Hussein Elsayed
Lead Software Engineer at On
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolHussein Elsayed is a Lead Software Engineer with 13 years of experience building payment and e-commerce systems, now based in Berlin. He advanced through Fullscript’s payments core from back-end engineer to Technical Lead, driving Stripe Connect and Avalara/Avatax integrations that improved transaction flow and tax compliance across global markets. Currently leading engineering at On, he blends a strong backend foundation in Ruby and distributed systems with pragmatic fintech-focused architecture and operational rigor. Hussein’s background in electronics and software engineering gives him a systems-minded approach to reliability and performance, while his international experience (Canada, Egypt, Germany) informs a collaborative, cross-cultural leadership style. He’s known for turning complex payment requirements into secure, scalable solutions and for mentoring teams to maintain technical precision under fast product development cycles.
13 years of coding experience
13 years of employment as a software developer
Bachelor of Science - BS Electronics and communication engineering, Bachelor of Science - BS Electronics and communication engineering at Alexandria UniversityDiploma in Software Engineering Software engineering - Java department, Diploma in Software Engineering Software engineering - Java department at Information Technology institute ITI
Arabic, English, German
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (34)
rails9
relay9
graphql-ruby8
graphql8
adyen8
payment-processing8
payment8
payment-gateway8
payment-integration8
ruby8
square7
rails-gem7
ruby-on-rails6
abstraction6
jquery6
Programming languages (2)
Github contributions (5)
helsayed/wunder
Mar 2016 - Mar 2016
Contributions:33 commits, 1 push, 1 branch in 1 day
helsayed/translation_center
Feb 2015 - Mar 2015
Contributions:2 releases, 12 pushes, 2 branches in 17 days
centercommunity-basedrailstranslationruby
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