David Zhang
@davidzhang2
Senior software engineer building scalable, cost-efficient platforms across adtech, CRM, and fintech.
What I'm looking for
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
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.
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.
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%.
Education
Degrees, certifications, and relevant coursework
Baldwin Wallace University
Bachelor’s Degree in Computer Science, Computer Science
2012 - 2016
Completed a Bachelor’s Degree in Computer Science, focusing on software development and systems engineering.
Tech stack
Software and tools used professionally
Postman
AWS Glue
D3.js
GitHub
Kubernetes
Jenkins
CircleCI
GitHub Actions
Salesforce
React Native
Pandas
MySQL
PostgreSQL
MongoDB
Cassandra
Shopify
Gmail
Node.js
Django
Spring Boot
Next.js
.NET
Redis
Terraform
JavaScript
Java
scikit-learn
Kafka
FastAPI
Grafana
Prometheus
PayPal
Datadog
Heroku
GraphQL
gRPC
Elasticsearch
AWS Lambda
Serverless
SQL
NgRx
Playwright
Availability
Location
Authorized to work in
Job categories
Skills
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