Software - Software, built end to end.
From data model to revenue: we design, build, and ship whole products — for the FSK portfolio, for cloud and data marketplaces, and for the ventures our partners run under license. fsk.tax is the proof: a full product company, built here.
Proof beats promise.
Most firms show slides. We show shipped products with revenue — and bring the same engineering to everything we build and license. AI-native by default, with humans confirming what matters.
- Whole-product engineering. Discovery, data model, product, and billing — built as one thing, by the team that has done it for its own products.
- AI-native by default. Agents, generative interfaces, and AI in the workflow from the first commit — with the fixed rule: AI proposes, humans confirm.
- Cloud & data marketplaces. Apps, templates, and agents shipped through the Microsoft Marketplace, and data products for cloud data marketplaces — where the purchase draws down the client’s cloud commitment.
- Agents in production. Not chatbots — production agents wired into your systems, with approval gates on every action that has consequences.
- Platforms for partner ventures. When a partner venture needs software nobody sells, we build it into the platform they license — dedicated roadmap, compounding IP.
- From metering to product. The platform measures how it is used and what it enables. Recurring work the metering reveals becomes software we ship — that is how our own portfolio was born.
AI inside
FSK builds with AI in the loop — agentic coding, automated review, continuous test generation — and ships AI inside the product: assistants, agents, and generative interfaces with human approval where money or compliance is at stake.
Under the Hood - The stack.
Portfolio
Shipped and shipping
- fsk.tax — Brazilian tax intelligence — full fiscal stack, AI assistant, consumption billing. Built here; independent today.
- Legal OS 365 — Microsoft 365 as the law firm’s operating system — in construction with a founding firm.
- fsk.marketing — Conversational Google Ads platform — the chat is the product. In construction.
Stack
What we build in
- TypeScript first — .NET where the platform requires it; your stack when we build for you — no rip-and-replace
- Cloud-agnostic — AWS, Azure, GCP, or wherever you run
- AI in the SDLC — Agentic coding and automated review wired into delivery — speed without dropping the quality bar
Human expertise
The team
- Product engineers — Seniors who have shipped whole products — data model to billing
- Design & discovery — AS-IS / TO-BE, user stories, acceptance criteria — so the build is provably the right build
- Delivery coordination — One accountable point between you, the delivery team, and the outcome
Talk to FSK.
Our offices
- São Paulo
JK Iguatemi
Av. Pres. Juscelino Kubitschek, 2041
Vila Olímpia, São Paulo - SP, 04543-011
Brazil - Campinas
Shopping Galleria - Plaza, Térreo
Av. José Bonifácio Coutinho Nogueira, 150
Jardim Madalena, Campinas - SP, 13091-611
Brazil - Barueri
Castelo Branco Office Park - Jacarandá
Av. Marcos Penteado de Ulhoa Rodrigues, 939
Tamboré, Barueri, 06460-040
Brazil