Joni Hahkala
Senior Java And DevOps Engineer at GRASS GmbH Bad Kreuznach
Bad Dürkheim, Rhineland-Palatinate, Germany
Summary
👤
Senior🎓
Top SchoolJoni Hahkala is a Senior Java and DevOps Engineer with 11 years of hands-on experience building secure, cloud-native backend systems and Android applications. He combines deep Java and distributed-systems expertise with practical DevOps skills—designing CI/CD pipelines and deploying microservices to Kubernetes for healthcare and enterprise platforms. His background includes research-grade work at CERN and the Helsinki Institute of Physics, where he implemented Reed-Solomon striping and Shamir secret sharing for secure distributed storage—an uncommon blend of academic cryptography and production engineering. Joni has led architecture and security for startups and products, co-founding a secure cloud storage venture and shaping API and system designs across teams. Based in Bad Dürkheim, Germany, he holds an M.Sc. in Computer Science from Aalto University and is known for simplifying legacy codebases while introducing robust, observable deployment practices.
11 years of coding experience
27 years of employment as a software developer
Master of Science (M.Sc.), Computer Science, 3.23 (Maximum 5), Master of Science (M.Sc.), Computer Science, 3.23 (Maximum 5) at Aalto University
English, Finnish, French, German, Swedish
Github Skills (20)
java9
spring9
security9
java-api9
hl78
spring-boot8
mhealth8
spring-security7
api7
hl7-fhir6
hapi-fhir6
openehr5
hapi5
sdk3
graph1
Programming languages (1)
Github contributions (5)
NUM-Forschungsdatenplattform/num-portal
Oct 2020 - Mar 2022
Contributions:6 reviews, 255 commits, 7 PRs in 1 year 4 months
jhahkala/cybercaptor-server
Feb 2016 - Mar 2021
Contributions:3 pushes, 2 branches in 5 years 1 month
cyberfiwaresecuritygraphcomputing
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