# Jun Jeong

> Software Developer

Location: San Francisco, California, United States
Profile: https://flows.cv/junjeong

Software Developer

Result-oriented and collaborative IT Professional with proven experience in software engineering, database programming, and Web programming. Appreciates challenges, steep learning curves, and high pressure deadlines. Outstanding ability to analyze, develop, and implement technology solutions. Reliable team player with strong problem-solving and object oriented development skill.

Specialties: php, python, golang, REST API, mvc, yii, javascript, ajax, jquery, Apache, Nginx, .net, asp, css, data migration, database modeling, database programming, sql performance tuning, e - commerce, Amazon AWS, linux, unix, c, c#,  mysql, Oracle, Oracle pl/sql, pro* c, pascal, csv, t-sql, unix, unix shell scripting, xml, json, soap, payment gateways, internationalization

## Work Experience
### Principal Software Engineer @ Mastercard
Jan 2019 – Present | San Francisco, California, United States
Design and develop Priceless platform using Linux, Apache/NginX, MySql (Global Multi-master replication, Amazon Aurora), PHP (Yii - MVC Framework), Go, Python, JavaScript (jQuery, React), AWS (S3, CloudFront, System Manager, Secrets Manager, CloudWatch, KMS, CloudHSM), JIRA, and Git
- Design Database Architecture (Multi Master Replication, Amazon Aurora, Redis)
- Frontend UI with php, html, css and javascript
- Backend processes and cron jobs
- Analytical Reporting and ETL
- Internationalization (40+ languages and 60+ currencies)
- REST and gRPC API
- Handling PII data on PCI compliance environment
Integrated APIs for payment gateways (Stripe, MPGS, PayPal, Braintree, Adyen), digital wallets (ApplePay, GooglePay, Click2Pay), social networks (Google, Facebook, Twitter), and shipping companies (Fedex, UPS, USPS)
- Content ingestion from various providers 
- AI technologies for search and translation

### Lead Software Developer @ IfOnly
Jan 2012 – Jan 2019 | San Francisco, California, United States
Developing Website and Web application using Linux, Apache/NGINX, MySql, PHP (Yii - MVC Framework), JavaScript (jQuery, Angular), JIRA, and SVN.
- Frontend UI with php, html, css and javascript
- Shopping cart and checkout with Promotions and Gift Certificates
- Backend admin site and cron jobs
- Internationalization
Integrated APIs for payment gateways (Braintree, PayPal, CyberSource, Stripe), social networks (Facebook, Twitter),  and shipping companies (Fedex, UPS, USPS)

### Software Developer @ Mintbox
Jan 2010 – Jan 2012 | Foster City, CA
Developing Website and Web application using MySql, PHP (Yii -  MVC Framework), JavaScript (jQuery) and SVN as a revision control system.

### Lead Developer @ Tano Digital
Jan 2009 – Jan 2010
A software consulting company offering software development, web design, and system management. 

Designed, developed and implemented web based applications using latest web technologies such as AJAX, jQuery, Smarty and CSS
- Back-end management system for e-commerce web applications
- Front-end e-commerce web applications
Applied Paypal, Amazon and Google API to web sites and applications
Performed database modeling, programming and tuning for the web applications using Stored Procedures, Jobs, Functions, Views, Indexs, and Triggers

### Lead Developer @ N-Trias, Inc
Jan 2006 – Jan 2008
A software consulting company offering software development, web design, and software integration.

Designed, developed and implemented web based applications 
- Project management system for make-to-order manufacturing industry (Quote, Sales, Invoice, PO, Task, Shipping, and Etc.) 
- User participating e-commerce web site and its back-end management system
Developed front-end user interactive module of  image search engine
- Developed a windows application to send user's intend (query image) to the image processing server by capturing images on user's screen and to receive images as results from image search with its information
- Developed image retrieve module to respond the user's request
Performed data migration, database modeling, database programming and performance tuning

### Lead Developer @ NexxIT, Inc
Jan 2001 – Jan 2005
An independent software vendor developing CASE software and offering software development, and software integration.  

Debugged, upgraded and finalized existing web based Project Management System (SaaS type application)
Designed, and developed an application and database migration project from Delphi (Interbase) to.NET (SQL Server) for a department of San Mateo County, CA
Performed database modeling, programming, performance tuning and data migration
Managed and coordinated product development team
- AppMentor: database-driven template-based Visual Basic code generator
- COBOL Analyzer: Business Logic Extractor with various graphical user interfaces
- Enhanced the product quality to the global product level to minimize dependency of the technical support with intuitive user interface and help system.
Developed a database administrating application for a Multi-dimensional Datawarehouse
Managed programming standards on business logic, GUI and database


## Education
### Master of Science in Industrial Information (Data Warehouse)
Yonsei University

### Bachelor of Business Administration in International Trade
Chung-Ang University


## Contact & Social
- LinkedIn: https://linkedin.com/in/jun-jeong-59005421

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