Irfan Ahmed
Senior Fullstack Developer at Doctolib
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolIrfan Ahmed is a founder and senior Ruby backend engineer with over a decade of hands-on experience building fintech systems, specializing in digital wallets, ISO8583 financial messaging, settlements, reversals and PCI-compliant KYC flows. He has led engineering teams and delivered production features like wallet-to-ATM cardless withdrawals, real-time bank switch integrations (NPSB) and instant cashback/referral services across startups and scale-ups. Based in Berlin, he combines deep protocol-level payment expertise with practical backend craftsmanship in Ruby, Go and robust API design. A long-time community contributor and mentor, he’s spoken at RubyConf Dhaka, contributed to popular Rails projects and volunteers to train new developers in Bangladesh. Not obvious from job titles: he builds low-level TCP socket messaging bridges for high-reliability payment rails, marrying protocol engineering with product-focused delivery.
11 years of coding experience
B.C.S.I.R High School, Class 5-S.S.C, B.C.S.I.R High School, Class 5-S.S.C at Maple Leaf International SchoolGraduation, Computer Science and Engineering, Graduation, Computer Science and Engineering at University of Liberal Arts Bangladesh
Bengali, English
Stackoverflow
3,567reputation
590kreached
137answers
6questions
ruby
top-5%
ruby-on-rails
top-5%
Github Skills (95)
devise10
programming-language10
mvc10
authentication10
rails-gem10
ruby10
activerecord10
ruby-on-rails10
shared10
currency10
html10
spree10
rust10
rails10
marketplace10
Programming languages (6)
Github contributions (5)
rubyrider/music_cms
Sep 2015 - Dec 2016
Contributions:13 PRs, 78 pushes, 7 branches in 1 year 2 months
rubyrider/clomp
Dec 2017 - Feb 2018
Contributions:2 releases, 60 commits, 43 pushes in 1 month
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