Developed Pro Custodibus, a SaaS and on-prem solution for making WireGuard networks easy to manage.* Used by 100s of organizations to actively manage and monitor their network security.* Designed and built full system and operations, including: -- Highly-scalable Elixir/Phoenix back-end for aggregating, analyzing, and alerting on monitored data. -- Vue.js front-end for interactive reports and activity charts, plus guided wizards for config changes. -- Python agent for collecting data and updating customer endpoints. -- Secure cloud environment with AWS IAM, VPC, ALB, EC2, Aurora PostgreSQL, Secrets Manager, Route 53, S3, CloudFront, and CloudWatch. -- Integrations with Datadog, Stripe, Twilio, LDAP, iptables, syslog, and more. -- Containerized Docker images and native Linux deployment options for on-prem versions.* Authored dozens of technical articles on networking, security, containers, and Linux technologies.* Implemented WireGuard Go integration with hardware security keys.

Designed and built Vue.js front-end and tooling for blockchain monitoring and analysis platform.* Developed sophisticated D3.js visualizations for tracking block formation and transaction processing.* Built interactive transaction-network explorer with D3.js, SVG, and Javascript.* Designed UX workflows for onboarding, alerting, and chain validation.* Built analysis tools for deconstructing Ethereum and Fabric smart contracts in Javascript and Java.* Authored operational and security best practices for blockchain monitoring and management.* Created AWS CloudFormation infrastructure for managing internal test/demo blockchains.

Architected high-security, HIPAA-compliant platform for collecting, storing, and analyzing patient-reported outcome data.* Oversaw 3-4x growth yearly in patients enrolled and data collected.* Hired and managed team of 5 engineers.* Coordinated integration with dozens of hospital and private-practice EHR systems.* Mentored several junior engineers into seasoned developers.* Ran high-quality/high-output lean development lifecycle.* Made numerous individual technical contributions, including: -- Implemented core Groovy/Grails application logic. -- Maintained and optimized RDS MySQL/Aurora databases. -- Set up and maintained EC2 Linux boxes for various roles (bastion host, mailserver, SFTP server, webserver, etc). -- Built library of Ansible playbooks for managing AWS infrastructure. -- Developed comprehensive suite of security/compliance policies and procedures.

Designed and developed medical-coding data lookup and validation application with Groovy/Grails.* Built high-availability platform on AWS with ELB load balancing, EC2 application servers, and RDS MySQL backend.* Automated entire management of cloud infrastructure with Ansible.* Designed system to allow clients to build extensive custom rulesets for medical-claims validation.* Tuned Lucene search implementation for 10x improvement over out-of-the-box implementation.* Authored Grails plugins for HA authentication/authorization and client-side-resource management.

Developed Business-Process Management (BPM) webapp UI, including:* Workspace editor, enabling users to visually compose web-based workspaces via drag-n-drop of BPM portlets.* Theming editor, enabling users to visually select branding elements from their own corporate website and apply to a custom theme.* Web-clipping portlet, enabling users to visually select dynamic content from external websites to pull into a BPM workspace.* Client-side Javascript publish/subscribe framework, enabling disparate portlets to automatically coordinate client-side behavior.* Javascript documentation framework, enabling API documentation to be built from Javadoc-style comments in Javascript code.

Developed cutting-edge web UI framework based on Prototype.js, including:* Dynamic widgets such as autocomplete, dialog box, progressbar, datepicker, etc.* Client-side filtered/sorted/paginated tables/lists/trees, with drag-n-drop table/list/tree rows/items and columns.* Client-side field validation.* Localized language bundles.* Extensive test coverage.

Front-end expert on small team developing proprietary Java webapp container.* Developed extensible JSP page theming and layout framework.* Implemented custom JSP engine, improving load-test render speeds by 50% and concurrent users by 200%.* Designed custom Java REST toolkit.

Member of team developing Java web-portal server.* Implemented several iterations of the default portal UI with XSL stylesheets.* Optimized home-page render speed for several client sites by 10x.* Wrote client-side XML parser in Javascript.