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Hello, I’m Keelan Harris, a senior software engineer based in Warren, OH, with 13+ years of hands-on experience building and maintaining robust web and mobile applications. I excel at architecting scalable solutions across industries and enjoy turning complex requirements into reliable, user-friendly software. I thrive in cross-functional teams, mentoring peers, and delivering high-quality code. My passion for learning keeps me up-to-date with the latest technologies, from modern front-end frameworks to cloud-based back-end architectures.…Hello, I’m Keelan Harris, a senior software engineer based in Warren, OH, with 13+ years of hands-on experience building and maintaining robust web and mobile applications. I excel at architecting scalable solutions across industries and enjoy turning complex requirements into reliable, user-friendly software. I thrive in cross-functional teams, mentoring peers, and delivering high-quality code. My passion for learning keeps me up-to-date with the latest technologies, from modern front-end frameworks to cloud-based back-end architectures.

Keelan Harris

Full Stack Developer, Web Developer, Front-End Developer, +3

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Hello, I’m Keelan Harris, a senior software engineer based in Warren, OH, with 13+ years of hands-on experience building and maintaining robust web and mobile applications. I excel at architecting scalable solutions across industries and enjoy turning complex requirements into reliable, user-friendly software. I thrive in cross-functional teams, mentoring peers, and delivering high-quality code. My passion for learning keeps me up-to-date with the latest technologies, from modern front-end frameworks to cloud-based back-end architectures.…Hello, I’m Keelan Harris, a senior software engineer based in Warren, OH, with 13+ years of hands-on experience building and maintaining robust web and mobile applications. I excel at architecting scalable solutions across industries and enjoy turning complex requirements into reliable, user-friendly software. I thrive in cross-functional teams, mentoring peers, and delivering high-quality code. My passion for learning keeps me up-to-date with the latest technologies, from modern front-end frameworks to cloud-based back-end architectures.

Available to hire

Hello, I’m Keelan Harris, a senior software engineer based in Warren, OH, with 13+ years of hands-on experience building and maintaining robust web and mobile applications. I excel at architecting scalable solutions across industries and enjoy turning complex requirements into reliable, user-friendly software.

I thrive in cross-functional teams, mentoring peers, and delivering high-quality code. My passion for learning keeps me up-to-date with the latest technologies, from modern front-end frameworks to cloud-based back-end architectures.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

React and React Native Developer at REDCON1

March 1, 2023 - October 30, 2025

Led e-commerce migration from Shopify to Next.js, employing Context API for global state handling. Built a customer team dashboard with React, Node.js, Express and GraphQL in a microservices architecture on Docker. Developed and maintained mobile applications using React, React Native, and Material UI. Communicated with the client to understand requirements and authored the Project Design Document and Project Plan. Extensively used Git for version control and pushed code to GitHub. Performed comprehensive UI/system testing after QA. Stored data in MongoDB.

Senior Web and Mobile Developer at Google

January 1, 2023 - January 1, 2023

Enhanced client-side interfaces using React JS with styling via SASS. Created multiple POCs in React. Used WebSocket services to stream geo-location updates for Google Maps. Integrated RESTful services between client and server. Developed AWS APIs to connect defect management systems with the UI. Designed and customized responsive WordPress websites using Elementor and custom themes for diverse clients.

Frontend Developer at CryptoSlam Inc

December 1, 2020 - December 1, 2020

Integrated existing software into new or modified systems. Improved the UI layer for applications using React, Next.js, and Material UI. Integrated MetaMask and WalletConnect to enable secure trading. Collaborated with over 50 customers, resulting in 30 new contracts. Contributed to a multi-page, cross-browser, responsive web application. Refactored and migrated legacy payment services to improve scalability and performance. Created a custom Node.js proxy to simulate API responses before client implementation, managing authentication, headers, and routing.

Full Stack Developer at AgileEngine

February 1, 2018 - February 1, 2018

Designed and developed web pages using HTML5, CSS3, TypeScript, Bootstrap, SASS/LESS, React.js, Redux and Flex. Used Middleware, Redux-Promise to retrieve data from Back-End and perform RESTful services. Deployed a web application on Cloud Foundry using Python Django to derive insights from wearable device data. Built a classification model to predict user postures from wearable data with 90% accuracy. Analyzed sensor data (color and temperature) from a carpet manufacturing plant and implemented a framework to determine a range of sensor values for which carpets were being returned. Designed core components for a scalable backend system running on Kubernetes hosted on Google Cloud.

Full Stack Developer at RINA Systems, LLC

December 1, 2015 - December 1, 2015

Streamlined front-end design using HTML, CSS, JavaScript, jQuery, AJAX, and JSON. Cleaned data and extracted fields from unstructured datasets and loaded them into a relational database. Built usable search interface and implemented RESTful APIs for product platform. Utilized the Node library to display live video streams from designated sources. Built and maintained backend systems using PHP and Laravel.

Senior Web and Mobile Developer at Google

January 31, 2023 - January 31, 2023

Enhanced client-side interfaces using React JS; responsible for styling and look-and-feel with SASS. Created multiple POCs in React. Used WebSocket services to stream geo-location data updates for Google Maps. Integrated RESTful web services between client and server components. Developed AWS APIs to connect defect management systems with the user interface. Designed and customized responsive WordPress websites using Elementor and custom themes.

Frontend Developer at CryptoSlam Inc

December 31, 2020 - December 31, 2020

Integrated existing software into new or modified systems and operating environments. Improved the UI layer from scratch for applications using React, Next.js, and Material UI. Integrated MetaMask and WalletConnect to enable secure trading functionality. Collaborated with over 50 customers, resulting in 30 new contracts. Contributed to a multi-page, cross-browser compatible, and responsive web application. Refactored and migrated legacy payment services to improve scalability and performance. Created a custom Node.js proxy to simulate API responses before client implementation, managing authentication, headers, and routing.

Full Stack Developer at AgileEngine

February 28, 2018 - February 28, 2018

Designed and developed web pages using HTML5, CSS3, TypeScript, Bootstrap, SASS, LESS, React.js, Redux and Flex. Used Middleware, Redux-Promise to retrieve data from Back-End and to perform RESTful Services. Deployed a web application on Cloud Foundry using Python Django to derive insights from wearable device data. Built a classification model to predict user postures from wearable data with 90% accuracy. Analyzed sensor data (color and temperature) from a carpet manufacturing plant and implemented a framework to determine a range of sensor values for which carpets were being returned. Designed core components for scalable backend systems running on Kubernetes hosted on Google Cloud.

Full Stack Developer at RINA Systems, LLC

December 31, 2015 - December 31, 2015

Streamlined front-end design using HTML, CSS, JavaScript, jQuery, AJAX, and JSON. Cleaned data and extracted fields from unstructured datasets and load them into a relational database. Built a usable search interface and implemented RESTful APIs for the product platform. Used the Node library to display live video streams from designated sources. Built and maintained backend systems using PHP and Laravel framework.