Julio Barba

Software Engineer

Durham, North Carolina, United States13 yrs 11 mos experience

Highly Stable

Key Highlights

12 years of experience in video encoding and backend development.
Key contributor to AV1 and AV2 open source encoders.
Expert in optimizing image and video coding tools.

Stackforce AI infers this person is a Video Encoding and Backend Development expert with significant contributions to open source projects.

Contact

Skills

Core Skills

Av1 Video Codec

Other Skills

CFfmpegVideo Metrics.NETC#SQLGitTeam Foundation ServerVisual StudioASP.NET MVCRESTASP.NETVB.NETWindows ServerJavaScript

About

Software Engineer with a combined 12 years of experience in video encoder and backend development. Proven expertise in enhancing perceptual quality efficiency and optimizing image and video coding tools. Extensive experience in both the design and implementation of normative and non-normative coding tools, and a contributor to AV1 and AV2 open source encoders.

Experience

13 yrs 11 mos

Total Experience

2 yrs 10 mos

Average Tenure

2 yrs 4 mos

Current Experience

Self-employed

Software Engineer - Media

Jan 2024 – Present · 2 yrs 4 mos · Durham, North Carolina, United States · Remote

Main SVT-AV1-PSY contributor, a community derivative of SVT-AV1 focused on perceptual
quality improvements and Quality of Life features. Most notable examples include:
◦ Still Picture Tune: worked on optimizing the encoder to maximize image quality and consistency. This tune is currently the state of the art in SSIMULACRA 2 and subjective evaluations for low to mid-high fidelity range: https://svt-av1-psy.com/avif/
◦ Enabled arbitrary resolution encoding support, including images with odd dimensions, and smaller than 64 pixels
Developed `--tune iq` for libaom, resulting in an improved visual quality and better scores on modern image quality metrics, including SSIMULACRA 2, DSSIM, FLIP, and Butteraugli. Users can generally expect up to a 17% reduction in file size for the same quality. https://aomedia-review.googlesource.com/q/owner:juliobbv@gmail.com
Contributed Variance Boost (Variance AQ implementation) to Intel’s SVT-AV1
encoder, which improves video consistency, and reduces average bitrate by 5% for a similar
subjective (MOS) quality target
◦ Worked on design, refinement, bug-fixing, and writing documentation, and incorporated
feedback from mainline developers and testers from diverse backgrounds

AV1 Video CodecC

Github

Software Engineer III

Jan 2020 – Jan 2022 · 2 yrs · Raleigh-Durham, North Carolina Area

Actions Runtime team - working on the Actions Runner: https://github.com/actions/runner

Microsoft

3 roles

Software Engineer II

Promoted

Sep 2015 – Dec 2019 · 4 yrs 3 mos

Azure Pipelines team -- worked on products like the Azure Pipelines Agent, and the Pipelines Server.
Previously at Visual Studio Cloud Services, Version Control Workflows team.

Software Engineer

Oct 2014 – Aug 2015 · 10 mos

Team Foundation Server, Version Control team.

Software Development Engineer in Test

Jun 2012 – Sep 2014 · 2 yrs 3 mos

Team Foundation Server, Version Control team.
Wrote multiple Command Line tools which uncovered multiple bugs with our TFS Git Server implementation (http://tfs.visualstudio.com/). Helped improve successful Git repository push rate from ~30% to almost a 100%.
Was one of the main testers of Git-TF (https://gittf.codeplex.com/), a Source Control bridge which allows a local Git repository interact with a TFVC server. Found dozens of bugs, ranging from cosmetic to severe.
Helped write test automation for the Git Server Object Model and the Git Tools Visual Studio integration (http://visualstudiogallery.msdn.microsoft.com/abafc7d6-dcaa-40f4-8a5e-d6724bdb980c).
Fixed simple bugs and added small features.
Team Foundation Server, OSS (CodePlex) team.
Involved in Manual and Automated testing of:
Service Hooks: http://www.visualstudio.com/en-us/integrate/reference/reference-vso-hooks-overview-vsi
CodePlex: https://www.codeplex.com/

Universidad de la salle bajio

Software Developer

Sep 2009 – Jul 2011 · 1 yr 10 mos

Implemented Point of Sale in Visual Basic .NET using WinForms and MySQL.
Assisted on the design and coding of the framework for interactive learning software, using Windows Presentation Foundation for the UI and SQLite for storing student progress and program data. Written mainly in C#, using some modules in Visual Basic .NET.