Nikolaos Zisis
Android Developer
Thessaloniki, Macedonia and Thrace, Greece
Summary
👤
Senior🎓
Top SchoolNick Zisis is a Senior Member of Technical Staff with 11 years of experience designing and shipping robust backend and mobile systems, currently at Oracle in Thessaloniki. He specializes in Java, Android, and cloud-native architectures, with deep hands-on work in voice biometrics, authentication and anti-fraud systems from his tenure leading Omilia’s deepVB project. Nick has a strong track record integrating complex multi-project architectures, building CI/CD pipelines and automations with Ansible, and ensuring backward-compatible database migrations using Hibernate and Liquibase. Earlier roles include architecting mobile and data-intensive applications (Xamarin, Realm, PostgreSQL) and delivering production Android apps with real-time integrations. He combines systems-level thinking with practical implementation skills, often bridging DevOps and development to drive deployments. Fluent in both product-focused mobile work and enterprise backend engineering, he brings a rare blend of voice-security domain expertise and cross-stack execution.
12 years of coding experience
8 years of employment as a software developer
Master's degree Data Science, Master's degree Data Science at International Hellenic UniversityBachelor Computer Science, Bachelor Computer Science at Aristotle University of Thesaloniki
English
Stackoverflow
288reputation
37kreached
19answers
2questions
Github Skills (18)
custom-view6
firebase6
android6
calendar-view6
facebook-graph-api6
firebase-realtime-database6
android-fragments6
java6
facebook6
facebook-android-sdk6
authentication6
firebase-authentication6
android-library5
switch3
sticky3
Programming languages (2)
Github contributions (5)
nzisis/E-Nurse-Project
Dec 2014 - Jul 2015
Contributions:28 commits, 10 pushes in 6 months
nzisis/HealthAdvisor
Feb 2015 - Nov 2015
Contributions:48 pushes, 1 branch in 8 months
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