Ronald Bultje
Founder, President And CEO at Two Orioles
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolRonald Bultje is a founder and CEO with 22 years of software engineering experience who specializes in low-level systems programming (C and x86 assembly) and video codec research. He combines a PhD-level research background and strong math skills with hands-on optimization work—most notably contributing AVX2 SIMD improvements to the popular rav1e AV1 encoder to materially boost encoding performance. Ronald has held senior engineering roles at Google and Two Sigma and has run Two Orioles since 2015, blending product leadership with deep technical execution. Based in New York, he focuses on problems where algorithmic rigor and low-level performance engineering intersect, and brings rare expertise in both academic research and production-grade multimedia codecs.
22 years of coding experience
6 years of employment as a software developer
Praedinius GymnasiumMSc, MSc at Utrecht UniversityPhD, PhD at Cornell University
English, Dutch
Stackoverflow
11,046reputation
806kreached
246answers
5questions
mp4
top-5%
encoding
top-5%
decode
top-5%
audio
top-5%
filter
top-5%
ffmpeg
top-1%
Github Skills (27)
assembly10
performance-monitor10
performance-analytics10
encoder10
avx10
ffmpeg10
performance-measurement10
performance-analysis10
performance-tuning10
simd10
video-encoder10
performance-monitoring10
optimization10
decode9
encoding9
Programming languages (6)
Github contributions (5)
xiph/rav1e
Oct 2018 - Aug 2021
The fastest and safest AV1 encoder.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:84 commits in 2 years 10 months
Contributions summary:Ronald significantly contributed to the `rav1e` AV1 encoder by implementing AVX2 SIMD optimizations. These optimizations, including the addition of vertical loopfilter and horizontal loopfilter AVX2 SIMD implementations, were designed to enhance encoding performance. The user's commits involved modifying assembly files to leverage AVX2 instruction sets and address potential Wiener overflow issues. They also added an AVX2 implementation for SGR loop restoration to speed up encoding.
av1-encoderencoderfastestav1
twoorioles/FFmpeg
Jan 2016 - Mar 2025
Contributions:5 pushes, 1 branch, 4 tags in 9 years 4 months
ffmpegvideosource-git
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