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Jon Fenner, CTO Developer in Burlington, VT, United States
Jon Fenner

CTO Developer in Burlington, VT, United States

Member since April 4, 2018
Jon has over 20 years of experience in leadership, web application design, development, and infrastructure using a variety of platforms, including React, Node.js, React Native, NoSQL, and MySQL. Jon is an exceptional communicator and works well individually and as a team player or leader.
Jon is now available for hire
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Portfolio

Experience

Location

Burlington, VT, United States

Availability

Part-time

Preferred Environment

React, React Native, Amazon Web Services (AWS), Visual Studio Code (VS Code), Node.js

The most amazing...

...work I've done has been with remote patient monitoring to help improve patient care and make healthcare more affordable and inclusive.

Employment

  • Chief Technical Officer

    2020 - PRESENT
    Community Wellness Technology
    • Architected and led the development of a remote patient monitoring platform using React, React Native, AWS, and MongoDB technologies.
    • Included Bluetooth integration of devices with React Native app for remote monitoring of patients.
    • Provided security leadership for all security and technology-related operations within the company.
    • Led a team to build out R&D projects based on the needs of patients, focusing on a variety of IoT, AI, Bluetooth Low Energy (BLE), and wearable technologies.
    • Developed IoT devices for Bluetooth integration of remote patient monitoring and integration with ESP32 for data collection.
    • Worked on the design of patented pill dispenser using ESP32 controller with ULN2003 stepper motors.
    Technologies: React, React Native, MongoDB, Fast Healthcare Interoperability Resources (FHIR), Healthcare, IoT Security, CTO, Security, Amazon S3 (AWS S3), AWS HA, Amazon Web Services (AWS), Artificial Intelligence (AI), DevOps, Node.js, AWS Lambda, MongoDB Atlas, Agile, Certified Ethical Hacker (CEH), Leadership, Hardware Platform Interfaces (HPI), REST APIs, TypeScript, System Architecture, Security Software Development, Architecture, APIs, Databases, Full-stack, Software as a Service (SaaS), Terraform, Team Leadership, Documentation, SaaS, Software Architecture, REST, Data Lakes, API Integration, Back-end, XML, Wearables, Web Development, Minimum Viable Product (MVP), Responsive Web Apps, Healthcare IT, Internet of Things (IoT), MacOS, Electronic Medical Records (EMR), Electronic Health Records, Agile Delivery, Engineering, Product Growth, B2B, Android, iOS, Google Calendar API, Smart Devices, PHP, Redis, Software Engineering, Python, GitHub, Machine Learning, Data Science, Redux, AWS Fargate, Amazon Elastic Container Service (Amazon ECS), Firebase, DevSecOps, Cloud, Stripe, Stripe API, Shopify, Stripe Checkout, Stripe Connect, Stripe Payments, Data Analysis, Data Analytics, Mobile Development, Mobile Apps, Mobile App Development, Microsoft Excel, MERN Stack, Technical Leadership, Project Management, Cloud Architecture, GraphQL, NoSQL, Data Protection, Compliance, Full-stack Development, Startups, Early-stage Startups, Appointment Booking, Booking Apps, OpenAPI, Security Architecture, Risk Management, IT Management, Vulnerability Assessment, HIPAA Compliance, GitLab, Bluetooth LE, Embedded Systems, Firmware, Remote Control, Bluetooth, Cloud Security, Jenkins, Statistical Analysis, Enterprise Architecture, Enterprise Application Architecture, Enterprise, Stripe Subscriptions, Visual Studio Code (VS Code), Pandas, Express.js, ELK (Elastic Stack), Elasticsearch, Kibana, Logstash, Amazon EC2, Solution Architecture, Cryptography, Mobile Security, Networks, Data Security, Web Architecture, Video Streaming, Twilio, Twilio API, Cybersecurity, SIEM, Authentication, Vulnerability Identification, PostgreSQL, Distributed Systems, System Architecture Design, Application Architecture, Microservices Architecture, CI/CD Pipelines, Amazon CloudWatch, Unit Testing, Integration Testing, Amazon Route 53

