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The software your operation runs on, shipped in weeks.

I'm Felipe Bianchini, a software engineer in Brazil. I build custom systems where payments, hardware and AI sit on the critical path: card terminals, IoT controllers, WhatsApp support with AI, operations dashboards. You follow every stage live, and the code and IP are 100% yours.

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The first call is free. Written proposal within 48 hours.

WhatsApp inbox with AI replies and a conversation waiting for the team to take over
CRM with AIFood service · commercial operationsSee the case
Site connection map: cloud, Wi-Fi router, three ESP32 controllers and six taps with status
Chopp Self-ServiceBars and events · draft-beer self-serviceSee the case
G2G admin panel with an order in escrow, seller/platform split and ledger entries
G2G MarketplacePaymentsSee the case
Farm map with six poultry houses, latest sensor readings and a critical alert on House 03
GranjaTechIntegrationsSee the case
Order #6AB6A913 with a live service map from the API gateway to notifications
Pedidos OnlineIntegrationsSee the case
Participant in Figure Arrangement: four shuffled scenes, one being dragged, item 3 of 11
Neuro TestsSaaSSee the case

Systems in production. Three of them, opened up.

Payments, hardware or customer support on the critical path. The screens of each system, and the flow it runs in production today.

CRM with AI

Client: Planet PizzaFood service · commercial operationsIn production

WhatsApp inbox with AI replies and a conversation waiting for the team to take over
The problem
The commercial operation lived across spreadsheets, personal WhatsApp and team memory. Leads went cold without follow-up, campaigns had no tracking, and nobody knew which stage each client was in.
What I built
A custom CRM, built on top of the real operation: a staged pipeline, tasks and follow-ups, campaigns with idempotent import, official WhatsApp Cloud API support, and an AI layer that answers only from confirmed menu data and hands the conversation to the team whenever it is unsure.
Result
Every commercial conversation now happens in one place, with history, an AI-to-human handoff queue and message-level traceability. Redis queues keep campaigns and imports from taking down support.

How it works

  1. WhatsApp message
  2. BullMQ job
  3. AI checks confirmed data
  4. Replies or hands off to the team
  5. History and audit trail

Lavei Mais

Self-service laundry · in-person paymentsIn production

Home screen of the Lavei Mais POS app
The problem
A self-service laundry needed to run without an operator: the customer arrives, pays, and the machine unlocks. Without that, every payment depended on someone on site to check and start the equipment.
What I built
An Android kiosk app for Sunmi P2-B terminals, integrated with the Stone SDK. The flow summarizes the machine and amount, takes card or PIX on the terminal itself, confirms the transaction and unlocks the equipment automatically.
Result
The store runs without an attendant. Payment, confirmation and unlock became a single flow on the terminal, with failure handling designed for continuous use at the physical point.

How it works

  1. Customer picks a machine
  2. Card or PIX on Stone
  3. Payment confirmed
  4. Machine unlocks

Chopp Self-Service

Bars and events · draft-beer self-serviceIn production

Site connection map: cloud, Wi-Fi router, three ESP32 controllers and six taps with status
The problem
Self-service beer points need something hard: charge exactly what was poured and unlock the tap only for whoever paid, with physical hardware in the middle and several units spread out.
What I built
A complete platform: an operational web app, a NestJS API, payment integration and a C++ controller running on ESP32 that talks to the tap over MQTT. Payment creates a token, the token authorizes the hardware, consumption comes back in real time.
Result
The partner follows poured volume, sessions, commissions and payouts per site in a single dashboard. An offline controller or a low keg shows up before it becomes a problem at the counter.

How it works

  1. Payment approved
  2. Release token
  3. ESP32 over MQTT
  4. Tap unlocks
  5. Telemetry on the dashboard

7 more projects

Hover a row to preview its main screen.

See all work
  1. 01Bianchini StatusPublic project-tracking portal with a state engine, history and live updates.SaaS
  2. 02CalmWithMeEmotional-support SaaS with AI, subscriptions, consent and dashboards for users and professionals.AI
  3. 03Central JurídicaMulti-tenant legal platform with guided content, training and private document generation.SaaS
  4. 04Neuro TestsPlatform for digital neuropsychological tests, with an admin panel and continuous sync.SaaS
  5. 05G2G MarketplaceGamer marketplace with PIX checkout, wallet, split payment, escrow and controlled settlement.Payments
  6. 06Pedidos OnlineDistributed order system with Go microservices, RabbitMQ queues and SQL plus NoSQL databases.Integrations
  7. 07GranjaTechPoultry-management SaaS with dashboards, inventory, audit and IoT sensors publishing over MQTT.Integrations

On this page: 10 projects. Delivered on 99Freelas: 91.

Landing page showcase.

Landing pages I built for six niches: a clinic, an online course, a SaaS product, a restaurant, a real estate launch and solar energy. All live, responsive and ready to become yours.

Open any of them on your phone or computer.

Hover to scroll the page

What I build.

Five kinds of work I have shipped. Most projects cross two or more.

  • Payments and money flows

    Stripe Billing, card checkout, PIX (Brazil's instant payments), Stone card terminals, wallets, split payments, escrow and idempotent ledgers.

