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Peter O'Callaghan

Software engineer based in Belfast 😊

LinkedIn / GitHub

👨🏻‍💻 Engineering Experience

Backend Engineer @ Monzo (May 2022 - Present)
Monzo Flex - Credit Card / Buy Now, Pay Later

Owning projects from start to finish, including planning, implementing, testing, shipping and monitoring

  • Led the Quieter Notifications project, reducing per-transaction notifications and introducing a new monthly payment reminder.
  • Led the project to automatically close dormant Flex accounts, removing unused lines credit being reported to CRA's for 1238 existing customers, 200 ongoing customers per month on average
  • Worked on the development of Flex Physical Cards, including API groundwork, acceptance testing, email notifications and UI changes.
  • Contributed to the Defer First Payment project, delaying initial repayments to a month later.
  • Transitioned all customer-facing app screens to a new design and architecture, implementing and testing all provided designs.

Additional Contributions:

  • Improved internal dev tooling.
  • Created and maintained internal documentation.
  • Proactively organized meetings and support for newer engineers coming through the Makers Bootcamp.

Technologies used: Go, JavaScript, React, SQL/BigQuery, NSQ/Firehose, Cassandra, GraphQL, CircleCI, Contentful.

👨🏻‍🎓 Education

Coding Bootcamp @ Makers (Dec 2021 - Apr 2022)
Full-time Software Engineering bootcamp

  • Object-Oriented programming
  • Web Development & REST APIs
  • Git, TDD and debugging
  • Created Uno game in Javascript for final project

Technologies used: Ruby, RSpec, JavaScript, Node.JS, Jest, React, HTML, CSS, Sinatra, MongoDB.

MSc Postgraduate Software Development @ Queen's University (June 2020 - June 2021)
Part time course for non-computing graduates

  • Object-Oriented programming
  • Web Development & REST APIs
  • Databases
  • Created multiple projects solo, paired, and in groups

Technologies used: Java, PHP, HTML, CSS, Bulma, SQL/MySQL.

BSc Hons in Creative Technology @ Ulster University - (2013 - 2017)
First Class Honours

HND in Music Technology @ SERC - (2011 - 2013)
Distinction

💁🏻‍♂️ Creative Training & Customer Service

Customer Operations @ Monzo (Feb 2020 - Dec 2021)
Expert in Savings, Subscriptions and general customer support

Creative Media Trainer @ BigRockDesigns (Mar 2019 - Sept 2019)
Delivered training courses on Video Editing, Audio Production & Digital Marketing

ICT A/V Technician @ Lagan College (Sept 2017 - Sept 2018)
Supported the school's ICT and A/V systems

Specialist @ Apple Retail (Aug 2008 - Aug 2013)
Sales, Training, Technical Support

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