David Gucwa, Developer in Tewksbury, MA, United States
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David Gucwa

Verified Expert  in Engineering

Full-stack Developer

Location
Tewksbury, MA, United States
Toptal Member Since
July 23, 2020

David began programming computers at the age of five, after his father brought home a Commodore VIC-20. It quickly became a fascination, later a hobby, and eventually a career. David is now a web developer with over 15 years of work experience and a member of American Mensa. He takes pride in his code's organization, elegance, and efficiency, and in his ability to solve problems creatively. David feels comfortable coding for basically any project -- he's been doing it his entire life.

PHPMySQLGitREST APIsPHP 7JavaScriptCSSPhpStormHighchartsAlgorithmsBack-endFront-endFull-stackDatabasesJava

Portfolio

SurfMerchants
jQuery, JavaScript, CSS, HTML, MySQL, PHP
ConnectU
Smarty, HTML, MySQL, PHP
Genevate
HTML, MySQL, PHP

Experience

PHP - 18 yearsMySQL - 18 yearsUnix Shell Scripting - 15 yearsAPIs - 5 years

Availability

Part-time

Preferred Environment

SQL, PHP, Unix

The most amazing...

...product I've created is a reporting platform built from scratch to handle the needs of thousands of major clients, including McDonald's, TD Bank, USPS, and BP.

Work Experience

Senior Developer

2006 - 2020
SurfMerchants
  • Designed and built a customizable reporting platform for customer survey data, handling tens of millions of database records and used by major international clients, including USPS, TD Bank, Google, and BP.
  • Led a team of six LAMP developers in maintaining our product's code and adding new features.
  • Wrote deep analytic tools to help clients better understand their data.
  • Integrated our product with multiple third-party REST APIs.
  • Built internal tools to make our own teams more productive.
  • Upgraded tens of thousands of lines of code in our legacy product to be PHP 7 compliant.
  • Optimized our code and database as needed to handle user requests in minimal time.
Technologies: jQuery, JavaScript, CSS, HTML, MySQL, PHP

Developer

2005 - 2005
ConnectU
  • Added functionality to our social networking platform.
  • Maintained and optimized our product's MySQL databases.
  • Implemented a security system for online transactions.
Technologies: Smarty, HTML, MySQL, PHP

Developer

2004 - 2004
Genevate
  • Built a content management system for commercial websites.
  • Established and maintained several databases using MySQL.
  • Created reusable HTML templates for our content management system.
Technologies: HTML, MySQL, PHP

Dragon Reporting

https://site.sassieshop.com/reporting/dragon/
This is a reporting platform built from scratch to meet the growing needs of our thousands of clients, providing both real-time and periodically distributed reports of client data across dozens of database tables containing tens of millions of records. I was the sole developer and spent over five years growing the product with an eye on efficiency, the user experience, and well-organized code.

Languages

PHP, PHP 7, HTML, CSS, JavaScript, Java, Python, SQL

Libraries/APIs

REST APIs, Highcharts, jQuery, React, Stripe Connect API, Stripe Connect

Tools

Git, PhpStorm, Stripe Checkout

Storage

MySQL, Databases

Other

APIs, Algorithms, Unix Shell Scripting, Reporting, Optimization, Mathematics, Back-end, Front-end, Full-stack

Frameworks

Twig, Laravel, CodeIgniter, Symfony, Smarty

Platforms

Unix, Amazon Web Services (AWS)

2000 - 2004

Bachelor of Science Degree in Computer Science

University of Massachusetts at Amherst - Amherst, MA, United States

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