Built tooling and dashboards to identify potential configuration improvements, then worked with service teams to implement and verify those improvements, reducing server costs by ~$25M/year while improving service reliability.
Started and led a cross-organization project (10+ teams) to load test large (>10k hosts) high-risk stateful services and improve estimates for hosting needs. Used load test results to safely reduce server costs by over $10M/yr.
Started projects to improve CPU utilization monitoring to improve load balancing and capacity planning using load test results and simple statistical models.
Mentored a summer intern who successfully completed his project and was offered and accepted a post-graduation position.
Led project to build a high-uptime, scalable, low-latency integration with a card processor, designing the data model, REST API and async processing.
Technical lead on a project to improve signup funnel completion, reducing errors during signup by 95% and improving overall user onboarding rate by ~10% while reducing system complexity.
Led project to migrate database clients from Prisma to Sequelize on a system with millions of transactions and hundreds of thousands of users. Improved performance and reliability. Reduced server costs by ~75%.
Led team to implement high-uptime/low-latency REST and sFTP integrations in OCaml with customers' ATS and HRIS systems (iCIMS, Taleo, PeopleFluent, ADP) with millions of job applications.
Refactored an ETL job for processing customer spreadsheets with millions of employment events, improving performance by 2 orders of magnitude while also improving code readability, memory usage, and debuggability.
Designed and implemented Dockerized services on ECS with automated deployments to fix biweekly issues with unreliable manual/stateful deployments.
Maintained and/or wrote OCaml open source libraries (PostgreSQL database driver, Excel file reader, FreeTDS-based SQL Server library).
Mentored junior engineers on career development and technical topics.