Fotios Tzellos
Senior Software Engineer at Bread
Denver, Colorado, United States
Summary
👤
Senior🎓
Top SchoolFotios Tzellos is a Senior Software Engineer with 11+ years building large-scale, event-driven distributed systems and globally scaled, high-performance services across adtech and media. He has led re-architecture efforts and tech migrations—designing Golang-based services that handle millions of QPS, adopting Kubernetes for minute-scale CI/CD, and orchestrating multi-POP deployments while managing stakeholder expectations. His stack spans C++, Python, JavaScript/Node, Java, NoSQL/graph/relational databases, AWS, Terraform and Kubernetes, and he has deep experience in API design, auth/identity systems and edge authorization. Earlier roles at the BBC and Digital Vision underscore a solid background in high-throughput media delivery and performance-driven C++ engineering. Based in Denver, he combines hands-on implementation with cross-functional design thinking and a knack for turning legacy architectures into resilient, testable platforms.
11 years of coding experience
14 years of employment as a software developer
Master of Engineering (MEng), Computer Science, Master of Engineering (MEng), Computer Science at 2003 - 2007 University College London
Greek
Github Skills (50)
python10
http10
sdk10
python-requests10
irc-bot9
javascript9
api9
python-client9
http-client9
irc8
irc-protocol8
robot8
sasl8
balloon8
irc-bot-framework7
Programming languages (7)
Github contributions (5)
FodT/t1-python
Aug 2015 - Jan 2019
Python implementation of a T1 API Library
Contributions:129 pushes, 98 branches in 3 years 5 months
python-implementationapipythonapi-library
FodT/aoc-2022
Dec 2022 - Dec 2022
Contributions:18 commits, 13 pushes, 1 branch in 7 days
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.