Ricardo
Mello
Backend engineer, International Speaker, and open source contributor. Helping developers unlock MongoDB in the Java & Kotlin ecosystem.
"I build things that help developers build better things."
Stack
Certifications
All certifications ↗Backend engineer with 15 years of experience, specializing in Java, Kotlin, Spring, and MongoDB. Currently working as a Senior Developer Advocate at MongoDB.
Throughout his career, Ricardo contributed to large-scale projects across logistics and banking — from improving WMS platforms for companies like Amazon to developing Kotlin-based microservices at C6 Bank. His work helped launch and scale products such as TechInvest and Pix, serving millions of users daily.
At MongoDB, he shares knowledge through technical content, conference talks, and contributions to Spring Data MongoDB, helping Java and Kotlin developers build more effective applications.
Technical writing
All articles →Real-Time Fraud Detection in Java with Kafka Streams and Vector Similarity
This content is based on a talk that my colleague Tim Kelly and I presented at DevNexus 2026 in Atlanta, one of the largest Java conferences in the world.
Discover Your Ideal Airbnb: Implementing a Spring Boot & MongoDB Search With Kotlin Sync Driver
Build an application in Kotlin that utilizes full-text search in a database containing thousands of Airbnb listings to find the perfect accommodation.
MongoDB Sharding: What to Know Before You Shard
Sharding as a horizontal scaling strategy, understanding a sharded cluster architecture, shards, config servers, mongos, and distributing data.
MongoDB 8.0 Migration Guide: What You Need to Know Before Upgrading
What's new in version 8.0, general changes, Queryable Encryption, Express query stages, query shape and query settings, compatibility and more.
Talks & conferences
All events →Aggregation Framework with Java
Hands-on workshop exploring the MongoDB Aggregation Framework with Java
MongoDB CRUD Operations in Java
Hands-on webinar exploring MongoDB CRUD operations with Java
Talk at DevStandup
Spoke on DevStandup about Vector Search and Kafka Streams
Let's
talk! ☕
Got a question, want to talk tech, or just feel like geeking out for a bit?
Go ahead and grab a time that works for you — I'll be there (with coffee, probably).
Open for speaking engagements, workshops, technical writing and content collaboration.