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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>petur subev — product engineer</title>
<meta
name="description"
content="Staff-level product engineer, 15 years shipping product in startups and small teams. Frontend-deep, full-stack current. Builds his own tools: neovim plugins, an offline audiobook studio, a star-ranked github index. Sofia, Bulgaria."
/>
<link rel="icon" href="favicon.ico" sizes="any" />
<link rel="icon" type="image/png" href="icon.png" />
<link rel="apple-touch-icon" href="icon.png" />
<style>
:root {
--ground: #f4f6f5;
--ink: #1a241d;
--muted: #58685c;
--faint: #8a9a8e;
--line: #dde4df;
--card: #ffffff;
--t1: #0b4f1d;
--t2: #0f6b28;
--t3: #128330;
--t4: #23a044;
--t5: #4cc26b;
--t6: #8fdca4;
--field-opacity: 0.62;
--term-shadow: 0 12px 40px rgba(15, 107, 40, 0.08);
--pop-shadow: 0 14px 34px rgba(15, 107, 40, 0.18);
--pulse-0: rgba(35, 160, 68, 0);
--pulse-1: rgba(35, 160, 68, 0.16);
--glow: none;
}
html[data-theme="dark"] {
--ground: #090f0b;
--ink: #d7e6db;
--muted: #93a899;
--faint: #5e7263;
--line: #223226;
--card: #101912;
--t1: #1a7a34;
--t2: #4cc26b;
--t3: #35b357;
--t4: #3fdc69;
--t5: #6fe990;
--t6: #a5f4ba;
--field-opacity: 0.8;
--term-shadow: 0 12px 48px rgba(63, 220, 105, 0.07);
--pop-shadow: 0 14px 38px rgba(0, 0, 0, 0.55);
--pulse-0: rgba(63, 220, 105, 0);
--pulse-1: rgba(63, 220, 105, 0.2);
--glow: 0 0 8px rgba(63, 220, 105, 0.45);
}
html[data-theme="dark"] body {
color-scheme: dark;
}
html[data-theme="dark"] .term-body .prompt,
html[data-theme="dark"] h2 .prompt,
html[data-theme="dark"] footer .prompt {
text-shadow: var(--glow);
}
html[data-theme="dark"] .cursor {
box-shadow: var(--glow);
}
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
background: var(--ground);
color: var(--ink);
font-family:
ui-monospace, "SF Mono", Menlo, "Cascadia Code", Consolas, monospace;
line-height: 1.65;
font-size: 15px;
}
@media (prefers-reduced-motion: no-preference) {
html {
scroll-behavior: smooth;
}
}
a {
color: var(--t2);
}
a.ext::after {
content: "\2197";
display: inline-block;
margin-left: 3px;
font-size: 0.78em;
color: var(--t4);
text-decoration: none;
}
/* boot sequence: bare ground, then the terminal, then the chrome and
the field, then the prompt starts typing */
html.booting {
--boot-term: 240ms;
--boot-chrome: 820ms;
--boot-type: 2150ms;
}
@keyframes boot-rise {
from {
opacity: 0;
transform: translateY(10px);
}
to {
opacity: 1;
transform: none;
}
}
html.booting .term {
animation: boot-rise 640ms cubic-bezier(0.22, 1, 0.36, 1)
var(--boot-term) both;
}
@keyframes boot-fly {
from {
opacity: 0;
transform: translateX(-38px);
}
55% {
opacity: 1;
}
to {
opacity: 1;
transform: none;
}
}
html.booting nav .brand,
html.booting nav .right > a {
animation: boot-fly 220ms cubic-bezier(0.16, 1, 0.3, 1)
calc(var(--boot-chrome) + var(--i, 0) * 130ms) both;
}
html.booting nav .right > a:nth-child(1) {
--i: 1;
}
html.booting nav .right > a:nth-child(2) {
--i: 2;
}
html.booting nav .right > a:nth-child(3) {
--i: 3;
}
html.booting nav .right > a:nth-child(4) {
--i: 4;
}
html.booting nav .right > a:nth-child(5) {
--i: 5;
}
html.booting nav .right > a:nth-child(6) {
--i: 6;
}
html.booting #field {
opacity: 0;
transition: opacity 2400ms cubic-bezier(0.4, 0, 0.2, 1);
}
html.booting.field-in #field {
opacity: var(--field-opacity);
}
html.booting .wrap > *:not(.term) {
opacity: 0;
transform: translateY(12px);
transition:
opacity 620ms ease calc(var(--i, 0) * 90ms),
transform 620ms cubic-bezier(0.22, 1, 0.36, 1)
calc(var(--i, 0) * 90ms);
}
html.booting.rest-in .wrap > *:not(.term) {
opacity: 1;
transform: none;
}
#field {
position: fixed;
inset: 0;
z-index: -1;
opacity: var(--field-opacity);
}
nav {
display: flex;
justify-content: space-between;
