Software house · Vitória, Brazil · serving globally
Custom software, AI consulting and dedicated developers for companies that need a system running, not a slide deck. A team of 11 developers who split the work, think through the system together and use AI as a tool, with a tech lead who approves the spec, reviews and is accountable for every delivery. Built to the bar of our tech lead, who has built for Nike, fintech and US healthtech.
What we forge
The method
We coordinate and split responsibilities, and we all think through the system together. Scope, acceptance criteria and price are fixed before the first line of code.
“A thousand days of training to develop, ten thousand days of training to polish.”
Miyamoto Musashi, The Book of Five Rings
A free conversation: the problem in your words, and your budget. If it isn't worth solving with software, we say so right there.
A 15-day, fixed-price scoping sprint that ends with fixed scope, acceptance criteria, a delivery plan and a price. If you don't proceed, the four documents are yours.
Work in short cycles, with deliveries you validate. Each milestone closes with the evidence for each acceptance criterion.
Go-live with operations documentation and metrics being read, and a 30-day warranty for defects in the delivered scope.
Results
by Kayo Souza, tech lead
Nike
Global marketing
I built the Asset Library behind 16M+ digital assets as sole engineer, and AutoCrop, a GenAI service that generates format-optimized crops and cut designers' prep time 44%, from 6.4h to 3.6h. I also automated marketing asset generation from Figma AutoLayout with correct typography.
by Kayo Souza, tech lead
Experity
Healthcare
Experity holds half of the US telemedicine market. I'm Tech Lead of the nearshore team on Care Agent, its LLM patient engagement and telehealth product. Appointment booking runs in code instead of the LLM, session telemetry keeps PHI out of every event, and the agent runtimes run under a 99.99% availability SLO with a canary every 5 minutes.
by Kayo Souza, tech lead
Yooga
Fintech · Restaurants
I led payments, with a team of 5 engineers, at a restaurant operating system with 7,000+ restaurants: Pix, Apple Pay, Google Pay and cards, a Kafka event layer, and the idempotent flows and signed webhooks that removed duplicate charges.
Track record
The squad
A lean team from Vitória, Brazil, with AI at the center of the process: the people who sell, build, and respond are the same team, with no layers between you and delivery.
Head of Security
Computer Science (UFES), then most of a decade in Canadian cybersecurity: built and ran SOC ingest processing 3+ TB of security telemetry per day for 80+ organizations, with 10+ incident-response engagements. Also the co-builder of an offline-first civic platform he still maintains, seven years on. One engineer who builds the feature and secures the infrastructure under it.
Solutions Architect · ML & Data
A statistician turned architect: time-series forecasting, production ML systems and data platforms. Architected Oráculo end to end, delivered a public-sector data platform serving 300+ municipalities leading a 6-12 engineer team, and shipped the MLOps architecture for a payment gateway. Research exchange in computer vision at Brno University of Technology.
Lead AI Engineer
Built an AI lead-scoring product from an empty repo to production as sole engineer. Developed a native Android POS to stable release in two months, and is a key player in the payment integrations (Tuna, Apple Pay, Google Pay) behind US$ 70M+ processed. Owner attitude: takes things end to end.
Designer · Lead Front-end
A designer by degree who engineers: platform team at QuintoAndar, now owner of the design system behind a merchant app serving 4,393 active stores: 841 commits of components, prototypes and product screens. The reason our work looks like product, not project.
Full-stack Engineer
Backend-focused full-stack engineer, twice dropped into stalled projects and twice took them to production: a cross-border e-commerce live in one month, a municipal accounting system in three, as tech lead. Also owns the loyalty vertical on an engine with 1.1M participating consumers. Speaks little, ships a lot.
Automation & Infrastructure Engineer
Builds the operational backbone: marketplace integrations processing 1,000+ invoices a month, WhatsApp automations where AI answers questions on its own, and Oráculo's persistence backend: 10,000+ real sessions processed in production.
DevOps & Backend Engineer
Backend and infrastructure: built the browser SDK and Go ingestion API feeding Oráculo's models (10,000+ production sessions), stood up a BI department's infrastructure from zero and led its migration to AWS: 300+ dashboards serving millions of rows with no downtime, on a full Grafana observability stack.
Developer · Web & AI
Builds client sites and AI integrations into the workflow, from briefing to launch.
Sales & Relationship
Handles prospecting, support, and client follow-up, from first contact to after-sales.
Lead Mobile
Android developer with apps in production, who has worked on teams in Brazil and Portugal. Leads the team's mobile work.
The founder
Tech Lead · AI Engineer · LLM agents & payments
8+ years in production, 4 with US clients. Tech Lead of the nearshore team on Care Agent, Experity's LLM patient agent. Before that I led the 5-engineer Yooga payments team behind US$ 70M+ processed, and built Nike's Asset Library (16M+ assets) as sole engineer. Co-founder of TOPO Contábil, where I built the architecture, engineering and security. Top 0.01% Claude Code user globally. Leading Kaizen Forge and our studio, koy.haus and Haus.
A free 30-minute assessment. Tell us what you need built: you'll leave knowing where software generates return in your company and what it takes to deliver it, deciding on evidence, not opinion.
