Rafael Sierra
Software Engineer at Delivery Hero
Berlin, Germany
Summary
👤
SeniorRafael Sierra is a seasoned software engineer with 18 years of experience building backend systems, APIs and deployable services, currently contributing at Delivery Hero in Berlin. Comfortable across many major languages and stacks, he has deep Python expertise from multiple roles and practical CI/CD and container deployment experience using GitLab CI/CD, Docker and Docker Swarm. He has led small teams, modernized legacy Python systems (including a Bayesian social media monitor) and operated production Linux infrastructure since the early 2000s. Though seeking roles focused on Python, he is actively exploring Go and Rust and brings a quick aptitude for learning new languages and paradigms. Rafael pairs pragmatic engineering—deploying directly to servers when needed—with an emphasis on maintainable microservices and observability.
18 years of coding experience
16 years of employment as a software developer
English
Stackoverflow
479reputation
41kreached
11answers
3questions
Github Skills (200)
image-processing10
webp10
svg10
dockerfile10
heic10
aws-s310
libvips10
django10
resize-images10
docker-compose10
api10
rest10
golang10
storage10
environment-variables10
Programming languages (10)
Github contributions (5)
rafaelsierra/cheddar
Mar 2013 - Dec 2016
Contributions:46 commits, 6 PRs, 48 pushes in 3 years 9 months
groupsreadergoogle-reader
rafaelsierra/poc-bugzilla-1336367
Feb 2017 - May 2019
Proof of concept for the reported crash on BugZilla 1336367
Contributions:2 PRs, 4 pushes, 2 branches in 2 years 3 months
bugzillaproof-of-concept
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.