Open to opportunities

Andrew Zollman

@andrewzollman

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Senior Full-Stack Engineer specializing in Ruby on Rails backend and React frontend.

United States

Message

What I'm looking for

I seek senior engineering roles where I can lead backend architecture, mentor teams, and deliver secure, scalable systems in a collaborative, product-focused environment.

I am a Senior Full-Stack Engineer with over 10 years building robust, scalable, and secure systems for enterprise and consumer-facing platforms. I focus on backend architecture with Ruby and Ruby on Rails while delivering modern frontend experiences using React.

At Braze I integrated GPT-4 for AI-driven content, led backend architecture for a custom ERP, improved operational throughput by 35%, and increased test coverage by over 40% while mentoring junior engineers. Previously, I built core services and GraphQL APIs at Presto and contributed to large-scale backend and frontend systems at Uber.

I prioritize clean, testable code, iterative product development, and strong cross-functional collaboration, and I bring deep experience in cloud deployments, observability, and security best practices to deliver measurable business impact.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack Engineer

Current

Braze

Mar 2021 - Present (5 years 3 months)

Led backend architecture and integrations for a custom ERP and logistics workflows using Ruby on Rails and PostgreSQL, improving operational throughput by 35% and increasing test coverage by 40%. Implemented AI-driven content generation via OpenAI API and built React admin portals to streamline technician routing and dashboarding.

Ruby on Rails React PostgreSQL Sidekiq Redis AWS Docker Terraform OpenAI API

Senior Software Engineer

Presto

Sep 2017 - Mar 2021 (3 years 6 months)

Designed and built core backend services and GraphQL APIs for order management and tablet ordering, migrated services to AWS EKS reducing downtime by 60%, and developed ML-driven recommendation engines to increase per-order revenue.

Ruby GraphQL Terraform CI CD Python Machine Learning

Senior Software Engineer

Uber

Apr 2014 - Sep 2017 (3 years 5 months)

Contributed to backend services for Eats order processing and payment reconciliation, refactored onboarding and analytics pipelines to be event-driven, and created shared React frontend libraries to improve UI consistency and performance.

Ruby React Kafka Event Driven Architecture Distributed Systems Payments Monitoring

Software Engineer

Uber

Apr 2013 - Apr 2014 (1 year)

Built and maintained large-scale dashboards and frontend tooling in React and Node.js, integrated real-time Kafka metrics into time-series systems, and developed modular charting components for internal analytics.

React Node Kafka D3 Plotly