[Case Study] Designing Screens Directly Inside the Meeting Leaves Clients Astonished 😲. How "VibeCoding" Shattered the Old World of IT Development.

"I see. So, would a screen image like this work?"

During our meeting, the representative from Company L, whom we’ve been working with for five years, casually presented a proposal to us—an IT development company. But it wasn’t a rough PowerPoint mockup. It was a live, working HTML page generated right then and there using Gemini. 😲😲😲👍👍👍

The "VibeCoding" methodology we spent six months sharing with them in the past has now borne fruit in the hands of our client, resulting in this "unprecedented, hyper-speed development."

Today, I’d like to share the story of the exact moment the boundary between "client and contractor" dissolved thanks to AI, and the existential value of IT was redefined.

The Shock of a "1-Month Alignment" Finishing on the Spot

Think back to what used to be "normal" in traditional system development:

1. The Meeting: Discussing requirements verbally.
2. 1 Week Later: We prepare and present the UI/UX design.
3. Another Week Later: The client reviews it internally and sends back revision requests.
4. Yet Another Week Later: We submit the revised proposal.

In the end, development would finally kick off a full month after the initial meeting. That was the "standard." But things are different now.

The UX intuition, the client's satisfaction, the order of steps—at the exact moment we discuss them in the meeting, the client prompts Gemini and outputs the ideal screen in HTML. We simply take that HTML back and immediately move to implementation.

"One feature implemented every two days." What used to take a month is now compressed into just a few days. This scene can no longer be described by the mere word "efficiency"—it is a disruptive paradigm shift.

Where Does "Our Value Proposition" Go?

When clients can create screens on their own, does the value of IT professionals disappear?

The answer is a resounding no. In fact, this is where our true skills shine.

Breaking down a single HTML page into maintainable components, optimally decoupling the Frontend and Backend, designing a scalable database, and plugging it all into a containerized deployment... The ability to construct this "under-the-hood blueprint" at hyper-speed using AI is the new "AI Power" we have acquired.

• Rational Prompt Engineering: The power to accurately shape intent.
• Spec-Driven Development: Design precision capable of end-to-end execution.
• Leveraging Agent Tools: Crafting optimizations for skills, restricted files, and CLIs to prevent development from looping.
• Mastering Multi-LLMs: The discernment to identify characteristics and choose the optimal AI depending on the situation.

Context Engineering, MCP, Harness Engineering... Absorbing continuously evolving technologies and redesigning new workflows that integrate "processes only AI can do." To be honest, our brains are firing on all cylinders like never before. As knowledge workers, there has never been a more exciting time to be alive.

Do You Have the Courage to Enjoy "Hyper-Speed"?

However, for such an amazing mechanism to work, we need the "final piece"—something far more important than technology.

And that is whether the clients themselves have the will to take a step onto this new AI path. It comes down to whether they are ready to embrace this incredibly convenient and efficient "New WorkStyle."

We are different from other IT vendors. We don’t hold back; we give our all to provide the best and most cutting-edge technology and services. However, those on the receiving end are also being tested on their "courage to change themselves."

There was a hilarious segment on the popular Japanese TV show *Wednesday's Downtown* that explored a unique theory: "The Theory that if a restaurant serves your food *too* fast, it's actually kind of terrifying." Reference: https://youtube.com/shorts/LfFmu6rfDK8?si=j6AhfpcnM53Ywxv7

If you walked into a restaurant and the food appeared the exact second you ordered... how would you react? Would you rejoice and say, "Wow, amazing! Let's have a great time!", or would you get spooked, think "This is too fast, it's creepy..." and walk out?

The same goes for today's development frontline. The "future" you ordered appears right in front of your eyes the very next day. Can you get thrilled and jump on board with this sense of velocity? We want to put our full weight behind clients who have that kind of courage.

IT Business Enters the Phase of Breaking Down "Information Walls"

We will personally tear down the wall of the "IT information gap" built in the old world. The business model of hiding knowledge, keeping things in a black box, and collecting "ransom" in the name of maintenance fees is over.

We provide the latest wisdom without hiding it, accelerating our clients' businesses to the absolute maximum. Through DX (Digital Transformation), we give our full support to ensure our clients win in the market.

We don't sell products; we provide "speed to the future."

The AI-driven new era is already right in front of us. We will continue to break a sweat intellectually, working alongside our clients to create "landscapes yet unseen."

Heading into the future with passion. We are ready for the AI-Native Era.