- Led a team of six engineers from Seed through Series A ($4MM raised, $15MM Valuation)- Cut database costs by 60% by optimizing all SQL queries to downsize database servers - Monitored and optimized all AWS resources to minimize cost and predict performance issues- Introduced team to Infrastructure as Code (IaC), moved all infrastructure into Terraform, and created test and staging environments to minimize the time required to test code- Drastically reduced the number of bugs in production by introducing the team to unit testing, integration testing, and load testing- Re-architected our backend infrastructure and built a new deployment pipeline, enabling us to transform our single instance web app into a multi-tenant enterprise SaaS app, resulting in $800k+ new Annual Recurring Revenue and a new parent company (SalesRiver)- Architected, scheduled, and led the development of several major (multi-month) projects- Mentored engineers on design patterns, data structures, algorithms, query optimizations, security, and best practices, through code reviews, peer programming, and documentation- Collaborated with Design team to plan new features, ensuring that UI/UX could be developed as efficiently as possible

Assumed all CTO duties while CTO was on leave

Mobile and web app development

- Led the strategy, discovery, and initial planning of a new social network for construction craft professionals- Built the entire backend of a new Single Sign-On Service and took full ownership of the project, including architecture, infrastructure, testing, deployment, migration, monitoring, maintenance, training, and coordinating with third-party software developers- Completely overhauled an antiquated database and reporting system, including a database cloud migration (MSSQL => RDS Aurora Postgres), new ETL pipeline, drastically improved data schema, new GraphQL API, new CRUD web app, and dozens of reports- Developed real-time reports and conducted ad-hoc statistical analyses to produce actionable insights for executive leadershipTypeScript, JavaScript, SQL, Next.js, Python, AWS Cognito, Glue, Athena, S3, RDS, DMS, Lambda, API Gateway, Power BI, DAX, Node, Express, REST, GraphQL, Hasura, React, Vercel, Auth0, Material UI, Sketch, Postgres, MSSQL, SSRS, MongoDB, Terraform, GitHub Actions, Jest, CodeCov, Jira, Docusaurus

- Developed an open-source web app for animating and analyzing eye tracking data to study how construction craft workers extract visual information from construction drawings, results published in 7 peer-reviewed papers, this app was the foundation of my PhD dissertation- Developed an Artificial Neural Network (ANN) and web app for the Colorado DOT, providing substantially more accurate and consistent estimates of construction durations than CDOT’s existing methods, app is now used for all new highway construction projects throughout the state and the model is being expanded for other state DOTs- Developed a web app that applied the decision-making Delphi Method 50x faster than traditional implementations, results published in a CII-funded research study (Research Team DCC-01)JavaScript, Python, SQL, R, Keras, TensorFlow, NumPy, scikit-learn, OpenCV, Matplotlib, Node, Express, REST, React, Meteor.js, Electron.js, Material UI, Vercel, Auth0, Postgres, AWS RDS, Lambda, S3, Travis CI, Jest

- Complete civil site design for new manufacturing facilities with $40MM - $200MM budgets, including site and utility layout, grading and erosion control plans, stormwater systems, retaining walls, parking lots, minor roads, and rails.- Wrote AutoLISP and Visual Basic scripts to automate design workflows in AutoCAD Civil 3D.AutoCAD Civil 3D, AutoLISP

- Developed a web app to slash construction engineering review times from 2 months to 2 weeks- Expanded the app into a social network for construction professionals- App was acquiredPHP, Laravel, JavaScript, SQL, MySQL, phpMyAdmin, AWS S3, PHPUnit, PHPSpec, Faker, phpDocumentor

- Technical oversight of the construction of 4 municipal water and wastewater treatment plants with a total budget of $126MM