Eddie Elizondo
Distinguished Software Engineer at Instagram
New York, New York, United States
Summary
🤩
Rockstar🎓
Top SchoolEddie Elizondo is a Distinguished Software Engineer based in New York with 11 years of experience building high-scale infrastructure and runtime systems, currently leading engineering strategy at Instagram. He blends deep systems-level expertise—ranging from RPC and Thrift optimization to Python runtime and object model design—with business-minded ownership of multi-billion dollar CapEx and cost-efficiency programs. Eddie has driven measurable reliability and cost savings (improving availability from three 9s to four 9s and delivering millions in savings) while contributing upstream to major open-source projects like CPython and Facebook Thrift. Known for translating low-level technical tradeoffs into company-wide architecture and hiring standards, he also authors language-level proposals (PEP 683) and has presented at conferences such as PyCon and CppCon. A tinkerer at heart who enjoys building things for fun, he pairs rigorous engineering with a talent for simplifying complex systems and deleting cruft at scale.
11 years of coding experience
11 years of employment as a software developer
High School, High School at Tecnológico de MonterreyBachelor of Arts (B.A.), Mathematics, Computer Science. Minor: Physics, Bachelor of Arts (B.A.), Mathematics, Computer Science. Minor: Physics at Lawrence UniversityMachine Learning Summer School '15, Machine Learning Summer School '15 at Kyoto University
Spanish, English
Github Skills (19)
c-language10
python10
memory-management10
capi10
c1110
c1710
type-system10
code-generation10
thrift10
cprogramming-language10
testing9
debug9
cpp-templates8
apptemplates8
performance-optimization8
Programming languages (10)
Github contributions (5)
facebook/fbthrift
Oct 2016 - Jun 2022
Facebook's branch of Apache Thrift, including a new C++ server.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:380 commits, 7 PRs, 1 push in 5 years 8 months
Contributions summary:Eddie primarily focused on implementing and testing features related to the deprecation of thrift cpp2 structs, including adding deprecation functionality and testing it with a full fixture. The user contributed to the expansion and improvement of the deprecated.thrift fixture, making autogenerated files easier to read and providing more thorough testing opportunities. They also added support for optional values and fixed issues related to enum declarations.
cppapache-thriftc-plus-plusapachefacebook
python/cpython
Feb 2018 - Dec 2024
The Python programming language
Role in this project:Back-end Developer
Back-end DeveloperContributions:54 reviews, 39 PRs, 235 comments in 6 years 10 months
Contributions summary:Eddie primarily contributed to the Python core, addressing issues related to memory management, object initialization, and type system behavior. They fixed bugs, optimized code, and added documentation to improve the stability and maintainability of the Python interpreter. These changes involved modifications to core Python objects, C API functions, and internal data structures. The user also addressed and fixed leaks within the posix module.
python-programmingprogramming-languagepythonpython-programming-language
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