Senior Product Designer Design Engineer 10+ years Open to senior product roles, IC track

Nothing ships without a source.

I design products end to end and build them in code. Every screen traces back to a decision, every decision back to evidence, and anything still unproven is marked [?] rather than smoothed over.

02 What I do Three, not ten
01

Product and business thinking

I score the jobs before anything gets built. I argue funnels, retention loops and pricing gates in writing, then defend them. I arrive with an opinion about what the business needs, not a list of screens to draw.

02

Systems and architecture

Entities, flows, sitemap, then a written spec for every page and every state. Nothing appears for the first time inside a wireframe. A prototype renders a finished structure; it does not invent one.

03

Design engineering

I build the thing. Responsive prototypes, design systems and production HTML, CSS and JavaScript, shipped from my own machine at the speed the decision was made. This page is one of them.

Research / Personas / JTBD / CJM / IA / Wireframes / Voice / Concept / UI / Tokens / System / Responsive / Motion / Handoff / 
Evidence / Traceability / States / Edge cases / Microcopy / Accessibility / Defect log / 
The method

Twelve stages, run in order, on every product. Each one leaves a written source of truth and a defect log behind it. Slower to start. Far faster to finish, and much harder to argue with.

04 How I work Same order, every product

Nothing appears downstream that was not decided upstream.

A hole found while building a wireframe is not patched in the wireframe. It is fixed in the architecture, then rendered again. That single rule is why the visual stage is fast: by the time colour lands, there is nothing left to decide except how it should feel.

  1. 01Foundation researchCompetitors, benchmark, funnel model, UX patterns, the riskiest assumption named out loud.Synthesis
  2. 02People and jobsPersonas built from evidence, jobs scored on frequency, intensity and willingness to pay.JTBD matrix
  3. 03Journey, as-is and to-beThe honest current journey with its emotional low point, then the path that inverts it.CJM
  4. 04Information architectureEntities, flows, sitemap, then a per-page spec with blocks, states and SEO before any layout.Node specs
  5. 05WireframesThe whole product as a grey clickable prototype. Every state is its own page, not a note.Prototype
  6. 06VoiceTone as rules with examples and anti-examples, then a one-for-one rewrite of every line.Rulebook
  7. 07ConceptThe visual language as named taste, where every colour and form choice traces to a reference.Direction
  8. 08UI and visualColour lands on copies of the prototype. The grey files stay the structural source of truth.Screens
  9. 09Tokens and componentsValues become named tokens. Components get states, variants and rules for reuse.Kit
  10. 10Design systemThe kit becomes governed: what exists, what it is for, and what is forbidden.System
  11. 11Responsive and motionBreakpoint behaviour and motion as meaning, decided rather than inherited.Behaviour
  12. 12HandoffWhat engineering needs, in the form engineering reads, with the reasoning attached.Spec
The [?] rule

When I do not know something, I write it as [?] and carry it forward with the test that would close it. An unmarked guess is the most expensive object in a design file: it looks like a decision, it gets built like a decision, and it is only found once the product is live.

05 About Short version
Serhii Shevchenko
Experience
10+ years
Track
Senior IC
Focus
Product design + design engineering
Builds in
HTML · CSS · JS

I have been designing digital products for more than ten years. Most of that time was spent inside one large B2C platform built on complex game mechanics, retention loops and reward systems: the kind of product where changing a single progression rule moves the behaviour of the entire user base, and where you learn that a screen is never the unit of work.

That taught me to design systems and to expect every decision to be argued in numbers. What I do now is the same discipline, run in the open and end to end: take a product from the first research question through to a working interface, and write down why at every step. The case studies here are not retrospectives written after the fact. They are the actual artifacts, with the defect logs and the open questions still in them.

I work fastest with teams that want an owner rather than a supplier: someone who will argue about the business model on Monday, restructure the information architecture on Wednesday, and have it running in a browser by Friday.

I am a team player who is comfortable owning the decision. The design happens inside a team: thinking shared early, critique taken straight, the craft bar raised with the people around me rather than above them. When a call has to be made, I make it and stand behind it. This far in, the work I still want is the design itself: the research, the architecture, the interface and the code. That is why the seat I am looking for is an individual contributor one.

06 Contact

What are you building?

If you are hiring for a senior product design role, or you have a product that needs to be taken apart and rebuilt, tell me what it is and what is going wrong. A rough description is enough. I will tell you whether I am the right person for it.

Email me
Reply
Within a day
Looking for
Senior product design, IC
Availability
Open