
B2B lab equipment, about $100k per system
POST /emailsPOST /broadcasts/segmentswebhooksI'm Leandro. At LabsCubed, my full-time job, I work next to sales on $100k technical deals and built an inbound scoring agent that runs three times a day. On the side, I ship my own products end to end.
LabsCubed is where I work full-time. Here is the company, then four problems I solved there, what I built for each, and what changed.

B2B lab equipment, about $100k per system
POST /emailsPOST /broadcasts/segmentswebhooksI built an entire design system for LabsCubed, and the tools for lead qualification.
Every website lead was triaged by hand. I audited 2,514 accounts an earlier process had scored HOT or WARM. 52% were not buyers at all.
An AI agent that verifies each inbound lead, enriches it with Apollo, reads the company's website with Firecrawl and scores it against our ICP, three times a day. It hands sales a ready-to-use brief in Slack and HubSpot. It scores from what the company's own website says, never from a vendor label.
6,539 runs. A median of 2.4 hours from form to sales brief. 0 of 124 human-confirmed fake leads were scored HOT or WARM, and 56% of inbound is filtered out before it costs sales time.
LabsCubed sent email from HubSpot, and the website ran on Webflow and Make.com. A new page took hours, and wiring forms and tracking took engineering work.
I made the internal case for Resend, won it, migrated sending, and kept HubSpot as the sales CRM. Then I connected the two, and retired Webflow and Make.com by moving the whole website to Claude and Netlify. A new page went from hours to 5 minutes.
The newsletters and event campaigns book meetings and nurture leads with materials that keep marketing and sales aligned. 22 broadcasts, 34.9k emails delivered, 55 to 63% opens on event sequences, 1 spam complaint. About $600k of $941k in new pipeline (6 of 10 deals) sits at accounts that read those emails.
Every trade show leaked pipeline: lost business cards, half-written notes, no qualification. My first tablet version captured about 10 leads on day 1, then visitors stalled at the step that sends them our materials by email.
A Lab Assessment on a tablet at the booth, in the visitor's own technical language. It runs before the machine demo, so every conversation starts from real needs. Built from scratch with Claude, Supabase and Resend in two hours. That night I cut the form down, added a business-card and badge scanner that uses the Gemini API to read each format and fills the fields from one photo, added one-tap buttons to send the material, and checked that Resend delivered every email.
Day 2 brought roughly double the leads of day 1, just from simplifying the flow. Every visitor leaves as a scored lead, and Resend sends material matched to their choices.
The dashboard showed a 50% click rate. The B2B norm is 2 to 5%.
I piped every Resend webhook event into Supabase and looked at timing. 71% of clickers clicked within 2 minutes of delivery and hit every link. Those were security scanners. I wrote a human-click filter.
431 real people at 271 companies. Sales now calls accounts that actually clicked.
Here is LabsCubed's Resend account, read the way I'd read a customer's.
I know what good inbound data looks like, and where it lies to you.
Outside my day job, now with AI, I turn ideas into products, to learn and to partner with companies in the niches I know. These four started from my own problems, or from someone close to me.
My brother is a delivery restaurant consultant in Brazil. His service could not scale without software.
I built it for him: to grow his consulting and add SaaS revenue from the restaurants he advises.
A finance app for restaurants. A photo of a receipt becomes the books.
Pay-per-lead and lead generation agencies need one place to build funnels and route leads.
I spent 15 years in agencies, building solutions that generate sales and qualified leads and winning and keeping clients. This is everything I learned.
Quiz funnels and lead routing in one tool.
At my first job in Canada I was the marketing manager for a machine I could not use myself.
I had the problem first-hand.
Users create their carvings with a simple prompt in Claude and send the files to Sienci Labs machines.
I did not know who was visiting the website I built for LabsCubed.
I wanted to improve its conversion rate and know what to build next.
Session recordings, heatmaps and funnels for any website, with a single line of code. It now runs on every project I work on.
Five projects of my own, and the emails they send.
Everything here was built entirely by me, outside my day job.

Online football manager game for Brazil
I convinced my partners to use Resend not only for onboarding, but as the tool that sells subscriptions: paywall conversion and win-back emails.
POST /events/send8 automations8 events/contacts/segmentsPOST /broadcastsscheduled_at/templatessa-east-1
Quiz funnels and lead routing SaaS I'm launching
POST /domainsPOST /domains/{id}/verifywebhook: domain.*email.receivedPOST /emails/topics
Finance app for restaurants in Brazil: a photo of a receipt becomes the books
POST /emailstemplate alias tnc-*/contacts + custom properties/segmentssa-east-1
Session recordings, heatmaps and funnels for any website, with a single line of code.
POST /events/sendevent visiflow.signed_up/contactsautomationtemplate alias visiflow-*scoped API keysUsers create their carvings with a simple prompt in Claude and send the files to Sienci Labs machines.
SMTP via Supabase AuthRetroFoot's database works out each player's stage and keeps 12 Resend segments in sync. Five player events trigger the right email: signup, no first match after 24 hours, stuck at either paywall, and 7 days away.
Also on Resend: Waterloo City FC (8 form confirmations), KW League. 94 templates in total.
LabsCubed, my full-time job, and the projects I'm building to learn about AI, product development and sales strategies. Click one to see it in full.
I sit between the product and the customer. I can hold the technical conversation, build the thing that proves the point, and write down what I learned so the next person starts further ahead.
LabsCubed, full-time. I work next to sales on $100k technical deals and run inbound, email and the website.
15 years in agencies creating solutions that generate sales and qualified leads, responsible for winning and keeping the agency's clients.
On the side, projects I'm involved in: RetroFoot, WiseFunnel, TanoCaixa, Visiflow and CarvCAM, each built entirely by me.
Kitchener, ON · UTC-5