align-items: center;
padding: 20px 24px;
gap: 8px;
}
nav .left,
nav .right {
display: flex;
gap: 8px;
flex-wrap: wrap;
}
nav a,
nav span.brand {
display: inline-block;
background: var(--card);
border: 1px solid var(--line);
color: var(--muted);
text-decoration: none;
font-size: 13px;
padding: 8px 16px;
letter-spacing: 0.04em;
}
@media (max-width: 740px) {
nav {
flex-direction: column;
align-items: stretch;
padding: 16px;
}
nav .left .brand {
display: block;
text-align: center;
}
nav .right {
display: grid;
grid-template-columns: repeat(3, 1fr);
gap: 8px;
}
nav .right a {
text-align: center;
padding: 8px 4px;
}
}
nav a svg {
vertical-align: -1.5px;
margin-right: 2px;
}
nav a:hover {
color: var(--t2);
border-color: var(--t4);
}
nav a svg.chev {
vertical-align: -2px;
margin-right: 4px;
}
.wrap {
max-width: 720px;
margin: 0 auto;
padding: 0 20px 96px;
}
/* terminal hero */
.term {
margin-top: 56px;
background: var(--card);
border: 1px solid var(--line);
box-shadow: var(--term-shadow);
}
.term-bar {
display: flex;
align-items: center;
gap: 8px;
padding: 10px 14px;
border-bottom: 1px solid var(--line);
}
.term-bar i {
width: 11px;
height: 11px;
border-radius: 50%;
display: block;
}
.term-bar i:nth-child(1) {
background: #f26d5f;
}
.term-bar i:nth-child(2) {
background: #f5bd4f;
}
.term-bar i:nth-child(3) {
background: #59c760;
}
.term-bar .title {
margin-left: 8px;
font-size: 12px;
color: var(--faint);
}
.term-body {
padding: 20px 22px 24px;
font-size: 14px;
min-height: 300px;
display: grid;
}
.term-body > .layer {
grid-area: 1 / 1;
}
/* holds the full transcript so typing fills reserved space instead of
growing the card and reflowing everything below it */
.term-body > .ghost {
visibility: hidden;
}
.term-body > .ghost .cursor {
animation: none;
}
.term-body .ln {
white-space: pre-wrap;
word-break: break-word;
}
.term-body .prompt {
color: var(--t4);
font-weight: 600;
}
.term-body .cmd {
color: var(--ink);
font-weight: 600;
}
.term-body .out {
color: var(--muted);
}
.term-body .out b,
.term-body .out a {
color: var(--ink);
}
.term-body .out a {
text-decoration-color: var(--t5);
}
.cursor {
display: inline-block;
width: 8px;
height: 16px;
vertical-align: -2px;
background: var(--t4);
animation: blink 1.1s steps(1) infinite;
}
@keyframes blink {
50% {
opacity: 0;
}
}
@media (prefers-reduced-motion: reduce) {
.cursor {
animation: none;
}
}
h2 {
font-size: 13px;
font-weight: 400;
letter-spacing: 0.06em;
color: var(--faint);
margin: 64px 0 6px;
scroll-margin-top: 20px;
}
h2 .prompt {
color: var(--t4);
font-weight: 600;
}
h2 .cmd {
color: var(--ink);
}
.rule {
border: 0;
border-top: 1px solid var(--line);
margin-bottom: 20px;
}
.card {
background: var(--card);
border: 1px solid var(--line);
margin-bottom: 12px;
}
.card:hover {
border-color: var(--t5);
}
.card > summary {
display: block;
position: relative;
list-style: none;
cursor: pointer;
padding: 20px 24px;
}
.card > summary::-webkit-details-marker {
display: none;
}
.card > summary:focus-visible {
outline: 1px solid var(--t4);
outline-offset: -3px;
}
.card .marker {
position: absolute;
left: 24px;
top: 19px;
color: var(--t4);
font-weight: 700;
transition: transform 0.16s ease;
}
.card[open] > summary {
padding-bottom: 2px;
}
.card[open] .marker {
transform: rotate(90deg);
}
/* the open-state summary padding has to unwind with the collapse; left
to [open] it snaps 2px -> 20px at the end and the card jumps back up */
.card.animating > summary {
transition: padding-bottom 380ms cubic-bezier(0.22, 1, 0.36, 1);
}
.card.shut > summary {
padding-bottom: 20px;
}
.card.shut .marker {
transform: none;
}
@media (prefers-reduced-motion: reduce) {
.card .marker {
transition: none;
}
}
.card h3 {
font-size: 16px;
font-weight: 600;
padding-left: 22px;
}
.card h3 a {
color: var(--ink);
