Daniel Magliola
Principal Software Engineer at Indeed Flex
London, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolDaniel Magliola is a Principal Software Engineer based in London with over 14 years of professional experience and two decades of hands-on development across desktop, web and client-server systems. He focuses on API back-ends and scaling pain points—improving performance, observability and reliability for services facing increased traffic—and has a track record of turning legacy, fragile systems into production-grade, well-monitored platforms. A prolific Ruby/Rails practitioner, he rewrote and now maintains the widely used Prometheus Ruby client, shipping performance improvements and API ergonomics that unlocked its use in production. Daniel combines startup DNA (multiple co-founder roles and a decade freelancing under Crystal Gears) with senior engineering leadership at companies like GoCardless and Indeed Flex, and he mentors engineers to accelerate ramp-up and promotions. He’s intensely curious about languages and paradigms beyond his core stack—currently exploring Elixir, Clojure and machine learning—while retaining an unusual obsession for squeezing milliseconds out of real systems.
13 years of coding experience
18 years of employment as a software developer
Technical High School, Technical High School at Instituto Tecnológico Phillips ArgentinaBusiness Administration, Business Administration at UADE
English, Spanish
Stackoverflow
31,532reputation
6.0mreached
52answers
196questions
datatable
top-5%
csv
top-1%
php
top-1%
iframe
top-5%
Github Skills (20)
utf10
histogram10
ruby10
php10
prometheus10
performance-optimization10
csv10
programming-language9
datatable9
client-library9
backgrounds9
iframe9
singledispatch6
ienumerable6
compatibility6
Programming languages (10)
Github contributions (5)
prometheus/client_ruby
Sep 2018 - May 2022
Prometheus instrumentation library for Ruby applications
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 releases, 73 reviews, 92 commits in 3 years 8 months
Contributions summary:Daniel primarily contributed to the Prometheus client library for Ruby, focusing on performance improvements and refactoring. They removed deprecation notices, improved the performance of the Histogram metric, and updated the Histogram to return buckets as strings. Additionally, they added a `with_labels` method to the Metric class, allowing for pre-setting labels. Finally, they removed quantile calculation from `Summary` to streamline the code.
instrumentationrack-middlewareprometheus-instrumentation-libraryrackruby-client
gocardless/prometheus_client_ruby
Sep 2018 - Dec 2019
Prometheus instrumentation library for Ruby applications
Contributions:5 PRs, 127 pushes, 10 branches in 1 year 3 months
instrumentationprometheus-instrumentation-libraryrubyprometheusmetrics
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