  • CTO | Principal Consultant

    2005 - PRESENT
    AuraQuest
    • Served as the architect for a website that supported over 20 million hits per day and a 9TB data warehouse design for 16 million users.
    • Performed big data analysis using artificial intelligence techniques, including neural networks, regression analysis, and intelligent algorithms.
    • Contributed to security analysis, ethical hacking, and security policy documentation for multiple clients and businesses across various websites and infrastructures.
    • Developed a multitier Amazon Cloud-based front-end application for the customer support of Charter.net.
    • Created and supported security policies and procedures across multiple cloud environments, including AWS, Azure, and Rackspace Cloud.
    • Developed an internal React Native application for EnchantaFrame digital art frame. This integrates with Google Compute Platform (GCP) and a Firestore back end for a NoSQL database, authentication, and analytics.
    • Built a dual robotic arm system using Raspberry Pi and Parallax controllers for harvesting specialty crops.
    • Created an IoT device using ESP32 and TMP36 to connect via Bluetooth and WiFi as a remote server for a Grafana-based dashboard displayed on an Android tablet in kiosk mode.
    Technologies: Amazon Web Services (AWS), Google Cloud Platform (GCP), Apache Tomcat, REST APIs, MySQL, Node.js, React, Java, SQL, Amazon S3 (AWS S3), AWS HA, Artificial Intelligence (AI), DevOps, React Native, Consulting, Agile, Certified Ethical Hacker (CEH), Leadership, Financial Markets, Hardware Platform Interfaces (HPI), TypeScript, System Architecture, Security Software Development, Architecture, APIs, Databases, Full-stack, Software as a Service (SaaS), Terraform, Team Leadership, Documentation, SaaS, Software Architecture, REST, Data Lakes, API Integration, Microservices, Back-end, XML, Web Development, Minimum Viable Product (MVP), Responsive Web Apps, MacOS, Raspberry Pi, Internet of Things (IoT), IT Security, Security, CTO, Engineering, B2B, Android, iOS, Smart Homes, Amazon Alexa, Google Calendar API, Smart Devices, PHP, Redis, Software Engineering, Technical Writing, Security Policies & Procedures, Python, GitHub, Machine Learning, Data Science, Redux, AWS Fargate, Amazon Elastic Container Service (Amazon ECS), Firebase, DevSecOps, Cloud, Stripe, Stripe API, Shopify, Stripe Checkout, Stripe Connect, Stripe Payments, Trading, Forex, Data Analysis, Data Analytics, Mobile Development, Mobile Apps, Mobile App Development, Microsoft Excel, MERN Stack, Technical Leadership, Project Management, Cloud Architecture, GraphQL, C#.NET, Data Protection, Compliance, Full-stack Development, Startups, Early-stage Startups, Learning Management Systems (LMS), OpenAPI, Zapier, Security Architecture, Risk Management, IT Management, Vulnerability Assessment, PCI, C, GitLab, Bluetooth LE, Embedded Systems, Firmware, Remote Control, Bluetooth, Cloud Security, Jenkins, Fortran, Statistical Analysis, Enterprise Architecture, Enterprise Application Architecture, Enterprise, Stripe Subscriptions, WordPress, Reverse Engineering, Visual Studio Code (VS Code), Pandas, Express.js, ELK (Elastic Stack), Elasticsearch, Kibana, Logstash, Amazon EC2, Solution Architecture, Cryptography, Mobile Security, Networks, Network Security, Web Scraping, Data Security, Web Architecture, Cybersecurity, SIEM, Authentication, Vulnerability Identification, PostgreSQL, Distributed Systems, System Architecture Design, Application Architecture, Microservices Architecture, CI/CD Pipelines, AWS Elastic Beanstalk, Amazon CloudWatch, Unit Testing, Integration Testing, Amazon Route 53

  • Senior Developer

    2022 - 2022
    Spring Mobile Solutions
    • Created a proof-of-concept design and implementation for microservices integration with the existing SQL Server database in order to facilitate migration from the legacy system.
    • Explored, recommended, and demonstrated architecture implementation for microservices using serverless.com architecture.
    • Reviewed existing architecture to provide recommendations for performance, security, and maintainability improvement.
    Technologies: Microservices, Architecture, Node.js, Azure, SQL Server 2016, Payment APIs, Engineering, Fintech, B2B, Android, iOS, CSS, HTML, Software Engineering, GitHub, React Native, Mobile Development, Mobile Apps, Mobile App Development, Microsoft Excel, MERN Stack, Cloud Architecture, Full-stack Development, Vulnerability Assessment, Enterprise Application Architecture, Enterprise, Visual Studio Code (VS Code), Express.js, Mobile Security, Web Architecture, System Architecture Design, Application Architecture, Microservices Architecture