text-decoration-color: var(--t5);
text-underline-offset: 3px;
}
.card h3 a:hover {
color: var(--t2);
}
.card .meta {
display: block;
font-size: 12.5px;
color: var(--faint);
margin-top: 1px;
padding-left: 22px;
}
.card-body {
padding: 12px 24px 22px;
}
/* the body keeps its padding; this wrapper has none, so it can collapse
to a true zero that a padded border-box never could */
.card-clip {
overflow: hidden;
}
.card.animating > .card-clip {
transition: height 380ms cubic-bezier(0.22, 1, 0.36, 1);
}
.card p {
font-size: 14px;
color: var(--muted);
max-width: 64ch;
}
.card p b {
color: var(--ink);
font-weight: 600;
}
.stack {
margin-top: 14px;
display: flex;
flex-wrap: wrap;
gap: 6px;
}
.stack span {
font-size: 11px;
padding: 3px 9px;
color: var(--t2);
background: var(--ground);
border: 1px solid var(--line);
}
/* project stories — buzz in when you ask why */
.proj {
position: relative;
margin-bottom: 12px;
}
.proj > .card {
margin-bottom: 0;
}
.proj.on {
z-index: 30;
}
.proj.on > .card {
border-color: var(--t4);
}
.proj > .card > summary {
padding-right: 76px;
}
.why {
position: absolute;
top: 17px;
right: 18px;
z-index: 2;
font: inherit;
font-size: 11px;
letter-spacing: 0.06em;
padding: 3px 10px;
cursor: pointer;
color: var(--faint);
background: var(--card);
border: 1px solid var(--line);
animation: why-pulse 2.6s ease-in-out infinite;
}
.why:hover {
color: var(--t4);
border-color: var(--t4);
animation: chip-buzz 0.18s steps(2) 2;
}
.why:focus-visible {
outline: 1px solid var(--t4);
outline-offset: 2px;
}
.proj.on .why {
color: var(--t4);
border-color: var(--t4);
animation: none;
}
@keyframes why-pulse {
0%,
100% {
box-shadow: 0 0 0 0 var(--pulse-0);
}
50% {
box-shadow: 0 0 0 4px var(--pulse-1);
color: var(--t4);
border-color: var(--t4);
}
}
@keyframes chip-buzz {
0%,
100% {
transform: translate(0, 0);
}
20% {
transform: translate(-1px, 1px);
}
45% {
transform: translate(1px, -1px);
}
70% {
transform: translate(-1px, 0);
}
}
.pop {
overflow: hidden;
max-height: 0;
margin-top: 0;
opacity: 0;
visibility: hidden;
transition:
max-height 460ms cubic-bezier(0.22, 1, 0.36, 1),
margin-top 460ms cubic-bezier(0.22, 1, 0.36, 1),
opacity 240ms ease,
visibility 0s linear 460ms;
}
.proj.on .pop {
margin-top: 10px;
opacity: 1;
visibility: visible;
transition:
max-height 460ms cubic-bezier(0.22, 1, 0.36, 1),
margin-top 460ms cubic-bezier(0.22, 1, 0.36, 1),
opacity 320ms ease 60ms,
visibility 0s;
}
.pop-in {
position: relative;
display: block;
scroll-margin: 24px;
background: var(--card);
border: 1px solid var(--t4);
box-shadow: var(--pop-shadow);
padding: 16px 20px 18px;
}
.pop-close {
position: absolute;
top: 8px;
right: 10px;
font: inherit;
font-size: 14px;
line-height: 1;
padding: 4px 6px;
cursor: pointer;
color: var(--faint);
background: none;
border: 0;
}
.pop-close:hover {
color: var(--t4);
}
.pop h4 {
font-size: 12.5px;
font-weight: 600;
letter-spacing: 0.06em;
color: var(--t3);
margin-bottom: 8px;
}
.pop h4 .hash {
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.links {
margin-top: 14px;
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flex-wrap: wrap;
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.links a {
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border-color: var(--t4);
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.community {
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font-size: 14px;
max-width: 64ch;
}
footer {
margin-top: 72px;
font-size: 13px;
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footer .prompt {
color: var(--t4);
font-weight: 600;
}
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<div class="left"><span class="brand">~/subev</span></div>
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<div class="wrap">
<section class="term" aria-label="About Petur Subev">
