# Tiziana Sellitto

> Staff Software Engineer at PayPal/Braintree

Location: San Jose, California, United States
Profile: https://flows.cv/tiziana

Self-driven experienced Software Engineer with experience in web applications backend and services and payment processing

Looking to leverage my expertise as Ruby and Java Software Engineering

I'm a good team player and have a strong sense of ownership

Main working language/framework: Java, Ruby, Ruby on Rails, Spring Boot

## Work Experience
### Staff Software Engineer @ PayPal
Jan 2025 – Present

### Member of Technical Staff 1 @ PayPal
Jan 2023 – Jan 2026 | San Jose, California, United States

### Senior Software Engineer @ PayPal
Jan 2020 – Jan 2023 | Sunnyvale, California, United States
Working on network tokenization card provisioning and processing on Braintree by PayPal, improving merchants authorization rate on card transactions

Worked on certification processes with major processors (FirstData and Chase) for network tokenization transaction;

Enhanced and optimized code quality  and mentored junior engineers

Technologies: Ruby, Ruby on Rails, Java 8, Spring Boot, GraphQL, REST API, Google Protobuf, PostgreSQL, Microservices Architecture

### Software Engineer @ Western Union
Jan 2018 – Jan 2020 | San Francisco
Migrated and refactored a legacy distributed Java application to modern Spring Boot. The newly migrated application helped the company to cut costs  by leveraging a faster development experience and an overall more scalable technology stack

Engineered and implemented a RESTful web-based application with Spring Boot to generate and validate signed and encrypted JSON Web Tokens (JWT) to secure the communication between Western Union and Partner systems

Technologies: Java 8, Spring Framework, Spring Boot, REST/SOAP API, Oracle 11g, Hibernate, JSON Web Tokens

### GNOME Outreach Program For Women Internship @ Mozilla Corporation
Jan 2013 – Jan 2013 | Italy
Worked on debugging and triaging processes for Mozilla Firefox “bugzilla.mozilla.org”.  Involved in the organization of the official “Triage & Test Days” with firefox community. 

Contributed to the engineering community on UI tweaks for the HTML5 full-screen APIs and other related processes individually executed the designing and implementation of a new Firefox web add-on that provided additional support to the bugmasters community.


http://www.tizianasellitto.it/blog/?p=128 For a summary of the experience

### Software Engineer @ Proxima Informatica Spa
Jan 2010 – Jan 2013 | Rome Area, Italy
Developed a web application for monitoring solvency and liquidity profile of the Italian Banking institution Banca di Credito Cooperativo consortium; 

Supported the internal batch processes by engineering a web application, on both front-end and back-end, to gather data to evaluate and classificate risks using statistical metric and take appropriate corrective actions.

Tech Stack: Java, Spring, Oracle 11g and PL/SQL, Hibernate, MyBatis, iReport and JasperReports for PDF and Excel reports. JSF, ICEfaces.

### Dotnet Developer @ Mate Consulting
Jan 2004 – Jan 2005
Worked on analyzing and developing  an internal .NET CRM for my BSc thesis. 

Made significant experience with real-world software engineering practices including documentation, UML modeling, product life-cycle.


## Education
### M.Sc. in Computer Science
Università degli Studi di Salerno

### B.Sc. in Computer Science
Università degli Studi di Salerno


## Contact & Social
- LinkedIn: https://linkedin.com/in/tizianasellitto
- Portfolio: http://www.tizianasellitto.it/blog/
- GitHub: https://github.com/tizianasellitto

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Source: https://flows.cv/tiziana
JSON Resume: https://flows.cv/tiziana/resume.json
Last updated: 2026-04-12