# Vladislav Kovnerov — Data Analyst & Developer

Vladislav Kovnerov is a data analyst and developer. He builds dashboards, bots, web products, and data pipelines, and works as a data analyst at HEALBE (wearables, Customer Experience: retention, churn, NPS). He is the founder of Traecta, an app that builds personalized learning roadmaps. Previously the one-person IT of a regional public hospital for about ten years, where he automated KPI analysis with Python and Airflow. A continuous learner, with certifications from Google and DataCamp.

Владислав Ковнеров — автор сайта kovnerov.com: делает для бизнеса сайты, аналитику, ботов, ИИ-автоматизации и агентные системы

Services to order, by category: web development on any stack, e-commerce, web scraping, chat and automation bots, analytics and dashboards, AI agents.

## EN catalog (international)
- [Services](https://kovnerov.com/services/): what I build for hire, by category
- [Web development](https://kovnerov.com/services/c/web/): custom websites and web apps, any stack
- [E-commerce](https://kovnerov.com/services/c/ecommerce/): online stores and product data feeds
- [Web scraping](https://kovnerov.com/services/c/scraping/): Amazon, eBay, competitor sites, scheduled
- [Bots & automation](https://kovnerov.com/services/c/bots/): Telegram, WhatsApp, Discord, Slack bots
- [Analytics & dashboards](https://kovnerov.com/services/c/analytics/): Power BI, Tableau, Metabase, Looker
- [AI agents](https://kovnerov.com/services/c/ai/): LLM bots grounded on your docs
- [Automation](https://kovnerov.com/services/c/automation/): n8n and Make workflow automation for business processes

## Work (proof)
- [Selected work](https://kovnerov.com/work/): products, automation, and analytics case studies
- [Marketplace card bot](https://kovnerov.com/work/cards-bots/): live Telegram bot, gpt-image-2 plus Gemini
- [Trial Radar](https://kovnerov.com/work/trial-radar/): free Chrome extension that finds free trials and subscriptions in Gmail, warns 7 days before a charge, and opens the cancel page in one click; all processing stays on the device (zero egress enforced by a build gate); RU version: https://kovnerov.com/ru/work/trial-radar/
- [Social → Telegram funnel bridge](https://kovnerov.com/work/funnel-bridge/): case study of a bridge page that carries clicks (and a per-post source label, ?src=… → t.me deep link) from Instagram, TikTok, or VK into a Telegram bot with an AI qualification funnel and a live dashboard showing what each post delivered; RU version: https://kovnerov.com/ru/work/funnel-bridge/ carries the stand's frozen conversion-funnel benchmark (203 bridge views to 11 leads, per-source table, full methodology and caveats, snapshot 2026-09-19)
- [Seller P&L Bot](https://kovnerov.com/work/seller-pnl/): live Telegram bot delivering a Wildberries or Ozon shop's full P&L every morning, sales, commissions, logistics with returns, storage, stock, and loss-making SKUs with per-unit economics and a what-to-check verdict; demo mode on a sandbox shop, /start returns the report instantly, own shops go through the waitlist; RU version: https://kovnerov.com/ru/work/seller-pnl/
- [Etsy Fee and Tariff Calculator](https://kovnerov.com/work/etsy-fee-calculator/): Chrome extension that shows the real profit of any Etsy listing after every 2026 fee, line by line, including the 15% Etsy fee on the DDP tariff charge that no other calculator counts; all math runs in the browser (zero egress enforced by a build gate); the same engine runs as a no-install web calculator at https://kovnerov.com/tools/etsy-tariff-calculator/; RU version: https://kovnerov.com/ru/work/etsy-fee-calculator/
- [Missed Call Text Back](https://kovnerov.com/work/mctb/): waitlist MVP for US owner-operated service businesses (HVAC, plumbing, law firms, salons, dental) that turns a missed call into an SMS conversation within seconds: one approved text-back template, AI qualification of the reply (intent, urgency, summary, suggested reply), and the dialog in the owner's web or Telegram inbox; cost gates, STOP opt-out, and a pause-not-retry policy enforced in code; free during early access, Pro $35-49/month per location; landing and waitlist at https://mctb.kovnerov.com; RU version: https://kovnerov.com/ru/work/mctb/