    Running in Lavei Mais, G2G Marketplace, CalmWithMe

    • Stripe
    • PIX
    • Stone SDK
    • EFI Pix

  • Hardware and IoT

    ESP32 controllers in C++, MQTT telemetry, Sunmi POS terminals, and machines that unlock after payment.

    Running in Chopp Self-Service, GranjaTech, Lavei Mais

    • ESP32/C++
    • MQTT
    • Kotlin
    • Sunmi POS

  • AI and messaging

    Official WhatsApp Cloud API, AI that answers only from confirmed data and hands off to the team when unsure, queues for campaigns and follow-ups.

    Running in CRM with AI, CalmWithMe

    • OpenAI
    • WhatsApp Cloud API
    • BullMQ

  • SaaS and operations software

    Multi-tenant platforms, operations dashboards, client portals and distributed architectures with queues.

    Running in Central Jurídica, Bianchini Status, Pedidos Online, Neuro Tests

    • Next.js
    • NestJS
    • Laravel
    • Go
    • Elixir

  • Landing pages and websites

    Fast, responsive conversion pages wired to WhatsApp, forms and analytics, with technical SEO from day one.

    See the landing page showcase

    • Next.js
    • Astro
    • HTML/CSS

From the first call to a running system, in three steps.

A short, written process. You decide with the proposal in hand and follow everything as it happens.

  1. You describe the problem30 min

    A video call or a WhatsApp chat. You explain what needs to work and what is stuck today. No cost, no commitment.

  2. You get a written proposal48 h

    Scope, timeline, stages and a fixed price per stage in one document. You know exactly what you get and when, before you decide.

  3. First deliveryDays

    Built in stages, with every advance published on the project portal. Integrations in 3 to 7 days; full systems in 1 to 2 weeks.

Remote from Brazil, on your hours.

I work with companies in the US and Europe on the same written terms I use at home.

  • Calls in EnglishVideo calls and written updates in English, in your team's tools.
  • Invoices in USD or EURStage-based contract, paid per delivered stage, deposit at the start.
  • NDA and IP assignmentSigned before we start. Code, design and IP belong to you.
  • Reply within 24 hoursOn business days, by email, form or WhatsApp.
Time zone overlapBars: local business hours, 09:00 to 18:00
  • São PauloMe
  • New York
  • London
  • Berlin

Have a problem a system can solve? Send a message. You get a reply within 24 hours.

Write the requestWhatsApp

A public track record you can check.

Statement from my 99Freelas profile

99freelas.com.br/user/felipe-pb

Projects completed and reviewed
91
Average rating
5.0 across 91
Clients who recommend
90
Ranking on the platform
#5
Badge
Top Freelancer Plus

Source: public profile on 99Freelas, a Brazilian freelance marketplace, August 2026.

Check the profile

Third project done and delivered well ahead of schedule and, above all, with everything working, no bugs. Exceeded expectations.

Multi-tenant web platformPublic review on 99Freelas · Translated from Portuguese

He got involved with the project from start to finish and made a difference in the final result. A real willingness to solve problems and find the best solutions.

Restaurant SaaS ecosystemPublic review on 99Freelas · Translated from Portuguese

He answered all our questions, was very patient throughout the process, and turned our ideas into something much better than we imagined.

Nexclass institutional websitePublic review on 99Freelas · Translated from Portuguese

You watch the project move, without having to ask.

Every client gets their own portal with progress, completed stages, deliveries and next steps, updated as the work moves. I built that portal too: it is Bianchini Status.

See a real project
Public view of a project on Bianchini Status
projetos.bianchini.devlive

What every client asks before signing.

Something missing from the list? Email me or send a WhatsApp message. I reply within 24 business hours.

Ask on WhatsApp[email protected]
How much does it cost?

It depends on scope. After the first call you get a written proposal within 48 hours, with a fixed price per stage, in USD, EUR or BRL. Ongoing maintenance is optional and quoted in the same proposal.

How long does it take?

Integrations and automations: 3 to 7 days. Web systems and apps: 1 to 2 weeks. Full MVPs: from 2 weeks. The timeline is in the proposal and you follow it on the project portal.

How does payment work?

A stage-based contract with a deposit at the start. Each stage is invoiced when it is delivered, in USD, EUR or BRL.

Do you work with companies outside Brazil?

Yes. Calls in English, contracts and invoices in USD or EUR, and an NDA with IP assignment signed before we start. From UTC-3 I overlap with most of the US workday and with European afternoons.

Can you integrate payments, hardware and WhatsApp?

Yes. Stripe, PIX (Brazil's instant payments), Stone card terminals, the WhatsApp Cloud API, ESP32 controllers and MQTT sensors are part of most projects. The integration is part of the delivery.

Is the code mine?

Yes, 100%. Code, design, documentation, access and IP are transferred on delivery. You can keep working with me or with any other team.

What happens after delivery?

Fixes are included for the first 7 days. After that, new features are quoted by scope, and optional monthly maintenance covers updates, backups and monitoring.

Tell me what needs to work. You'll hear back within 24 hours.

The first call is free. If I can solve it, you get a written proposal within 48 hours. If it is not a fit, I will point you to someone who is.

Remote, from Brazil (UTC-3). Monday to Friday.
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