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William Loo Email & Phone Number

Senior Principal Engineer at Paylocity Corporation
Location: Arlington Heights, Illinois, United States 7 work roles 1 school
1 work email found @paylocity.com 4 phones found area 847, 877, 312, and 800 LinkedIn matched
✓ Verified May 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email · 4 phones

Work email w****@paylocity.com
Direct phone (847) ***-****
LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Paylocity Corporation
Role
Senior Principal Engineer
Location
Arlington Heights, Illinois, United States
Company size
6379 employees

Who is William Loo? Overview

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Quick answer

William Loo is listed as Senior Principal Engineer at Paylocity Corporation, a company with 6379 employees, based in Arlington Heights, Illinois, United States. AeroLeads shows a work email signal at paylocity.com, phone signal with area code 847, 877, 312, 800, and a matched LinkedIn profile for William Loo.

William Loo previously worked as Principal Engineer at Paylocity Corporation and Senior Application Developer at Allstate Insurance Company. William Loo holds Ba, Computer Information Systems from Northwestern University.

Company email context

Email format at Paylocity Corporation

This section adds company-level context without repeating William Loo's masked contact details.

{first_initial}{last}@paylocity.com
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AeroLeads found 1 current-domain work email signal for William Loo. Compare company email patterns before reaching out.

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Profile bio

About William Loo

William Loo is a Principal Engineer with more than twenty years of experience in leading, designing and developing complex enterprise applications integral to key business strategies. He has both Big 5 consulting and Fortune 100 experience across many industries, including automotive, education, healthcare, financial services and insurance. One of his key differentiators is the ability to focus on high level business goals and then utilize technology to provide significant business value in support of them. He has a proven track record of closely collaborating with stakeholder partners using agile methodologies to create and translate strategic visions into the successful delivery of software products. He is also recognized as a strong technical leader and innovator and is a named inventor on several US patents. He has managed diverse development teams and is a Microsoft Certified Professional Developer for the .NET platform with an expertise in ASP.NET.Technical Skills: ASP.NET Core, .NET 8/6/4.8, C#, AWS, Azure, Docker, Web API, ADO.NET, HTML, CSS, JavaScript, React, SQL, XML, JSON, SQL Server, ELK (Elasticsearch, Logstash, Kibana), Datadog

Listed skills include .Net, Asp.Net, Web Services, Sdlc, and 46 others.

Current workplace

William Loo's current company

Company context helps verify the profile and gives searchers a useful next step.

Paylocity Corporation
Paylocity Corporation
Senior Principal Engineer
Arlington Heights, IL, US
Website
paylocity.com
Employees
6379
AeroLeads page
Company profile
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7 roles

William Loo work experience

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

Principal Engineer

Current
Paylocity Corporation

Schaumburg, Illinois, US

Member of the Cloud Center of Excellence responsible for driving the adoption of cloud technologies, developing re-usable components for product teams, and performing architectural enhancements to deliver scalable enterprise applications.

Apr 2016 - Present

Senior Application Developer

Allstate Insurance Company

Northbrook, IL, US

Senior Application Developer within the Technology Innovation Research & Development group, providing rapid technology evaluation, systems analysis, prototyping, development, and operational support for emerging product and service offerings.

Oct 2011 - Apr 2016

Lead Application Developer

Allstate Insurance Company

Northbrook, IL, US

Application Development Team Lead in the Internet Marketing Technologies division, providing design, development and support for the Allstate.com online servicing portal ("My Account").

Nov 2006 - Oct 2011

Associate / Application Development Analyst Iii

Jpmorgan Chase

New York, NY, US

Member of the JPMorgan Chase Investment Bank group, providing systems analysis, development and support to several lines of business. Primarily responsible for designing, implementing, and maintaining Microsoft-based applications.

Sep 2003 - Oct 2006

Senior Consultant

Cap Gemini Ernst & Young

Paris, France, FR

Member of the Technical Consulting practice in the Chicago Advanced Delivery Center. Primarily responsible for building software applications and supporting the Microsoft Community of Practice within the company.

Sep 2000 - Sep 2003

Programmer

Northwestern University Collaboratory Project

Web Application Developer for Northwestern University initiative that provides resources and services to K-12 teachers interested in using Internet technologies to advance education.

Dec 1997 - Jun 2000
Team & coworkers

Colleagues at Paylocity Corporation

Other employees you can reach at paylocity.com. View company contacts for 6379 employees →

SK Sabina K C Sabina K C Colleague at Paylocity CorporationKaty, Texas, United States, United States View → JT Jakob Tuiaana Jakob Tuiaana Colleague at Paylocity CorporationDes Plaines, Illinois, United States, United States View → SS Stacy Smith Stacy Smith Colleague at Paylocity CorporationOcala, Florida, United States, United States View → NL Nick Lillie Nick Lillie Colleague at Paylocity CorporationLakeland, Florida, United States, United States View → AG Alyssa Gutierrez-Furlin Alyssa Gutierrez-Furlin Colleague at Paylocity CorporationGreater Chicago Area, United States View → AS Anna Swierzowski Anna Swierzowski Colleague at Paylocity CorporationSaratoga Springs, New York, United States, United States View → CH Calli Hatfield Calli Hatfield Colleague at Paylocity CorporationTulsa Metropolitan Area, United States, United States View → VS Vasily Shorokhov Vasily Shorokhov Colleague at Paylocity CorporationLos Angeles Metropolitan Area, United States, United States View → LB Lysle Baker Lysle Baker Colleague at Paylocity CorporationUnited States, United States View → JS John Sobraske John Sobraske Colleague at Paylocity CorporationNew York, United States, United States View →
1 education record

William Loo education

  • Northwestern University
    Northwestern University
    Computer Information Systems
FAQ

Frequently asked questions about William Loo

Quick answers generated from the profile data available on this page.

What company does William Loo work for?

William Loo works for Paylocity Corporation.

What is William Loo's role at Paylocity Corporation?

William Loo is listed as Senior Principal Engineer at Paylocity Corporation.

What is William Loo's email address?

AeroLeads has found 1 work email signal at @paylocity.com for William Loo at Paylocity Corporation.

What is William Loo's phone number?

AeroLeads has found 4 phone signal(s) with area code 847, 877, 312, 800 for William Loo at Paylocity Corporation.

Where is William Loo based?

William Loo is based in Arlington Heights, Illinois, United States while working with Paylocity Corporation.

What companies has William Loo worked for?

William Loo has worked for Paylocity Corporation, Allstate Insurance Company, Jpmorgan Chase, Cap Gemini Ernst & Young, and Northwestern University Collaboratory Project.

Who are William Loo's colleagues at Paylocity Corporation?

William Loo's colleagues at Paylocity Corporation include Sabina K C, Jakob Tuiaana, Stacy Smith, Nick Lillie, and Alyssa Gutierrez-Furlin.

How can I contact William Loo?

You can use AeroLeads to view verified contact signals for William Loo at Paylocity Corporation, including work email, phone, and LinkedIn data when available.

What schools did William Loo attend?

William Loo holds Ba, Computer Information Systems from Northwestern University.

What skills is William Loo known for?

William Loo is listed with skills including .Net, Asp.Net, Web Services, Sdlc, Enterprise Architecture, Software Development, Agile Methodologies, and Web Applications.

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