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Ertu O.
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Building the island
Ertu Ozdenli

Ertu Ozdenli

Senior Product Engineer · Bucharest, Romania

I build products,not just interfaces.

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01 / Selected Work

Products I've brought to life.

A selection of products I've designed, developed, and shipped—from AI-powered mobile apps to real-time experiences and tools for online businesses.

Index06 projects
  1. 01ArchieAI · Mobile Application
  2. 02PlinkReal-Time · Multiplayer Gaming
  3. 03BabywiseHealth · Mobile Application
  4. 04CogniwareCognitive Training · Web & Mobile
  5. 05MatterShopify · Theme Development
  6. 06GetChessMemesCreative Tool · Independent Project
01AI · Mobile Application
An empty, sunlit room with herringbone parquet — the original photo
The same room redesigned by Archie with dark walls, a chandelier and a green velvet sofa
BeforeAfter

Archie

Reimagine any space with AI.

Archie is an AI-powered interior design app that helps people explore new possibilities for their spaces.

Stack
React Native · Expo · TypeScript · AI Integration · iOS
Platform
iOS
Explore Project
03Health · Mobile Application
MyBabyWise App Store screenshot: a reassuring journey, every day
MyBabyWise growth tracking with a chart of weight measurements
MyBabyWise milestone timeline: remember every first

Babywise

A calmer way to follow your child's growing story.

Babywise (MyBabyWise) is a parenting app for iOS and Android that brings a child's records and age-appropriate guidance into one place.

Stack
React Native · Expo · TypeScript · Supabase · RevenueCat · Next.js · Fastlane
Platform
iOS + Android
Explore Projectgetbabywise.com
04Cognitive Training · Web & Mobile
usecogniware.com
Cogniware homepage: train your brain like you train your body, with today's plan and the four domain scores

Cogniware

Train your brain like you train your body.

Cogniware is a cognitive training app with short, adaptive sessions across attention, timing, impulsivity and hyperactivity.

Stack
Next.js · TypeScript · React Native · Expo · Supabase · Stripe · Gemini API
Platform
Web + mobile
Explore Projectusecogniware.com
05Shopify · Theme Development
Matter · furniture preset
Matter theme homepage with a full-bleed living-room hero, search and category navigation
Matter theme on a phone, with the mobile header and hero

Matter

A premium Shopify theme for furniture and home retailers.

Matter is an Online Store 2.0 theme built on Shopify's Skeleton architecture, with a token-driven design system that merchants control entirely from the theme editor.

Stack
Shopify · Liquid · Tailwind CSS · JavaScript · Section Rendering API · Theme Check
Platform
Shopify Online Store 2.0
Explore Project
06Creative Tool · Independent Project
Illustration

GetChessMemes

Turn your chess games into something worth sharing.

GetChessMemes turns chess games into animated meme videos.

Stack
Next.js · TypeScript · Stockfish · HTML Canvas · Cloudflare Pages
Platform
Web
Explore Projectgetchessmemes.com

More things I've built

Before working under my own name, I ran Seksen Yirmi, a small Istanbul studio. Its reference list covers 24 clients across psychology, health, education, publishing, law, real estate and retail. A few highlights:

  • SOBECE Online

    A video session platform that let psychologists run SOBECE, a structured social-skills programme, with their clients online — with real-time audio, video and role-based sessions.

    Vue.js · WebRTC · Real-time

  • Galifo · Innvitee

    UI/UX and web development for event products: planning, participant invitations and post-event surveys, plus a customer management panel.

    Web app · UI/UX

  • E-commerce Experiences

    Custom Shopify storefronts, themes, integrations and commerce solutions built for real businesses.

    Shopify · Liquid · GraphQL

  • Websites for independent professionals

    Fast static sites on Cloudflare Pages, set up so their owners can update content through AI coding agents, with automated checks guarding every release.

    Next.js · Cloudflare Pages · Playwright

02 / What I Do

Engineering across the whole product.

My strongest work happens where frontend engineering, product thinking, and execution meet. I enjoy building the experience people see—and solving the technical problems that make it work.

