# Demetrius Araujo Demetrius Araujo is a remote worker on Himalayas, Staff Software Engineer at Visa, based in Brazil. Source: https://himalayas.app/@demetriusaraujo ```text Staff Software Engineer at Visa/Pismo, improving Ledger and Flex Controls APIs with Golang and AWS. ``` | Detail | Value | | --- | --- | | Availability | Looking for a job | | Location | Brazil | | Authorized to work in | Brazil | | Salary expectations | 60k+ USD | | Job categories | Software Engineer, Backend Engineer | | Skills | Backend Development, Microservices, Scalable Systems, Performance Optimization, System Reliability, Domain Driven Design, Test Driven Development, Software Architecture, Go, NodeJS, TypeScript, AWS, Kubernetes, Docker, PostgreSQL | | LinkedIn | https://linkedin.com/in/demetrius-segundo | ## About ```text At Visa, I work on Ledger and Flex Controls APIs, enhancing core products and collaborating with the Rules squad to maintain and develop features. My work includes Golang, AWS, and PostgreSQL. At PicPay, I developed scalable solutions for a high-impact project handling millions of daily requests. Performance optimizations contributed to a 2% revenue increase, and I improved service reliability with graceful shutdown and circuit breaker patterns. At Bom Pra Crédito, I contributed to architectural design, features, and reliability improvements. I also developed end-to-end integrations and tests with Jest and Newman. Earlier, at Compasso UOL, I worked on a microservices architecture using Node.js, TypeScript, and Terraform. My experience also includes web solutions with WordPress and application development with React Native and Node.js. ``` ## Experience ### Staff Software Engineer (current) [Visa](https://himalayas.app/companies/visa). Jan 2026 - Present ```text Managed and enhanced core products for Ledger and Flex Controls APIs at Visa | Pismo, ensuring seamless functionality. Collaborated with Rules squad to maintain and develop new features, optimizing product performance. ``` Skills: Go, Kubernetes, AWS, PostgreSQL, Redis, Terraform, OpenTelemetry ### Senior Software Engineer (current) [Visa](https://himalayas.app/companies/visa). May 2024 - Present ```text Managed and enhanced core products for Ledger and Flex Controls APIs at Visa | Pismo, ensuring seamless functionality. Collaborated with Rules squad to maintain and develop new features, optimizing product performance. ``` Skills: Go, Kubernetes, AWS, PostgreSQL, Redis, Terraform, OpenTelemetry ### Senior Software Engineer Pismo. May 2024 - Feb 2025 ```text Managed and enhanced core products for Ledger and Flex Controls APIs at Visa | Pismo, ensuring seamless functionality. Collaborated with Rules squad to maintain and develop new features, optimizing product performance. ``` Skills: Go, Kubernetes, AWS, PostgreSQL, Redis, Terraform, OpenTelemetry ### Senior Software Engineer [PicPay](https://himalayas.app/companies/picpay). Apr 2024 - May 2024 ```text Led the design and development of scalable solutions for a high-impact project at PicPay, resulting in a 2% revenue increase and improved service reliability. Architected and developed new features to handle high volumes of requests efficiently. ``` Skills: Kubernetes, Docker, Go, MongoDB, PostgreSQL, MySQL, Amazon-SQS, Kafka, S3, Terraform ### Back End Developer [PicPay](https://himalayas.app/companies/picpay). Jun 2022 - Apr 2024 ```text Software developer on a high-impact project that responds to millions of requests daily. Architected and developed scalable solutions, implemented performance optimizations resulting in a 2% increase in revenue, and improved service reliability. ``` Skills: Kubernetes, Docker, Go, MongoDB, PostgreSQL, MySQL, Amazon-SQS, Kafka, S3, Terraform ### Backend Engineer Bom Pra Crédito. Oct 2021 - Jun 2022 ```text Software Engineer focused on crafting robust features, improving system reliability, and championing architectural standards. Contributed to architectural design, created new features and fixed bugs, and mentored colleagues. ``` Skills: NodeJS, TypeScript, Go, MongoDB, Serverless, Jest, Newman, Docker, Vue.Js, AngularJS ### Back End Developer Compasso UOL. Feb 2021 - Oct 2021 ```text Led the development of a comprehensive microservices architecture using Node.js, TypeScript, and Terraform. Collaborated with the project architect to design new solutions and engaged with stakeholders to gather requirements. ``` Skills: NodeJS, TypeScript, Terraform, Microservices ### Full-stack Developer PYXYS - Content Marketing e Performance. Oct 2020 - Jan 2021 ```text Development of web solutions with WordPress. ``` Skills: WordPress ### Full-stack Developer Prefeitura de Vitória da Conquista. Jun 2020 - Dec 2020 ```text Application development in React Native; bot for automatic form filling and WhatsApp bot made in NodeJS. ``` Skills: React-Native, NodeJS ### Web Development Intern Mascatis. Sep 2019 - Jul 2020 ```text Web development internship. ``` ### Estagiário de desenvolvimento de software Prefeitura de Vitória da Conquista. Apr 2019 - Jun 2020 ```text Internship in software development. ``` ## Education ### Instituto Federal da Bahia Bachelor's Degree, Sistemas de Informação. 2019 - Present ```text Pursuing a Bachelor's degree in Information Systems, with an expected completion in 2026. ``` ## Tech stack - Newman - Amazon S3 - Kubernetes - React Native - MySQL - PostgreSQL - MongoDB - Node.js - Redis - Terraform - Jest - React - Vue.js - AngularJS - Amazon SQS - OpenTelemetry - WordPress - Serverless - TypeScript - Docker - Golang - Apache Kafka - AWS To contact Demetrius, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire). ## People also viewed - [Amanda Fernandes](https://himalayas.app/@amandafernandes): Software Engineer, Ka.app - [Daniel Sousa](https://himalayas.app/@danielsousa): Senior Software Engineer, Jobsity - [italo gouveia](https://himalayas.app/@italogouveia): Software Developer, GsoftX - [Alexandre Pedrecal](https://himalayas.app/@alexandrepedrecal): Software Engineer, Consumidor Positivo - [Thales Maciel](https://himalayas.app/@thalesmaciel): Software Engineer, Syniti - [Luis Fernando](https://himalayas.app/@fernandoborg3s): Solutions Architect, HeyDev - [isac oliveira](https://himalayas.app/@isacoliveira): Backend Software Engineer, Trustly - [Sandro Uliana](https://himalayas.app/@sandrouliana): Senior Software Engineer, Overseas Network - [Artur Hamann Ronconi](https://himalayas.app/@arturhamannronconi): Desenvolvedor Backend Sênior, Trino Pagamentos - [Eduardo Fabisiak](https://himalayas.app/@eduardofabisiak): Software Engineer, Preco Local