Julián was not a software engineer looking for a market. He was a padel player waiting for a court—and wondering why everyone had accepted the wait.
Five Hours for a Reply
About three times a week, Julián played padel at Padel Manacor, a padel court in his Colombian city. Booking a court always began the same way: send a message on WhatsApp, then wait for someone at the club to check the schedule and reply. Sometimes the answer came three hours later. Sometimes it took five.
The court might have been available and the players ready, but nothing was confirmed until someone on the other side of the chat found time to respond. For the club, every reservation meant another message to read, another time slot to check, and another customer waiting for an answer.
Julián could see the frustration from both sides. As a player, he wanted to book while the intention was still there. As someone who understood the club, he knew its staff had better things to do than spend the day answering reservation messages. What everyone else treated as an ordinary inconvenience began to look to him like a problem that could be rebuilt.
“I don’t want you to be texting all the time. I want you to be doing other things.” — Julián
Fifteen Days into Something New
Before then, Julián had worked as a medical interpreter—a job built on listening, then turning complex language into something clear. He was 27, curious about AI, and had recently begun exploring whether he could use it to solve problems for local businesses. He had no software engineering background—only a problem he had lived himself. As a player, he had seen the same pattern across his city: padel clubs, soccer facilities, and other appointment-based businesses still running on chats and spreadsheets, where bookings could be missed and schedules stayed invisible. If AI could turn one such friction into a working system, the same approach could reach many more.
Roughly fifteen days into this new direction, he set his sights on Padel Manacor—the court where he played. The idea: a booking service customized for the court, so clubs like it could stop running reservations through chats and spreadsheets. He asked an AI which platform could help him build it, and the answer was Enter. He could describe the booking flow in Spanish and bring the interface, database, and accounts together without first becoming an expert in the technology. The experience felt natural enough that he joked:
“It’s like they speak better Spanish than me.” — Julián
The first person he showed was a friend—the owner of Padel Manacor, the court where Julián played. Julián sent him a message, promised an idea worth seeing, and recorded a quick video of what the club’s booking experience could become. Within a couple of hours, they were meeting in person.
“This is so amazing. This is what I needed.” — Padel Manacor’s owner
That first yes did not mean the product was finished. It meant the problem was real to someone besides Julián.
First Yes Was Only the Beginning
The first version came together quickly; making it something a club could rely on took longer. Julián had to make registrations, logins, court information, and reservations work together—and when the club asked for changes, such as the ability to apply discounts, the system had to grow around the way the business actually operated. It became a steady rhythm of build, test, connect, and adjust, with Enter letting him stay close to the solution instead of handing the idea away each time something changed.
Eventually the system left his screen. Padel Manacor shared it on Instagram and in a WhatsApp group of roughly 300 members; by mid-September, 35 customers had registered. When one customer thanked the club in the group for giving players an easier way to reserve—and other members answered with hearts—it was the moment the work came back to Julián from the people it was meant to help.
“I can keep doing this. I can keep looking for customers.” — Julián
Giving Courts Their Time Back
For Padel Manacor, the change shows up as work that disappears. Before Julián's booking service, staff spent part of every day reading WhatsApp reservation messages, checking the schedule by hand, and answering the same questions one by one. Every reservation carried a time cost the club had simply accepted.
“I can make a reservation in 30 seconds. I’m so proud I was able to create that with you.” — Julián
The player side changed just as clearly: the same player who once waited three to five hours for a reply can now complete a reservation in about 30 seconds. The court no longer has to stand between every customer and every open court—staff stopped checking availability and answering the same questions message by message, the schedule now lives in one place, and bookings are less likely to slip through the cracks or collide with another reservation.
Padel Manacor is Julián's first paying customer: the court pays a setup fee to build and launch the system, plus a small monthly fee to keep it running and updated. The business side is already moving: through Enter, Julián has brought three more merchants on board. He is now carrying that approach to more merchants in more places: studying how each handles reservations, then building a customized sample that makes another way visible. The foundation can be reused, and his ambition reaches beyond one city: a portfolio of booking systems for courts and appointment-based businesses across Colombia and, eventually, markets such as Brazil.
The old wait was measured in hours; the new action can be measured in seconds. For Julián, those 30 seconds—and the time they give back to every court—are not the end of the story; they are the beginning of what he now knows he is capable of building.
