I’m Guilherme Jenner, a software engineer based in Brazil. I build AI agents, integrations and custom software for companies that want to sell more and type less — with the safety of someone who has already shipped this to production.
Guilherme Jenner · B.Sc. in Information Systems (UVV)
Remote worldwide, in English. Registered Brazilian company for B2B contracts.
I don’t sell hours of code. I deliver working systems, integrated with what your company already uses, with enterprise-grade security.
For when your team loses sales after hours or types orders by hand.
AI on WhatsApp or an internal dashboard, wired straight into your system. It answers customers, checks stock and schedules, and only saves an order after the customer confirms — with no duplicate records.
For when your numbers are stuck in spreadsheets and nobody sees where the margin is going.
A routine that reads your current system without slowing operations down and delivers a daily diagnosis on your phone or a fast dashboard. The same technology was validated with a consumer-goods multinational.
For when your internal system is slow, your cloud bill is high or you need an app of your own.
Customer and partner portals, iOS and Android apps, and optimization of existing systems so they load faster and cost less to run.
Within a few days you see a prototype running on your own data and get a proposal with fixed scope, timeline and price. If you go ahead with the project, the fee is credited.
CLO · fashion app with an AI stylist · App Store and Google Play
As co-founder and sole developer, I built the whole product: the app, the backend and the AI that analyzes each user’s clothes. The Stela assistant only changes the closet after the user confirms.
Beluga Analytics · retail intelligence
As co-founder and sole developer, I built the platform that combines sensor and sales data from retail stores and generates automated AI reports. The pilot was delivered and validated with a consumer-goods multinational.
Read the full case studyCirco Filmes · client · 2024
I built the site in Angular with a focus on speed, SEO and accessibility: HD videos only load when they scroll into view, and the content is available in more than one language.
A call or an email about what is holding your operation back and which systems you already use.
Within a few days you see a prototype running on your data and receive a proposal with fixed scope, timeline and price. The fee is credited if you go ahead.
You test each working part before the next one starts, and the system is documented and owned by you.
With a .NET middle layer that controls what the AI is allowed to do, validates every order and uses a “propose → confirm” pattern. The AI never changes data on its own: the system checks permissions, prevents duplicate orders or bookings even if the connection drops halfway, and logs every operation for auditing.
In most cases, no. The automation and reports are built on top of your current ERP or database, reading and writing to it safely without slowing operations down.
Every project gets a fixed quote with scope, timeline and price after a paid discovery with a working prototype; the discovery fee is credited if you go ahead. AI automations also have a monthly fee that covers hosting, AI usage and WhatsApp.
Yes. Guilherme Jenner works remotely from Vila Velha, Brazil (UTC−3), in advanced English or intermediate French, through his registered Brazilian company, on software development projects, performance consulting for .NET and cloud, or as an engineer embedded in your team.
