Sezai Enes Yıldızhan
Sezai Enes Yıldızhan
Sezai Enes Yıldızhan

Founder, Software Engineer, Project Manager

Founder, Software Engineer, Project Manager

Founder, Software Engineer, Project Manager

Explore My Projects

Explore My Projects

AI Bestfriend

A personalized conversational AI companion using LLMs for emotional support and scheduling.

  • Chat with your AI Buddy

  • 5 AI Personas

  • Free

AI Bestfriend

A personalized conversational AI companion using LLMs for emotional support and scheduling.

  • Chat with your AI Buddy

  • 5 AI Personas

  • Free

AI Bestfriend

A personalized conversational AI companion using LLMs for emotional support and scheduling.

  • Chat with your AI Buddy

  • 5 AI Personas

  • Free

TwoGether

A shared productivity app for couples featuring synced calendars, to-do lists, and private chat.

  • For Couples

  • Get Together with your partner

  • Free

TwoGether

A shared productivity app for couples featuring synced calendars, to-do lists, and private chat.

  • For Couples

  • Get Together with your partner

  • Free

TwoGether

A shared productivity app for couples featuring synced calendars, to-do lists, and private chat.

  • For Couples

  • Get Together with your partner

  • Free

GalaxyFocus

Designed and developed a cross-platform productivity application that transforms daily tasks into a space-themed adventure.

  • Space Themed Focus App

  • Improve Your Focus

  • Free

GalaxyFocus

Designed and developed a cross-platform productivity application that transforms daily tasks into a space-themed adventure.

  • Space Themed Focus App

  • Improve Your Focus

  • Free

GalaxyFocus

Designed and developed a cross-platform productivity application that transforms daily tasks into a space-themed adventure.

  • Space Themed Focus App

  • Improve Your Focus

  • Free

TrackSub - Subscription Tracker

Easily track and manage all your services from streaming platforms to all your favorite subscriptions. Stay organized and simplify your monthly budgeting.

  • Minimalist

  • Useful

  • Free

TrackSub - Subscription Tracker

Easily track and manage all your services from streaming platforms to all your favorite subscriptions. Stay organized and simplify your monthly budgeting.

  • Minimalist

  • Useful

  • Free

TrackSub - Subscription Tracker

Easily track and manage all your services from streaming platforms to all your favorite subscriptions. Stay organized and simplify your monthly budgeting.

  • Minimalist

  • Useful

  • Free

Experience

Founded and lead a software startup dedicated to developing innovative mobile applications. I oversee the entire product lifecycle—from ideation and UI/UX design to backend architecture and deployment. Successfully launched a portfolio of applications (including GalaxyFocus and TwoGether), managing cloud infrastructure and implementing scalable solutions to ensure high availability and user satisfaction.

Founded and lead a software startup dedicated to developing innovative mobile applications. I oversee the entire product lifecycle—from ideation and UI/UX design to backend architecture and deployment. Successfully launched a portfolio of applications (including GalaxyFocus and TwoGether), managing cloud infrastructure and implementing scalable solutions to ensure high availability and user satisfaction.

During my tenure at Kale Holding, I spearheaded the design and execution of a Proof of Concept (PoC) for an AI-Powered RFP Generation Protocol. Utilizing Python and transformer-based Large Language Models (including Hugging Face and Gemini API), I developed a system to process meeting transcripts and perform Named Entity Recognition (NER) to automate the creation of technical documents. This automation protocol was successfully delivered to the internal team for future implementation.

During my tenure at Kale Holding, I spearheaded the design and execution of a Proof of Concept (PoC) for an AI-Powered RFP Generation Protocol. Utilizing Python and transformer-based Large Language Models (including Hugging Face and Gemini API), I developed a system to process meeting transcripts and perform Named Entity Recognition (NER) to automate the creation of technical documents. This automation protocol was successfully delivered to the internal team for future implementation.

During my internship, I supported project managers in ongoing projects and contributed to maintaining the quality of software products delivered to customers. I analyzed project metrics, reported version quality to senior management, and conducted root cause analyses for process improvement. I also provided training on SDLC, metrics, audits, and retrospectives, and actively participated in team retrospective meetings. Additionally, I proposed a Mentorship Program for Junior HSD Campus Ambassadors.

During my internship, I supported project managers in ongoing projects and contributed to maintaining the quality of software products delivered to customers. I analyzed project metrics, reported version quality to senior management, and conducted root cause analyses for process improvement. I also provided training on SDLC, metrics, audits, and retrospectives, and actively participated in team retrospective meetings. Additionally, I proposed a Mentorship Program for Junior HSD Campus Ambassadors.

I joined ESOES in 2021, and later served as a Board Member in 2022, Chairman of the Board in 2023, and Chairman of the Advisory Board in 2024. During my term as Chairman of the Board, ESOES was awarded the “Best Student Club of the Year” and organized events that were featured in national media.

I joined ESOES in 2021, and later served as a Board Member in 2022, Chairman of the Board in 2023, and Chairman of the Advisory Board in 2024. During my term as Chairman of the Board, ESOES was awarded the “Best Student Club of the Year” and organized events that were featured in national media.

During my term as Board Member at ESOES, I was selected HSD Campus Ambassador.

During my term as Board Member at ESOES, I was selected HSD Campus Ambassador.

Eskişehir Osmangazi Üniversitesi

Computer Engineering (2021-2026)

University

High School

Eskişehir Osmangazi Üniversitesi

Computer Engineering (2021-2026)

University

High School

Eskişehir Osmangazi Üniversitesi

Computer Engineering (2021-2026)

University

High School

Certifications

Huawei · Student Campus Ambassador

Google · Foundations of Project Management

Google · Project Initiation: Starting a Successful Project


IIENSTITU · Barista Certificate

Directorate General of Civil Aviation · UAV Pilot Certificate