Lorcan O'Flynn, Developer in Dublin, Ireland
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Lorcan O'Flynn

Verified Expert  in Engineering

DevOps Engineer and Developer

Dublin, Ireland
Toptal Member Since
August 10, 2021

Lorcan is a DevOps and cloud engineer with ten years of experience helping product companies build, grow, and scale their offerings globally. His past roles include head of engineering, CTO, developer, system administrator, DevOps, and CloudOps engineer. Lorcan's expertise includes DevOps, CloudOps, solution architecture, serverless, cloud infrastructure engineering, CI/CD, microservices, containerization, systems integration, and cloud security, leveraging AWS, Python, Django, and Docker.


Amazon Web Services (AWS), Python, Serverless Framework...
The Eclair Group
Amazon Web Services (AWS), Python, APIs, Infrastructure as Code (IaC)...
Ansible, Amazon Web Services (AWS), Puppet, Amazon EC2...




Preferred Environment

Amazon Web Services (AWS), Django, AWS CloudFormation, AWS DevOps, Python, APIs, Serverless Framework, Docker, AWS IAM, Amazon CloudWatch

The most amazing...

...thing I've worked on is a robotic process analytics SaaS product, developing it from day zero to eventual acquisition as the head of engineering.

Work Experience

Principal Engineer

2019 - PRESENT
  • Built and delivered an AWS cloud platform for a legaltech business with 99% IaC, 100% continuous integration, zero manual application deployments, and zero configuration drift, and 100% of the changes were auditable and traceable.
  • Developed a secure and cost-optimized architecture in line with the AWS Well-Architected framework for a regtech business. Delivered automated and scheduled document parsing with a 100% success rate and 99% IaC coverage.
  • Built a 100% serverless platform for a logistics business with an extremely low total cost of ownership, 100% IaC coverage, and 100% continuous integration, and the platform cloud autoscaled seamlessly.
Technologies: Amazon Web Services (AWS), Python, Serverless Framework, Amazon Elastic Container Service (Amazon ECS), AWS IAM, Amazon EC2, Amazon CloudWatch, AWS CloudFormation, AWS CodeBuild, AWS CodePipeline, Elasticsearch, Amazon DynamoDB, Amazon Cognito, Linux, Docker, PostgreSQL, Serverless, Continuous Integration (CI), Architecture, Infrastructure as Code (IaC)

Head of Cloud Engineering

2017 - 2019
The Eclair Group
  • Developed a globally scalable infrastructure with 100% IaC coverage.
  • Architected and developed a multi-tenanted, multi-account, cross-region system architecture for tier-one banks.
  • Coordinated feature releases, held scoping meetings, performed code reviews, hired new talent, and worked closely with C-level executives and product owners on the product roadmap.
  • Hired and collaborated with data engineers to design and develop data management systems in a microservices environment.
  • Created APIs with Python to support the product's analytics offering.
  • Developed DevOps pipelines and software delivery capabilities using CI/CD tooling, serverless-based automation, and notifications.
  • Designed and developed AuthN and AuthZ capabilities in a multi-tenanted microservices environment.
  • Worked with third-party penetration testers to provide test environments, performed remediation steps, and introduced recommended enhancements to the product roadmap and priorities accordingly.
  • Ensured that the product infrastructure and architecture were secure at all layers.
Technologies: Amazon Web Services (AWS), Python, APIs, Infrastructure as Code (IaC), Serverless, Ansible, Amazon CloudWatch, Amazon Elastic Container Service (Amazon ECS), Amazon EC2, Amazon DynamoDB, Amazon RDS, AWS IAM, Amazon S3 (AWS S3), Amazon Cognito, Product Roadmaps, Architecture, Code Review, Microservices, DevOps, CI/CD Pipelines, Technical Hiring, DevOps Engineer

Senior DevOps Engineer

2013 - 2017
  • Assumed the role of environment manager across departmental data center servers to standardize and manage environments through automated means via IaC.
  • Served as the continuous delivery lead during a company-wide move to a DevOps-style methodology across all departments. This involved working with departments and stakeholders to automate the SDLC of various enterprise-grade COTS products.
  • Oversaw the infrastructure design, development, and provisioning on AWS of GoCD CI/CD clusters for multiple departments across the organization.
Technologies: Ansible, Amazon Web Services (AWS), Puppet, Amazon EC2, Continuous Delivery (CD), Product Monitoring, Cloud Environments, Environmental Design, Architecture, MySQL, AWS CloudFormation, AWS IAM, GoCD, DevOps, Infrastructure as Code (IaC), DevOps Engineer

Intelligent Robotic Process Automation Platform

An intelligent robotic process automation platform called eve. I was tasked with taking the founder's vision and turning it into reality using a purely cloud-based architecture. The goal was to support robot process automation initiatives in tier-one enterprises with intelligent automation analytics, such as robots working through x number of processes per hour, which has a cost-benefit to the department of y.

The development commenced in early 2017, I joined the company as number three, and assumed the head of engineering role. I had the pleasure of hiring and working closely with a new product team comprising two front-end developers, an API developer, a QA engineer, two data engineers, a DevOps engineer, and a product manager.

I was hands-on across the stack, from infrastructure to operations to APIs, while also working closely with front-end development and product management to ensure that high-quality product features were developed and shipped in a stable manner to production. I also provided technical leadership and mentorship across the entire product team.

The system was 100% cloud-based and multi-tenanted, utilizing 100% IaC to support the same stack across three regions in Sydney, Dublin, and the United States.
2007 - 2009

Bachelor of Engineering Degree (Hons) in Digital and Software Systems Engineering

Galway-Mayo Institute of Technology - Galway, Ireland

2006 - 2007

Bachelor of Engineering Degree in Computer and Electronic Engineering

Galway-Mayo Institute of Technology - Galway, Ireland

2004 - 2006

Higher Certificate in Electronic Engineering

Galway-Mayo Institute of Technology - Galway, Ireland


AWS Certified DevOps Engineer Professional



AWS Certified Developer Associate



AWS Certified SysOps Administrator Associate



AWS CloudFormation, Ansible, AWS IAM, Amazon Elastic Container Service (Amazon ECS), Amazon Cognito, AWS CodeBuild, Amazon CloudWatch, Puppet


Continuous Delivery (CD), DevOps, Continuous Integration (CI), Microservices


Amazon Web Services (AWS), Docker, Amazon EC2, Linux, Apache2, AWS Lambda


Amazon S3 (AWS S3), Cloud Environments, Amazon DynamoDB, Elasticsearch, PostgreSQL, MySQL


Python, JavaScript


Django, Serverless Framework


AWS DevOps, DevOps Engineer, APIs, CI/CD Pipelines, Infrastructure as Code (IaC), AWS CodePipeline, Environmental Design, GoCD, Cloud Infrastructure, AWS Certified DevOps Engineer, Serverless, Web Security, Networking, Amazon RDS, Product Monitoring, Architecture, Product Roadmaps, Code Review, Technical Hiring, Team Leadership, Cross-functional Team Leadership

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