Stephen McCullough
Senior Principal Engineer at Whitespace
Glenavy, Northern Ireland, United Kingdom
Summary
👤
Senior🎓
Top SchoolStephen McCullough is a Senior Principal Engineer from Glenavy, Northern Ireland with 15 years of experience building scalable backend systems and platform services across startups and larger organisations. He combines hands-on engineering with architectural leadership, shaping SDLC practices while building AI-enabled applications that integrate LLMs, retrieval workflows and reliable production services. A polyglot comfortable in Ruby, Python and Elixir, Stephen has led teams, founded a boutique consultancy (SkillfulGorilla) and driven cloud and serverless modernisation as a Cloud Architect. He is adept with distributed systems, Docker, CI/CD and operational practices, and increasingly focuses on practical LLM integration using tools like Ollama and RAG patterns. Beyond day-to-day engineering he co-organises Belfast Ruby, PyBelfast and Belfast Elixir, sharing knowledge locally and mentoring engineers. Breathing since 1979, he pairs deep curiosity (and a fondness for vim) with a pragmatic drive to turn proofs of concept into maintainable production systems.
15 years of coding experience
22 years of employment as a software developer
HND, Computer Software Engineering, HND, Computer Software Engineering at BIFHEBachelor of Technology (BTech), Computer Studies, Bachelor of Technology (BTech), Computer Studies at NEIFHE
Github Skills (63)
listings10
displays9
perl9
recurring9
parse8
static-site8
metadata8
jekyll7
ruby7
kitchen7
dates7
django7
python7
vim6
parser6
Programming languages (9)
Github contributions (5)
swmcc/stuffilearned
May 2015 - Feb 2023
Contributions:6 pushes, 2 branches, 2 issues in 7 years 10 months
swmcc/swmcc.github.io
Feb 2015 - Aug 2022
Source for my personal site.
Contributions:50 PRs, 108 pushes, 45 branches in 7 years 7 months
jekyll
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