John Cass
Systems Development Manager at Amazon Web Services (AWS)
Gauteng, South Africa
Summary
🤩
Rockstar🎓
Top SchoolJohn Cass is a systems development manager and seasoned technology leader with 11+ years delivering scalable software and operational solutions across financial and professional services. He has led engineering teams at AWS focusing on tooling, automation and EC2 platform scaling, and previously ran software engineering and advisory practices driving profit and growth in consulting and investment settings. John blends hands-on backend and DevOps experience—contributing to notable open-source projects like Mopidy and flask-mongoengine—with product and portfolio management skills that span due diligence, valuation and value-creation planning. His background in SAP consulting and P&L ownership for large teams reflects strong commercial and operational instincts alongside technical depth. Comfortable from embedded IoT sensor integrations to cloud-scale compute, he routinely bridges engineering, finance and legal perspectives to deliver pragmatic, risk-aware solutions. Based in Gauteng with an honors degree in Computer Science, he brings a track record of turning complex technical problems into reliable, production-ready systems.
11 years of coding experience
23 years of employment as a software developer
Advanced Programming Diploma: C/C++, Information Technology, Advanced Programming Diploma: C/C++, Information Technology at CTI Education GroupB.Sc. (Hons), Computer Science, B.Sc. (Hons), Computer Science at University of Pretoria
English, Afrikaans
Github Skills (45)
uart10
mopidy10
zone10
debug10
postgresql10
python10
apscheduler10
audio-playback10
django10
wtforms10
testing10
bash10
flask-ask10
mongodb-database10
gpio10
Programming languages (9)
Github contributions (5)
jcass77/django-apscheduler
Nov 2018 - Jul 2022
APScheduler for Django
Role in this project:
Back-end Developer
Back-end DeveloperContributions:9 releases, 11 reviews, 176 commits in 3 years 8 months
Contributions summary:John focused on enhancing the Django-based APScheduler integration. Their contributions included adding timezone support for datetime rendering, dropping support for legacy Django versions, and implementing a model manager to handle the deletion of old job executions. They also refactored the codebase, updating the build and CI/CD scripts, and applying Django's recommended app packaging guidelines. These changes demonstrate a focus on improving the functionality and maintainability of the APScheduler integration within the Django framework.
djangopythonapscheduler
django-tenants/django-tenants
Nov 2018 - Jun 2020
Django tenants using PostgreSQL Schemas
Role in this project:Backend Developer
Backend DeveloperContributions:37 commits, 11 PRs, 45 comments in 1 year 7 months
Contributions summary:John primarily focused on fixing regressions and improving path handling within the `django-tenants` project. Their contributions involved modifications to file storage, static file handling, and template loading mechanisms. The code changes address issues related to the correct location and access of static files and templates in a multi-tenant Django setup. The user also modified template loader and test cases.
pythondjango-tenantsdjangotenantsschemas
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