# Chastine Grace De Leon

> Staff Software Engineer at Slack

Location: San Mateo, California, United States
Profile: https://flows.cv/chastine

Java backend software engineer. Technologies I work with include Spring, MongoDB, MySQL, and RESTful web services. I love writing clean and readable code that's highly maintainable. I bake a mean chocolate cake too.

## Work Experience
### Staff Software Engineer @ Slack
Jan 2019 – Present

### Staff Software Engineer @ Pandora
Jan 2019 – Jan 2019

### Senior Software Engineer @ Pandora
Jan 2017 – Jan 2019

### Senior Software Engineer @ Makeup Depot
Jan 2016 – Jan 2017 | Santa Clara, CA
- Implemented Spring-Data-REST and Lombok to reduce overall codebase by ~30% for internal inventory system for an online beauty and skincare purveyor.
- Architected backend web service that allows owners to manage inventory, orders, pricing and cash flow that combine multiple currencies (USD and Php).
- Enabled HATEOAS and painless API documentation using Swagger to facilitate smoother client integration.

### Senior Software Engineer @ Adchemy (acquired by WalmartLabs)
Jan 2011 – Jan 2014 | Foster City, California
- Developed a feed management gateway service using Java, Spring, MongoDB and RabbitMQ for uploading over 3 million unique products across 20 categories and 6 clients to Google Merchant Center.
- Optimized software development time by > 15% through creating 10+ RESTful API methods to supplement existing Java and Spring backend modules as part of service-oriented architecture redesign.
- Maintained 100% uptime of Google AdWords and Bing Ads internal publishing services with Java, ensuring changes to Required Minimum Functionalities (RMFs) were met and third-party API issues were avoided.
- Led team of 7 engineers through scrum agile development, with 2 week sprints and Git for version control.
- Followed test driven development (TDD), achieving ~85% code coverage writing 300+ unit tests with JUnit.
- Recognized in < 1 year with “Play to Win as a Team” Living Our Values award (top 4% of the company) shortly after promotion to Senior Software Engineer.

### Software Engineer 3 @ J.B. Hunt Transport (Remote)
Jan 2008 – Jan 2011 | Lowell, AR
- Engineered using Java, Spring and JSF efficient feature requests for 6 rating, pricing and billing systems which greatly increased customer satisfaction and optimized billable hours for outside contractors by over 10%.
- Saved the company thousands of dollars by proposing and implementing the use of open-source Java Native Access to extract critical data from a third-party mileage application, which was otherwise unavailable.
- Streamlined user invoicing process by 15 - 20% through constructing 2 major pages (from UI to backend) that merged the rates and bills procedures with Java, Spring, and DB2.
- Proactively collaborated with users, QA engineers, and other stakeholders during development lifecycle, while adhering to strict guidelines for documentation and processes, reducing turnaround time by ~20%.


## Education
### Master of Information Systems
University of the Philippines

### Bachelor in Business Administration in Information Technology
Southville Foreign University


## Contact & Social
- LinkedIn: https://linkedin.com/in/chastine-deleon

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