I care about the details, but I never lose sight of the product.

03 / Approach

From idea to something people can actually use.

Good engineering is more than writing good code. It's about understanding the problem, making sensible decisions, and getting useful software into people's hands.

  1. 01

    Understand the Problem

    Start with the user, the business need, and the constraints. The goal is to solve the right problem before deciding how to build it.

  2. 02

    Build with Intent

    Choose the right architecture and tools for the job. Keep the experience intuitive and the codebase maintainable.

  3. 03

    Ship the Product

    Take responsibility for the complete delivery process, including integrations, testing, deployment, and release.

  4. 04

    Learn and Improve

    A launch isn't the finish line. Real usage, feedback, and product data should inform what happens next.

04 / About Me

Curious by nature.An engineer by profession.A builder at heart.

Portrait of Ertu Ozdenli, smiling with arms crossed, in warm window light
Ertu OzdenliBucharest
Based in
Bucharest, Romania
Experience
10+ years
Languages
Turkish, English
Off-screen
Chess, usually

Hey, I'm Ertu.

I'm a software engineer based in Bucharest, Romania, with more than a decade of experience building digital products.

My background started in web development and naturally expanded into mobile applications, backend systems, e-commerce, and product engineering.

Over the years, I've worked across different teams, technologies, and industries. I've built products for businesses, helped turn ideas into working applications, and launched my own software projects.

What I enjoy most is the process of making things real.

I like working close to the product, understanding how people use it, and finding practical solutions to technical challenges.

Whether I'm building a mobile app, designing a frontend architecture, connecting third-party services, or preparing a release, I care about creating something that works well and feels right.

Outside software, I spend a fair amount of time playing chess. Sometimes that interest turns into another side project.

I believe the best software comes from people who care about both how it works and why it exists.

05 / Experience

Built through experience. Driven by curiosity.

More than a decade of building interfaces, applications, and products across different environments—from collaborative engineering teams to independent product launches.

  1. 2025 — Now

    WeCraft Labs

    Co-Founder & Senior Product Engineer

    Building and shipping mobile apps, web experiences, AI-powered products and e-commerce tools — working across product decisions, architecture, integrations and deployment.

  2. 2022 — 2024

    Socialays

    Senior Frontend Developer

    Built Vue.js single-page applications and social platform integrations for an AI-powered social media assistant, as part of a sprint-based product team.

  3. 2021 — 2022

    Sobece

    Frontend-Focused Full-Stack Developer

    Built a Vue.js and WebRTC video conferencing app with real-time audio, video and role-based sessions.

  4. 2016 — 2025

    Seksen Yirmi

    Senior Full-Stack Developer & Founder

    Ran Seksen Yirmi, an Istanbul studio building custom web and mobile apps, websites and online stores — with Vue, React, Next.js, Node.js and PHP, owning delivery from architecture to production.

  5. 2013 — 2016

    Altın Açı

    Frontend Developer & Co-Founder

    Responsive websites and custom WordPress themes for client projects.

Client words

What the people I built for said.

SOBECE Online
“Working together, they were fast and creative in making our plans real. They made the SOBECE brand rich, strong and effective on an online platform. Ertuğrul and his team handled every request with care and solved problems quickly and effectively.”

İlknur E. · Psychologist · Psychodramatist

Aygün Tuçe A. · Clinical Psychologist

Translated from Turkish

Published on seksenyirmi.com

24clients

served during the Seksen Yirmi years, across

  • Psychology
  • Health
  • Education
  • Publishing
  • Law
  • Real estate
  • Retail
  • Events

What I built

SOBECE Online

A video session platform for running SOBECE, a structured social-skills programme, online — real-time audio and video with role-based sessions.

Vue.js · WebRTC · Real-time

06 / Let's Connect

Have something interesting in mind?

I'm always interested in meaningful products, ambitious engineering challenges, and working with people who care about what they build.

If you're putting together a great product team or have something worth discussing, I'd love to hear about it.

Let's TalkView LinkedIn