Cristian Selar

About

Founder and product & marketing-focused builder who bootstrapped and scaled an AI study assistant to $50K ARR in 6 months, owning product and growth end to end. Experienced with AI training/evaluation and prompt engineering, and hands-on with UX design and front-end development (React/Next.js, TypeScript, Tailwind, shadcn/ui).

Experience

• Cofounder, Product & Growth · Tutie AI02-01-2024

  • Bootstrapped and scaled an AI study assistant to $50K ARR in 6 months, built part-time by a 3-person student team in Greece • Led the pivot from a note-sharing product (Uninote) to an AI tutoring platform to unlock a scalable business model, after finding out that 40% were copying notes to ChatGPT • Owned product end to end: user research, UX design (Figma), front-end development (React → Next.js), analytics, and iteration • Fully redesigned and rebuilt the product using Next.js, TypeScript, Tailwind, shadcn/ui, optimizing every change for conversion, retention, or revenue • Drove user acquisition from 0 to 24K through data-driven growth campaigns including offline QR sticker campaign (5,000 scans, first 600 users) and UGC exam content (3M organic views), achieving 7M+ impressions with zero ad spend AI Trainer / Prompt Engineer, DataAnnotation (NY, US – Remote, Jan 2024 – Jan 2026) • Contributed to the training and evaluation of large language models used by leading AI organizations • Evaluated model outputs, identified failure modes, and provided structured feedback to improve quality and alignment • Worked on tasks related to front-end, design, and code generation, strengthening practical AI-product intuition • Developed strong expertise in prompt engineering, evaluation rubrics, and quality standards

• Sales Roles · BAT, Pop-Air01-01-2022 – 12-31-2023

  • Early experience in sales, developing strong communication skills and customer intuition • Contributed to revenue growth through direct customer interaction

Education

• Athens University of Economics and Business (AUEB)BSc, Management Science & Technology

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