Top App & Web Developers in Miami-Dade County
From Miami and Coral Gables to Doral, Aventura, Hialeah, and Homestead, App369 builds custom software for teams across Miami-Dade County. We build custom mobile apps, websites, internal tools, and search-ready software systems for teams throughout Miami-Dade County.
App369 is a founder-led software studio based in Boynton Beach, Florida (Palm Beach County). We build custom mobile apps, web platforms and AI features for businesses in Miami-Dade County and beyond, working remotely on Eastern Time.
- Fiverr
- 5.0 · 126 reviews
- Own product
- Workspace369
- Fixed-price offers from
- $450
Why Miami-Dade County Businesses Choose App369
What Miami-Dade County teams should know before working with App369.
Serving Miami, Miami Beach, Coral Gables, Doral, and the wider Miami-Dade County market.
Experience across hospitality, logistics, real estate, fintech, healthcare, and international trade workflows common throughout Miami-Dade County.
Founder-led product strategy, UX, engineering, and SEO execution under one team.
EST timezone coverage for fast communication across South Florida delivery projects.
Related Markets Around Miami-Dade County
Nearby cities and the county hub, for context on neighboring markets.
Software Development Services in Miami-Dade County
Whether your team is headquartered in one city or operating across multiple municipalities inside Miami-Dade County, we build software around the customer journeys, internal workflows, and reporting needs that actually drive results.
Mobile Apps
iOS and Android apps built with Flutter from one codebase, from concept to App Store launch.
Web Development
Fast websites and web applications, built for search and for phones first.
Custom Software
Internal tools, integrations and back-office systems engineered around how your team already works.
Our 4-Phase Development Process
A written scope and four clear phases keep Miami-Dade County projects predictable.
Discovery
Understanding your vision, goals, and market requirements through stakeholder interviews and competitive analysis.
Design
Creating clear UI/UX with interactive prototypes you can click through before we build.
Development
Building with Flutter, Vue.js, Node.js, and GCP using 2-week Agile sprints with weekly milestone reviews.
Launch
Deployment to production with crash and uptime monitoring and ongoing maintenance.
Frequently Asked Questions
How long does a typical project take?
It depends on scope. As a rough guide, a marketing website takes 4-8 weeks, a web application 2-4 months, and a mobile app 3-6 months. Every Miami-Dade County project starts with a written scope and milestone plan, so you know the timeline before any build work starts.
Do you provide ongoing support?
Yes. After launch we offer maintenance that covers bug fixes, iOS and Android OS updates, security patches, dependency upgrades and small feature work, so your Miami-Dade County app keeps working as the platforms change.
What's your pricing model?
App369 uses project-based pricing with a 50/50 payment structure: 50% upfront and 50% on completion. Current ranges are published on our fee structure page, and smaller fixed-price packages are available for well-defined work.
Can you work with existing projects?
Yes. We take over existing codebases, especially Flutter and Firebase apps, for code audits, bug fixes, new features and migrations. Miami-Dade County businesses with an app that stalled or a developer who left can start with an audit before committing to a larger build.
What technology do you use?
Mostly Flutter for iOS, Android and web apps from one codebase, Firebase and Google Cloud for backends, and Vue/Nuxt for websites. For AI features we integrate large language models for assistants, document extraction and automation.
Simon Dziak
As founder of App369, I personally oversee every project we take on, from scoping to launch. I build with Flutter, Firebase and Google Cloud, and I also built and run Workspace369, a client-management platform for freelancers and small businesses. Based in Boynton Beach, Florida, we serve clients across Miami-Dade County and nationwide.
Fiverr reviews / 95 on app work
What buyers said about working with Simon
“Thank you again, Simon, for another QUICK and SATISFACTORY delivery! I highly recommend this seller because he is fantastic! I'm also coming back to buy more services. My requests were a bit over the roof, but his understanding of the task is mouthwatering. Once I saw his delivery, I approved it immediately. And he was very responsive while discussing the details.”
Mark, United States, March 2022. App development on Fiverr “Incredible professional! I am really excited to be working with him on my new application. He will take the time to really understand what your project needs. Simon is the best!”
Mark, United States, March 2022. Custom order on Fiverr “Szymon is very professional, attentive to detail, and organized with his work. I appreciate the help with my project and I will be looking forward to our continued work together. THANK YOU!!!!”
A buyer in the United States, January 2022. Custom order on Fiverr
Read the whole story
- Sixteen five-star reviews from one buyer: mobile apps, app design and a Shopify store (Mark, United States)
- A large custom app build, delivered on the back end and the front end (A buyer in the United States)