Zach Kilburn, Developer in Tulsa, OK, United States
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Zach Kilburn

Verified Expert  in Engineering

Salesforce Apex Developer

Tulsa, OK, United States
Toptal Member Since
November 26, 2021

Zach is a certified Salesforce developer and administrator with four years of experience turning business dreams into reality. He excels in building scalable solutions for sales, marketing, and finance teams in startups and large organizations at the top of their field. With a strong understanding of core technologies such as Lightning Web Components, platform events, Apex, and process automation, Zach is well versed in best development practices for the Salesforce environment.


Freedom Mortgage
Salesforce Apex, Salesforce Aura Component, Git, GitHub, Salesforce...
Salesforce, Administration, Salesforce Apex, Salesforce REST API
Salesforce Apex, Salesforce Aura Component, GitLab, GitLab CI/CD, Git...




Preferred Environment

Visual Studio Code (VS Code), Salesforce, Windows, MacOS, Ubuntu

The most amazing...

...thing I've developed is a React-based computer telephony integration for HubSpot that allows outbound dialing through Five9.

Work Experience

Software Engineer

2021 - PRESENT
Freedom Mortgage
  • Maintained and improved upon existing Salesforce functionality.
  • Developed a clean, consistent, and well-tested code for deployment.
  • Contributed to the team planning and advised on best practices for Salesforce lead routing and management.
Technologies: Salesforce Apex, Salesforce Aura Component, Git, GitHub, Salesforce, Salesforce REST API


2019 - PRESENT
  • Assisted in new Salesforce organization setup and ongoing maintenance.
  • Gathered data through web scraping; compiled and managed the client databases.
  • Interpreted the client’s business logic and built efficient data pipelines.
  • Developed the new tools and software to accommodate the custom business needs.
Technologies: Salesforce, Administration, Salesforce Apex, Salesforce REST API

Software Engineer

2020 - 2021
  • Created new features for and maintained ActiveCampaign’s Salesforce integration app.
  • Participated in planning, designing, and documenting the app features.
  • Handled escalated customer requests that required engineering support.
  • Assisted in meeting Salesforce partnership requirements and security reviews to prepare the application for the Salesforce AppExchange.
Technologies: Salesforce Apex, Salesforce Aura Component, GitLab, GitLab CI/CD, Git, Salesforce, Salesforce REST API

Salesforce Administrator

2018 - 2020
  • Handled essential administrative functions such as creating reports and dashboards, maintaining data cleanliness, automating business processes, implementing security practices, and managing integrations.
  • Extended the Five9 integration to Salesforce to support call center agents and enhance reporting.
  • Created a new functionality using custom Apex classes, Visualforce pages, and Lightning web components.
  • Developed and presented the training materials and ensured that page layouts were aligned with the users’ needs and workflows.
  • Communicated within the organization to ensure proper data management and support business processes.
  • Developed an SMS autoresponder application that enhanced conversion rates and improved user experiences.
Technologies: Administration, Five9, Mode Analytics, Python, Flask-RESTful, Twilio, SMS Bots, Lightning Web Components (LWC), Zapier, Salesforce, Salesforce REST API

Account Executive

2015 - 2017
Expert TA
  • Engaged in a full-cycle sales process encompassing cold calling, product demonstrations, account management, and customer support.
  • Managed HubSpot CRM, including sending marketing emails, coordinating webinars, and managing digital advertising campaigns.
  • Contributed to planning discussions related to the product features and enhancements.
  • Aided in regression testing and quality assurance related to the product updates.
Technologies: Communication, Sales, HubSpot CRM, Quality Assurance (QA), Marketing Mix

Five9—HubSpot Dialer

The Five9—HubSpot Dialer is an application that allows HubSpot users to make click-to-dial outbound calls from the HubSpot CRM using Five9. It creates basic call engagement records in HubSpot after a call is dispositioned. If a user adds call outcomes in HubSpot that match its Five9 dispositions, the user can align call results between the two systems. This application fills an existing gap in HubSpot’s marketplace, as there is no official offering of a telephony product for users of Five9. However, it is not an official solution supported by either HubSpot or Five9.

I utilized open-source libraries from HubSpot and Five9 to develop a Node.js and React dialer interface with an OAuth-connected back end.

Salesforce AppExchange Application for ActiveCampaign
ActiveCampaign is a marketing automation and CRM platform with a rich ecosystem of available third-party integrations. The ActiveCampaign Salesforce integration allows customers to synchronize the contact, lead, account, and opportunity data between the two systems.

I worked on the team that maintained the AppExchange application, which allowed ActiveCampaign users to extend their Salesforce environments to include ActiveCampaign marketing automation tools. I contributed to developing an enhancement to support syncing Salesforce opportunities with ActiveCampaign custom objects.

Enhancements of Five9 Integration to Salesforce

Five9 is an enterprise-level telecommunications service provider and is a popular choice for sales teams and call centers. Their existing Salesforce integration works well, but sometimes the business requirements can’t be met with out-of-the-box solutions.

I customized the existing Five9 integration to Salesforce while working with ConsumerAffairs. I developed new features that allowed the organization to better align call tasks with the lead records, run more rich and detailed reports regarding agent productivity, and support agent workflows through user interface enhancements.
2010 - 2012

Master's Degree in Environmental Science

Oklahoma State University - Tulsa, OK, USA

2004 - 2008

Bachelor's Degree in Marketing

Oklahoma State University - Stillwater, OK, USA


Salesforce Certified Platform Developer



Salesforce Certified Administrator



Flask-RESTful, Salesforce REST API, Node.js, React


Zapier, Five9, Salesforce DX, Git, GitHub, GitLab, GitLab CI/CD


Visualforce, Windows PowerShell


Python, JavaScript, TypeScript


Model View Controller (MVC), Automation


Salesforce, MacOS, Heroku, Windows, Ubuntu, Twilio, Visual Studio Code (VS Code)


Salesforce Apex, Salesforce Aura Component, Administration, Web Scraping, Interactive Voice Response (IVR), Quality Assurance (QA), Research, Scientific Data Analysis, Communication, Business, Marketing Mix, HubSpot CRM, Lightning Web Components (LWC), Mode Analytics, Salesforce AppExchange, SOAP, Sales, SMS Bots

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