**Leonard Polzin**
Full Stack Engineer
Cadott, WI 54727
leonardpolzinbco56_hiy@indeedemail.com
+1 (469) 902-8969

### **Professional Summary**
Experienced Full Stack Developer with 5+ years of expertise in building scalable web applications and managing the full software development lifecycle. Proficient in adopting new technologies and delivering user-centric solutions. Thrives in collaborative environments focused on innovation and growth.

**Authorized to work in the US for any employer.**

### **Work Experience**

**Mobile Application Developer** – *Zuri Fertility* (https://www.zurifertility.com/)
- Developed and launched the first version of a mobile app in 5 months, implementing 25+ features.
- Ensured high-quality UX, laying a foundation for future development.
**Stack:** React Native, Node, Firebase, Postgres, Heroku

**Frontend Developer** – *20 Miles* (https://20miles.us/)
- Boosted feature development efficiency by 20% through scalable, modular code.
- Delivered 25+ new features in 4 months.
**Stack:** React, ANTD, AM Charts, Ruby on Rails

**Full Stack Developer** – *PacDocSign* (https://pacdocsign.com/)
- Improved backend efficiency by 30% via enhanced database design and microservices.
- Built dynamic React components, increasing frontend productivity by 25%.
**Stack:** React, Node, Typescript, Firebase, MySQL, Microservices, GCP

**Full Stack Developer** – *Pledje* (https://pledje.com/)
- Optimized software performance by 50% and resolved 90% of known bugs.
- Enhanced UI for better user experience.
**Stack:** React, Node, Firebase, Contentful, Redis, Payment Gateway

**Frontend Developer** – *DSL* (https://www.genevamedia.com/)
- Improved UI/UX and fixed critical bugs, boosting app performance by 20%.
**Stack:** React, BeanstalkApp, AWS

**Frontend Developer** – *DesignAShirt* (https://www.designashirt.com/)
- Modernized legacy features, increasing user reach by 35%.
- Fixed 90% of known bugs, improving UX.
**Stack:** React, Node, AWS, FabricJS

**Full Stack Developer** – *USA Printing* (https://www.usaprintingtrade.com/)
- Optimized a critical feature, improving performance by 100%.
**Stack:** Next, Node, Firebase, MongoDB, Microservices, Redis, Payment Gateway, GCP

### **Education**
**Master’s in Computer Science** – *Michigan State University* (2014–2016)
**Bachelor’s in Computer Science** – *University of Wisconsin-River Falls* (2007–2011)

### **Skills**
**Frontend:** React, Next.js, Angular, Vue.js, Redux, Tailwind, HTML5/CSS3, SASS/LESS, jQuery
**Backend:** Node.js, Express, Ruby on Rails, .NET, C#, Golang, Python, PHP, Spring Boot
**Databases:** MySQL, Postgres, MongoDB, Firebase, Redis, SQL/NoSQL
**Cloud & DevOps:** AWS, GCP, Heroku, CI/CD, Docker, Kubernetes, Microservices
**Tools:** Git, GitHub, Jest, Webpack, Figma, Kafka, Elastic Search

### **Certifications**
- Google Analytics Certification
- CompTIA A+
- Driver’s License

### **Links**
- http://megasafe.com/
- https://clinicalenterprise.com/
- https://mangiabiz.com/
- https://rudis.com/
- https://www.cancertutor.com/
- https://www.leo-dev-works.com/

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