Verified Expert in Engineering
Justin is a technical professional with a passion for learning and 18+ years of experience leading teams to build enterprise-grade distributed applications that solve real-world problems. Justin firmly believes that collaboration across all facets of a business, from development to marketing to sales, is required to succeed in this endeavor.
Visual Studio Code (VS Code), Git, Docker, Python, Java
The most amazing...
...thing I've coded is a marketing automation engine that took in product info and consumer purchasing data and modeled what best to advertise to which consumers.
Vice President of Architecture
- Led the technical direction and implementation for the department in Fidelity that managed the interplay between Fidelity's two main lines of business—personal and workplace investing.
- Conducted a six-month-long endeavor involving hundreds of people across multiple teams and departments to determine the correct technical direction for the company, resulting in a comprehensive multi-year plan.
- Guided the project and managed the teams that opened up alternative investments to high-net-worth and retail investors.
- Built the first iteration of Fidelity's crypto offering.
- Awarded a seven-figure contract to rebuild a client’s CMS using Adobe Experience Manager, defined best practices for its use, and implemented a framework that enabled the business to iterate up to 1,000x faster on its marketing initiatives.
- Implemented a transaction marker that helped pinpoint the source of issues within their massively distributed, multi-team application infrastructure (multiple languages).
- Built a throttling system in Java that could be used by any team to throttle HTTP requests based on the responsiveness of the endpoints, and could, therefore, be responsive to increased demand.
- Performed technical due diligence on deals ranging from $100,000 to $10,000,000 for various clients.
- Designed and implemented a rapid-development plan with the goal of testing the revenue potential of at least one new product idea each month, achieving a 20% success rate in the program’s first year.
- Managed all corporate finances including taxes, budgets, cash flows, and the development of a financial model for budgeting and forecasting.
- Built a distributed lottery application on the Ethereum blockchain using Solidity.
- Created a self-driving car operating system using ROS, C++, Python, and TensorFlow that won a competition to be implemented and tested on live roads.
Chief Technology Officer
Human Factors, LLC
- Designed and built the back-end API using NestJS from scratch in just three weeks to be ready for FDA studies.
- Created local development environments and pipelines using Docker that mirrored production for rapid developer onboarding.
- Onboarded and managed three new developers over the next eight weeks, successfully delivering the second phase of functionality for FDA studies.
- Acted as the product owner, lead architect, and project manager for the back-end functionality, leading to a successful launch with no known bugs.
- Led the effort for proactive error detection and mitigation by implementing Sentry.io and configuring integrations.
- Implemented systems to reduce the application's fragility, such as retry logic and bug fixes.
- Augmented the existing API to add new functionality.
- Migrated an integration from one service to another by swapping out the implementation but maintaining all underlying working functionality.
- Ported an existing Excel spreadsheet to a web app that enabled better data tracking, sharing, and usability, increasing sales.
- Worked with the client to define and estimate the tool's features and functionality.
- Created the original framework for the application and infrastructure.
- Brought on four team members and led them through the implementation of the remaining functionality.
- Built the deployment and testing pipelines for the application and team.
Senior Java Developer
- Ported over legacy functionality to cloud web apps in Azure.
- Implemented systems to reduce the application's fragility.
- Deployed systems to maintain the application's performance across releases.
Chief Technology Officer
- Built plan for integrations and development required to provide cryptocurrencies as a fundraising option.
- Developed technical team and streamlined development process using Agile methodology.
- Led and oversaw all of the technical direction in the company.
Chief of Engineering
- Hired six months before the sale of the company with objectives to assist in the sale, improve quality and efficiency of the engineering team, reduce development time and costs, streamline business operations, and provide startup M&A experience.
- Assisted in the sale of the company for upwards of $40 million in assets and led the transition team.
- Reduced release cycle time by 60% by implementing automated regression testing focusing on automated deployments.
- Coordinated the integration effort to sell Promio's product offering as an up-sell to Surefire's application suite.
- Re-architectured queries in PHP and MySQL code to increase performance on the dashboard and other reports.
- Managed a team of five remote developers across the world.
Chief Technology Officer
- Led the architecture of a new product line that became the face of the business after only six months.
- Moved the business from post-billing to pre-billing, drastically increasing cash flows.
- Designed two-way integrations with three major digital advertising channels - Google, Facebook, and Bing.
- Helped in the sale of the company to a larger marketing technology company called Surefire Social after only 11 months.
Chief Technology Officer
- Directed product strategy through market research and interactive customer analysis.
- Led two teams of eight engineers, one that managed the technology products and another that reacted to the day-to-day needs of the business.
- Designed a data integration framework used to streamline client onboarding, cutting onboarding time down by a factor of 10.
- Managed all client and strategic request prioritization across the organization.
- Implemented a queue-based load leveling communication system to assure high reliability and scale between 13 highly utilized production systems.
Director of Technology
- Architected the integration between GetOne and m2M's products into a single product suite.
- Managed a technical team of six on-site developers.
- Coordinated the consolidation of third-party mobile applications development to be in-house again.
- Implemented project management tools to increase team efficiency and better track deadlines.
President and Chief Technology Officer
- Directed product strategy through competitive and market analysis.
- Oversaw all technological decisions and implementation.
- Managed a team of eight developers, five on-site and three off-shore.
- Redesigned web architecture for scale using Amazon AWS infrastructure.
- Managed third-party mobile applications development for Android and iOS operating systems.
