Cian Butler Email & Phone Number

Dublin, Ie

Dublin, County Dublin, Ireland

As the lead Site Reliability Engineer at a security-focused startup, I contribute to the design and implementation ofcritical infrastructure and services that enable secure payment processing and data protection.My key achievements include:Collaborated on the development and scaling of a Confidential Computing platform using secure enclaves, working withthe team to enable customers to run sensitive workloads in fully attested environments. Successfully optimised and scaled both Rust and Node.js-based API services to meet growing demand while maintaining performance and reliability.Contributed to the development of a transparent HTTP encryption proxy service that helps customers achieve PCI DSScompliance through automated data protection, and supported the implementation of a 3D Secure payment gatewayintegration, expanding our payment processing capabilities.Established comprehensive incident management frameworks and automation, fostering a culture of continuous improvementthrough systematic incident analysis and learning. This includes designing monitoring solutions and operationaltooling that enhance service reliability and team efficiency.

Dublin, Leinster, Ireland

Site Reliability Engineer at Demonware, supporting online gaming services for major AAA titles including Call of Duty.Progressed through multiple specialised teams, focusing on monitoring, data pipelines, and observability whilehandling massive scale requirements.Contributed as a core team member to the design and implementation of an automated monitoring and alerting pipelinethat successfully replaced manual NOC operations. Engineered and maintained high-throughput data pipelines processingbillions of real-time telemetry datapoints per second from millions of concurrent users.Led the migration and unification of disparate logging and tracing systems to an OpenTelemetry-based distributedtracing platform, standardising observability practices across all Python services within the organisation. Thisunified approach significantly improved cross-service visibility and troubleshooting capabilities.Participated in the Root Cause Analysis review group, contributing to the improvement of post-incident reviewprocesses by reviewing major incidents and providing technical guidance to teams. This work helped establish moreeffective practices for learning from and documenting system failures.

Dublin, County Dublin, Ireland

Site Reliability Engineer at Raspberry Pi Foundation, supporting the CoderDojo community platform that enables youthcoding education worldwide. Led significant infrastructure modernisation efforts while contributing to educationaltechnology initiatives.Orchestrated the migration of the [Zen community platform](https://zen.coderdojo.com) from monolithic AWS instances toa Kubernetes-based architecture, enabling independent service scaling and improving overall system reliability.Modernised the deployment pipeline and upgraded core dependencies across microservices, significantly enhancingplatform stability and maintainability.Implemented comprehensive monitoring solutions using NewRelic and Graphite to ensure platform reliability andperformance. Developed a data warehouse solution to gain insights into community engagement and volunteer supportneeds, enabling data-driven decisions for community support initiatives.Contributed to the development of the organisation's learning resource platform, helping create tools for sharingeducational content and projects with the global CoderDojo and Code Club communities.

Served as Webmaster for Redbrick, Dublin City University's Computing Society, managing web infrastructure thatprovided computing services to the student community. As part of a three-person systems team, maintained and enhanceda diverse ecosystem of user-facing services.Responsible for ensuring availability of infrastructure including student web spaces, collaborative tools (Wikisystems, Gitea), and social platforms (Mastodon, IRC). Handled system troubleshooting and maintenance of on-campusservers and managing common infrastructure and network challenges.Designed and maintained the society's website while managing service upgrades and implementing new features to supportthe growing student computing community.

Dublin

Computing Lab Tutor at Dublin City University, providing hands-on programming support to astrophysics studentsdeveloping complex mathematical applications. Guided students through algorithmic problem-solving, programmingconcepts, and best practices in scientific computing. Developed effective techniques for explaining technicalconcepts and debugging methodologies, helping students bridge the gap between theoretical physics and practicalimplementation.

Software Engineering Intern at CoderDojo, contributing to the development of the Zen platform that supports a globalcommunity of volunteer coding mentors. As part of a small, dynamic team, worked across the full stack to enhance theplatform that enables children's coding education worldwide.Developed new features using Angular and Node.js, working on both frontend and backend components of the communityplatform. Managed deployment pipelines and AWS infrastructure, including maintaining critical community engagementtools like the forums system.

Dublin

This consisted of maintaining 20 laptops for training purposes - updating, cleaning and customizing them for training sessions as required.

Dublin

Creating promotional videos from pre-recoded material for use at international and biennial TEEU conferences

Dublin

Migrating the site and domain from the previous web host. Updating the website to an up to-date Wordpress install, securing it and redesigning the layout for easier navigation and customer access.liffeyvalleypar3golf.com

I designed the new layout for the clubs website and I am currently providing ongoing maintenance and updating information about club activities. http://redbrick.dcu.ie/~archery

Dublin City University

Answering all questions sent to redbrick.Designing and giving talks to students on a range of topics including Redbrick services, linux, programing skills, server set up and maintenance.Organizing workshops with past and associate members.

Maintenance work for customers personal computers and phones. This includes the setting up of backups and virus protection, hardware repairs including drives, screens and battery replacement. Building customized desktops computers for specialized used such as video editing.

Dublin City University

managing the money and filling out grant requests

Helping customers, selling products, diagnosing computer problems and repairing computers, including windows macs and linux computers

Bachelor'S Degree, Computer Programming, Specific Applications

Activities and Societies: Clay target shooting, archery, redbrick, gameing society

High School, Leaving Cert

Activities and Societies: orienteering, library, maths competionswon all ireland team maths competition