Isaac Wismer
Senior Software Engineer at Cash App
Kitchener, Ontario, Canada
Summary
👤
Senior🎓
Top SchoolIsaac Wismer is a Senior Software Engineer in Kitchener with 11 years of experience building reliable, production-grade systems using Kotlin, Python, C++, Rust and Java. He currently ships backend and infrastructure work at Cash App and has a track record of improving CI pipelines and reducing build times, plus experience developing medical-grade C++ software with thorough testing. His background spans geospatial systems, cloud-deployable Python services, and high-performance PostGIS-backed web services, reflecting strong full-stack and DevOps instincts. Outside of work he organizes and times large athletic events—skills that translate into calm logistics, mentoring, and on-the-ground problem solving during high-pressure releases. He’s equally at home refactoring monoliths into modular libraries or designing integration test suites, and he likes to climb mountains when not writing code.
11 years of coding experience
4 years of employment as a software developer
Ontario Secondary School Diploma, Ontario Secondary School Diploma at Centennial Collegiate Vocational InstituteB.Comp., Computer Science, B.Comp., Computer Science at University of Guelph
Github Skills (175)
security10
keepass10
text-based10
linux10
android10
mozilla10
password-manager10
windows-application9
dynamodb9
golang9
android-application9
messenger9
windows9
yubikey9
micro9
Programming languages (15)
Github contributions (5)
iwismer/GEOG4480
Mar 2019 - Nov 2022
Code from my GIS Capstone Project in W19
Contributions:1 PR, 4 pushes, 1 branch in 3 years 8 months
javacapstonepythongis
iwismer/rusty-timer
Nov 2018 - Apr 2020
Contributions:2 releases, 53 pushes, 1 branch in 1 year 5 months
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