Barry O'donovan
Internet Infrastructure Specialist - ISPs, IXPs And VoIP at Island Bridge Billing Systems
Dublin, Ireland
Summary
👤
Senior🎓
Top SchoolBarry O'donovan is an internet infrastructure specialist and co-founder of Island Bridge Networks and Island Bridge Billing Systems, with over 20 years of experience designing, building and operating ISP cores, IXPs and VoIP platforms. He is a hands-on technical leader who combines deep networking expertise (BGP, OSPF/IS-IS, IPv6, DWDM) with PHP full‑stack development and database work, and he leads IXP Manager—an open-source platform used by ~250 IXPs worldwide. Barry bridges engineering and finance as a Chartered Accountant (ACA) who also delivers outsourced CTO, product strategy, financial modelling and due diligence for tech companies. His work spans mission-critical services—DNS, NTP, DDoS mitigation, AAA/RADIUS—and bespoke billing and provisioning systems that integrate network and business operations. Based in Dublin, he contributes upstream to projects like DoctrineExtensions and is known for pragmatic, automation-first solutions that scale from regional exchanges to global peering fabrics. Colleagues rely on him for rare cross-discipline fluency: deep technical craft fused with corporate governance and management accounting.
15 years of coding experience
6 years of employment as a software developer
Chartered Accountancy / ACA, Chartered Accountancy / ACA at Chartered Accountants IrelandB.Sc. (Hons) Mathematics & Computer Science, B.Sc. (Hons) Mathematics & Computer Science at University of GalwayDiploma Corporate Governance, Diploma Corporate Governance at The Corporate Governance InstituteIrish Leaving Certificate, Irish Leaving Certificate at St Joseph's College, Galway, Ireland
English
Github Skills (5)
doctrine10
php10
database-design10
mysql10
unit-testing9
Programming languages (6)
Github contributions (5)
inex/IXP-Manager
May 2011 - Jan 2023
Full stack web application powering peering at over 200 Internet Exchange Points (IXPs) globally.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:38 releases, 4867 commits, 173 PRs in 11 years 10 months
Contributions summary:Barry's contributions primarily focused on enhancing the database schema and associated data structures for the IXP Manager project, including adding new columns for city and country to infrastructure and switches. They also improved the looking glass service by incorporating additional route views. Furthermore, the user addressed bugs related to the peering matrix and configuration generation to ensure the correct application of settings during route server filtering.
reactexchangeinternet-exchange-pointsfull-stackweb-application
beberlei/DoctrineExtensions
Jul 2018 - Jul 2018
A set of Doctrine 2 extensions
Role in this project:Back-end Developer
Back-end DeveloperContributions:9 commits, 2 PRs in 1 day
Contributions summary:Barry primarily contributed to adding and modifying MySQL-related functions within the Doctrine Extensions library. They added functions like `INET6_NTOA`, `INET_NTOA`, `IS_IPV4`, `IS_IPV4_MAPPED`, `IS_IPV4_COMPAT`, `INET6_ATON`, and `IS_IPV6`, which involve interaction with IP address conversion and validation. The user also corrected test file names and test function names to align with the new features, demonstrating a focus on ensuring the functionality of the MySQL extensions.
phpdbaldoctrine2extensionspdo
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