Welcome 👋
My name is Wilmer Zuna.
I'm a Mid-Level Software Engineer building distributed backend systems focused on authentication workflows, scalable REST APIs, and production-grade microservices.
I earned my M.S. in Computer Science (Systems) and B.S. in Computer Science (Human-Computer Interaction) from Stanford University.
Check out my professional history below.
You can also access it via my Resume.
I'm a Mid-Level Software Engineer building distributed backend systems focused on authentication workflows, scalable REST APIs, and production-grade microservices.
I earned my M.S. in Computer Science (Systems) and B.S. in Computer Science (Human-Computer Interaction) from Stanford University.
Check out my professional history below.
You can also access it via my Resume.
Experience
Mastercard — Software Engineer II
Feb 2026 – Present
- Architect and maintain Java Spring Boot microservices handling merchant authentication and admin logging workflows, processing 1,000+ transactional events daily across dev, staging, and production environments.
- Design REST API contracts and relational database schemas to support scalable backend systems, and lead design reviews to ensure adherence to architectural standards.
- Act as release owner for production deployments, coordinating cross-functional teams, investigating live-site issues, and ensuring reliable system rollouts across environments.
Mastercard — Software Engineer I
Aug 2024 – Jan 2026
- Designed and implemented a Kafka-based distributed communication system enabling merchant enrollment workflows for 5,000+ merchants, owning architecture, testing strategy, and deployment coordination.
- Developed and enhanced high-throughput RESTful APIs using Java and Spring Boot, collaborating in an Agile distributed team model with cross-functional stakeholders.
- Participated in design and code reviews to uphold maintainable, reliable, and architectural standards across services.
Robinhood — Software Engineer Intern
Jun 2023 – Sep 2023
- Designed and implemented Plaid identity update automations to expedite instant account verifications.
- Developed backend services using Python, Django, and Kafka supporting identity verification workflows impacting ~2M+ users.
Robinhood — Software Engineer Intern
Jun 2022 – Sep 2022
- Created a Full-Stack UI platform for internal engineers to view and manage investment orders.
- Built backend services in Go, Kubernetes, Postgres and Kafka to set up order transaction communication. Frontend implemented using React.
Projects
Personal Infrastructure Server
Aug 2024 – Present
- Maintain a self-hosted Linux server running 8-12 Docker containers orchestrated via Docker Compose, managing networking, DNS resolution, VPN configuration, and service reliability.
- Troubleshoot container failures, optimize resource allocation, and maintain reproducible service configurations.
Pintos Operating System
Jan 2023 – Mar 2023
- Implemented thread synchronization, priority scheduling, virtual memory management, and indexed file systems in an instructional x86 operating system using C++.
Programming Skills
Languages: Python, Java, Go, C++, C, SQL, JavaScript
Technologies: React, Node, Docker, Spring Boot, Kafka, Angular, Webhooks, Django
Teaching
As a graduate student at Stanford University, I served as a Course Assistant for:
- CS111 (09/23 – 06/24): Operating Systems Principles
As an undergraduate, I served as a Section Leader for:
- CS106B (03/21 – 06/23): Programming Abstractions
- CS106A (03/21 – 06/23): Programming Methodology