<div class="term-bar">
<i></i><i></i><i></i><span class="title">petur@sofia — zsh</span>
</div>
<div class="term-body" id="termBody"></div>
</section>
<h2 id="work">
<span class="prompt">~ $</span> <span class="cmd">ls work/</span>
</h2>
<hr class="rule" />
<details class="card" open>
<summary>
<span class="marker" aria-hidden="true">❯</span>
<h3>
<a
href="https://jest.com"
class="ext"
target="_blank"
rel="noopener"
>jest.com</a
>
</h3>
<span class="meta">senior full-stack engineer · 2025 – present</span>
</summary>
<div class="card-body">
<p>
A consumer platform for mobile web games. I turn designs into the
living product — everything you see and tap there, plus the backend
behind it: the
<b>real-time chat system</b> (tRPC subscriptions over SSE, cursor
pagination, presence), <b>unified Stripe checkout</b> on a credit-balance model,
<b>passkey auth</b>, and the PWA layer that makes a web app feel
native. 213 production PRs in the first 8 months, working
agent-first with Claude Code, kept honest with end-to-end types and
tests.
</p>
<div class="stack">
<span>react 19</span><span>ssr</span><span>fastify</span
><span>trpc</span><span>postgresql</span><span>posthog</span
><span>stripe</span><span>pwa</span>
</div>
</div>
</details>
<details class="card">
<summary>
<span class="marker" aria-hidden="true">❯</span>
<h3>
<a
href="https://powertime.org"
class="ext"
target="_blank"
rel="noopener"
>powertime.org</a
>
</h3>
<span class="meta">founding product engineer · 2025</span>
</summary>
<div class="card-body">
<p>
Real-time collaboration and group-governance platform — web app plus
an Electron desktop app for three OSes, built as the
<b>sole frontend engineer</b>. Typed WebSocket layer generated from
OpenAPI schemas; CI boots the real Clojure/Datomic backend on every
PR to typecheck the frontend against the live API contract.
</p>
<div class="stack">
<span>vue 3</span><span>typescript</span><span>pinia</span
><span>electron</span><span>websockets</span><span>openapi</span>
</div>
</div>
</details>
<details class="card">
<summary>
<span class="marker" aria-hidden="true">❯</span>
<h3>
<a
href="https://www.v7labs.com/"
class="ext"
target="_blank"
rel="noopener"
>v7 go</a
>
&
<a
href="https://www.v7darwin.com/"
class="ext"
target="_blank"
rel="noopener"
>v7 darwin</a
>
</h3>
<span class="meta">staff frontend engineer, v7 · 2022 – 2024</span>
</summary>
<div class="card-body">
<p>
On V7 Go, built the heart of the product: a
<b>Google-Sheets-like table where every cell is computed by AI</b> —
kept responsive on huge datasets by forking and customizing a
virtual scroller. Also the Entity View, a markdown editor with
mention autocomplete, and the signup/growth tooling. On Darwin,
built the consensus-review UI for multi-annotator quality control
and carried a large share of the Vue 2 → Vue 3 migration.
</p>
<div class="stack">
<span>vue 3</span><span>typescript</span><span>virtualization</span
><span>tailwind</span><span>playwright</span>
</div>
</div>
</details>
<details class="card">
<summary>
<span class="marker" aria-hidden="true">❯</span>
<h3>
<a
href="https://www.hyperscience.com/"
class="ext"
target="_blank"
rel="noopener"
>hyperscience</a
>
</h3>
<span class="meta">staff software engineer · 2021 – 2022</span>
</summary>
<div class="card-body">
<p>
An enterprise ML platform that turns documents into structured data.
I built the <b>human-in-the-loop annotation tooling</b> in React and
TypeScript — labeling rows and cells directly over scanned
documents, with live model predictions fed into the flow so
annotators corrected the machine instead of labeling from zero.
Faster and more accurate at the same time. Also grew the component
library shared across product teams and mentored the people building
on it.
