• Quickly got up to speed on a convoluted legacy system. Served as one of the few experts on the system. Assisted greatly in fielding questions from fellow team members, and helping provide guidance when needed

• Pushed for changes to deployment process to reduce frequency of issues with production deployments

• Worked with client-facing teams to quickly solve critical production issues and remediate a backlog of historically corrupted data

• Designed and led architecture of a new Business Process Model-like state machine for a legacy system to help reduce data integrity issues, improve clarity to our internal teams of what states our Business Objects were in, and ease development

• Pushed and implemented solutions for environment parity issues, unit test pass rate / performance problems, consolidation / cleanup of deployment strategy, and other systemic issues creating friction for the team when working with the system

• Researched and built well-documented proposal for re-building a non-functional acquired consumer mapping system

• Proposed integration with existing architecture, and pushed to modernize the system with significant benefits to simplicity, ease of development, and scalability

• Worked across large inter-organizational units to develop a unification plan for acquired systems

• Handled diagnosing complex issues involving many systems: Diagnosed the root cause of TileJSON map tiles failing to load on only Firefox, which was determined to be a HTTP/1 to HTTP/2 reverse proxy bug triggering a buffer overflow bug inside Firefox. Quickly identified the problem area even in the massive, unfamiliar, codebase of a browser

• Put forth new architectural patterns for NodeJS microservices. Worked to build up new services and move off the legacy patterns which had complicated development previously.

• Assisted swapping out legacy code via facades with newer, more flexible approaches.

• Greatly improved Engineer & Operations productivity / troubleshooting ability by pushing for system-wide Distributed Tracing, with an improved JSON-based logging approach

• Built a Rules-based Calculation Engine for providing a consistent view of a user despite the variety of backing data sources

• Built a Graph-based Compiler for dynamically building up Elasticsearch queries based on a simplified user-facing query language

• Assisted with hardening legacy services to improve reliability

• Collaborated in architectural discussions to ensure new work was done with a maintainable approach

• Helped facilitate communication and cooperation with other teams

• Provided support to blocked work, and Junior Engineers

• Worked heavily with legacy services to understand core workings after original developers left

• Became go-to resource for services others were typically reluctant to touch

• Provided immediate support for production issues with legacy services