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HLK Agency Logo

Senior Web Developer with Sitecore Certification

HLK Agency

$90,000 - $132,000
Sep 22, 2025
St. Louis, MO, US
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HLK is looking for a Senior Web Developer with Sitecore experience to join their Technology Group to play a key part in client platform migrations while also continuing to design, build, and optimize digital solutions that support long-term client needs.

Requirements

  • Significant experience developing data-driven web applications.
  • Expert-level grasp of .NET (Framework and .NET Core) and MVC architecture.
  • Strong front-end skills (Semantic HTML5, CSS, JavaScript, and associated frameworks and tooling).
  • Ability to assess, use, and create REST and GraphQL APIs.
  • Strong knowledge of Sitecore development, customization, and integration, including experience with Sitecore 9.x and an understanding of XM Cloud, Sitecore Headless Services, and JSS/SXA.
  • Familiarity with Azure PaaS, containers, and cloud-native development for Sitecore deployments.
  • Experience with content serialization and migration tools (Sitecore CLI, Sitecore Content Serialization, Unicorn).

Responsibilities

  • Significant experience developing data-driven web applications.
  • Expert-level grasp of .NET (Framework and .NET Core) and MVC architecture.
  • Strong front-end skills (Semantic HTML5, CSS, JavaScript, and associated frameworks and tooling).
  • Ability to utilize new development technologies to find creative solutions for websites and web applications.
  • Ability to assess, use, and create REST and GraphQL APIs.
  • Strong knowledge of Sitecore development, customization, and integration, including experience with Sitecore 9.x and an understanding of XM Cloud, Sitecore Headless Services, and JSS/SXA.
  • Familiarity with Azure PaaS, containers, and cloud-native development for Sitecore deployments.

Other

  • The successful candidate must have an insatiable desire to learn, explore and implement technology solutions for our clients while aligning with the agency’s core values: Be Curious, Be Thoughtful, and Be Brave.
  • Ability to work within a collaborative team environment.
  • Desire to learn continuously and mentor junior developers.
  • Ability to write technical documentation and create application flow diagrams to be used by the development team during programming stages.
  • Strong communication skills (both in person and in writing).