. If you’re looking for a deeply experienced, knowledgeable, and dedicated marketing, AI, or technology consultant, I highly recommend Justin Harris AI Consulting.
Devin R. · Google
- ★★★★★
Justin has been a true Gem to have as part of our company. His professionalism, immediate attention to branding and extensive details in marketing has made so much improvement on our business. We are forever grateful to have such and amazing marketing asset and cannot thank you enough Justin!
Desi W. · Google
- ★★★★
Justin Harris was very helpful in resolving some issues we had with our Webflow website.
Kristy F. · Google
- ★★★★★
I had the pleasure of working alongside Justin and consistently saw firsthand the level of dedication and professionalism he brings to his work. He was always the first one in the office, setting the tone with his strong work ethic and commitment to excellence. What stood out most was how deeply he cared about every client. He approached each project with thoughtfulness, expertise, and a genuine drive to deliver meaningful results. He combines sharp technical knowledge with a practical, solutions-oriented mindset, which makes him especially effective in the AI space. Any organization looking for thoughtful, reliable, and highly skilled AI consulting support would be in great hands working with him!
Jenevine Y. · Google
- ★★★★★
Hired him to manage our AI systems and it's been pretty smooth. He knew what needed to be done and got it handled without a lot of back and forth. Good experience for our service business.
BC G. · Google
- ★★★★★
I follow Justin on social media and read about his work and his contributions to the AI industry. He really knows how to use the technology in creating a system that allows you to make your business work more efficiently and effectively.
Ana J. · Google
- ★★★★★
Justin was the person I would go to for advice about AI automation for my workload. He knew the subject well and didn't overcomplicate it. For anyone in Las Vegas running a service business and wondering if AI systems are worth looking into, talking to him first is a great move!
Yaneliz M. · Google
- ★★★★★
Working with Justin is always a pleasure. He is professional, trustworthy, and consistently delivers outstanding results. As a longtime Las Vegas local, he has an exceptional knowledge of the territory and truly understands the market. I highly recommend his services to anyone who is serious about growing their business!
k C. · Google
- ★★★★★
From what I've seen, Justin knows the AI automation space better than most people I've come across in Las Vegas. He's the kind of person who actually understands the technical side and can explain it without making you feel lost. Good guy, good reputation.
Afaryn F. · Google
- ★★★★★
I've Known Justin for a while now and he really knows his stuff when it comes to AI consulting. If people in Las Vegas were to ask me for recommendations in this space, he's the best guy for the job, hands down.
Mickey S. · Google
- ★★★★★
After going back and forth on whether to bring in outside help, we reached out to Justin for some AI consulting advice on where our service business could actually use automation. He was straightforward about what made sense and what didn't. Ended up being a useful conversation. Las Vegas has no shortage of people claiming to be experts, and he's one of the few who could back it up.
Vincent M. · Google
- ★★★★★
Known Justin for a few years now and the guy actually knows his stuff when it comes to AI automation. Friends in the Las Vegas service business space keep asking me who to call and I always point them his way.
Chris M. · Google
- ★★★★★
Justin is one of those guys who actually knows what he's talking about and doesn't cut any corners. Will definitely be working with him again.
David S. · Google
- ★★★★★
Justin knows what he's doing highly recommend using his service he will treat you right and give you tremendous value !👍
Gregory J. · Google
- ★★★★★
Known Justin for a many years and the guy actually knows what he's talking about when it comes to AI and automation. Not the type to just throw buzzwords around. Based in Las Vegas and well connected in the space. …
cindy D. · Google
- ★★★★★
Known Justin for a few years now. Guy knows the AI space better than most people I've come across, especially here in Las Vegas where there's no shortage of people claiming to be experts. He actually understands how AI automation works at a practical level, not just the theory. The kind of person who gives you a straight answer with kindness and patience
Katelyn H. · Google
- ★★★★★
Knew Justin before he started building AI systems for businesses, and watching what he's put together is genuinely impressive. He built out an AI automation setup for my website in Las Vegas and it changed how we handle leads completely. The guy actually runs this stuff himself, so he knows what works.
Justin E. · Google
React Developer
What a React developer does for you
People search for a React developer when they are not sure what they are buying. In practice the job is five things: turning a design into components, connecting those components to your data, keeping the app fast as it grows, writing tests so a change in one place does not break another, and getting it deployed.
A good one also reads other people's code. Most React projects I take on already exist, which means the first week is reading, measuring and writing down what I find. You get that read in writing before you pay for any rebuild.
On salary, which many pages cover: it varies widely by city and seniority, and it is not what you pay me. I quote a fixed price for a written scope, so you are buying an outcome with a defined end, not a salary plus overhead.

React Performance Budget
The performance budget I set before building
A performance budget is a written limit, agreed before the first screen is built, on how much code a page may send to the browser and how long it may take to become usable on a mid-range phone. Every release is measured against it and the numbers go into the release note.
Without a budget, speed is a feeling. With one, a slow release is a failed check that shows up the day it is made, not a complaint three months later.