## Live demos (interactive proof)
- [Demos hub](https://kovnerov.com/demos/): interactive stands you can try, no signup
- [AI lead qualifier](https://labs.kovnerov.com/ai/): free-text question in, model-parsed topic, urgency, readiness, and a draft reply for the manager
- [Social → Telegram funnel bridge stand](https://labs.kovnerov.com/funnel/): a live run of the same chain — open the bridge page, press the button, answer the bot, and your pass appears on the dashboard with its source label within seconds
- [Telegram leads into a CRM](https://labs.kovnerov.com/crm/): a client messages the bot, the lead lands in the funnel; in production it files into amoCRM, Bitrix24, or a Google Sheet
- [Telegram shop with payments](https://labs.kovnerov.com/shop/): catalog, cart, YooKassa checkout, seller notifications, live stock
- [Daily WB/Ozon seller P&L report](https://labs.kovnerov.com/report/): unit economics per SKU delivered to Telegram every morning
- [Landing samples](https://labs.kovnerov.com/barbershop/): fictional-business landing pages showing craft (barbershop, and a dental clinic at https://labs.kovnerov.com/clinic/)

## Free tools (no install, on this site)
- [Etsy Tariff Calculator](https://kovnerov.com/tools/etsy-tariff-calculator/): free calculator of every 2026 Etsy fee on one listing, line by line, including the DDP tariff charge and the 15% Etsy fee on it that no other calculator counts; the same engine as the Chrome extension, editable price, tariff rate, costs, and Offsite Ads; all math runs in the browser and nothing typed is sent anywhere; fee rates checked 29 August 2026; EN only
- [DDP Calculator](https://kovnerov.com/tools/ddp-calculator/): free DDP calculator for Etsy orders: the customs duty reverse-computed inside your price, every Etsy fee on it including the 15% on the tariff charge, the landed cost per order and who pays which dollar, buyer, seller, customs or Etsy; same engine as the tariff calculator; all math in the browser; EN only

## Live tool statistics (own data)
- [Tool stats](https://kovnerov.com/stats/): live usage numbers for my own tools, snapshot-dated: Etsy Fee and Tariff Calculator installs and listing funnel, Trial Radar weekly users with a same-window census of the trial-reminder niche, plus full methodology; EN only

