John Lonergan

// Executive Director · Senior Principal Software Engineer

Executive Director & Senior Principal Software Engineer

2018 – present
JP Morgan · Cloud Services · London
  • Engineering lead across a collection of feature teams in Cloud Services, applied as a flexible senior resource where the organisation needs it most — adapting to diverse problems across the platform
  • Driving engineering standards, delivery practices, and cross-team design governance at senior principal level
  • Uses every available opportunity — code reviews, architecture discussions, pairing — to develop engineering practices and raise the standard of the craft across teams
  • Gives teams the space to make decisions and grow, whilst holding them accountable to doing the right thing
  • Strong advocate for collaboration: pair programming and standing in front of a whiteboard together to work through problems and find the best solution
  • Actively seeks out people with complementary skills and perspectives — no ego about where the right answer comes from
  • Very hands-on: leads from the code, not from a distance

Director & Technical Lead

2011 – 2018
Bank of America Merrill Lynch · Global Markets Securities Technology · London
  • Lead engineer on the BAML securities straight through processing system in the global securities middle office
  • Transformed the development culture from manual testing and slow release cycles to CI/CD and automated testing — short iterations, sustainable pace, frequent releases
  • Introduced automated acceptance testing and Specification by Example using Cucumber
  • Introduced Scala as the strategic programming language across global markets securities back office
  • Built a real-time inventory management system using event sourcing and CQRS
  • Designed a reverse proxy infrastructure for rapid, secure web application deployment
  • Led standardisation of server provisioning and security infrastructure, massively reducing effort and lead times
  • Built a data platform to support analytics and machine learning across securities data
  • Developed junior talent through coaching and pair programming

Director & Technical Lead

1994 – 2011
UBS Investment Bank · Advisory Technology · London
  • Technical lead for the bank's strategic CRM and Research systems across Java, C#, C++, SQL, and JavaScript
  • One of the leaders introducing agile methods including Scrum to the department
  • Introduced automated testing across the CRM and research platform
  • Built and maintained a web application firewall infrastructure protecting externally-facing bank systems
  • Migrated the bank's CRM from a vendor product to a fit-for-purpose proprietary solution
  • Re-architected analytics integration from Microsoft Office tools into equity research systems — over an order of magnitude performance improvement
  • Worked across telephony integration, network programming, load balancer infrastructure, and research matching systems

Software & Systems Engineer

1986 – 1994
Various — defence, industrial, and commercial
  • Hardware engineering and embedded systems in defence electronics
  • Unix device driver development for integration with industrial machinery
  • Concurrent software design for robotic systems
  • Real-time sampling and control systems
  • Low-level network programming including UDP/SNMP
  • Sybase DBA and consultancy

B.Eng Engineering Science

University of Liverpool

1983 – 1986