- The amount of JavaScript a page sends, set per page type
- How long the main content takes to appear on a mid-range phone
- Images sized and compressed on upload, not by hand
- Third-party scripts listed with a reason for each
- A measurement on every release, saved where you can open it
Angular vs React
Is Angular better than React
Neither is better in general. Angular is a complete framework from Google with one prescribed way to structure an app, which suits large teams that want the same shape everywhere. React is lighter and more flexible, which suits teams that want to choose their own parts and a smaller first release. If your team already writes Angular, I would not move it to React for fashion. My Angular page covers when staying is the right call.
React is popular because it is easy to start, has a very large hiring pool and has a deep set of libraries around it. That popularity helps you directly: the next developer you hire will almost certainly be able to read the code.
| Angular | React | Plain HTML and a CMS | |
|---|---|---|---|
| Structure | One prescribed way, set by the framework | You choose; I document the choice | Set by the theme |
| Best for | Large teams and long-lived internal systems | Interactive products and portals | Content sites that rarely change |
| Hiring pool | Smaller, strong in enterprise | Largest of the three | Very large |
| Upgrade effort | Scheduled major releases | Smaller steps if kept current | Plugin and theme updates |
| First release | Heavier setup | Light and quick to start | Quickest |
Netflix, YouTube and React Native
Who uses React, and why that matters
Is Netflix using React? Netflix has written publicly about using React for parts of its web interface. Is YouTube using React? I cannot point to a public source saying it does, so I will not claim it. Which company developed React Native? Meta, and it is still maintained there, so React Native stays a sound choice in 2026 when you need a mobile app and your team already writes React.
Famous apps built with it include parts of Meta's own apps, Shopify's mobile app and some of Microsoft's.
Big names tell you the tool is stable. They do not tell you the app you are building needs it. I choose between React, React Native and a progressive web app by looking at what your users do on a phone, and I cover the third option on my progressive web app page.

React Development Company Process
How a React build runs
Every project runs the same steps, and each one ends with something you can open. The launch date is written into the scope and moves only on the same page, so you see why.
- Step 01
Read what exists
For an inherited app I run the build, read the code and measure the pages. You receive a written list of what is slow, duplicated or unsafe, with the file names, before any change.
- Step 02
Agree the scope in writing
Screens, data sources, integrations and the performance budget on one page. A change later changes that page first.
- Step 03
Build in small releases
Each release is deployed to a private address you can open. Every release note says what changed and what was measured.
- Step 04
Test and connect
Forms are submitted end to end, sign-in is tried with real accounts, and the pages are checked on phones and with a screen reader.
- Step 05
Hand over
The repository, hosting and logins are already yours. I add the written guide and a recorded walkthrough, then stay on call for a stated period.
- Step 06
How remote work runs
I meet you on a call each week, you see a shared tracker of every task, and every release carries a short screen recording. Time zones have not been a problem.
What I Check in an Inherited React Codebase
What I check when I take over
When a project arrives from another agency, I open it in a fixed order. None of this needs your team's time, only read access to the repository.

- Whether it builds from a clean checkout, and how long that takes
- Which dependencies are out of date or no longer maintained
- Whether state is held in one clear place, and whether tests exist and pass
- Where secrets and keys are stored
- What the pages weigh and how fast they become usable
- Who holds the repository, the hosting account and the domain
React Development Company Cost
What moves the price
I quote a fixed price for a written scope after reading what you have, so the number you agree is the number you pay. I do not publish a price list, because a rescue of a slow dashboard and a new customer portal are different jobs. These are the things that move it.

- The number of distinct screens, more than the number of pages
- How much of the code already exists and what shape it is in
- Integrations: payments, a CRM, an identity service, a legacy API
- Whether the app needs sign-in and different roles
- Mobile: a responsive app, a progressive web app or React Native
- Accessibility to a stated WCAG level with a written record
React Development Near Me
I serve clients remotely from Las Vegas
Las Vegas
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Henderson
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North Las Vegas
89030 · 89031 · 89032 · 89081 · 89084 · 89085 · 89086 · 89101 · 89115 · 89130
Summerlin
89128 · 89134 · 89135 · 89138 · 89144 · 89145 · 89148 · 89161
Spring Valley
89102 · 89103 · 89113 · 89117 · 89118 · 89146 · 89147 · 89148 · 89178
Paradise
89074 · 89102 · 89103 · 89109 · 89118 · 89119 · 89120 · 89121 · 89123 · 89158 · 89169 · 89183
Enterprise
89113 · 89118 · 89119 · 89123 · 89139 · 89141 · 89148 · 89178 · 89179 · 89183
Sunrise Manor
89104 · 89110 · 89115 · 89121 · 89122 · 89142 · 89156
Boulder City
89005 · 89044
React Development Company FAQ
Questions owners ask before they hire me
React Development Questions About Cost and Ownership
What owners ask next
Proof, not promises
Case studies I can show you
The Spec-Site Factory: a finished website built before the first sales call
A Las Vegas web design system that builds your finished website from your own public data before the first call, then renders it on demand in under a second. See it, then make it live.
Read the case studyThe Full Website Audit That Crawls Your Whole Site and Scores It 0 to 100
A full website audit in Las Vegas: I crawl your whole site, delegate to specialist agents across technical, on-page, speed, schema, local, and AI search, and return one 0-to-100 health score with a ranked fix list.
Read the case studyMonty and the WebVegas Identity: a full logo family plus a clay Gila-monster mascot with a pose library and motion system
How I built a full logo family and Monty, a clay desert Gila-monster mascot with a pose library and motion system, so a local-service brand is remembered, not forgotten.
Read the case studyRelated Development Services
The rest of what I build
Hire a React Developer
Let me read the code first
Send me read access to the repository or your web address. I will reply with what I would check first, whether you hire me or not.
