Otávio Costa

Senior Software Engineer · AI-native builder

I turn difficult product ideas into working systems.

I design and engineer dependable software across AI, fintech, real-time collaboration, and the architecture that keeps it all moving.

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  • Pragmatic
  • Curious
  • Reliable
  • Gets things done
Otávio Costa

Selected products

Software you can understand by using it.

See the workflow, engineering decisions, and technology behind each working product.

Abstract three-dimensional financial operating system with connected modular surfaces.

Fintech · Full-stack product

Noxvi

A multi-tenant SaaS that takes independent fitness professionals from client registration to payment collection and monthly earnings.

Capabilities
  • Become payout-ready
  • Register a client
  • Create the charge
Technology
  • React
  • Hono
  • PostgreSQL
  • Drizzle
View case study Try in Product Lab
Abstract three-dimensional event pipeline transforming financial signals into actions.

AI · Event-driven automation

Finance Concierge

An event-driven financial assistant that converts Outlook signals into deduplicated obligations, actions, forecasts, and Telegram conversations.

Capabilities
  • Read incremental signals
  • Normalize and deduplicate
  • Apply rules and reasoning
Technology
  • Node.js
  • TypeScript
  • Hono
  • Prisma
View case study Try in Product Lab
Abstract three-dimensional collaborative estimation room with synchronized cards.

Real-time · Collaborative SaaS

Scrum Poker

A real-time planning room with hidden voting, atomic reveals, live roles, round history, and a clean handoff after estimation.

Capabilities
  • Open a room
  • Synchronize participants
  • Vote without anchoring
Technology
  • React
  • Socket.IO
  • PostgreSQL
  • Drizzle
View case study Try in Product Lab

Professional experience

Systems built across enterprise, automotive, and fintech.

Each page shows the system context, technical contribution, capability flow, and the skills behind it.

Abstract three-dimensional enterprise architecture composed of connected system layers.
Enterprise software

IBM

A React-to-GraphQL enterprise stack that turns MongoDB-backed state into product workflows through modular NestJS services.

  • Product interface
  • GraphQL contract
  • Node.js
  • NestJS
Abstract three-dimensional automotive platform connecting digital product systems.
Automotive digital products

Volkswagen Digital Solutions

A React interface layer using Apollo GraphQL to compose customer workflows from independently operated automotive services.

  • Customer interaction
  • GraphQL integration
  • React
  • Apollo GraphQL
Abstract three-dimensional custom content system with reusable modular components.
Custom CMS ecosystem

Retirement Fintech Platform

A custom CMS ecosystem connecting structured content, reusable interface contracts, preview, and a retirement-fintech delivery surface.

  • Model the content
  • Define the UI contract
  • Strapi
  • Next.js
Abstract three-dimensional product team system connecting specialized engineering modules.
Embedded product teams

A.Team

Embedded engineering across distinct product systems, from composable fintech content to federated document workflows.

  • Enter the product context
  • Locate the constraint
  • React
  • Next.js
Abstract three-dimensional document processing pipeline with structured modular stages.
Document processing platform

Document Automation Platform

A federated enterprise interface that moves business documents from intake through structured processing and review.

  • Receive the document
  • Load the capability
  • React
  • Vite
Abstract three-dimensional savings platform connecting wallets payments and branded journeys.
Consumer fintech

Accrue Savings

Consumer fintech across web and mobile, connecting savings behavior, branded journeys, and the path to purchase.

  • Enter a branded journey
  • Define the savings intent
  • React
  • Next.js

Go deeper

Choose how you want to inspect the work.

Interactive mode

Product Lab

Use the product interfaces, trigger their core flows, then inspect the engineering decisions behind them.

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Skill Spatial Map

Pick an area and a specific skill to find every project or professional system that proves it.

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A useful conversation starts here

Have a difficult product problem?

If you need someone who can move between product decisions, system boundaries, and working code, message me.

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