Find the real problem
I talk to customers and look at the data before designing anything.
Öykü Kosma · Lead UX Designer
I love being a designer because I get to be curious for a living, untangle tricky problems, and bring joy to the tools people use every day.
- LLM-native product design
- Enterprise SaaS
- Design leadership
- Strategy & research
How I work
From the real problem to results you can measure
Test early with real users
I prototype quickly, with AI and in code, and put it in front of people.
Design systems, not screens
I turn solutions into patterns teams can reuse.
Measure and keep improving
I agree on success up front and follow up after launch.
Selected work
01 · 2025Case study
HERE Technologies
HERE Developer Assistant: from answering to finishing
v1 answered questions and sent developers elsewhere. v2 finished the job. Testing with real developers showed it also had to be honest.
3% → 18% retention at 8 weeks40% → 75% self-resolution
Read case study
02 · 2019–2021Case study
Spark Networks
Spark, a dating app for Gen Z
A profile system built on interactive frames so people could show who they are instead of picking the right photo.
117 user interviews shaping the redesign11 frames shipped from 30+ concepts
Read case study
03 · 2025Protected
HERE Technologies
Usage alerts
Admins choose their own limits and get an email before a spike becomes a large bill.
30% fewer support tickets in the first monthLaunched in 3 months, instead of the estimated 6 to 9
Read case study
04 · 2025Protected
HERE Technologies
Usage analytics
A usage view that starts with what changed, so admins can quickly find the cause of higher spending.
Under 30 seconds to find the cause, down from 3 to 4 minutesBuilt on existing data, instead of a project of several quarters
Read case study
The journey · 10+ years
10+ years of shipping software people actually use, now leading UX for AI-native B2B tools.
Impact, in numbers
shipped at HERE , validated with enterprise customers
−96%
Billing corrections
30%
PayGo adoption
3% → 18%
AI assistant retention
40 → 75%
Self-resolution
−45%
Time to resolve
−30%
Support tickets
Work Experience
2021 – Present
−96%Billing corrections3% → 18%AI retention−45%Time to resolve
- Lead UX Designer, April 2026 – Present
- Senior UX Designer, April 2024 – March 2026
- UX Designer II, 2021 – March 2024
- Reframed a blocked cost-transparency brief into anomaly detection, validated with enterprise customers: billing corrections down 96% and PayGo adoption at 30%.
- Repositioned the LLM Developer Assistant from a chat interface to a task-completion tool: retention 3% → 18%, self-resolution 40% → 75%, time-to-resolve down 45%.
- Redesigned Usage Management, cutting support tickets by 30%; the resulting patterns were contributed to the HERE Design System.
- Introduced AI into the design workflow, validation, usability testing and code handoff via Kiro, closing the gap between design and engineering without losing quality.
- Built design structures the wider team follows, setting direction where ambiguity is highest.
- My first project at HERE was HERE Last Mile, covering real-time tracking and logistics operations.
2019 – 2021
2.0 → 4.3App Store rating+15%User retention
- Took the App Store rating from 2.0 to 4.3 in three months with no paid marketing; retention up 15%.
- Built the design system from scratch for a team of eight engineers shipping weekly; later adopted across other Spark Networks apps.
2019
- Design sprints, system maps and storyboards supported cross-functional exploration of future urban mobility.
2019
- IBM Design Thinking Practitioner certified.
2017
+20%Mobile engagement
- Contributed to Biletix winning 1st Prize at the 15th Altın Örümcek Awards.
2015 – 2017
- Projects included a Jaguar Turkey landing page, an insurance tool for Ataflex and a student exam-calendar app.
Education
MSc Product-Service System Design
Politecnico di Milano · 2017–2021
BSc Industrial Product Design
Istanbul Technical University · 2011–2016
Product & Digital Creative Design (Exchange)
HOWEST, Belgium · 2015–2016
Design & AI toolset
FigmaClaudeLovableKiro
Core craft
LLM-based product & interaction designStrategic design & design leadershipUser research & synthesisDesign systemsWorkshop facilitationCross-functional collaboration
Languages
English, full professional · Turkish, native · German, B1