helban.dev

Fast websites and tools. The code stays yours.

I build websites that load instantly (Google PageSpeed 97-100), Python web scrapers, Chrome MV3 extensions and automations. Every service comes with a live demo you can click.

7 live sites, PageSpeed 97-100 code you own, with tests billing via Useme / Upwork 10 years of C++ embedded

What brings you here?

Eight positions, fixed scope, and the starting price written next to each one. Narrow the list or read all of it.

  • Company website / business card most ordered

    Lean hand-coded site, PageSpeed 97-99, real technical SEO: per-page titles, structured data for Google, a sitemap. Not a page builder.

    salon.helban.dev
    from $600 Order
  • Landing with a price calculator + lead form

    One-page landing with an interactive cost calculator and a working lead form. Price shows instantly, the lead lands in your inbox.

    kalkulator.helban.dev
    from $450 Order
  • WordPress speed-up

    Lighthouse audit, render-blocking and image fixes, measured before and after on the same landing page.

    63 → 99 Perfweight −91%LCP 26,5s → 2,0s

    wp-speed.helban.dev · full study
    from $250 Order
  • Web scraper → Excel / CSV / SQL

    Data pulled from a chosen site into a clean Excel, CSV or database: deduped, normalized. The script stays with you, run it whenever you want. Handles JavaScript-heavy pages too.

    github.com/Helban/fmcsa-carrier-lead-scraper
    from $60 Order
  • Chrome extension (MV3)

    A Chrome plugin that adds new features to the pages you work on: a side panel, buttons, Gmail or API integrations, secure login. One delivered contract behind these.

    github.com/Helban/keeptouch
    from $150 Order
  • AI chatbot (WhatsApp / web) with memory

    Answers your customers' messages and remembers each conversation. Resilient by design: duplicate messages filtered out, failed sends retried automatically.

    github.com/Helban/whatsapp-ai-bot
    from $350 Order
  • Debug someone else's code (WP / PHP / Python / scraper)

    Diagnostic first: written cause and fix plan as milestone 1, the fix and test as milestone 2. No blind quoting on legacy code.

    wp-speed.helban.dev
    from $60 Order
  • Something else?

    Scrapers of any kind, n8n automations, Airtable, Stripe, KSeF for WooCommerce, WordPress builds. Describe what you need, I quote individually.

    individual quote Write to me

An order here buys nothing yet: it prefills the contact form, and the contract with payment comes later, on Useme or Upwork.

Click the proof, don't take my word

Four projects, opened up. Each one hand-coded, with no WordPress and no page builder, and each one scores 100 on accessibility, best practices and SEO, so the only number worth printing is performance.

Google PageSpeed, mobile, July 2026. Scores swing 1-2 points between runs. Click a score to measure it yourself.

63 → 99Performance
26,5s → 2,0sLCP
−91%page weight

One page, built three ways

A bloated Elementor build, the same one optimized in place, and a third version written by hand from scratch. Same page, same content, measured on Lighthouse mobile each time. The write-up says where the page-builder ceiling sits and how much speed is really recoverable.

wp-speed.helban.dev

Read the case study

The rest, without the write-up: kalkulatordropwatchaurumaethosall case studies

No payment on this site. Here's why that protects you.

Money, invoice and escrow stay on Useme (PL) or Upwork (EN). You only pay once the contract is signed there.

1

Pick a service

Click order on a package, or just write what you need. The scope and starting price come with you.

2

You get a contract

I send a Useme contract (PL) or an Upwork Direct Contract (EN) with the agreed scope and price. You accept and fund it.

3

Delivery, then release

I build and deliver. The platform holds the money in escrow and releases it only when you accept the work.

Pick a package

The one part I can't write myself

Every demo above is my own work, so of course it flatters me. These are public Upwork reviews, left by the clients who paid for the work. Open my profile and read them there.

Rated 5 out of 5 on Upwork 5.0
Working with Adam was a great experience. Communication was always clear, and he responded quickly to every question I had. He did excellent work on my website and made it easy for me to manage and update it on my own going forward. I really appreciate his professionalism and attention to detail. I would definitely hire him again and highly recommend him to anyone looking for quality web development work.
Dan M. WordPress pages, then hired again
Rated 5 out of 5 on Upwork 5.0
Adam is truly a DocuSign expert, 100% Recommend
Rohan G. DocuSign contract automation
Rated 5 out of 5 on Upwork 5.0
I'm very satisfied. Adam created a user friendly Chrome Extension saving me countless hours of work.
Catherine B. Chrome extension, Grok to Blogger
Rated 5 out of 5 on Upwork 5.0
It was a pleasure working with Adam! Great communication and timely solutions! Looking forward to partnering with him on future projects.
Andrew A. Framer and Outseta, login fix
100% Job Success 5.0 from 5 reviews 10 total jobs Check it on Upwork →
Adam K
Adam K
C++ embedded · freelancer

An embedded engineer who writes web like firmware

10 years of C++ embedded, where a wasted kilobyte and a leaked handle have consequences. I carry that habit into web work: small payloads, no dead dependencies, code that says what it does.

That is why the sites score PageSpeed 97-100, and the Python scrapers and tools come with tests. You get the source, no lock-in, no monthly rent on your own site.

10+
years of engineering
97-100
PageSpeed on the demos
11
public repos
0
page builders used
Write to me
Adam K
Adam K I reply personally, usually within a day

Tell me what you need

A short message is enough. I reply in Polish or English, async.

You're ordering:

I'll reply with a Useme or Upwork contract for the agreed scope. No payment happens on this site.

Your details go straight to my inbox and are used only to reply. Details: privacy policy.