  • React Native Engineer

    2020 - 2020
    Anthem - Digital (Reorg - Web & Mobile) (via Toptal)
    • Architected and developed a React Native application from scratch to support the transition from native applications.
    • Contributed to the native bridge functionality between iOS/Android and React Native applications.
    • Supported the onboarding of other development teams at Anthem for React Native development.
    Technologies: React Native, JavaScript, Node.js, Agile, REST APIs, TypeScript, System Architecture, Architecture, APIs, Databases, Full-stack, Terraform, Team Leadership, Documentation, Software Architecture, REST, Back-end, XML, Web Development, Minimum Viable Product (MVP), Responsive Web Apps, MacOS, Payment APIs, Engineering, Fintech, B2B, Android, iOS, CSS, HTML, Software Engineering, GitHub, Redux, Cloud, Mobile Development, Mobile Apps, Mobile App Development, Microsoft Excel, MERN Stack, Cloud Architecture, Full-stack Development, Enterprise Application Architecture, Enterprise, Visual Studio Code (VS Code), Express.js, Mobile Security, Web Architecture

  • Principal Infrastructure Architect

    2009 - 2020
    Guidewire Software
    • Provided lead technical support, development, and training of Guidewire applications in various heterogeneous environments, including Microsoft Azure, Amazon Web Services (AWS), and Google Compute Platform (GCP).
    • Created a performance, functional, and security testing tool for generating large volumes of data to be used against the policy system. Generated 10 million policies and showed that the application could perform as expected.
    • Provided support and development for customers' initial rollout of ClaimCenter as the integration architect.
    • Performed security analysis, PCI compliance, and ethical hacker testing of external-facing applications, including penetration testing, performance load analysis, and overall site security.
    • Integrated the back end with over 16 external systems, including COA, Google Maps, DVLA, CUEPI, HPI, and MIAFTR.
    Technologies: Amazon Web Services (AWS), Google Cloud Platform (GCP), Azure, Hardware Platform Interfaces (HPI), Google Maps, Certificate of Analysis (COA), Linux, Windows, Oracle, Microsoft SQL Server, Java, Amazon S3 (AWS S3), AWS HA, Consulting, Agile, Certified Ethical Hacker (CEH), Financial Markets, REST APIs, System Architecture, Architecture, APIs, Databases, Full-stack, Software as a Service (SaaS), Team Leadership, Documentation, SaaS, Software Architecture, REST, Data Lakes, API Integration, Microservices, Back-end, XML, Web Development, Minimum Viable Product (MVP), IT Security, Security, Payment APIs, Engineering, Fintech, B2B, Banking & Finance, CSS, HTML, Software Engineering, GitHub, Data Science, Cloud, Data Analysis, Data Analytics, Microsoft Excel, Project Management, Cloud Architecture, Data Protection, Full-stack Development, IT Management, Jenkins, Statistical Analysis, Enterprise Architecture, Enterprise Application Architecture, Enterprise, Visual Studio Code (VS Code), Amazon EC2, Solution Architecture, Cryptography, Network Security, Data Security, Web Architecture, Cybersecurity, SIEM, Authentication, Vulnerability Identification, Distributed Systems, System Architecture Design, Application Architecture, Microservices Architecture, CI/CD Pipelines, Amazon CloudWatch, Unit Testing, Integration Testing, Amazon Route 53

  • AWS Security Architect

    2018 - 2019
    University of Colorado Boulder
    • Reviewed existing AWS architecture for security requirements and adherence.
    • Performed pen testing and security vulnerability analysis of website app.
    • Supplied security recommendations for website updates.
    Technologies: Web Security, IT Security, Security, Payment APIs, Engineering, B2B, Software Engineering, Security Policies & Procedures, GitHub, AWS Fargate, Amazon Elastic Container Service (Amazon ECS), SecOps, DevSecOps, Cloud, Microsoft Excel, Cloud Architecture, Data Protection, Full-stack Development, Security Architecture, Risk Management, Vulnerability Assessment, Cloud Security, Visual Studio Code (VS Code), Amazon EC2, Cryptography, Mobile Security, Networks, Data Security, Web Architecture, Cybersecurity, SIEM, Authentication, Vulnerability Identification, Amazon CloudWatch, Unit Testing, Amazon Route 53

