Justin Leis
Staff Engineer at Republic Services
Glendale, Arizona, United States
Summary
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SeniorJustin Leis is a Staff Engineer with 12 years of experience building full-stack and backend solutions, currently leading engineering efforts at Republic Services from Glendale, Arizona. He spent over five years implementing DataSplice as a mobile Maximo solution, progressing from support specialist to software developer and later architect-level roles that blend customer-facing delivery with technical ownership. Justin has a strong backend pedigree, contributing to the Diesel ORM for Rust by adding unsigned integer support and cross-backend migration improvements—an indicator of his attention to type-safety and database interoperability. His career includes principal and solutions architect roles where he translated complex industrial requirements into scalable software, and he frequently bridges product, ops, and engineering teams. Known for pragmatic problem solving and ship-ready code, he brings both hands-on implementation skills and systems-level thinking to large enterprise environments.
12 years of coding experience
9 years of employment as a software developer
Github Skills (8)
rust10
orm10
query-builder10
mysql10
sql9
testing8
postgresql6
sqlite4
Programming languages (7)
Github contributions (5)
diesel-rs/diesel
Jan 2020 - Jan 2020
A safe, extensible ORM and Query Builder for Rust
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 commits, 1 PR, 5 comments in 4 days
Contributions summary:Justin contributed to the Diesel ORM library, primarily focusing on features related to unsigned integer support. They implemented standard operations for unsigned types and added tests for these new functionalities. The commits also included minor improvements such as removing an unnecessary implementation generator and some code formatting. Additionally, the user updated migration files for different database backends.
querymysqlrustsqlbuilder
DataSplice/IntermecScanner
Jan 2016 - Sep 2018
Contributions:10 PRs, 12 pushes, 6 branches in 2 years 8 months
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