Every new Florida business filing, every dayFullstack.io
Sizhao Yang, D
is a software development company based in Miami, FL. The LLC filing lists Sizhao Yang as director at the same Miami address, confirming the business.
Filed June 26, 2023 · Miami, FL · Miami-Dade County
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Florida Division of Corporations (Sunbiz) · Entity F23000003837 · Retrieved May 6, 2026
About Fullstack.io
is a Florida custom software development company in Miami, filed on June 26, 2023. Director Sizhao Yang filed through a service, TAGENT, INC., which also serves as registered agent for 133 other entities. The domain was registered on February 19, 2024, about 238 days after filing, through Realtime Register B.V. The website matches the filing name and address. No annual report or EIN on file yet. We estimate revenue between $1 million and $10 million and 6-25 employees.
- Domain registered 238 days after the filing date.
- Filed through a service, TAGENT, INC., which is registered agent for 133 entities.
- We estimate revenue between $1 million and $10 million and 6-25 employees.
- Website identity confirmed matching the filing name and address.
- No annual report or EIN on file yet.
Compiled from the state record, the company's public web presence, and our own research; revenue, employee, and footprint figures are estimates, not verified financials. Updated August 23, 2026.
One of 557 new businesses registered in Miami in June 2023, and the only software development business registered there that month.
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Filing Details
Verified Business Profile
Contact Information
Verified Website Profile
We matched this business to its website and pulled the domain's registration (WHOIS) record. Domain age is one of the strongest signals that a filing is a truly new business and not a re-filing or paperwork change.
Officers / Authorized Persons
Frequently Asked Questions
When was Fullstack.io registered?
Fullstack.io was registered as FORP on June 26, 2023 in Florida.
Where is Fullstack.io located?
Fullstack.io is based in Miami, FL, 33131, in Miami-Dade County.
What type of business is Fullstack.io?
Fullstack.io is classified as a software development business (custom software development).
Is Fullstack.io still active?
According to the Florida Division of Corporations, Fullstack.io's current record status is "active".
Does Fullstack.io have an EIN on file?
No EIN was found on file for Fullstack.io at the time of registration.
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