Open to opportunities

David Zhang

@davidzhang2

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Senior software engineer building scalable, cost-efficient platforms across adtech, CRM, and fintech.

United States

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What I'm looking for

I seek engineering roles building scalable, data-driven platforms where I can lead architecture, mentor teams, and improve performance and cost-efficiency.

I am a Senior Software Engineer with 9+ years building large-scale platforms across advertising technology, CRM/enterprise software, and fintech.

I have led full lifecycle development for high-throughput systems—designing microservices in Java and Go, introducing Kafka streaming, and migrating services to serverless and container platforms to cut costs and improve reliability.

I build data and ML solutions using Python, AWS SageMaker, Glue and Spark to optimize targeting and analytics, driving measurable improvements in relevance, latency, and campaign performance.

I mentor engineers, drive cross-functional collaboration with product and data teams, and prioritize observability, compliance, and operational efficiency to deliver products used by millions.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Amazon

May 2020 - Aug 2025 (5 years 3 months)

Directed the Sponsored Products Optimization Platform processing 1B+ daily impressions with 99.99% uptime; reduced ad delivery latency by 30% and improved CTR by 15% through high-performance microservices and ML-driven targeting.

Java Go Python AWS Lambda Sagemaker EKS Apache Kafka Spark React Kubernetes Docker

Senior Software Engineer

Salesforce

Sep 2017 - May 2020 (2 years 8 months)

Led design and delivery of bidirectional CRM data sync services and high-throughput ETL pipelines, synchronizing 750k+ records with 99.9% integrity and reducing latency to under 3 seconds for payment events.

Python Pandas Jenkins Docker GCP)Prometheus GCP

Software Engineer

Itexus

Jun 2016 - Aug 2017 (1 year 2 months)

Designed secure C#/.NET APIs and Azure security policies for fintech clients, improving access control and PCI DSS compliance while delivering real-time financial dashboards that increased interaction speed by 30%.