Xavier Seguí
Software Engineer at Spacewell Energy
Santanyí, Balearic Islands, Spain
Summary
🤩
Rockstar🎓
Top SchoolXavier Seguí is a seasoned software engineer with 11+ years building resilient, evolvable systems across cloud, microservices and event-driven architectures. He combines deep backend expertise in Java and Kotlin with practical experience in systems integration, gRPC, Pub/Sub and CI/CD, recently contributing to prominent open-source projects like Gradle and web3j. Xavier has driven developer experience improvements—automation, tooling and test automation—that reduce friction and raise quality, and he pairs pragmatic engineering with clear architectural boundaries. His background spans blockchain middleware, high-load data pipelines on AWS, and long-term work in enterprise Java and distributed systems. Based in the Balearic Islands, he’s also a FOSS enthusiast and musician, a blend that hints at a methodical craftsperson who values continuous learning and collaboration.
11 years of coding experience
17 years of employment as a software developer
Postgraduate in Complexity Sciences Complexity Sciences, Postgraduate in Complexity Sciences Complexity Sciences at Iscte - Instituto Universitário de LisboaUPC Universitat Politècnica de Catalunya
Spanish, Catalan, English, French, Portuguese, Italian
Stackoverflow
164reputation
5kreached
3answers
5questions
Github Skills (24)
solidity10
groovy10
testing10
java10
javas10
web3js10
ethereum10
build-automation10
blockchain10
smart-contracts10
gradlew10
test-automation10
gradle10
rxjavafx9
kotlin9
Programming languages (12)
Github contributions (5)
LFDT-web3j/web3j
Feb 2018 - Jan 2021
Lightweight Java and Android library for integration with Ethereum clients
Role in this project:
Back-end Developer
Back-end DeveloperContributions:34 reviews, 19 commits, 28 PRs in 2 years 11 months
Contributions summary:Xavier primarily contributed to the `web3j` library, a Java library for Ethereum clients. Their work focused on enhancing the auto-generated contract classes by exposing additional behaviors for the use with `ethGetLogs` function. They modified the Solidity function wrapper by adding parameters and methods for event handling. The user also merged changes from the master branch, updated smart contract wrappers and fixed Java 6 compatibility issues, and included code related to ethLogObservable calls.
ethereumrxjavasmart-contract-toolsblockchainandroid-library
gradle/gradle
Oct 2022 - Jan 2023
Adaptable, fast automation for all
Role in this project:Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:1 release, 21 reviews, 135 commits in 3 months
Contributions summary:Xavier primarily focused on improving the build process by avoiding duplicate code and adding comprehensive unit tests to validate Java compilation and test task options. The user's contributions included refactoring validation logic, extracting common functionality into reusable methods, and adding new tests to cover potential edge cases, ensuring code quality and robustness. The user also addressed a bug related to recreating the signing task in the signing process. Additionally, the user contributed to various integration tests, specifically focused on improving and validating the build process.
pythongradlegroovyautomationjava
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