Tommaso Marcelli
Engineering Manager at Klarna
Milan, Lombardy, Italy
Summary
👤
Senior🎓
Top SchoolTommaso Marcelli is an engineering manager based in Milan with 11 years of experience building back-end services in Node.js and Ruby and shipping SPA front-ends with modern tooling. He currently leads engineering at Klarna after CTO and technical leadership roles in startups, blending hands-on coding with team and product stewardship. Comfortable with cloud deployments and DevOps tooling, he also brings a practical appreciation for UI/UX that keeps product quality user-centered. His career began in academic research and teaching—holding a PhD in Chemistry and multiple postdoctoral roles—which informs a data-driven, experimental approach to problem solving. That uncommon shift from computational chemistry to software leadership gives him fluency in technical depth and cross-disciplinary communication. He’s known for turning complex requirements into pragmatic, maintainable systems while mentoring engineers through growth and delivery challenges.
11 years of coding experience
11 years of employment as a software developer
Master Industrial Chemistry, Master Industrial Chemistry at Alma Mater Studiorum – Università di BolognaPhD Chemistry, PhD Chemistry at University of Amsterdam
English, Italian, French, Dutch
Github Skills (58)
multistage9
vue9
cat8
vue-loader8
nodejs8
docker-image7
foundation7
javascript7
loader7
webpack7
wordpress7
gulp7
extraction7
sql7
router7
Programming languages (4)
Github contributions (5)
vue-foundation/vue-foundation
Jan 2017 - May 2017
Contributions:32 commits, 2 PRs, 27 pushes in 3 months
vue-routerfoundationvuewebpackrouter
hal0gen/-milano-melting-pot
Jun 2019 - Jun 2019
Costruiamo una mappa dell'immigrazione a Milano, quartiere per quartiere. Hackathon track per SOD19.
Contributions:5 pushes in 4 days
milanounadell
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.