Open to opportunities

Joao Veloso

@joaoveloso

Message

I am a backend-focused software engineer with 14+ years building scalable systems and complex integrations.

Brazil

Message

What I'm looking for

I seek backend engineering or technical lead roles focused on scalable integrations, strong testing and observability, pragmatic AI-assisted development, clear specs, and opportunities to design architecture and mentor teams.

I am a backend-focused software engineer with more than 14 years designing and building systems that operate at scale across fintech, logistics, manufacturing and e-commerce. I work from requirements and interviews through design, testing and monitoring to deliver reliable systems.

I have led squads and technical initiatives, driving clear specifications, diagram-driven planning and consistent documentation to align developers, QA and PMs. I favor clean, modular patterns such as DDD and CQRS when given architectural freedom, and pragmatic reactive approaches when needed.

My work has included building payment and onboarding integrations, establishing Gherkin-based end-to-end tests, compressing high-throughput messaging to cut storage and network usage, and prototyping Debezium + NLP to streamline data onboarding. I focus on test automation, CI/CD pipelines and observability to reduce production surprises.

I value readable, well-tested code and pragmatic AI-assisted development grounded in sound software practices. I seek opportunities to design robust backend architectures, improve integration quality, and mentor teams while delivering measurable business impact.

Experience

Work history, roles, and key accomplishments

Integration Engineer

Braintrust

Apr 2025 - Jul 2025 (3 months)

Streamlined onboarding data ingestion from Ellucian, Colleague, and PeopleSoft and built end-to-end tests with Karate and Playwright; led a Debezium+NLP POC that reduced manual cleanup and accelerated processing.

Java Python Debezium Karate Playwright MySQL AWS Test Automation

Senior Software Engineer

99X

Aug 2024 - Mar 2025 (7 months)

Implemented Gherkin-based end-to-end tests with Cucumber and integrated them into Jenkins pipelines, eliminating release errors; led backend test automation across multiple Java monoliths.

Cucumber Gherkin Jenkins MySQL Docker AWS Datadog)

Senior Technical Lead

Ontop

Apr 2023 - Aug 2024 (1 year 4 months)

Led two squads to design and deliver payment and card microservices for a global hiring fintech, introducing Spring WebFlux for reactive processing and driving third-party integrations and CI/CD.

Webflux Microservices Stripe Plaid Kubernetes Gitlab CI EKS

Senior Software Engineer

Avenue Code

Jul 2022 - Mar 2023 (8 months)

Maintained microservices to sync global logistics and inventory data and reduced storage and network usage by compressing millions of daily messages, improving throughput.

Java 8 Kafka Azure Docker MongoDB Azure DevOps Microservices

Senior Software Engineer and Architect

Bees Brazil

Nov 2021 - Jul 2022 (8 months)

Designed and developed microservices using DDD/CQRS for an e-commerce platform, synced product data across distribution centers and launched an ad delivery feature with A/B testing support.

Spring Boot MongoDB PostgreSQL Kafka Terraform Helm Azure

Senior Software Developer

Dextra

Jun 2021 - Nov 2021 (5 months)

Built event-driven microservices with Apache Camel to sync card transactions and internal balances, created integration POCs, and used Dynatrace for performance monitoring.

Spring Boot Apache Camel Kafka MongoDB Dynatrace AWS Gitlab

Senior Software Developer

Cast Group

Apr 2020 - Jun 2021 (1 year 2 months)

Contributed to Brazil's PIX instant-payment microservices and modernized Central Bank systems, promoting TDD and scalable service design to support millions of users.

Java 8 11 Spring Boot Kafka AWS TDD Feign Gitlab Angular

Business Analyst and Software Developer

Embraer

Jan 2006 - Apr 2020 (14 years 3 months)

Gathered requirements and developed integrations and internal tools for manufacturing and logistics, reducing reporting delays and errors and improving visibility across SAP workflows.

SAP Java ERP Integration Process Improvement Spring Boot