Hi, I’m Anton Kozionov
Product designer who owns the outcome,not just the screens.
Product owner and designer at cashtime, a Ukrainian car-collateral lender: I run the backlog for a product team of about six and design what they build. On the side I take my own apps from research to the store in weeks.
- 6+ years
- product owner at cashtime
- prototypes in code
- AI products & evals
- regulated fintech
- end to end
- design systems
01 — Selected work
Products I shaped, and the calls behind them
cashtime
Product owner and designer of a car-collateral loan app; I also built its support bot and a 28-city site network
- Role
- Product owner & product designer, the only PO on the team
- Year
- 2023–now
- Scope
- fintech · product owner
Android: Oct 13
In betaSalient
Private on-device AI for ADHD: research to store build in ten days
- Role
- Solo: product, brand, design and release
- Year
- 2026
- Scope
- on-device AI · solo
- Live
- salient.day
Launching Oct 13Bukvyk
Research-led reading app for Ukrainian kids: prototype to store review in four weeks
- Role
- Solo: product, design and research into how children learn to read
- Year
- 2026
- Scope
- edtech · solo
- Live
- bukvyk.com
Keyword Insights
Took an AI SEO tool from spreadsheets to a product: a design system for ten features and onboarding that works
- Role
- Product designer, founding team (part-time)
- Year
- 2022–25
- Scope
- SaaS · AI
- Founding designer
- Open to work in 2–4 weeks
- Remote EU
02 — How I work
How I decide
Research before pixels
Complaints come before screens.
RIPEN — research agents analysed 873 one- and two-star reviews to my questions; the findings killed two of my own hypotheses before any design.Cut what doesn’t earn its place
Even finished work goes if it doesn’t help the user.
Bukvyk — archived 42 finished AI-generated scenes: a still picture couldn’t make “true or false” unambiguous.Measure, don’t guess
If I can’t put a number on it, it’s an opinion.
cashtime — traced 719 applications: spouse details came up 68 times and had been broken for over a year. It got its own screen.Honest over pretty
A missing feature beats one that lies.
Salient — dropped a small model that found fewer than four in ten items and copied its own instructions into the list: weak phones get no sorting, not fake groceries.AI does the typing, I make the calls
I set the goal, keep the decision log and make the agents prove their work.
Salient — agents raised 173 findings, and others were told to refute the 40 most serious. 37 held; the six critical ones, including the app deleting its own model, are fixed and checked on a phone.
03 — About
The short version
I’ve designed digital products since 2020, across fintech, SaaS and health tech. Since 2023 I’ve been cashtime’s only product owner and its product designer: I write and prioritise the backlog for a team of about six, design the app and the website, and build what the team is missing.
On the side I build my own apps end to end with Claude Code — RIPEN, Salient and Bukvyk. The research, design and decisions are mine; AI agents write the code, and I check what they build.
- 2026–nowFounder, designer · Own productsRIPEN, Salient, Bukvyk — built by directing AI agents; two launch in Oct 2026
- 2023–nowProduct owner & product designer · cashtimeFintech: the only PO, team of ~6, backlog in ClickUp; app, website, brand, AI bot
- 2022–25Product designer, founding team · Keyword InsightsSaaS: web app, landing, SEO content workflow, product videos
- 2023–24UI/UX designer · EdiensHealth tech: ordering online lab tests and diet plans
- 2023Product designer · Aviation Data SolutionsSaaS: web app for airport operations
- 2022–23Product designer · SoulaHealth tech: AI app for pregnant women and new mothers
- 2020–23Industrial designer · ARTKBIndustrial design, technical docs and 3D for hardware makers
- 2020–22Co-founder, product designer & PM · ElekompE-commerce built from scratch with 1C inventory; led dev and content teams
- 2019–20Graphic designer · KRT TVOn-air graphics, intros and programme branding
- 2020MA, Graphic Design (with honours)Kyiv State Academy of Decorative and Applied Arts and Design
- 2018BA, Industrial Design (with honours)National Transport University, Kyiv
04 — Kind words
What people I’ve worked with say
Best designer and product manager out there. Been together through numerous projects from MVP to scaling to profitability, Anton does it all. Top responsibility and communication skills.
Mykola M.CEO, Entropy Mastery
