Javier Jiménez
Senior Software Engineer at Xebia
El Puerto de Santa María, Andalusia, Spain
Summary
👤
Senior🎓
Top SchoolJavier Jiménez is a Senior Software Engineer with a decade of experience building scalable, cloud-native backend systems and shaping distributed architectures using Scala, Akka, Kafka and Spark. He has driven both hands-on development and architectural strategy at companies like Tecsisa—where he helped design a domain-specific language for time-series in Scala 3—and now at Xebia, combining pragmatic engineering with functional programming practices. Javier has a strong open-source footprint in the Scala ecosystem, contributing meaningful extensions to the popular Caliban GraphQL library (including adapter improvements and collection ArgBuilders). A collaborative problem-solver and former Scrum Master, he excels at translating complex domain requirements into resilient microservices and developer tooling that boost team productivity. Based in Andalusia, he brings cross-border academic grounding from Brazil and Spain and a persistent focus on continual learning and practical innovation.
10 years of coding experience
7 years of employment as a software developer
Computer science, Computer science at Universidade Estadual de CampinasGrado en Ingeniería Informática, Grado en Ingeniería Informática at Universidad de Jaén
English, Spanish, portugés (brasil)
Github Skills (8)
graphql10
functional-programming10
wordpress-graphql10
wpgraphql10
scala10
finch9
akka-http9
http4s9
Programming languages (3)
Github contributions (5)
ghostdogpr/caliban
Mar 2020 - Feb 2021
Functional GraphQL library for Scala
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 reviews, 9 commits, 10 PRs in 11 months
Contributions summary:Javier primarily focused on extending the `caliban` library's functionality by adding features and making improvements across various adapters. Key contributions include adding the `skipValidation` parameter to several adapter implementations (Http4s, AkkaHttp, and Finch) for GraphQL requests. The user also added `ArgBuilders` for common Scala collections such as `Seq`, `Set`, and `Vector`. Furthermore, the user introduced a get variant to the Finch adapter, enhancing its flexibility.
graphql-clientfunctional-programminggraphql-librarygraphql-serverscala
javimartinez/caliban
Mar 2020 - Jan 2022
Functional GraphQL library for Scala
Contributions:79 pushes, 22 branches in 1 year 10 months
scalagraphql-librarygraphql
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