- Coordinated and negotiated funding contracts for Series A and B investment rounds.
- Contributed to ongoing business plan and strategy for the company.
Software Development Engineer
- Built infrastructure through Amazon’s Simple Workflow Service to efficiently process the amortization of 20 million Amazon Prime payments each month.
- Gathered and organized project requirements from various stakeholders throughout the organization.
- Compiled design and test-case documentation to facilitate the ease of continued development.
Co-founder and Lead Developer
- Managed technology-based business decisions for the company.
- Assured simple integration of team member’s products.
- Constructed internal database from scratch in JDO and then SQL.
- Built mobile device communication API employed by 500,000 users.
- Developed smartphone applications for Android operating system.
- Coordinated and negotiated corporate organization contracts between LLC owners.
- Contributed to original business and funding plan for the company.
- Built Google Docs plug-in for the publisher portal of the Google Currents application used by thousands of publishers worldwide.
- Architected and built a versioning system using analogous to A/B testing that facilitated the release of new features in phases to different users.
- Created an Android integration for Google Docs plug-in.
Georgia Institute of Technology
- Taught recitations twice a week to advance students’ course material knowledge.
- Created programs to efficiently grade submitted homework and projects quickly and efficiently.
- Maintained grade-book records for 100+ students per semester.
- Hosted office hours during the week to enhance availability and increase hands-on learning.
- Assisted students in any way that helped further their education.
Mechanical Inspection Tool
The tool is written in Node.js with a MySQL database and leverages various frameworks such as typescript, docker, serverless, many AWS services (S3, Kinesis, Lambda, API Gateway, etc), terraform, etc
The tool is written in Node.js with a SQL Server database and leverages various frameworks such as typescript, docker, serverless, many AWS services (S3, Kinesis, Lambda, API Gateway, etc), terraform, etc
Run Tracker API
* API Users can create an account and log in.
* All API calls are authenticated using a form of OAuth.
* There are three roles with different permission levels:
** a regular user can CRUD on their owned records,
** a user manager can CRUD only users,
** and an admin can CRUD all records and users.
* Based on the provided date and location, the API will connect to an external weather API provider and get the weather conditions for the run, and store that with each run.
* A report endpoint exists that aggregates average speed & distance per week.
* Filtering capabilities exist for all endpoints that return a list of elements.
** Parenthesis are used for defining operations precedence and on any combination of the available fields.
** The supported operations are or, and, eq (equals), ne (not equals), gt (greater than), lt (lower than).
* Pagination exists for all endpoints that return a list of elements.
* Testing was done with unit tests and integration tests.
The project was built using a Java Spring Boot back-end, a MySQL database, and docker to spin up the modules.
Integration tests written in Ruby.
JOOQ used for application to database communication.
The tool is written in Python with a MySQL database and leverages various services and frameworks such as typescript, SCSS, Flask, Jinja2, SQLAlchemy, Stripe, docker, serverless, etc
The game is written in Solidity and runs on the Ethereum network.
The tool is typically used as a deployment application, but also has uses for notification and other purposes. The tool was developed to allow for decentralized deployments in a distributed microservice infrastructure.
The tool is written in python and uses a yaml file for configuration.
The tool has gone through many iterations and has complex logic to do things such as caching, locking, re-queueing, etc.
The tool was originally written in Java but was ported to C#, and leverages various frameworks such as .NET, docker, many AWS services (S3, Kinesis, Redshift, SQS, etc), Windows Powershell, terraform, etc.
JIRA Reporting Tool
The tool is written in Go Lang with PostgreSQL database and leverages various AWS services (S3, Redshift, etc).
Auth and Auth Service
This tool is used by multiple microservices to manage user access across a suite of products.
The tool is written in Java with a MySQL database and leverages various frameworks such as docker, Spring Boot, many AWS services (S3, EC2, etc), terraform, etc
Spring, Spring Boot, NestJS, Windows PowerShell, .NET, React Native, Hibernate, Hadoop, Ruby on Rails (RoR), Bootstrap, Angular
Node.js, jQuery, React, Vue, TensorFlow
Data Science, Agile, DevOps, Functional Programming, Management
Docker, Amazon Web Services (AWS), Azure, Ethereum, Apache Kafka, Android, Google App Engine, iOS, AWS Lambda, PagerDuty, Google Cloud Platform (GCP), Visual Studio Code (VS Code)
Amazon DynamoDB, PostgreSQL, MySQL, Microsoft SQL Server, Elasticsearch, MongoDB, BigTable, Cassandra
Freelancing, Back-end Development, Leadership, Software Architecture, Software Development, Consulting, Distributed Systems, Machine Learning, Full-stack, Artificial Intelligence (AI), Amazon Kinesis, Front-end Development, Embedded Software, Serverless, Robot Operating System (ROS), Workflow, HubSpot, Architecture, Cryptocurrency, Business, Finance, Entrepreneurship, Operations, Programming, Computer Vision, Computer Security
Adobe Experience Manager (AEM), Git, Splunk, Jira, MATLAB, Apache Tomcat, Kafka Streams
Doctor of Philosophy Degree in Distributed Microcomputing
Georgia Institute of Technology - Atlanta, GA, USA
Master's in Engineering Management Degree in Engineering-Business
Duke University - Durham, NC, USA
Bachelor of Science Degree in Computer Engineering
Georgia Institute of Technology - Atlanta, GA, USA
Self-Driving Car Engineer