Cristianย Rosu
Senior Java Consultant at Haiilo
Romania
Summary
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Top SchoolCristian Rosu is a Senior Java/Kotlin consultant with 10+ years designing and shipping backend-first systems, from prototyping to production, with deep expertise in Spring Boot, microservices, event-driven design and cloud-native deployments. He has led large gateway projects at Upwork handling hundreds of millions of daily requests and helped split and optimize monoliths at Gorillasโshipping a caching solution that halved initial load times and integrating recommendation pipelines with data science teams. A pragmatic architect and full-stack contributor, he also implements frontend features (Angular/Vue) and CI/CD/DevOps automation across AWS/GCP/Azure and Kubernetes. He co-founded a startup that built a highly accurate automated KYC system using OCR and face recognition, and has contributed practical Spring Boot improvements and PDF/templating work to Baeldung-backed open-source tutorials. Based in Romania, Cristian blends hands-on coding, technical leadership and product-focused delivery, often bridging teams to make complex integrations business-ready.
10 years of coding experience
10 years of employment as a software developer
Engineer's Degree, Computer Science, Engineer's Degree, Computer Science at University of BucharestHigh School, Programming and Mathematics, High School, Programming and Mathematics at Colegiul National Elena Cuza
English, Romanian
Github Skills (8)
pdf-generation10
javas10
thymeleaf10
java10
yaml10
spring-boot10
testing9
rest-api8
Programming languages (2)
Github contributions (5)
eugenp/tutorials
Feb 2020 - Jun 2020
Getting Started with Spring Boot 3:
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:15 commits in 4 months
Contributions summary:Cristian primarily contributed to the `tutorials` repository by addressing various code improvements and fixes across multiple modules. Their work included refactoring YAML parsing functionalities, merging upstream changes, and enhancing a Spring Boot-based application. Furthermore, the user developed PDF generation capabilities using Thymeleaf templates, showcasing skills in templating and PDF manipulation. Additionally, they integrated Spring properties to inject data from a configuration file into application components.
spring-bootspring-security-oauthsecurityauthenticationsecurity-oauth
cristirosu/Test
Apr 2016 - May 2016
Contributions:31 pushes, 1 branch in 3 days
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