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Duncan Irungu Mwangi
Verified Expert in Engineering
Web Developer
Nairobi, Kenya
Toptal member since April 26, 2022
Bio
Duncan has spent his professional career working as a remote developer on challenging projects. He is experienced in developing consumer-focused web applications using PHP, Laravel, React, WordPress, and JavaScript and building products for clients. Duncan is focused on meeting the highest standards for application development, user experience, best practices, usability, and performance. He will be a great asset to any company.
Portfolio
Pinpointe On-Demand, Inc
PHP, JavaScript, LAMP, MySQL, API Integration, JSON, MongoDB, eCommerce
Axiomatic Technology Ltd
Laravel, Full-stack, HTML, PHP 7, PHP, JavaScript, CSS
Prospect Portals
Laravel, PHP, MySQL, JavaScript, WordPress, APIs, Zapier, SQL, RDBMS...
Experience
- CSS - 12 years
- PHP - 12 years
- HTML - 12 years
- JavaScript - 10 years
- jQuery - 9 years
- WordPress - 8 years
- Laravel - 6 years
- React - 2 years
Preferred Environment
PHP, Laravel, JavaScript, WordPress, React, APIs, Authorize.net, Stripe API, PayPal API, MySQL, API Design
The most amazing...
...applications I've developed are the solar franchise management system, the documents management system, and the CRM for a CPA firm.
Work Experience
Senior Development Engineer
2023 - PRESENT
Pinpointe On-Demand, Inc
- Led the development and optimization of APIs, webhooks, and connectors for various applications.
- Collaborated closely with the front-end team, ensuring back-end support aligned with front-end functionalities.
- Played an instrumental role in integrating top eCommerce platforms through APIs and connectors.
Technologies: PHP, JavaScript, LAMP, MySQL, API Integration, JSON, MongoDB, eCommerce
Full-stack Laravel Developer
2022 - PRESENT
Axiomatic Technology Ltd
- Designed and implemented the overall web architecture using Laravel.
- Constructed a REST API (the specification is complete) to access an existing MySQL database.
- Integrated the front-end UI with new and existing API.
Technologies: Laravel, Full-stack, HTML, PHP 7, PHP, JavaScript, CSS
Senior Software Engineer
2020 - PRESENT
Prospect Portals
- Implemented complex lead flow automation for businesses.
- Developed a customer relationship management (CRM) system for clients' businesses.
- Developed and implemented application integrations using Zapier.
- Worked on the implementation and maintenance of REST APIs.
- Integrated payment processors, such as Stripe, Authorize.net, and PayPal.
Technologies: Laravel, PHP, MySQL, JavaScript, WordPress, APIs, Zapier, SQL, RDBMS, Web Development, REST, Testing, jQuery, Stripe API, Facebook API, Authorize.net, PayPal API, React, JSON Web Tokens (JWT), API Design
Back-end API Developer
2022 - 2022
ROSETTA.AI HOLDING PTE. LTD.
- Built a recommendation system for the fashion industry.
- Built RESTful APIs using Laravel to integrate with AI modules.
- Implemented a payment system using Stripe API.
Technologies: Laravel, PHP, API Design, Kubernetes
Senior Software Engineer
2021 - 2021
Tumblr
- Generated different discrepancy reports in various formats for the ad analytics team.
- Aggregated data from different data sources, including Apache Hive, Apache Druid, and IPONWEB u-Slicer.
- Conducted the smart ad server integration using an API for sponsored post reporting.
- Troubleshot data analytics on active sponsored ads on posts across different platforms.
Technologies: PHP, Apache Kafka, Druid.io, SQL, RDBMS, PHP 7, Web Development, REST, Testing, API Design, Apache Druid
Senior Software Engineer
2019 - 2021
Elite Funds
- Created the Solar Franchisees' Platform, a Laravel-based system that manages franchisees' solar installation leads and projects.
- Built extensive custom WordPress plugins for the company's subsidiaries.
- Developed a hedge fund management system on Laravel and React.
- Developed an API for the hedge fund management system using Node.js, JavaScript, and Express.js.
- Installed and managed all company websites using WordPress.
- Managed and administered different company servers and websites.
Technologies: Laravel, React, Node.js, PHP, MySQL, JavaScript, SQL, RDBMS, PHP 7, Web Development, REST, Testing, APIs, Computer Science, CSS, Facebook API, Authorize.net, PayPal API, Stripe API, Linux, CentOS, HTML, HTML5, jQuery, LAMP, API Design
Senior Software Engineer
2014 - 2019
CannazALL
- Maintained 12 company and product websites and web applications built using WordPress and Laravel.