</p>
<div class="stack">
<span>react</span><span>typescript</span><span>django</span
><span>ml tooling</span>
</div>
</div>
</details>
<details class="card">
<summary>
<span class="marker" aria-hidden="true">❯</span>
<h3>
<a
href="https://www.leanplum.com/"
class="ext"
target="_blank"
rel="noopener"
>leanplum</a
>
(clevertap)
</h3>
<span class="meta">staff engineer / frontend lead · 2015 – 2021</span>
</summary>
<div class="card-body">
<p>
Mobile marketing-automation platform for enterprise customers like
<b>Tinder, Tesco, and Lyft</b>. Joined as the first frontend-focused
engineer and owned the web dashboard for six years: drove two
complete migrations (jQuery/Backbone → Angular → Vue + TSX +
TypeScript) <b>without pausing feature delivery</b>, laid the
foundation of the next-generation dashboard, and crossed the stack
to rewrite the analytics module as a Spring Boot service speaking
Protocol Buffers over custom RPC. Onboarded and mentored engineers
as the frontend team formed around me.
</p>
<div class="stack">
<span>vue + tsx</span><span>angular</span><span>typescript</span
><span>vuex</span><span>spring boot</span><span>protobuf</span>
</div>
</div>
</details>
<details class="card">
<summary>
<span class="marker" aria-hidden="true">❯</span>
<h3>
where it started:
<a
href="https://www.telerik.com/kendo-ui"
class="ext"
target="_blank"
rel="noopener"
>kendo ui</a
>
</h3>
<span class="meta">software developer, telerik · 2011 – 2015</span>
</summary>
<div class="card-body">
<p>
Owning components end to end in one of the most widely used
JavaScript UI suites on the web — research, design, implementation,
tests, maintenance — plus their ASP.NET MVC server-side wrappers. I
wrote the public docs and answered developers by ticket and phone,
which is also
<b>the origin of a 20k-reputation Stack Overflow profile</b>.
Thousands of .NET developers shipped on those components.
</p>
<div class="stack">
<span>javascript</span><span>jquery</span><span>kendo ui</span
><span>asp.net mvc</span>
</div>
</div>
</details>
<h2 id="projects">
<span class="prompt">~ $</span> <span class="cmd">ls projects/</span>
</h2>
<hr class="rule" />
<div class="proj">
<details class="card" open>
<summary>
<span class="marker" aria-hidden="true">❯</span>
<h3>
<a
href="https://github.com/subev/pdf2audio"
class="ext"
target="_blank"
rel="noopener"
>pdf2audio</a
>
</h3>
<span class="meta"
>side project · open source · demo videos in the README</span
>
</summary>
<div class="card-body">
<p>
A <b>personal audiobook library you live in</b>, running fully
offline on Apple Silicon. PDFs in → chapter-marked M4B audiobooks
out, via local TTS (Kokoro and friends) with AI chapter detection
and OCR cleanup. Then the fun part:
<b>chat with your whole library</b> — an agentic assistant over
hybrid full-text + semantic search (local embeddings, ask in
English, find the Bulgarian passage) that streams answers with
<b>verified citations</b> linking straight to the page.
Per-chapter <b>translations and AI rewrites</b> (ELI5, summaries,
custom prompts) stream in token by token and get their own audio,
and synced EPUBs give you
<b>read-along with sentence-level highlighting</b> on your phone.
</p>
<div class="stack">
<span>typescript</span><span>local llms</span><span>rag</span
><span>pgvector</span><span>kokoro tts</span
><span>epub media overlays</span>
</div>
</div>
</details>
<button
type="button"
class="why"
aria-expanded="false"
aria-controls="why-pdf2audio"
>
why?
</button>
<div class="pop" id="why-pdf2audio" role="note">
<div class="pop-in">
<button type="button" class="pop-close" aria-label="Close">
✕
</button>
<h4><span class="hash">#</span> why i built it</h4>
<p>
My time at a desk is limited and I'm on the go a lot, so I keep
educating myself by <b>listening</b>. The catch: the things I
actually want in my ears — a dense PDF, a paper, a Bulgarian book
— have no audiobook and never will. Building an entire TTS studio
to avoid reading a 400-page PDF is, of course, far more work than
reading it — which is precisely the trade I keep making, except
now every PDF I own is an audiobook, narrated overnight, offline
and free. The same pipeline also gives me a
<b>daily Hacker News podcast</b>: a script pulls the day's top
stories, extracts the articles, keeps the comment-section drama to
a strict 20% of the airtime, and it's on my phone by the time I'm
out the door.
</p>
<div class="links">
<a
href="https://youtu.be/fmIiWdthnfg"
class="ext"
target="_blank"
rel="noopener"
>demo: the api & the hn podcast</a
>
</div>
</div>
</div>
</div>