# Eric Arellano

> Tech lead at IBM Quantum |  Developer productivity & open source | Python, TypeScript, & Rust

Location: New York, New York, United States
Profile: https://flows.cv/ericarellano

Tech lead for IBM Quantum's documentation infrastructure, creating one cohesive experience by unifying 12 APIs, 5 internal teams, and 6 external companies.

Six-year background in developer productivity and focus on creating quality software. Love for writing documentation, mentoring others, designing intuitive APIs, and crafting error messages.

I try to scale impact by investing in my team and creating psychological safety. Former volunteer crisis counselor, where I learned empathy, being careful with assumptions, and remaining non-judgmental.

Interested in impact-oriented engineering opportunities, such as climate or civic tech. I thrive in entrepreneurial teams and startups. Most proficient in Python, TypeScript, and Rust, but I'm flexible and focused on impact.

## Work Experience
### Software Engineer @ IBM
Jan 2023 – Present | New York, New York, United States
Tech lead for IBM Quantum's documentation and learning infrastructure, https://quantum.cloud.ibm.com/docs.

### Software Engineer (Pro-Bono) @ Parking Reform Network
Jan 2023 – Present | New York, New York, United States
Main contributor for the viral map projects https://parkingreform.org/parking-lot-map/ and https://parkingreform.org/mandates-map/.

- Redesigned UI to be mobile-friendly, accessible, and intuitive
- Migrated data management of 10,000 records to Directus (Postgresql) from Google Tables
- Mentored intern in rewrite from R to TypeScript
- Automated nightly enrichment of 1,200 Salesforce records for better member engagement

### Software Engineer @ Toolchain
Jan 2019 – Jan 2022 | Tempe, Arizona, United States
- Top maintainer of open source Pants build system. https://www.pantsbuild.org
- Added Pants's flagship feature: dependency inference, which reduces boilerplate by ~90% for using the tool and improves cache invalidation by ~30%.
- Implemented Pants's Target API after ~2 years of unresolved design talks, with a focus on a declarative, composable interface that leverages Python idioms.
- Stabilized remote cache client using gRPC and Remote Execution API, including using Grafana for monitoring.
- Migrated Pants's Python <-> Rust FFI to PyO3.
- Spoke at PyCon US 2021 about Python + Rust native extensions, Podcast.__init__ about Pants and developer productivity, Humans Of DevOps about "the curse of knowledge", Rustacean Station about Python + Rust, and InfoQ about inclusive open source communities.
- Wrote the majority of docs for Pants: https://www.pantsbuild.org/docs.
- Jumpstarted internship program, including mentoring intern for 5 months with a focus on cultivating software engineering best practices.

### Software Engineer @ Twitter
Jan 2019 – Jan 2019 | Tempe, Arizona
- Rewrote Pants open source project to use Python 3, resulting in increased developer productivity and 10-20% performance increase for most daily tasks run by Twitter engineers.
- Implemented remote build execution for Pants tests, resulting in 3x speedup of Pants' tests pipeline.
- Changed PEX open source project to make produced artifacts bit-for-bit reproducible.
- Introduced type hints to Pants project.

### Software engineering intern @ Foursquare
Jan 2018 – Jan 2018 | New York, New York
- Spearheaded migration to Python 3 and type hints for 1.3mn line codebase.
- Led rewrite of open source Pants build tool to Python 3.

### Data Engineering Intern @ GE Digital
Jan 2017 – Jan 2017 | San Francisco Bay Area

### Quality Assurance Intern @ bop.fm (acquired by LifeLock)
Jan 2013 – Jan 2014 | San Francisco
Youngest intern (16-17) for Y Combinator-backed digital music startup.

### Founder @ OutBound
Jan 2013 – Jan 2014
Founded online resource while in high school to help LGBTQ youth come out of the closet by safely connecting with personalized mentors.

### Co-Founder @ Just Dig It
Jan 2009 – Jan 2013 | Pleasanton, CA
Launched nonprofit at age 13 that raised $30,000 for clean drinking water in Ghana, West Africa.


## Education
### Bachelor of Science (B.S.) in Computer Science
Arizona State University

### Semester Exchange Program
Tecnológico de Monterrey


## Contact & Social
- LinkedIn: https://linkedin.com/in/arellanoeric
- GitHub: https://github.com/Eric-Arellano

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Source: https://flows.cv/ericarellano
JSON Resume: https://flows.cv/ericarellano/resume.json
Last updated: 2026-03-23