niko • why
I design products.
And build them too.
13+ years of it. Most recently led Growth and Apps design at Harvest. Now shipping independently, with AI doing real work.

with help from Claude
2024–2025
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Turning trials into paying teams
Onboarding rebuilt around the actions that predict conversion. Activation went from 6.6% to 25.2%.
Growth
Activation
UX research
Experimentation
B2B SaaS
Web
2025
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Time tracking that remembers for you
Auto-tracking for the desktop app, taken from research to a test-ready prototype.
Discovery
UX research
Prototyping
Privacy & trust
B2B SaaS
Desktop
2024
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One tap from the Home Screen
A Recent Timers widget, the most-requested mobile feature. 60% of iOS users added it.
Feature adoption
Platform constraints
Widgets
B2B SaaS
iOS
2026
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AI chat that answers in your voice
Telltwin turns a resume and case studies into an AI chat that knows you. Designed and built solo.
AI
0 → 1
Design + build
Chat UX
Solo

If you’re here, you’re probably one of three people. A recruiter sizing me up for a role. A hiring manager checking whether I’d fit the team. A designer curious about how someone else does this.
Hi to all three.
Here’s how I think and what I’m looking for, in case it’s useful: The best designers ship. Writing is a design skill. Tools change but craft doesn’t. And the strongest teams are the ones that have been together long enough to disagree well.
What I’m looking for: a senior product design role at a team that thinks similar things. The kind of place where the same people are still around five years from now.
The case studies are above. The resume is here. My email is hello@nikolaylechev.com.
Thanks for reading,
From people I’ve worked with.



teammates at Harvest
I write things. Sometimes.
2 min
read
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I shouldn’t be able to do this
I’m a designer. I can write HTML, CSS and JS half-decently, but I shouldn’t be able to do this…
1 min
read
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A good prediction isn’t a good decision
I applied for a job yesterday, and there was this really interesting question on the form. Thought I’d share it here…



