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Stocked by

Vlad-Andrei Cristea

16 / Pirmasens, Germany

I’m building AgentBay. I also made ScribbleOffice and worked on LeadUptime. They’re on the top shelf.

In the machine

Insert the coin, then pick a slot

Vlad-Andrei Cristea

Student founder & software developer

Pirmasens, Germanyvlad@cristea.tech

ProjectsA1–A4

AgentBay

AI-assisted secondhand marketplace

I started AgentBay after noticing how much effort it takes to list items you no longer use. It has its own app and discovery feed, with assistant tools that help people identify, describe, price, find, and offer on items.

The owner reviews and approves listings and offers. An early product has been tested with four friends; broader launch work remains on payments, shipping, trust, and support.

ScribbleOffice

A writing workspace for schools

I founded ScribbleOffice and led its technical development. It brings assignments, collaborative editing, teacher feedback, and replay of a student’s writing process into one workspace.

Built with Next.js, React, TypeScript, PostgreSQL, TipTap, and Yjs. It is still an early-stage product, without a completed school pilot or paying school customers.

scribbleoffice.com

LeadUptime

Detecting broken lead journeys

I worked on a tool that follows a business’s lead path: opening the landing page, submitting a form, and checking that the expected success state appears.

It includes browser automation and a WordPress integration. The project is in pre-release validation.

leaduptime.com

My first published game

The project that started it all

At about 11, I published a Roblox game without paying for advertising. It reached 40,000 visits and around 32 concurrent players at its peak.

It taught me that building is only the first step: people have to choose to use what you make.

EngineeringB1–B4

Web product engineering

From interface to database

I work with JavaScript, TypeScript, React, Next.js, Node.js, PostgreSQL, APIs, and browser automation. I have built across several product categories rather than a single feature or stack.

I use AI coding tools heavily and take responsibility for product decisions, integration, review, debugging, and testing.

AI connected to useful work

Assistants with human approval

My work includes connecting AI assistants to external services and designing flows that help users act on suggestions. In AgentBay, the assistant can prepare a listing or help find an item while the person stays in control.

I am interested in persistent memory, causal reasoning, planning, and learning from outcomes.

Open-source contribution

A precise fix in an existing codebase

I contributed a fix to AWS Lambda Powertools for Python for how LRUDict.get() behaves when a missing key is requested with a default value.

That work meant reproducing the bug, fitting the fix into an established project, and responding to review.

GitHub

Research and exploration

Curious beyond the current product

I am exploring computational physics and writing a research paper that is still in progress.

I have also explored modular AI hardware and assistant-controlled payments as concepts. Neither is a launched company or proven hardware.

MilestonesC1–C4

AgentBay friend-group pilot

Early evidence, clearly scoped

Four friends created 58 physical-item listings; 44 began with AI suggestions, about 76%. Five other students asked for access.

Across all 231 listings, including Minecraft items, the pilot had 35 agreed sales totaling €1,492.32. That value was not AgentBay revenue.

Global EdTech Startup Awards

2026 regional semifinalist

ScribbleOffice was selected to pitch at the 2026 Global EdTech Startup Awards regional semifinals.

The online pitch is scheduled for 11 November 2026. The semifinal result is still ahead of us.

Building with other people

Deadlines, teams, and clear pitches

I have taken part in hackathons in Karlsruhe-Durlach and Fulda. At Fulda, I worked with a team on QuestNest.

I have also participated in Model United Nations and other school activities that involve research and presentation.

Education

Leibniz-Gymnasium Pirmasens

I am in 11th grade and working toward the German Abitur while building software alongside school.

I began learning to build at around 11 through Roblox and Lua, and have continued learning much of my technical work independently.

AboutD1–D4

About me

Romanian roots, building in Germany

I am a 16-year-old Romanian developer and founder living in Germany. I focus on products that solve problems I have experienced or observed myself.

Outside software, I play tennis, enjoy fitness, and keep learning about science and technology.

Languages and perspective

Working across borders

Romanian and German are part of my everyday background. I work and communicate in English and am developing it toward C1. I also speak French and have HSK 1 Mandarin.

Growing up in Germany with a Romanian background has made me comfortable thinking beyond one country or market.

Résumé (PDF)

A concise printable version

Download a one-page overview of my education, projects, engineering work, and early results.

Download PDF

Get in touch

Build, test, or challenge an idea

My main focus now is AgentBay. I am preparing a Y Combinator Winter 2027 application and looking for people who can challenge the product and help test it with real users.

If my work is relevant to you, I would like to hear from you.

vlad@cristea.tech · Website · GitHub · ScribbleOffice · LeadUptime