Marios Karagiannopoulos
Sr. Engineering Manager At MN RAN R&D (Hands On) at Nokia
Municipality of Patras, Peloponnese, Western Greece and the Ionian
Summary
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Senior🎓
Top SchoolMarios Karagiannopoulos is a seasoned software engineering leader with 11+ years delivering cloud-native, telecom and fintech systems at companies like Juniper, Citrix, Ericsson and Nokia, blending hands-on development with CTO-level strategy. He has built and led multidisciplinary teams, designed Kubernetes-as-a-Service platforms, and drove Continuous Testing and CI/CD transformations that scaled 5G ORAN QA and high-frequency trading systems. As a founder and fractional CTO he architected resilient, event-driven AI and IoT backends on AWS/GCP using Terraform, Keycloak and RAG pipelines, cutting deployment times and speeding feature delivery. He’s an advocate for AI-assisted engineering—integrating GitHub Copilot and LLM-driven lab access to boost team productivity and autonomy. A prolific documenter and mentor, he authored most QA knowledge bases at Juniper and has guided GSoC and IFTP mentees, showing a commitment to growing engineering talent. Based in Patras, Greece, he pairs deep low-level systems experience (C/C++, telecom stacks) with modern cloud/DevOps practice, making him effective across legacy and cutting-edge platforms.
11 years of coding experience
22 years of employment as a software developer
Master’s Degree Computational Mathematics & Informatics, Master’s Degree Computational Mathematics & Informatics at University of PatrasBachelor’s Degree Software Engineering, Bachelor’s Degree Software Engineering at University of West Attica
Greek, English
Stackoverflow
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Github Skills (30)
organize10
ipfs8
codecov7
travis-ci7
makefile7
api7
traffic7
python7
pytest6
java6
benchmark6
simulator6
testing6
libp2p6
p2p5
Programming languages (6)
Github contributions (5)
western-greece-developers/meetup
Jun 2017 - Oct 2020
A repository to help organize meetings and collect ideas, results, etc
Contributions:34 commits, 18 PRs, 36 pushes in 3 years 3 months
collectpythonorganize
gardenifi/raspirri_server
Dec 2023 - Mar 2024
RaspirriV1 is an intelligent irrigation system powered by RaspirriV1 server software designed for Raspberry Pi written in Python. Compatible with Raspbian OS, this robust system offers a versatile solution for automating irrigation, making it an excellent choice for both residential and commercial applications.
Contributions:74 releases, 55 PRs, 281 pushes in 2 months
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