## Blog (how-to guides, EN and RU)
- [Writing](https://kovnerov.com/writing/): all posts
- [How to make product cards for Wildberries and Ozon](https://kovnerov.com/writing/kak-sdelat-kartochki-marketpleysov/): cover photo, infographic, title, description, specs, step by step; RU version: https://kovnerov.com/ru/writing/kak-sdelat-kartochki-marketpleysov/
- [Бесплатные инструменты для карточек маркетплейса](https://kovnerov.com/ru/writing/besplatnye-instrumenty-kartochki-marketpleysov/): free tiers of the WB/Ozon seller cabinets, Шедеврум and Kandinsky image generators, Canva/Photopea/WBCard editors; RU only
- [Migrating a Telegram bot to MAX](https://kovnerov.com/writing/perenos-telegram-bota-v-max/): what ports over unchanged, Bot API and payment changes, the verified legal entity rule, moving the audience, timelines; RU version: https://kovnerov.com/ru/writing/perenos-telegram-bota-v-max/
- [Нейросеть для обработки фото для маркетплейсов](https://kovnerov.com/ru/writing/kak-obrabotat-foto-dlya-kartochek/): phone-shot product photo to a marketplace card with AI, background removal, light and color, studio backdrop, infographic slides, step by step; RU only
- [Парсер Telegram-каналов](https://kovnerov.com/ru/writing/parser-telegram-kanalov/): how a Telegram channel parser works, what you can collect, posts, subscribers, public chat messages, export formats, the public-data boundary per Telegram terms, price; RU only
- [Нейросеть для генерации карточек для маркетплейсов](https://kovnerov.com/ru/writing/nejroset-dlya-generacii-kartochek/): generating a whole marketplace card from one product photo with a neural net, studio backdrop, infographic slides, title and description, what to check by hand, mistakes; RU only
- [Легален ли парсинг](https://kovnerov.com/ru/writing/legalen-li-parsing/): the public-data boundary, what the Telegram content-licensing terms and the Avito/WB/VK user agreements say, hard red lines, business risks, what to fix with the vendor before ordering; RU only
- [Etsy Fees in 2026](https://kovnerov.com/writing/etsy-komissii-2026/): every 2026 Etsy fee line by line, transaction 6.5%, processing, listing, Offsite Ads, the DDP tariff charge and the 15% fee on it, why forums quote 30 to 35 percent, the Zonos estimate gap, a worked $30 example, links the live calculator and its case study; RU version: https://kovnerov.com/ru/writing/etsy-komissii-2026/
- [Мостик из рилса в Telegram](https://kovnerov.com/ru/writing/mostik-iz-rilsa-v-telegram/): why t.me links stopped opening from Instagram, how a bridge page carries the source label into the Telegram bot, Taplink and bot-platform limits, a per-post subscriber report, a live demo measurement; RU only
- [Ошибка парсинга цены: причины и что делать](https://kovnerov.com/ru/writing/kak-ustroen-parsing-cen-konkurentov/): why the parser misses or garbles the price, layout change, anti-bot, script-rendered price, cache, how to fix each and how garbage is kept out of the table; plus how a competitor price parser works, the five blocks, one collection cycle, one-off export vs scheduled monitoring, anti-blocking hygiene, ordering mistakes; RU only
- [Missed call text back](https://kovnerov.com/writing/missed-call-text-back/): how the missed-call auto-text automation works, forwarding, one approved template, AI qualification, the owner inbox, the US carrier registration and STOP rules, 2026 pricing, standalone tools vs bundles; EN only
- [Парсинг Wildberries: что можно и что нельзя](https://kovnerov.com/ru/writing/parsing-wildberries-pravila/): what the WB user agreement and robots.txt actually allow, the antibot perimeter, what closed in September 2025 (exact stock above 100 units, ad bids), the Russian legal frame and the VK vs Double Data case, official API vs parser, common mistakes; RU only
- [Парсинг Amazon: как собирать цены, отзывы и Buy Box](https://kovnerov.com/ru/writing/kak-parseat-amazon/): collecting Amazon product data by ASIN list, prices, stock, reviews, seller offers, Buy Box ownership and monitoring alerts, the official Creators API vs a market dataset, the August 2026 Conditions of Use clause and robots.txt nuance, red lines; RU only
- [Парсинг Ozon: что можно собирать и как](https://kovnerov.com/ru/writing/parsing-ozon-chto-mozhno-sobirat/): what the Ozon robots.txt and site rules actually allow, the antibot perimeter at the entrance, what is public without login (prices, specs, reviews, seller cards, categories), the rounded stock indicator vs exact own-item stock via Seller API, the Russian legal frame in brief, official Seller API vs storefront parser, common mistakes; RU only
- [Ошибки при переносе бота в MAX: чек-лист миграции](https://kovnerov.com/ru/writing/oshibki-perenosa-bota-v-max/): what actually breaks when moving a Telegram bot to MAX, the transport layer with HTTPS-only webhooks since May 2026, inline_keyboard limits, payments rebuilt for СБП, the verified RF legal entity rule, audience re-seating, the 8-mistake migration checklist and API churn like the members endpoint removal; RU only
- [Как построить дашборд для бизнеса: шаги и ошибки](https://kovnerov.com/ru/writing/kak-postroit-dashbord-analitika/): dashboard vs report, the five build steps from a business question to a checked panel, data sources incl. the WB/Ozon seller APIs and the Yandex Metrica export to DataLens, the DataLens free plan vs Metabase and Superset vs Power BI in Russia, the five mistakes, the DataLens build-to-order anchor; RU only
- [Требования Wildberries и Ozon к фото товара](https://kovnerov.com/ru/writing/trebovaniya-wb-ozon-k-foto/): WB photo specs from the official seller instructions, 700×900 px minimum, JPG/PNG/WEBP, up to 30 photos and 10 MB, the ranking hits for marketing text and bright backgrounds, the Ozon vertical 3×4 switch with the 900×1200 target and white bands on squares, where neural generation fits, the AI-generated-text pitfall; RU only
- [Etsy Tariffs in 2026](https://kovnerov.com/writing/etsy-tariff-calculator-guide/): what the July 9 DDP rule means for sellers and buyers, how the tariff hides inside the price as the rate over (1 plus the rate), the reported 15% Etsy fee on the tariff money, a worked $130 order line by line, HTS rates by category and origin, pricing mistakes; EN only
- [Etsy Fee Calculator](https://kovnerov.com/writing/etsy-fee-calculator-guide/): how to compute real 2026 profit, the six fee lines including the DDP tariff charge and Etsy's 15% fee on it, the six inputs, a worked $65 order, ads and rate-0 scenario runs, where calculators lie; EN only