  • CTO

    2003 - 2005
    HotChalk, Inc.
    • Provided technical lead support for the development of an education-focused application school collaboration. This was a web-based Java application with a MySQL back-end database designed to support 8,000 schools and 16,000,000 students.
    • Led a team of remote developers to implement various portions of the education application.
    • Took responsibility for all aspects of technology within HotChalk, including infrastructure, CRM, databases, security, and backups.
    Technologies: MySQL, Java, Agile, Leadership, System Architecture, Architecture, APIs, Databases, Full-stack, Team Leadership, Documentation, SaaS, Software Architecture, REST, API Integration, Back-end, XML, Web Development, Minimum Viable Product (MVP), Security, CTO, Engineering, B2B, Software Engineering, GitHub, Data Science, Cloud, Microsoft Excel, Technical Leadership, Project Management, Full-stack Development, Startups, Early-stage Startups, Learning Management Systems (LMS), IT Management, Statistical Analysis, Enterprise Architecture, Enterprise Application Architecture, Enterprise, Cybersecurity, Cisco, SIEM, CI/CD Pipelines, Unit Testing, Integration Testing

  • VP of Engineering

    2001 - 2003
    ProductFactory, Inc
    • Implemented a web-based project management application to provide collaboration and monitoring of projects.
    • Led a team of remote developers for testing and support of the application.
    • Provided support for investment acquisition and funding.
    Technologies: Microsoft SQL Server, Java, .NET, C++, Agile, C#, Leadership, System Architecture, Architecture, APIs, Databases, Full-stack, Team Leadership, Documentation, SaaS, Software Architecture, API Integration, Back-end, XML, Web Development, Minimum Viable Product (MVP), Security, CTO, Engineering, B2B, Software Engineering, GitHub, Data Science, Microsoft Excel, Technical Leadership, Full-stack Development, Startups, Early-stage Startups, IT Management, C, Statistical Analysis, Enterprise Architecture, Enterprise Application Architecture, Enterprise, Cybersecurity, Cisco, SIEM, Unit Testing, Integration Testing

Experience

  • Remote Patient Monitor EHR
    https://communitywellness.com

    Designed, architected, and led the implementation of a remote patient monitoring electronic health record (EHR) system. This included a React/Node.js portal for clinical coaches, a React/Node.js patient portal, and a React Native/Node.js iOS and Android application for collecting vitals from patients via Bluetooth integration.

  • Charter.net Web Application
    http://charter.net

    Developed a multitier Amazon Cloud-based front-end and back-end application for Charter.net's customer support and account management. This application used a microservices design principle to maximize the application's availability across a wide variety of regions with minimal downtime. The front end was a Node.js application, and the back end was developed using Java-based REST APIs.

  • Code for Vermont CVOEO Mobile App
    https://github.com/codeforbtv/cvoeo-app

    Worked on the design and development of React Native Expo app for support of the Champlain Valley Office of Economic Opportunity (CVOEO) that utilizes Firebase for back-end functions, database, authentication, and storage and deploys to iOS and Android mobile platforms.

  • Alexa Integration
    http://www.jonfenner.com/2016/

    Created a previously unavailable feature that connects my personal weather station and Alexa Flash Briefing.

    The integrated weather forecast for my location is inaccurate when using Alexa with Amazon Echo Dot. This location has a significant microclimate, and getting an accurate forecast is best done through Weather Underground. This is why I developed my own weather station and linked it to Alexa Flash Briefing.

  • Robotic Arm for Saffron Harvesting
    https://youtu.be/7tOFASmWVNk

    I designed, 3D printed, and implemented a dual-robotic arm system for saffron harvesting. It was based on three parallax processors (one for each arm, plus a central controller) and used a JeVois smart video camera for image recognition and correlation.

  • IoT Thermometer and Aggregate House Display
    https://github.com/jfenner/esp32-iot

    Developed an IoT device using an ESP32 and TMP36 digital thermometer to power a home-based dashboard.

    The ESP32 worked as a server to provide temperature information in real time via a REST API. The dashboard was hosted on a Raspberry Pi device using Grafana and displayed on an Android tablet in kiosk mode—displaying the information on full screen—including inside and outside temperatures, power consumption, solar production, and power status.

