Primary focus was to improve application backend performance. Fixed numerous performance bottlenecks in existing DB architecture including unoptimized MySQL indexes and queries with detrimental function calls that would bypass indexes. Replaced inefficient stored procedures containing large computations with event driven systems (SNS/Lambda) to pre-compute datasets.

Secondary focus was on extending web application reporting including exports and visualizations. (ChartJS / React / Node)

Implemented a chat tool (React) for app subscribers (home inspectors) to communicate with all related parties (buyers,sellers,brokers,agents) through the app. Tool used Twilio for SMS integration, AWS SNS to receive inbound messages from Twilio and socket.io to add internal middleware / business logic and push messages to client UI on open socket.

Built a single page application to streamline new subscriber onboarding to import existing data such as contacts, uploading static assets like logos and documents, and configuring 3rd party integrations such as payment processors. (React)

Containerized web application, moving app config/secrets out of code base, built docker-compose profiles for local development, Cloud Formation templates for AWS production, staging and CI environments. (Docker / Cloudformation)

Automated CI using CodeBuild and CodePipeline. Triggered by GitHub hooks, used CodeBuild to build docker images, build projects and dependencies, push tested images to a repository for future deployment into Elastic Container Service.

Replaced the legacy search module with Elasticsearch, built API to query it and apply business logic, which resulted in easier development and more robust search accuracy and scalability.

Improved application performance with event triggered, pre-computed datasets. Used Kafka/Apache Storm for pipeline, Redis for storage, Statsd for metric aggregation.

Built message based user tracking system to provide both user data of current session for customer support and for real time application metrics monitoring by aggregating date through statsd and Graphite

Integrated 3rd party A/B testing to test revenue differences between UX changes to enable max revenue generation. (LaunchDarkly)

Containerized existing web app and ancillary services to create consistent development and production environments (docker/docker-compose)

Refactored analytics REST API to use a stack of transformations which would process all business logic one record at a time instead of its original batch behavior which allowed more predictable memory usage. ( PHP / PHPUnit / Nginx / MySQL / AWS S3 / AWS EC2 / AWS SQS / AWS SES / Memcache / Jenkins )

Added instrumentation and monitoring to existing systems to allow quicker response to system malfunctions and overload. ( Statsd / Graphite / Pager Duty / AWS SES )

Wrote original REST API for using combination of open source tools and custom built ORM. ( PHP / Nginx / MySQL / AWS S3 / AWS EC2 / Memcache / Jenkins )

Wrote original reporting REST API for analytics functionality. ( PHP / Nginx / MySQL / AWS S3 / AWS EC2 / Memcache / Jenkins )

Wrote scheduled tasks for background analytics reporting jobs. ( PHP / Cron / AWS S3 )