Hi, I'm

William Zinkann

Full-Stack Engineer & Problem Solver

Full-Stack Engineer with expertise in Java and Spring Boot, experienced in developing high-performance applications. Demonstrated success in optimizing APIs and enhancing application performance using core Java, RESTful services, and SQL.

View My Work View Resume Get In Touch

About Me

I'm a passionate Full-Stack Engineer with expertise in Java and Spring Boot, experienced in developing high-performance applications. I have a proven track record in implementing scalable solutions and streamlining CI/CD pipelines within enterprise environments.

Experienced in designing and developing enterprise-level Java-based APIs and backend systems at Blue Cross Blue Shield of Massachusetts, with a focus on secure operations, efficient data management, relational databases, and CI/CD pipelines.

Resume

William Zinkann

Full Stack Engineer

Full-Stack Engineer with expertise in Java and Spring Boot, experienced in developing high-performance applications. Demonstrated success in optimizing APIs and enhancing application performance using core Java, RESTful services, and SQL. Proven track record in implementing scalable solutions and streamlining CI/CD pipelines within enterprise environments.

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PDF Resume

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Work Experience

Full-Stack Engineer

Blue Cross Blue Shield of Massachusetts Jul 2023 - May 2025

Designed and developed enterprise-level Java-based APIs and backend systems using core Java, Spring Boot, and Hibernate, ensuring secure operations and efficient data management while leveraging relational databases and CI/CD pipelines.

  • Optimized API performance and security by refining Apigee proxies, achieving a 25% improvement in response times
  • Utilized containerization tools including Docker, Kubernetes, OpenShift, and VMware Tanzu for streamlined deployment
  • Implemented CI/CD methodologies with Jenkins, Maven, Jira, ServiceNow, and GitLab
  • Managed data storage across Oracle, PostgreSQL, and DynamoDB with efficient schemas and performance tuning

API and EDI Enrollment Intern

Blue Cross Blue Shield of Massachusetts Jun 2022 - Aug 2022

Supported the architecture, development, and modernization of enterprise APIs and EDI solutions, contributing to cross-functional integration and cloud migration initiatives.

  • Collaborated with Agile Integration team to design enterprise-wide API solutions using Java and Spring Boot
  • Developed API and EDI applications ensuring clean, scalable, and well-documented code
  • Assisted in modernizing EDI transactions by migrating services to AWS Cloud
  • Engineered email REST API service for SMTP.

Skills & Technologies

Programming Languages

Java Python

Frameworks & Technologies

Spring Boot Hibernate/JPA RESTful APIs Microservices React Node.js

Databases & Cloud

SQL Oracle PostgreSQL DynamoDB AWS

DevOps & Tools

Docker Kubernetes Jenkins Git/GitLab Maven/Gradle CI/CD

Featured Projects

Baseball Game Outcome Prediction Model

Developed a modular pipeline to predict Major League Baseball outcomes using statistical features and machine learning techniques. Built multiple predictive models including logistic regression, random forests, and ensemble learners.

Python Pandas scikit-learn Machine Learning
Code

NFL Data API & Prediction App

Built a full-stack NFL data platform with FastAPI backend providing real-time game schedules, live betting odds from 8+ sportsbooks, and smart weekly caching. Frontend React app displays current week games with team logos and betting data. Features include custom integration, cost-optimized caching, and production deployment on Render and Vercel.

FastAPI React Python TypeScript
Code Live

Full Stack RESTful API Patient Tracker

Developed a comprehensive patient tracking application with Spring Boot backend, MySQL database, and React frontend. Features include API testing with Postman and cloud hosting on ClearDB supporting thousands of records.

Spring Boot React MySQL RESTful API
Code

Get In Touch

Let's work together

I'm always interested in new opportunities and exciting projects. Feel free to reach out!

wzinkann@gmail.com
978-727-3737
Boston, MA