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Jon Leonhardt Email & Phone Number

Principal Front End Engineer | Front End Architect | UI Architect | Visualizer of Complex Data | Full Stack Engineer | General UI Problem Solver - Looking for my next challenge
Location: Loomis, California, United States 9 work roles 3 schools
1 work email found @cisco.com 4 phones found area 408 and 916 LinkedIn matched
✓ Verified August 2026 4 data sources Profile completeness 86%

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Work email j****@cisco.com
Direct phone (408) ***-****
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Role
Principal Front End Engineer | Front End Architect | UI Architect | Visualizer of Complex Data | Full Stack Engineer | General UI Problem Solver - Looking for my next challenge
Location
Loomis, California, United States

Who is Jon Leonhardt? Overview

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Jon Leonhardt is listed as Principal Front End Engineer | Front End Architect | UI Architect | Visualizer of Complex Data | Full Stack Engineer | General UI Problem Solver - Looking for my next challenge based in Loomis, California, United States. AeroLeads shows a work email signal at cisco.com, phone signal with area code 408, 916, and a matched LinkedIn profile for Jon Leonhardt.

Jon Leonhardt previously worked as Principal Front End Engineer at Verizon and Principal Front End Engineer at Oath. Jon Leonhardt holds Bachelor Of Arts (Ba), Design And Visualization from Silicon Valley College.

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Profile bio

About Jon Leonhardt

JonLeonhardt08@gmail.com | 408 515 5133Highly versatile analytical and detail-oriented Principal UI engineer with a strong background in program management, offering vast experience building enterprise web applications. Skilled in identifying and documenting requirements up and down the stack; full stack development; Heavy focus on UI/UX design. Renown for quickly learning new programming languages, frameworks, styles, and best practices. Demonstrated accomplishments in leading Global IT and development teams through long-term product development cycles.Specialties: Program Management, HTML, HTML5, Web Services, JavaScript, Cisco Digital Media Systems, Perl, Flash, Action Script, Oracle, XML, Usability, Application Development, ExtJS, jQuery, Enterprise Content Management, JSON, YUI, SQL, UI Design, UX, Agile, CSS3, REST, SOAP, Dojo, Python, SQL, AJAX, DOM, Web Standards, AngularJS, PHP, Bootstrap, MySQL, JSP, Data Visualization, D3

Listed skills include Javascript, Xml, Html, Program Management, and 35 others.

9 roles · 25 years

Jon Leonhardt work experience

A career timeline built from the work history available for this profile.

Principal Front End Engineer

Basking Ridge, Nj, Us

Served as a part of the Big Data Analytics team, leading an engineering team of 7+ engineers responsible for the front end of several Verizon big data analytic products visualizing large and complex data sets with various Big Data technologies, JavaScript frameworks and libraries. • Worked across business functions to help define, design and quick-prototype new features for large scale internal analytic and marketing platform.• Managed development by offshore team of large scale internal analytics marketing platform.• Mentored interns and junior engineers.• Built large scale dashboards and visualizations for complex datasets used to monitor wireless infrastructure and help target maintenance spend.

Aug 2021 - Jul 2023

Principal Front End Engineer

New York, New York, Us

Worked as a Big Data Analytics team, leading an engineering team of 9 engineers responsible for the architecture, and full stack development of analytic products across various verticals. Aided engineering leads from other teams across Yahoo and Verizon to ensure all parts of the different application stacks are closely aligned and optimized. • Built and maintained a large component library used across multiple products, with styled components, react, D3, Leaflet and Storybook. • Defined front end architecture for several large scale analytic products and maintained ongoing code quality through code review. • Designed and implemented analytic products combining Verizon and Yahoo datasets to better determine user viewer patterns streamlining and saving millions in targeted ad spend. • Built fast prototypes and working proof of concepts, for enterprise customers such as Well Fargo, Disney, the NFL, and NBA.

