Marcos Prieto
Back End Developer at Close
Salamanca, Castile and León, Spain
Summary
🤩
Rockstar🎓
Top SchoolMarcos Prieto is a seasoned back-end developer with 13 years of experience building and leading engineering teams across startups and open-source projects from Spain. He has held senior roles including Lead Back End Developer at Hypothesis—contributing notable back-end and SQL performance improvements to a widely used annotation platform—and now works at Close. His career blends hands-on systems and database work with leadership experience as a former CTO and engineering lead, making him comfortable with architecture, OAuth flows, and long-lived service maintenance. Marcos pairs a formal computer science background (Bachelor’s and a Master’s) with a pragmatic focus on refactoring and performance that often surfaces in legacy-code bases. Colleagues rely on him to translate product needs into robust, maintainable back-end services and to improve critical data interactions behind the scenes.
13 years of coding experience
18 years of employment as a software developer
Masters, Computer Science, Masters, Computer Science at Universidad Nacional de Educación a Distancia - U.N.E.D.Bachelor's, Computer Science, Bachelor's, Computer Science at Universidad Pontificia de Salamanca
English, Spanish
Stackoverflow
35reputation
10kreached
4answers
5questions
Github Skills (21)
postgresql10
python10
sqlalchemy10
hy10
annotations9
annotation-processing9
apidoc9
api9
oauth9
annotate9
refactoring8
cs506
flask-socketio6
django-views6
flask6
Programming languages (9)
Github contributions (5)
hypothesis/h
Jan 2021 - Nov 2022
Annotate with anyone, anywhere.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:636 reviews, 145 commits, 873 PRs in 1 year 10 months
Contributions summary:Marcos primarily focused on back-end improvements, making several code changes related to database interactions and system maintenance. They addressed issues with the OAuth flow, updating deprecated arguments in the code and converting subqueries. Additionally, they explicitly declared literals in SQL queries for performance improvements and refactored code based on style guide updates.
pythonannotationannotateanywhere
hypothesis/report
Oct 2022 - Apr 2025
The internal global reporting product for Hypothesis
Contributions:112 reviews, 151 PRs, 152 pushes in 2 years 5 months
reporterinternalreporting
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