22 verified channels · founder-led · building since 2019
Digital systems for brands that verify their work.
Web platforms, SEO systems, AI chatbots, lead tooling, and barcode commerce — built and maintained by one person who answers your messages.
I'm Sayad Md Bayezid Hosan. SmartGen, SmartLeadGen, Boyok, and a growing list of client work all run on systems I designed, shipped, and still maintain. Every claim on this site links to something you can open and check yourself.
Tangail, Bangladesh · working worldwide
Hi — I'm Bayezid, and I build the boring parts properly.
Most digital work fails quietly: a site nobody maintains, an SEO audit that goes stale in a quarter, a dashboard that only the agency knows how to open. I build the opposite — systems that keep running after the invoice is paid, documented well enough that you could hand them to someone else tomorrow.
That means I ship fewer, deeper things: a tools platform with 120+ utilities, a lead collector that only keeps verified data, a barcode engine that works when the shop's internet doesn't, and open-source documentation anyone can reskin. All of it is live, and all of it is linked from this page.
What you actually get — and what changes because of it.
Slide through the work. Each card names the transformation first, the deliverables second.
Built, shipped, and still running.
Developer Demo Hub
Every client-facing demo I hand over, published from one repository — admin dashboards, storefronts, documentation templates, all auto-catalogued.
Boyok Lead Collector
Collects business leads and keeps only the verified ones — scored, exportable, and built for agencies running real outreach.
Boyok Barcode SaaS
An e-commerce admin dashboard with an auto barcode machine — ready to use offline or online, and injectable into a store you already run.
SmartGen
120+ free web utilities plus a full digital-marketing curriculum, built and maintained solo — including the free SEO audit tool.
The full project list
AI chatbots, the SEO audit tool, open-source documentation, barcode services, client storefronts, and the automation queue that's shipping next.
What I learned building it, written down.
Google Maps Lead Generation to Google Sheets | NexusLeads
Discover public local-business prospects, verify contact signals, and organize leads and outreach drafts in Google Sheets with the privacy-first NexusLeads workflow.
Read the post →
smartflow-ai-case-study-and-project-journal
Written to be read cold, months from now, by you or whoever you hand this to If you forget everything else, read Quick Status and The Account Map those two sections…
Read the post →
WhatsApp Cloud API Setup Guide and Integration Costs
A complete guide comparing official WhatsApp Cloud API vs Baileys, Meta integration costs, step-by-step setup, and channel configurations.
Read the post →What it's like to work together.
Worked together? Leave a review.
Shown once approved — add a link to your photo if you'd like it to appear alongside your name.
Take something free first. Hire me second.
You shouldn't have to book a call to find out whether I'm any good. Everything below is live, free, and needs no account — use it, and decide afterwards.
The free toolkit
Four things you can use in the next ten minutes, all built and maintained here.
Tell me what you're trying to fix
Straight to me, not a queue. You'll get an honest answer about fit — including "this isn't worth paying me for" when that's the truth.
Anyone can claim a résumé.
Not everyone can link it.
Every platform I work from — PyPI, GitHub, ORCID, Stack Overflow, LinkedIn, Crunchbase — is listed and checkable in one place. No stock photos, no borrowed case studies.
See all 22 verified profiles→Common questions, answered plainly.
What do you build?
Web platforms, SEO systems, AI chatbots, lead-generation tooling, barcode commerce systems, and the marketing infrastructure that connects them. If it needs to keep running after launch, it's the kind of work I take.
Who will actually work on my project?
Me. Sayad Md Bayezid Hosan leads the strategy, the build, and the maintenance directly — there is no account manager between you and the person writing the code.
Can I try anything before hiring you?
Yes, and you should. The developer demo hub, the SEO audit tool, the barcode service, the lead collector, and the open-source documentation are all live right now.
Can barcodes be added to a store I already have?
Yes. The barcode service loads from a single script tag, so an existing e-commerce admin dashboard starts generating barcodes without a rebuild or a migration. The full Boyok dashboard is there if you'd rather have the whole system.
Do the lead tools use scraped data?
Only verified data is collected and only verified data is exported. Discovery runs against Google's own Places API rather than scraping, and anything that doesn't verify never reaches your list.
How do we start?
Send a project brief — a couple of sentences is enough. You'll get an honest answer about fit and next steps, including when the answer is that you don't need me.