Aug 2018 - Aug 2021

Principal Front End Engineer

Us

Part of the Big Data Analytics team, leading an engineering team of 5+ engineers responsible for the front end of several Verizon big data analytic products visualizing large and complex data sets with various Big Data technologies, JavaScript frameworks and libraries. Working closely with engineering leads from other teams, responsible for machine learning, data architecture and QA, to ensure all parts of the different applications stacks are closely aligned and optimized.• Builds complex data visualizations and reusable components with the help of D3.js and leaflet.js.• Defines front end architecture for several large scale analytic products and maintains ongoing code quality through code review.• Designed and Engineered a large scale "click to add" feature which allowed users of our marketing analytic product to filter their data by directly interacting with the applications visualizations and charts, resulting in an improved user experience.• Builds fast prototypes and proof of concepts, many of which later became stand alone projects or major features within an existing products.• Works closely with product managers to define business requirements and leads resource planning to make sure committed deliverables are met every sprint.• Engineered and continues to improve on several large geo-location features and products with the help of Mapbox, Leaflet.js, GeoJSON and D3.js.• Leading efforts to expand engineering teams in Palo Alto and Waltham, as well as establishing a brand new offshore team in Bangalore.

Nov 2014 - Aug 2018

Senior Software Engineer

Arlington, Virginia, Us

Part of a small engineering team behind an industry leading large scale secure testing platform, used by 18 different state school boards and millions of students. Worked with QA and PM teams in an agile workflow to define and translate business requirements into new product features as well as debug existing code, with focus on front end development.• Responsible for front end development of the application which makes up nearly 80% of the code base, with heavy use of advanced JavaScript, jQuery, Rangy, YUI and HTML5.• Owned several key features of the application, which included maintaining, debugging and enhancing, mostly revolving around aiding students with disabilities.• Designed and integrated new and innovative UI components into the platform, helping students better engage in the testing process and improve the overall user experience.

Feb 2014 - Jul 2014

Lead Front End Engineer

San Jose, Ca, Us

Implement new and creative ways for all Employee Communications team; inform and engage with a workforce of over 100,000 employees and contractors through technology. Lead cross functional partnerships with IT and business technology organizations on many high profile applications and projects. Defined technology processes and best practices for several internal communications teams. Web Application development and backend engineering with Perl.• Designed, engineered and managed Cisco Now an award winning integrated digital signage platform, with custom content management system, used for internal communications and active in 129 Cisco locations across the globe, saving the company 2 million dollars over five years. • Created, developed and implemented a custom content management system for Cisco Now. Used to manage over 200 streams of localized content by 300 administrators across globe.• Managed Cisco’s internal news management system; renders over 300,000 pages of content, and lead an enhancement effort which expanded the user base beyond just technical staff doubling the number of administrators to over 5,000.• Built and managed several internal applications used to engage Cisco workforce, combining for over 250,000 visits a quarter.• Lead internal communication’s efforts during a multi-year cross-functional project between Communications, Sales and IT to define requirements, workflows and implement an internal social news system within WebEx Social, Cisco’s internal collaborative intranet platform.• Lead internal communications in a year-long joint effort with IT, Sales and Engineering to migrate the entire intranet and all web applications, over two million pages and scripts, to a new data center and development environment.• Influenced many business critical decisions regarding the Cisco intranet, its direction and focus, as well as replacement platforms and future functionality requirements.

Dec 2007 - Dec 2013

Lead Web Developer At Cisco

Milwaukee, Wi, Us

Managed Cisco intranet homepage, and published all news content appearing there and on corresponding theatre main pages. Created templates used for executive communications both through email and the intranet. Developed custom UI, JavaScript and Perl solutions. Automated business processes through application development and documentation.• Managed Cisco global internal homepage averaging 150,000 views a month; 88% of employees use as main source of news and information about Cisco business. • Created custom email templates used by the CEO, CFO and other executives to communicate to over 100,000 employees and contractors worldwide.• Developed Flash and JavaScript components, with Perl backend, for homepage and later re-used by many of the internal development teams across company.• Through application development and automation was able to move Internal Communications team away from manual and outdated processes resulting in higher efficiency and more dynamic user experience for their target audience.

