About
Marcello Oliveira
Marcello Oliveira is a Brazilian software engineer and Engineering Team Lead at Deel, where he leads AI product engineering and ships LLM features to production, from the model call to the interface. He previously built software at Amazon, Coinbase and XP Inc., and is a three-time ACM ICPC South America finalist.
Engineering Lead · AI Product Engineering. I ship AI features to production, end to end: models, APIs, and the products people use.
I lead an engineering team at Deel. We take language models from a good demo to something people trust with payroll and HR, and I care about every layer of that: the prompt and the eval, the API and the data model, and the interface that tells the truth about what the model knows.
I am full-stack for real. Node.js and TypeScript APIs on PostgreSQL at Deel; Go and Rails at Coinbase; Kotlin and AWS Lambda at Amazon; Apigee and .NET at XP Inc., where I was also the technical lead of Soma, the company’s design system, and built Arsenal and Chameleon. Before that, at Social Miner, I built URSA, a script that ran inside other people’s websites.
I spent years in competitive programming and reached the ACM ICPC South America finals three times. The habit it left: when something feels obvious, check the numbers. Most of what I write here starts that way.
“Optimizing time and space, and building for people.”
Path
- DeelApr 2025 – presentEngineering Team LeadLeads AI product engineering: LLM features in production, the APIs and the interfaces around them.React · TypeScript · Node.js · Sequelize · PostgreSQL · OpenAI API
- DeelJan 2024 – Apr 2025Senior Software EngineerFull-stack product engineering across React, Node.js and PostgreSQL.Playwright · Datadog · Sentry · LaunchDarkly
- AmazonAug 2022 – Oct 2023Software Engineer, Export & ExpansionSoftware engineer on the Export & Expansion team.Kotlin · AWS Lambda
- CoinbaseMar 2022 – Aug 2022Software Engineer, International ExpansionSoftware engineer on the International Expansion team.Go · Rails
- XP Inc.Jan 2020 – Mar 2022Software Architect and Design Ops Tech LeadTechnical lead of the Soma design system; built Arsenal (micro-frontends) and Chameleon (CSS-in-JS for web components).Apigee · .NET · Stencil · Webpack Module Federation
- Social Miner2019Software EngineerBuilt and maintained URSA, an embedded behavior script, and the Channel Builder; led a team of four..NET · React · Service Workers · IndexedDB
- UFPB · ACM ICPC2015 – 2017B.Sc. in Computer Engineering, Universidade Federal da Paraíba (UFPB). ACM ICPC South America finalist in 2015, 2016 and 2017.