Adrià Casajús
Technical Lead at Proton
Barcelona, Catalonia, Spain
Summary
🤩
Rockstar🎓
Top SchoolAdrià Casajús is a Technical Lead with 13 years of experience designing and operating highly scalable, resilient distributed systems, currently leading engineering at Proton from Barcelona. He spent over a decade at CERN building DIRAC core services and workload management used by 1,000+ users across 200+ sites, and has given ~30 talks about distributed computing and software practices across Europe. Strong in back-end systems, infrastructure-as-code, and *nix operations, he blends hands-on coding (notably contributions to DIRAC and SimpleLogin back-ends) with architecture and team leadership. His background includes CTO and senior engineering roles where he delivered secure cloud integrations and automated testing hardware/software for ASICs, reflecting a practical mix of research-grade systems and product engineering. Colleagues describe him as a problem solver who thrives at the intersection of distributed middleware, operational excellence, and developer-facing tooling.
13 years of coding experience
18 years of employment as a software developer
Engineer's Degree, Computer Science, Engineer's Degree, Computer Science at Universitat Ramon Llull
Catalan, Spanish, English
Stackoverflow
131reputation
14kreached
0answers
2questions
Github Skills (19)
python10
sendmail10
send-email10
resource-management10
flask-ask10
e-mail10
grid-computing10
database-management10
workflow-management10
flask10
testing9
distributed-computing9
sql8
smtp7
smtps7
Programming languages (14)
Github contributions (5)
simple-login/app
Apr 2022 - Jan 2023
The SimpleLogin back-end and web app
Role in this project:
Back-end Developer
Back-end DeveloperContributions:569 reviews, 123 commits, 693 PRs in 9 months
Contributions summary:Adrià primarily contributed to the back-end and web app components of the SimpleLogin project. Their work focused on addressing bugs, improving code formatting, and adding tests, specifically related to process tracking and metrics. They also implemented features for saving unsent emails to disk for later resending, including related changes in the mail sender and testing modules. The user collaborated with another developer on the project, indicating strong collaboration skills.
backendsimpleloginflaskemailaliases
DIRACGrid/DIRAC
Nov 2012 - May 2015
DIRAC Grid
Role in this project:Back-end Developer
Back-end DeveloperContributions:81 commits, 8 PRs, 20 comments in 2 years 5 months
Contributions summary:Adrià primarily contributed to the back-end infrastructure and functionality of the DIRAC Grid project. Their work includes modifications to the TaskQueueDB, focusing on priority adjustments and task queue management, as well as integration of the accounting system. Furthermore, they addressed various bugs, typos, and made several optimizations across multiple components. Their contributions span across core modules and directly impact the workload management capabilities.
griddiracdistributed-computingworkflow-managementworkload-management
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