Bárbara Hartmann
Senior Backend Engineer at Gigs
Berlin, Germany
Summary
👤
Senior🎓
Top SchoolBárbara Hartmann is a Senior Backend Engineer based in Berlin with 12 years of experience building resilient, high-throughput financial and subscription systems. She led design and delivery of Nubank’s Pix instant payments platform, helping it scale to over a million transactions per day, and has since applied that payments and integrations expertise at HelloFresh and now at Gigs, a startup building Stripe-like billing for phone plans. Known for pragmatic system design and performance troubleshooting, she has repeatedly shipped features that serve millions of users, including tax report generation and WhatsApp Payments integrations. Comfortable across the stack, Bárbara’s background spans Java, Ruby on Rails and API-first architectures from her ThoughtWorks and early-career work, bringing disciplined engineering practices to fast-moving teams. She pairs production focus with a collaborative mindset—having spoken at conferences and mentored across hiring processes—so she balances hands-on coding with technical leadership.
11 years of coding experience
10 years of employment as a software developer
Computer Technician Computer Programming, Computer Technician Computer Programming at IFSUL - Instituto Federal Sul-rio-grandenseTechnologist Higher Education Program (Tecnólogo) Systems Analysis and Development, Technologist Higher Education Program (Tecnólogo) Systems Analysis and Development at UnisinosBachelor's degree Computer Science, Bachelor's degree Computer Science at Federal University of Rio Grande do Sul
Portuguese, English
Stackoverflow
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Github Skills (12)
plugin10
sinatra9
sequel9
pagination8
ruby7
rails7
ruby-on-rails6
activerecord5
rio4
clojure3
clojurescript3
javascript1
Programming languages (4)
Github contributions (5)
bahartmann/trampolim
Jun 2014 - Nov 2014
Contributions:99 commits in 5 months
jenmchl/veganburger
Apr 2020 - Oct 2020
Contributions:32 pushes in 5 months
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