Apr 2007 - Dec 2007

Senior Web Developer At Cisco

Milwaukee, Wi, Us

Created new and updated existing websites on Cisco intranet; used web technologies such as JavaScript, XHTML, Flash, XML and CSS. • Designed, implemented and managed thousands of internal web pages across dozens of organizations.• Created and coded HTML mailer templates for many different executive communications.• Supplied graphic support both for web and presentations at all levels across the company.• Coded all advanced JavaScript solutions for our team of over 12 developers and their clients.• Provided UX, UI, information architecture and accessibility guidance for all clients.

Sep 2006 - Mar 2007

Lead Web Developer

San Jose After-School All-Stars

Designed, implemented and managed the web presence for the San Jose chapter of this national non-profit providing after-school activities for at risk inner city youth. In addition to the normal duties relating to website, JavaScript, HTML and CSS developed i was also in charge of creating all online marketing materials as well graphics both for web and print.• Helped transition the program from print to web by designing and implementing their first website and moving all program materials, schedules and forms online.• Re-designed their website, collateral and print materials to better align to the national brand identity.• Streamlined the registration process for the end users by integrating it into their website.• Increased productivity of the front office staff by creating templates and processes that allowed many of their clerical tasks be done through the website.

2002 - 2005 ~3 yrs

Web Developer

California Department Of Motor Vehicles

As a student web developer for the state i was responsible for creating and maintaining standardized web pages across the DMV intranet for the Licensing Operations Department (LOD). Day to day duties included using HTML, JavaScript, CSS, ColdFusion and XML to maintain the internal LOD web presence as well their external assets on the customer facing DMV website. Highlights include:• Designed, implemented and managed the web presence of the New Motor Vehicle Board.• Helped with early adoption of V1.0 California State Portal templating system allowing for a more integrated and better end user experience.• Designed and managed several hundred pages within the DMV external website.• Designed, implemented and managed the internal intranet presence for LOD, which included developing new templates and standards to enforce a single brand identity for the organization.• Provided remote IT support to all field offices in 35 regions throughout the state of California.

Mar 2000 - Jan 2002
3 education records

Jon Leonhardt education

Bachelor Of Arts (Ba), Design And Visualization

Silicon Valley College

Computer Science

San José State University

Computer Science

Sacramento City College
FAQ

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What is Jon Leonhardt's role at their current company?

Jon Leonhardt is listed as Principal Front End Engineer | Front End Architect | UI Architect | Visualizer of Complex Data | Full Stack Engineer | General UI Problem Solver - Looking for my next challenge.

What is Jon Leonhardt's email address?

AeroLeads has found 1 work email signal at @cisco.com for Jon Leonhardt.

What is Jon Leonhardt's phone number?

AeroLeads has found 4 phone signal(s) with area code 408, 916 for Jon Leonhardt.

Where is Jon Leonhardt based?

Jon Leonhardt is based in Loomis, California, United States.

What companies has Jon Leonhardt worked for?

Jon Leonhardt has worked for Verizon, Oath, Verizon Labs, American Institutes For Research, and Cisco Systems, Inc..

How can I contact Jon Leonhardt?

You can use AeroLeads to view verified contact signals for Jon Leonhardt, including work email, phone, and LinkedIn data when available.

What schools did Jon Leonhardt attend?

Jon Leonhardt holds Bachelor Of Arts (Ba), Design And Visualization from Silicon Valley College.

What skills is Jon Leonhardt known for?

Jon Leonhardt is listed with skills including Javascript, Xml, Html, Program Management, Agile Methodologies, Web Services, Web Development, and Web Applications.

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