Stephen Leonardo
Senior Backend Engineer at Grab
Indonesia
Summary
👤
Senior🎓
Top SchoolStephen Leonardo is a Senior Backend Engineer with 7 years of experience building high-concurrency systems and optimizing infrastructure for thousands of QPS. At Grab he has driven measurable efficiency improvements—cutting CPU utilization by 14% through flamegraph-driven optimizations and saving ~10% peak CPU via Redis pipeline and denormalization work. He also improved reliability with advanced sliding-window rate limiters that removed boundary bursts and reduced upstream QPS by a third. Comfortable across the stack, Stephen pairs production performance tuning with pragmatic system design and a TensorFlow certificate that hints at applied ML literacy. Based in Indonesia, he progressed from web development on .NET to backend platform engineering, bringing a hands-on approach to observability and bottleneck hunting. Colleagues rely on him to turn deep-dive analysis into repeatable, low-overhead optimizations that scale.
7 years of coding experience
4 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Universitas Bina Nusantara (Binus)
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (19)
python9
rest-framework9
django-rest9
coreapi9
django-rest-swagger9
documentation-generator9
google9
rest-api8
django8
api8
automation8
django-rest-framework8
rest8
swagger7
swagger-codegen7
Programming languages (7)
Github contributions (5)
christiansoetanto/kupboard
Jul 2021 - Jan 2022
Contributions:97 commits, 66 pushes, 1 branch in 5 months
StephenLeonardo/eventara-api
Jan 2021 - Feb 2024
Contributions:20 PRs, 67 pushes, 9 branches in 3 years 1 month
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