André Sionek
Senior Staff Software Engineer at tem
Carlisle, England, United Kingdom
Summary
👤
Senior🎓
Top SchoolAndré Sionek is a Principal Software Engineer with 10+ years building reliable data platforms and cloud-native infrastructure, currently shaping data platform engineering at Catena Clearing. He specializes in AWS-driven IaC (CDK, Terraform), CI/CD automation, and production-safe microservices, having reduced test/deploy times by up to 85% and rebuilt full serverless stacks from scratch. A hands-on leader and instructor, he’s taught data engineering bootcamps to over a thousand students and drives developer confidence through rigorous testing cultures so teams can refactor fearlessly. His background spans real-time streaming, lakehouse architectures and event-driven ingestion into Snowflake, and he pairs strong Python craft with pragmatic design patterns that standardize APIs across organizations. An entrepreneurial communicator who once co-founded a widely distributed science magazine and gave a TEDx talk, he brings rare breadth across data, product and developer experience.
11 years of coding experience
13 years of employment as a software developer
Bachelor's Degree Physics - Incomplete, Bachelor's Degree Physics - Incomplete at Universidade Federal do ParanáNon Degree Visiting Student at Electrical Engineering, Non Degree Visiting Student at Electrical Engineering at University of Pennsylvania
Portuguese, English
Stackoverflow
176reputation
90kreached
13answers
1question
Github Skills (126)
typescript10
cloud-infrastructure10
poc10
container-image10
cloud-development-kit10
aws10
aws-ecs10
infrastructure-as-code10
aws-security9
data-engineering9
r9
static-analysis9
faker9
julia9
vulnerabilities9
Programming languages (9)
Github contributions (5)
catenaclearing/catena-actions
Feb 2025 - May 2026
Contributions:15 reviews, 12 PRs, 36 pushes in 1 year 3 months
Real-Life-IaC/ch-implementing-cicd
Jan 2024 - Dec 2024
Code for the Implementing CI/CD chapter
Contributions:2 reviews, 6 PRs, 29 pushes in 11 months
cicd
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