Christopher Nielsen Email & Phone Number

Rochester, New York, United States

Rochester, New York, United States

* Agile contributor to a kiosk-based photo printing system.* Developed a printer simulator using Java, Spring Boot, and SNMP4J, improving productivity by 20%.* Designed and developed two Node.js native C++ libraries, exposing Windows APIs (printing, optical media) to JavaScript/TypeScript.* Integrated native libraries into Node.js microservices, including business logic.* Developed a JavaScript SNMP client access layer, based on library node-net-snmp; also contributed back via GitHub, raising issues and submitting fixes.* Championed and documented best practices for Java and JavaScript.* Collaborated heavily via weekly team activities, including code reviews, design discussions, sprint planning, bug triage, and mentoring of junior developers.* Other technologies used: REST microservices (Node.js Express); NoSQL (MongoDB); dev tools (Git, Azure DevOps, Postman, Visual Studio Enterprise 2022).

Rochester, New York, United States

* Agile contributor to a distributed human-resources and retirement tracking system.* Developed and maintained REST microservices using Java, Spring Boot, and Spring Security.* Created and enhanced Oracle PL/SQL stored procedures, identifying complementary indexes and other performance opportunities.* Proactively identified technical debt, collaborating with owners to implement improvements.* Provided cross-team mentoring and design guidance, documented best practices, and assisted with troubleshooting.* Contributed continually to team development, including onboarding guides, planning, pull request reviews, design, and production triage.* Subject-matter expert for Java and Oracle database, sharing knowledge whenever possible.* Worked in DevOps-centric delivery environment, with CI/CD pipelines; stack included Jenkins, Docker, Kubernetes, and OpenShift.* Other technologies used: NoSQL (MongoDB); messaging (Kafka, RabbitMQ); authentication (SiteMinder); cloud services (Amazon AWS, S3); dev tools (Git, BitBucket, Confluence, JIRA, TOAD).

Rochester, New York, United States

* Authored clear architecture guidance: advanced load balancing health standard; Java app server guidance; Java development best practices; Java JVM tuning; Coherence best practices; Oracle database transaction tracking.* Responsible for several middleware architecture areas, fostering strong partnerships with development and operations.* Middleware lead for WebLogic upgrade from 10.3.x to 12c, collaborating with operations and product management.* Collaborated with development to deploy Java JVM tuning best practices, including implementation of scripts for use within containers.* Collaborated continually with fellow architects, providing feedback on architecture guidance, assistance with development best practices, and proposed organizational architecture shifts.

Rochester, New York, United States

* Heavily Java-centric position, continually supporting development and infrastructure teams.* Middleware lead for corporate single sign-on (SSO) initiative, providing technical leadership in numerous areas: Layer7 webservice retry/overload; adoption of self-healing architectures; development of enhancements and fixes; support during production outages; and performance tuning.* Technical lead for product isolation project, helping to drive architecture, design, development, and tuning.* Middleware lead for Coherence initiatives, including Coherence*Web expansion, and non-web grid adoption across development divisions.* Subject matter expert for Java, JVM tuning, WebLogic, and Coherence.* Participated in numerous collaborations: datacenter affinity; smart load balancing; Layer7 XML gateway; composite monitors.

Rochester, New York, United States

* Waterfall contributor to Paychex’s payroll suite, written in Java and JavaScript.* Responsible for three areas: core payroll, payroll online (CAOP), and general ledger online (CAGL).* Work entailed new feature implementation and business-as-usual (BAU) fixes and enhancements.* Technical lead for migration of CAOP/CAGL to WebLogic/Coherence, collaborating extensively with middleware architecture and operations.* Technical lead for corporate single sign-on (SSO) initiative, within payroll online space. Also designed and developed two foundational SSO services.* Subject matter expert for Java, Spring, WebLogic, and Coherence.* Provided leadership in production support and performance testing.