Stefan Costea
Cellular Firmware Engineer at Apple
Valencia, Valencian Community, Spain
Summary
👤
Senior🎓
Top SchoolStefan Costea is a cellular firmware engineer based in Valencia with nine years of hands-on experience building embedded and PHY-layer software for 4G/5G systems. Currently at Apple after an internship focused on tight-memory, real-time PHY firmware, he brings practical expertise in 3GPP protocols and performance-constrained embedded development. He has led technical efforts at Hyperloop UPV, bridging systems engineering and team leadership while shipping embedded software for high-stakes projects. Passionate about using software to automate processes and solve complex problems, Stefan combines low-level optimization skills with a knack for improving productivity in cross-disciplinary teams. An engineer who thrives under strict timing and resource limits, he pairs academic grounding from UPV with real-world firmware delivery at scale.
9 years of coding experience
3 years of employment as a software developer
Universitat Politècnica de València
Github Skills (10)
bluepill9
firmware8
hal8
popcorn4
streaming4
android4
player3
mobile2
media-player2
bittorrent1
Programming languages (3)
Github contributions (5)
StefanCostea/VirtuV
Nov 2024 - Mar 2025
Contributions:36 pushes, 1 branch in 3 months
StefanCostea/IPC_FinalTask
May 2023 - Jun 2023
Contributions:11 pushes, 1 branch in 6 days
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