David Singer Email & Phone Number

Port Orchard, Wa, Us

Port Orchard, Wa, Us

Gig Harbor, Wa, Us

* Working on projects to enhance their customer offerings, improve efficiency, and automate tasks.* Centralizing Logs into Elasticsearch for fast searching, graphing, monitoring, and analyses.* Create a Windows Desktop image for quick customer deployment.

Seattle, Wa, Us

* Hired into a project behind schedule, my initiative with automation using Python, resulted in completing it months ahead of schedule, greatly reduced risk of human error, and happier customers.* Improved a frequently used HR process taking 2 weeks to 2 days through automation, quality documentation, forms, checklists, and training.

Sunnyvale, California, Us

* Managed and enhanced Kazoo (a distributed, multi-tenant, VOIP PBX system), the CentOS Linux infrastructure, and the applications that integrate with it: Freeswitch, Kamailio, Provisioner, CouchDB, RabbitMQ, Apache, HAProxy, and VoipMonitor.* Enabled proactive problem prevention by deploying log centralization, analysis, and monitoring tools with Kafka, Elasticsearch, Kibana, and Grafana.* Saved hundreds of thousands of dollars per year in hardware and labor costs with the project I led merging two Kazoo clusters of 200,000+ users seamlessly as part of the corporate merger with Voxter.

Sunnyvale, Ca, Us

* Provided support to white-label customers’ support teams for their Kazoo clusters. 2600hz is the author/maintainer of Kazoo.* Improved support satisfaction by reducing log search time from four hours to ten seconds with tools I wrote.

Developed, deployed, enhanced and supported multiple telecom systems, the core of OnePipe’s business.Accomplishments:• Deployed, enhanced and supported Kazoo, distributed at 5 data centers around the world, hosting hundreds of retail businesses. Primary targeted to serve companies with offices in multiple countries.• Enhancement I made to the Class-4 telecom VOIP switch, that handled millions of call minutes a day, detected and prevented fraud and dialer traffic realizing significant savings for us, our customers and carriers.• Plan, design, program, and deploy highly scalable distributed SMS routing system. 2 weeks from initial commission it was ready for customer interop and in a month was handling millions of SMS a day.• Sample of Java code I wrote, an enhanced Radix tree. https://github.com/cando-daves/radixtree-java

• VOIP/Telecom Systems development, deployment, and management• Develop PBX, Class 4 & 5 switches based on OpenSIPS, Asterisk, and FreeSWITCH• Develop ancillary services including phone provisioning (configuration) server, user management, call record billing and report system using MySQL, Postgresql, PL/SQL, Java, Ruby on Rails, etc• Contribute back to Open-source community program code, documentation and forums.• Deployed and maintained hosted business PBXs utilizing OpenVZ and VMware server• Design and deploy SQL back end for systems: complex multi-table queries with self joins, stored procedures, triggers, and reports

• Provided computer support and consultation services• Implemented video security with Zoneminder

• Provided technology planning and support• Deploy & support Windows SBS 2003, Exchange, specialist for Linux, Windows, and Macintosh mixed environment• Systems backup and malware protection

• Provided 24-hour Level 2 customer support• Provided training for PCs, applications, network and diagnostic imaging equipment that are part of PACS (Picture Archiving & Communication System)• Researched, built, tested, installed, and managed servers, databases, workstations, and networks for PACS systems• Wrote custom queries/reports for internal and external customers• Serviced and maintained Kodak Computed Radiography (X-Ray), CR800/900 series units• Built, managed and monitored network management system for PACS servers and networks• System administrator for local office network, Linux systems, Window Small Business Server & Exchange

Roseville, Ca, Us

• Provided programming, QA and 24-hour on-call support as a member of the Clinical Systems Team made up of programmers and clinicians.• The development project was a database driven clinical documentation system.

Bachelor’S Degree, Computer Science

Bachelor Of Science - Bs, Computer Science