David Kelly

Results-driven Senior Software Engineer with 9+ years of experience designing and scaling distributed systems across fintech, publishing, and e-commerce domains. Proven expertise in microservices, containerization, and cloud native architectures using Golang, PHP, MySQL, Kafka, and Kubernetes. Experienced technical leader with a track record of modernizing legacy systems, optimizing CI/CD pipelines, and mentoring engineering teams to deliver high impact products

Senior Software Engineer - Pax Arctic - USA Remote

(2023-01 - 2026-06)

• Led the development and maintenance of custom SaaS solutions for U.S. government clients.
• Managed and modernized legacy backend systems, reducing technical debt while improving performance, reliability, and maintainability.
• Designed, developed, and maintained microservices using Golang and PHP.
• Managed backend services and data layers using MySQL and Redis.
• Implemented event-driven communication and real-time data processing using Kafka and RabbitMQ
• Improved CI/CD pipelines and containerization workflows using GitLab CI/CD, Docker, and Kubernetes.
• Implemented system monitoring and observability using Prometheus, Grafana, and Loki.
• Collaborated with frontend, data engineering, and government stakeholders to translate business requirements into scalable backend solutions.
• Supported secure, highly available systems while working within government compliance and infrastructure requirements.

Backend Developer - Adnomaly Technologies GmbH - Berlin, Germany

(2019-01 - 2023-01)

• Led backend development of SaaS services based on business and product requirements.
• Designed, developed, and maintained scalable backend applications and services using PHP and MySQL.
• Managed existing and legacy codebases, performing maintenance, refactoring, optimization, and bug fixing.
• Designed and maintained asynchronous and distributed backend processes using RabbitMQ and Redis.
• Managed backend architecture, integrations, APIs, and database operations across multiple projects.
• Worked with AWS cloud services and distributed data storage solutions, including DynamoDB.
• Supported search and data-indexing functionality using Amazon OpenSearch.
• Reviewed code, supported technical decision-making, and coordinated backend development within the team.
• Collaborated with frontend developers and other stakeholders to translate business requirements into technical solutions.

Web Developer - Strandum HR - Dublin, Ireland

(2017-01 - 2019-01)

• Designed and implemented an employee time-and-attendance system using Raspberry Pi, Python and Flask.
• Developed the accompanying web-based management panel using PHP, jQuery and Bootstrap.
• Developed backend functionality and APIs while contributing to frontend development and user interface improvements.
• Integrated attendance hardware with web-based software for employee time tracking and management.
• Worked across the full development cycle, including system design, implementation, testing and maintenance.

Bachelor's - Electrical Engineering - Cork Institute of Technology (2013-01 - 2017-01)