- Developed tens of custom WordPress and WooCommerce plugins to ease business operations.
- Managed the server and database for various company servers.
- Built RESTful APIs using Laravel, Node.js, and Express.js.
- Integrated payment processors, such as Stripe, Authorize.net, and PayPal.
Technologies: Laravel, PHP, MySQL, JavaScript, WordPress, WooCommerce, SQL, RDBMS, PHP 7, Web Development, REST, Testing, APIs, Authorize.net, jQuery, Stripe API, Facebook API, PayPal API, JSON Web Tokens (JWT), API Design
Freelance Software Engineer
2013 - 2014
Online Freelance Agency
- Worked for different clients and fulfilled their needs.
- Developed back-end applications using Laravel, CodeIgniter, WordPress, and JavaScript.
- Contributed to tasks ranging from small website applications and website fixes to full application development.
Technologies: JavaScript, PHP, MySQL, CodeIgniter, WordPress, WooCommerce, SQL, RDBMS, PHP 7, Web Development, jQuery, APIs, HTML5, HTML, API Design
Software Engineer
2012 - 2013
G-Mark Hosting
- Created WordPress plugins for different businesses to ease business workflow.
- Built Laravel web applications and RESTful APIs for remote clients.
- Provided web hosting support for our diverse clients. Developed different RESTful APIs using Node.js.
Technologies: JavaScript, PHP, MySQL, Node.js, SQL, RDBMS, Web Development, API Design
Web Developer
2011 - 2012
Twigahost Web Solutions LTD
- Developed web applications using PHP, MySQL, CodeIgniter, WordPress, JavaScript, jQuery, HTML, and CSS.
- Used WordPress management system to develop a website for a client.
- Developed an application for a client using the CodeIgniter framework.
Technologies: JavaScript, HTML, CSS, jQuery, PHP, MySQL, CodeIgniter, SQL, RDBMS, Web Development, API Design
Technical Field Officer
2006 - 2008
Equity
- Refreshed and maintained a server at the branch level daily.
- Maintained the intranet using WordPress, Joomla, and MySQL.
- Implemented and maintained digital signage at branches.
- Configured systems for various software applications.
- Ensured minimal system downtime at the branch level.
Technologies: MySQL, WordPress, Joomla, RDBMS, Web Development
Experience
Solar Franchisees' Platform
This Laravel-based system manages franchisees' solar installation leads and projects. It is a back end that franchise administrators, franchisees, and sales reps use to manage prospects, customers, and project information. It is integrated with several APIs, including geomapping APIs for franchise territory mapping. As a lead engineer, I developed the system.
Freedom Tax Portal
This is a Laravel-based subscription service for businesses to sign up for and find information about legal ways of saving on taxes. Business owners provide details about the nature of their business registration status, and the system offers suggestions on how to lower their tax bills. The system is created with the input of a certified public accountant (CPA) and tax attorney and provides customized documents to be filed and submitted at government institutions.
LaelTax CRM
This is a customer relationship management system for a CPA firm. The application is developed on Laravel and integrates with other systems via an API. It also has an API consumed from Zapier and a custom Chrome extension. I was the lead engineer in this project.
LaelTax Chrome Extension
This React-based Google Chrome extension makes it easy to interact with accounting tools and a custom CRM API. The extension auto-fills forms that can then be submitted to the API or fetches data from the API.
Education
2007 - 2011
Bachelor of Science Degree in Software Engineering
Kenyatta University - Nairobi, Kenya
Skills
Libraries/APIs
jQuery, Stripe API, Facebook API, Authorize.net, Node.js, PayPal API, React, Vue
Tools
Zapier, Apache Druid
Languages
PHP, JavaScript, HTML, PHP 7, HTML5, SQL, CSS
Frameworks
Laravel, JSON Web Tokens (JWT), CodeIgniter
Paradigms
REST, Testing
Platforms
WordPress, WooCommerce, LAMP, Joomla, Apache Kafka, Linux, CentOS, Kubernetes
Storage
MySQL, RDBMS, Druid.io, JSON, MongoDB
Other
Software Engineering, Computer Science, APIs, Web Development, API Design, Full-stack, API Integration, eCommerce
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