Custom software development

Software built around
how your business runs.

Business platforms, mobile apps and connected systems for companies that have outgrown spreadsheets, paper and group chats. You work directly with the engineer who builds it.

Discuss your project See our work
What we do

What we get asked to solve

The operation runs on spreadsheets

When the business has outgrown shared files, paper forms and group chats, we build the system that replaces them: scheduling, work orders, inventory, invoicing, and the admin panel to run it all. APIs, database and server included.

It needs to work away from a desk

Field crews, drivers, customers and staff who are never at a computer. Cross-platform iOS and Android apps built in Flutter, from first screen to store submission and the releases after it.

The idea has to charge customers

Turning a product idea into something that signs people up and bills them: accounts and roles, subscriptions, notifications, analytics, and a dashboard the owner can actually read.

Our work

Products we've built

Eight shipped products — some our own, some built for clients. Open any one to see the problem it solves and what is behind it.

SaaS platform

DoLoyalty

Digital loyalty cards for local businesses — QR check-ins, push campaigns and a dashboard that shows who came back.

Read the detail
The problem
Local businesses still run loyalty on paper punch cards. The card gets lost, and nobody can tell which customers actually return.
What we built
A loyalty platform where customers check in with a QR scan and the business sees the visit history behind it.
Under the hood
iOS and Android apps, web dashboard, subscription billing, push campaigns, visit analytics.
Why it matters
Repeat business stops being a feeling and becomes a number the owner can act on.
doloyalty.com
Tournament software

NextGen Esports

Registration, brackets, multi-judge scoring and live court displays for martial arts events.

Read the detail
The problem
Martial arts tournaments were run on printed brackets, hand-tallied scores and a fresh spreadsheet for every event.
What we built
One platform that carries an event end to end: online registration and payment, divisions and bracket generation, scoring from several judges at once, and live results on the screens at each court.
Under the hood
Over 1,200 division templates, bracket generation for multiple formats, judge-to-court routing, printable event documents, a coach-facing app.
Why it matters
A full day of competition on several courts runs on it in real time, with results visible as they are entered.
nextgenesports.us
Operations system

Nelson Jones TC

The daily operation of a training center — spaces, work orders, inventory and billing — plus an app on the App Store.

Read the detail
The problem
A training center tracking occupied spaces, daily work orders, supplies and monthly charges across paper, memory and phone calls.
What we built
A web system the staff uses all day, and a mobile app, published on the App Store, for the people who are never at a computer.
Under the hood
Space assignment, work orders, inventory, monthly billing runs, a client-facing area, push notifications on iOS and Android.
Why it matters
The same records that run the day produce the invoice at the end of the month — nothing gets re-typed, and nothing gets missed.
nelsonjonestc.com
Live video

Nelson Jones cameras

Live camera feeds for the same facility, reachable from anywhere.

Read the detail
The problem
The owner needs to see the property without being on it.
What we built
A camera system with live feeds available over the web, running on the facility network we set up and maintain.
Under the hood
Camera streaming, remote access, network and VPN configuration.
Why it matters
One login answers the question that used to require a drive out there.
cameras.nelsonjonestc.com
Sports data

pool352

Live prediction-market odds, cross-referenced with real schedules and tracked over time.

Read the detail
The problem
Prediction-market prices are public but scattered, and nobody shows how a price moved on the way to a game.
What we built
A platform that pulls live odds from two exchanges, matches them against official schedules, and keeps the price history.
Under the hood
Integrations with several third-party APIs, cached aggregation so pages load instantly, background workers recording snapshots, a public NBA reference section.
Why it matters
A demonstration of the harder half of most projects: making several outside systems agree with each other, on a schedule, without anyone watching.
pool352.com
Monitoring

OwlSignal

Uptime monitoring that tells you a site is down before your customers do.

Read the detail
The problem
Most small businesses find out their site is down when a customer calls.
What we built
A monitoring service that checks sites and endpoints on a schedule and raises an alert when something stops answering.
Under the hood
Scheduled checks, alerting, admin panel.
Why it matters
The gap between an outage and finding out about it goes from hours to minutes.
owlsignal.com
iOS game

Domino Plus

Dominoes for iPhone, on the App Store — real-time multiplayer with a shot clock.

Read the detail
The problem
A classic game, but played against other people, live, with the pressure of a clock.
What we built
A native iPhone game published on the App Store, with real-time multiplayer.
Under the hood
Flutter client, WebSocket server for live play, turn timer, App Store release pipeline.
Why it matters
Proof that the same shop handles consumer apps and store releases, not only internal business tools.
View on the App Store
Content production

The video wall

Every short-form video produced for clients, one cover per square.

Read the detail
The problem
Content for a local business usually means starting from a blank page every single time, which is why it stops after a month.
What we built
A production line instead: structured data in, overlay and caption generated, publish, record the result. The wall is the output.
Under the hood
Database-driven asset generation, image pipelines, per-client templates, a public gallery with filtering.
Why it matters
The volume is the argument. It is the same engineering thinking applied to something that is usually done by hand.
portfolio.123yotta.com

Something in here look like your problem? Tell us about it.

How it works

Four steps, no mystery

Most people have never commissioned software before. This is the shape of it, so you know what you are agreeing to.

01 — DISCOVER

Understand the business

How the work actually gets done today, where it breaks, and what a fix would be worth. Usually a conversation and a walk through your current process.

02 — DESIGN

Define the solution

Scope, screens, data model and the order things get built in. You see what you are getting before anyone writes code.

03 — BUILD

Build and refine

Development in visible increments, with the real integrations wired up and tested against your real cases, not a demo dataset.

04 — LAUNCH

Launch and support

Deployment, store submission where it applies, and an arrangement for maintenance that we agree on in writing.

Who you work with

You talk to the engineer

123Yotta is a one-engineer studio in Ocala, Florida, run by Freddy Arenas — a computer engineer with more than 20 years building business applications, backend platforms, automation and custom integrations. The company was formed in 2023; the experience behind it is considerably older.

That means no account manager relaying your requirements to someone you never meet. The person who sits down to understand your operation is the person who designs the database, writes the code, provisions the server and submits the app.

It also means being honest about size. This is not a large agency and does not pretend to be one. For projects where deep involvement and direct access matter more than headcount, that is the advantage.

20+ Years engineering
8 Products shipped
FL Ocala, Florida
Full Stack coverage
Get in touch

Tell us about your project

A few lines about what you are trying to solve is enough to start. You will hear back from Freddy, not from a sales team.

Or write directly to admin@123yotta.com · Ocala, Florida