Leonardo LopesTech Lead · Software Engineer & Architect
Six years of software running in production. Now I lead the team that ships it.
Tech Lead at Buildbox, leading Horizontes, the Callink super appOpen to full-time, contract and freelance · Remote from Brazil (UTC−3) or relocation
Cloud bill · Linda Lifetech · in production
−38%
Earlier results, one client at a time.
Numbers from systems I helped ship before my current role. Full role descriptions are in the experience history.
See my experience- −80%worst-case app load time2023 – 2024Took the worst-case load of the field-sales app behind about 97% of Grupo Petrópolis’ USD 4B yearly revenue from 8 minutes to 1 min 37 s.Built with React · React Native · Node.jsGrupo PetrópolisSoftware Engineer at Buildbox
- 27Brazilian states, one pricing platform2024 – 2025National pricing platform with regional tax rules for Lactalis, the largest dairy group in the world.Built with Node.js · TypeScriptLactalis GroupSoftware Engineer at Buildbox
- 0.5×the estimated delivery time2022 – 2023Shipped the internal web and mobile gamification platform for MSD Brazil with near-zero production defects.MSDSoftware Engineer at Buildbox
- 580+teaching units served2021 – 2022Go service that turns MP4 uploads into adaptive HLS streams for Poliedro, built for peak load.Built with Go · HLSPoliedroSoftware Engineer at Nkey
Before that: React Native apps for freelance clients, from 2020.
Continuous production work since June 2020.
- FreelanceJun 2020 – Jul 2021
- NkeyAug 2021 – Apr 2022
- BuildboxMay 2022 – Present
MSD · Grupo Petrópolis · Lactalis Group · Linda Lifetech · Callink
Built across the whole system.
Interfaces, services, data and the cloud they run on: tools I've used in production. Each system gets the ones it needs.
Interfaces
- React
- Next.js
- React Native
- Expo
- Tailwind CSS
- Storybook
Services
- TypeScript
- Node.js
- Go
- NestJS
- GraphQL
- Fastify
Data and messaging
- PostgreSQL
- MongoDB
- Redis
- Apache Kafka
- Prisma
- MySQL
Cloud and infrastructure
- AWS
- Google Cloud
- Azure
- Terraform
- Kubernetes
- OpenTelemetry
Hiring, or have a product to build?
I'm Leonardo Lopes, a tech lead, software engineer and architect working remotely from Brazil (UTC−3). Every channel below reaches me directly.
Send the role or the project.