Skills

  • Languages

    SQL, JavaScript, Java, Python, TypeScript, XML, CSS, HTML, C, PHP, C#, C#.NET, Fortran, C++, GraphQL, Embedded C

  • Frameworks

    AWS HA, React Native, Express.js, AngularJS, Redux, .NET, CakePHP

  • Libraries/APIs

    Node.js, REST APIs, React, Google Calendar API, Stripe, Stripe API, Stripe Connect, OpenAPI, Twilio API, React Redux, Pandas, Google Maps, Parallax

  • Tools

    AWS Fargate, Amazon Elastic Container Service (Amazon ECS), Stripe Checkout, Microsoft Excel, Zapier, GitLab, Amazon CloudWatch, GitHub, Jenkins, Terraform, ELK (Elastic Stack), Kibana, Logstash, Apache Tomcat, MongoDB Atlas, Expo

  • Paradigms

    REST, Microservices, B2B, DevSecOps, Mobile Development, HIPAA Compliance, Enterprise Application Architecture, Web Architecture, Application Architecture, Microservices Architecture, Unit Testing, Agile, DevOps, Security Software Development, Data Science, Fast Healthcare Interoperability Resources (FHIR)

  • Platforms

    Amazon Web Services (AWS), Azure, AWS Lambda, MacOS, Raspberry Pi, Shopify, WordPress, Amazon EC2, Twilio, iOS, Android, Oracle, Visual Studio Code (VS Code), Bluetooth LE, Firebase, Amazon Alexa, Windows, Eclipse, Linux, Google Cloud Platform (GCP), Arduino, AWS Elastic Beanstalk

  • Storage

    Amazon S3 (AWS S3), Databases, NoSQL, MySQL, SQL Server 2016, Oracle RDS, MongoDB, Data Lakes, Redis, Elasticsearch, PostgreSQL, Microsoft SQL Server

  • Industry Expertise

    Security, IT Security, Project Management, Network Security, Cybersecurity, Banking & Finance, Healthcare

  • Other

    Certified Ethical Hacker (CEH), CTO, Leadership, Consulting, Amazon API Gateway, System Architecture, Architecture, APIs, Full-stack, Software as a Service (SaaS), Team Leadership, Documentation, SaaS, Software Architecture, API Integration, Back-end, Responsive Web Apps, Minimum Viable Product (MVP), Web Development, Healthcare IT, Web Security, Electronic Medical Records (EMR), Electronic Health Records, Payment APIs, Engineering, Product Growth, Fintech, Smart Homes, Smart Devices, Software Engineering, Technical Writing, Security Policies & Procedures, SecOps, Cloud, Stripe Payments, Trading, Forex, Data Analysis, Data Analytics, Mobile Apps, Mobile App Development, MERN Stack, Technical Leadership, Cloud Architecture, Data Protection, Compliance, Full-stack Development, Startups, Early-stage Startups, Learning Management Systems (LMS), Security Architecture, Risk Management, IT Management, Vulnerability Assessment, Embedded Systems, Cloud Security, Enterprise Architecture, Enterprise, Stripe Subscriptions, Reverse Engineering, Solution Architecture, Cryptography, Mobile Security, Networks, Web Scraping, Data Security, Cisco, SIEM, Authentication, Vulnerability Identification, Distributed Systems, System Architecture Design, CI/CD Pipelines, Integration Testing, Amazon Route 53, Financial Markets, Artificial Intelligence (AI), Wearables, Agile Delivery, Front-end, Machine Learning, Appointment Booking, Booking Apps, PCI, Firmware, Remote Control, Bluetooth, Statistical Analysis, Video Streaming, Hardware Platform Interfaces (HPI), IoT Security, Internet of Things (IoT), Grafana 2

Education

  • Bachelor of Science Degree in Computer Science
    1986 - 1991
    University of Texas at Arlington - Arlington, TX

Certifications

  • AWS Certified Solutions Architect - Professional
    NOVEMBER 2018 - NOVEMBER 2020
    AWS
  • AWS Certified Solutions Architect Professional
    NOVEMBER 2018 - NOVEMBER 2021
    AWS
  • Certified Ethical Hacker
    SEPTEMBER 2017 - AUGUST 2020
    ECCouncil

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