Open to opportunities

Zack User

@zackuser

Message

Senior Python developer building scalable cloud-native backend systems and reliable APIs.

United States

Message

What I'm looking for

I seek backend/cloud-focused roles where I can build scalable APIs and microservices, improve reliability via CI/CD, collaborate with product/frontend teams, and integrate ML features in production.

I am a Senior Python Developer with seven years of experience designing and delivering scalable backend systems, microservices, and cloud-native applications. I specialize in FastAPI, Flask and Django, deploy production services on AWS (ECS, Lambda, RDS, S3), and optimize databases and APIs for high throughput and low latency.

I have migrated monoliths to Dockerized microservices, implemented CI/CD pipelines, reduced downtime and release cycles, and integrated lightweight PyTorch models for real-time features. I collaborate closely with frontend teams (React/Node), improve platform security with OAuth2/JWT, and focus on maintainable, testable code that supports fast growth.

Experience

Work history, roles, and key accomplishments

Current

Senior Python Developer

Current

Zack Kale

Jan 2022 - Present (4 years 5 months)

Designed and scaled Python microservices (FastAPI/Flask) handling 250K daily API requests with sub-200ms latency; migrated monolith to Docker/ECS reducing downtime by 40% and enabled daily CI/CD releases.

Python fastAPI Flask Docker AWS ECS CI CD PyTorch PostgreSQL Microservices

Python Engineer

Zack Kale

Jan 2020 - Jan 2022 (2 years)

Developed backend APIs processing 100M records monthly and improved query efficiency by 55%; built event-driven pipelines with AWS Lambda and implemented OAuth2/JWT to strengthen platform security.

Python AWS Lambda OAUTH2 JWT GitHub Actions SQL Event Driven Architecture Performance Optimization

Software Engineer

Zack Kale

Jan 2018 - Jan 2020 (2 years)

Built Flask-based internal tools used by ~100 employees and a Python CLI that saved HR ~10 hours/week; automated generation and delivery of 1,000 monthly reports with zero downtime.