Open to opportunities

Andrew Geldean

@andrewgeldean

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Senior software engineer specializing in cloud, security, and scalable systems.

United States

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What I'm looking for

I seek roles where I can architect scalable, secure cloud systems, mentor engineers, and deliver measurable performance and reliability improvements in collaborative, agile teams.

I am a Senior Software Engineer with 7+ years building scalable, secure systems across identity management, payment processing, and enterprise security. I specialize in systems design, microservice architecture, cloud platforms, and integrating machine learning to improve detection and performance.

At Amazon I led and contributed to high-throughput authorization frameworks and identity infrastructure, optimizing latency, storage, and anomaly detection while ensuring compliance with SOC 2 and GDPR. I have hands-on experience with Java, Python, Spring Boot, AWS services, Kubernetes, and modern frontend stacks.

I enjoy mentoring engineers, improving operational observability, and delivering measurable business impact through performance tuning, secure integrations, and data-driven feature development.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Development Engineer

Current

Amazon

Oct 2024 - Present (1 year 3 months)

Led design and implementation of scalable Java/Spring Boot authorization frameworks handling 100M+ daily access requests and reduced decision latency by 30%; mentored 5 engineers and improved code review efficiency by 15%.

Java Spring Boot AWS Lambda DynamoDB Cedar Policy Language OAuth 2.0 SAML Amazon SageMaker Microservices Identity Management

Software Development Engineer

Amazon

Jul 2021 - Oct 2024 (3 years 3 months)

Built core components of large-scale identity infrastructure using Python and AWS Kinesis to support billions of annual requests, implemented RBAC/ABAC enabling scaling to 50,000+ RPS and reduced MTTD by 35% via monitoring.

Python AWS Kinesis Kubernetes RBAC Prometheus Grafana Cloudwatch Distributed Systems

Software Development Engineer

Amazon

Sep 2018 - Jul 2021 (2 years 10 months)

Engineered React-based payment interfaces and secured backend services processing billions in annual transactions, improved page load times by 20% and increased conversion rates by 10% through A/B testing.

React JavaScript Redux Express PCI DSS A B Testing Cypress Amazon CloudFront

Software Engineering Intern

S&C Electric Company

May 2017 - Aug 2017 (3 months)

Authored Python testing tools for Zigbee and Wi‑Fi smart grid systems automating 500+ test cases and reduced manual testing effort by 80%; debugged C++ connectivity modules to improve reliability.

Python C++Embedded Systems GDB Valgrind Test Automation Zigbee Matlab

Education

Degrees, certifications, and relevant coursework

University of Illinois at Urbana-Champaign

Bachelor of Science, Computer Engineering

2014 - 2018

Completed a Bachelor of Science in Computer Engineering with coursework and projects focused on embedded systems, software engineering, and networking.