01Financial simulator · Web app
GrowCalc
I built GrowCalc to see how savings, withdrawals, inflation, and returns could affect a portfolio over time.
Open GrowCalc
Senior software engineer / San Diego, CA
I build software
people rely on.
I'm Onel, a senior software engineer at Gravity Payments. I work on applications, APIs, automated testing, and cloud services.
01 / Projects
A few things I've made
A portfolio calculator, a Bitcoin ETF tracker, and an Android journal app.
02Data product · Web app
Bitcoin ETFs Tracker
I wrote a Python job to collect Bitcoin ETF stats on a schedule, then built a small Next.js site to browse them.
Open the tracker
03Android app · Personal project
MyJournal
MyJournal is an Android app I made to track daily moods and satisfaction, with charts to look back over time.
View MyJournal on GitHub
02 / Experience
Experience & education
I lead fintech product delivery at Gravity Payments, from system design through launch.
Jan 2025 — Present
Senior Software Engineer
Gravity Payments
I build AWS services and React/Express apps, with CI/CD, monitoring, and automated testing.
Education
B.S. in Computer Science
University of California, San Diego
Coursework included software engineering, machine learning, data structures, cryptography, and database systems.
03 / A little more
Outside of work
I like traveling, spending time in nature, playing sports, and being with my family.
Languages & frameworks
- TypeScript
- JavaScript
- Python
- SQL
- React
- Node.js
- Express
- Serverless
Cloud & delivery
- AWS
- IAM
- Lambda
- EC2
- ECS
- DynamoDB
- RDS
- Step Functions
- SQS
- EventBridge
- S3
- Cognito
- SES
- KMS
- Docker
- Infrastructure as code
- GitHub Actions
- CI/CD
- Datadog
- CloudWatch
Quality & integrations
- Jest
- Playwright
- Cypress
- Postman
- Mocha
- PyTest
- Appium
- XCUITest
- Salesforce
- jsforce
- Plaid
- REST APIs
04 / Contact
Get in touch
Feel free to reach out. I'm happy to connect.