- [Парсер ВКонтакте: как собирать товары и цены](https://kovnerov.com/ru/writing/parser-vk-tovary/): collecting VK community market items through the official API, market.get with up to 200 items per request, prices in kopecks, stock and photos in one response, rate limits by token type 3 to 60 rps, what the site rules ban about scripts, dated snapshots for price history; RU only
- [Пропущенные звонки: как бот в Telegram возвращает клиентов](https://kovnerov.com/ru/writing/propushchennye-zvonki-bot-telegram/): a missed call turned into a chat in seconds, forwarding by rule on the existing number, one approved template, AI qualification of the reply, the owner inbox in web and Telegram, STOP and spend guardrails, the US case and what changes for the Russian market; RU only
- [Etsy Fee Calculator Extension for Chrome](https://kovnerov.com/writing/etsy-fee-calculator-extension/): what the Chrome extension shows under the price of any Etsy listing, the popover with editable inputs and the currency rules, install steps with the single storage permission, zero network calls by build test, the first-listing-free tier and Pro at $3 a month, four checks before trusting any fee extension; EN only
- [Что такое парсинг данных](https://kovnerov.com/ru/writing/chto-takoe-parsing-dannyh/): a definition-first intro to data parsing, what counts as open pages, the three parser parts, the five-step collection cycle with Scrapy and Selenium, scheduled monitoring with price history and threshold alerts, why business needs it, competitor prices to public Telegram channels, the red lines and the Russian legal frame with WB and Ozon robots.txt examples, parser vs official API, common misconceptions; RU only
- [Is Web Scraping Legal in 2026? Rules by Method and Data Type](https://kovnerov.com/writing/is-web-scraping-legal/): legality by method (public pages, behind a login, platform-restricted bulk collection) and by data type (business facts, personal data, creative content), the three documents of different force (law, terms of use, robots.txt), the Amazon and Telegram rules quoted from the live documents, red lines that hold in every project, not legal advice; EN only
- [Amazon Scraping: What the Rules Actually Allow](https://kovnerov.com/writing/amazon-scraping-rules/): what amazon.com robots.txt leaves open (product pages under /dp/) and what it closes (offer lists, wishlists, availability pages, review feeds), the August 2026 Conditions of Use clause against data mining quoted verbatim, enforcement as captcha and IP and account blocks, the deprecated Product Advertising API 5.0 versus the Creators API and its affiliate-catalog boundary, the six-point compliant-run checklist, common mistakes; EN only

## About & contact
- [About](https://kovnerov.com/about/): background, path, tools, and credentials
- [Contact](https://kovnerov.com/contact/): start a project

## Russian version (Russia-specific catalog)
Полная русская версия с предложениями под российский рынок (Wildberries, Ozon, Авито, Yandex DataLens): https://kovnerov.com/ru/services/
Живые демо-стенды (заявки из Telegram в CRM, магазин в Telegram с оплатой, утренний отчёт селлеру WB и Ozon): https://kovnerov.com/ru/demos/
Все страницы существуют в двух локалях: английская без префикса, русская под /ru/.

Email: hello@kovnerov.com
GitHub: https://github.com/DragonSigh
Kaggle: https://www.kaggle.com/vladkovnerov