Defter — SME accounting dashboard
We redesigned an accounting product used by tens of thousands of SMEs: new IA, design system and accessible components.
Product Designer & Full-Stack Developer
I am a Product designer
I turn complex business processes into simple, fast and accessible digital products. For nine years I have worked end-to-end with startups and enterprises, from idea to launch.
Hi, I'm Deniz — a product designer and full-stack developer based in Istanbul. I started as a graphic designer and learned to code to build my own designs; today I work where the two meet. I believe in processes that start with research, are validated with prototypes and end with measurable results. Lately I focus on design systems, SaaS dashboards and accessibility. Outside work you'll find me at the pottery studio…
We redesigned an accounting product used by tens of thousands of SMEs: new IA, design system and accessible components.
A community-driven mobile app that suggests safe urban cycling routes.
Logo, packaging and online store for an independent pottery studio.
From research to high-fidelity prototype: user flows, information architecture and testing.
Project-based quote
Scalable, fast and accessible web apps — from design to launch.
From €1,500
Component library, documentation and governance so teams speak the same language.
Monthly retainer
Audit against WCAG 2.2 criteria with a prioritised report and remediation support.
From €600
Kuzey Yazılım ·İstanbul (hibrit) ·Full-time
Leading a team of six designers and front-end engineers on an accounting & inventory SaaS.
Pera Dijital Ajans ·İstanbul ·Full-time
Web apps and corporate sites for retail, healthcare and education brands.
Serbest ·Uzaktan ·Freelance
Brand identity, websites and e-commerce for small businesses and startups.
Mavi Kare Reklam ·İzmir ·Full-time
Print and digital campaigns, packaging and corporate identity.
Deniz is one of those rare people who bridge design and engineering. Thanks to the design system our team doubled its pace.
The way Deniz ran client workshops and turned complex requests into simple screens made a difference on every project.
Deniz understood our brand better than we did. Our online sales tripled with the new store.
On schedule, clear communicator and detail-oriented. We can't wait to work together again.
Five questions to ask before building a component library, and a practical roadmap for small teams.
Read postNew criteria in WCAG 2.2 and the ten accessibility mistakes teams miss most often.
Read postSeven design principles that shorten decision time on data-heavy screens, with examples.
Read postI'd love to hear about it. A short message is enough; I usually reply within 1-2 business days.