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Principal Software Engineer (Java/FullStack)

Friday Systems

Madrid, Provincia de Madrid, Spain Full-time February 26, 2026

Found Description

Friday Systems allows industrial robots to adapt to dynamic warehouse environments using AI. We focus on high-throughput palletizing and related logistic tasks, by building distributed, cloud-native systems where reliability and scalability are non-negotiable. 


Tiny team, zero bureaucracy, direct impact, salary + equity.


THE ROLE


Take end-to-end ownership of our platform: Design distributed systems, build backend (80%) and frontend (20%) services, manage cloud infrastructure and ensure quality through testing and reviews. You’ll collaborate with founders to turn business strategy into technology that scales.


You’ll want to see your code in action on our physical robots, so plan on spending about half the week in the office. We don't have an in-office policy; we just focus on what gets the job done.


YOU WILL


  • Design, i...

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