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Ammunition · 1 month ago

asp.net / Umbraco Developer

Atlanta, GA

Full-time

Onsite

Senior Level

5+ years exp

Ammunition is a full-funnel advertising agency headquartered in Atlanta, GA, known for building brands that move markets. They are seeking an ASP.NET / Umbraco Developer to build modern, scalable web applications and maintain existing systems while collaborating with cross-functional teams.

AdvertisingCRMProduct DesignSocialWeb Development

H1B Sponsor Likely

Responsibilities

Partner with the Development team, CTO, and Project Managers to conceptualize and implement sophisticated software solutions tailored to client needs

Serve as Ammunition’s subject-matter expert for the Microsoft .NET ecosystem, providing technical authority on architecture, tooling, and implementation

Design scalable, secure, and efficient client-side and server-side architectures using ASP.NET Core, C#, and modern development frameworks

Develop responsive, high-performance front-end applications using HTML, CSS, JavaScript, and modern JavaScript frameworks (React, Vue, or equivalent)

Architect, build, and maintain robust relational databases (SQL Server, Azure SQL) and data models that support both client and internal initiatives

Engineer efficient, well-documented RESTful APIs and services for integrations with enterprise systems and third-party platforms

Evaluate and recommend .NET CMS platforms (e.g., Umbraco, Sitefinity, Kentico) and contribute to establishing reusable components and patterns for future projects

Maintain, troubleshoot, and improve existing Umbraco sites running on legacy .NET Framework/IIS

Extend Razor templates, uSkinned components, and CMS-driven front-end experiences

Implement performance, SEO, and accessibility improvements within the current architecture

Execute testing across unit, integration, regression, and performance layers

Diagnose and optimize .NET applications for speed, security, and maintainability

Contribute to CI/CD pipelines, DevOps workflows, cloud deployments, monitoring, and logging

Collaborate with designers, strategists, and project managers to translate requirements into technical solutions

Write documentation and support knowledge-sharing within the team

Qualification

ASP.NET CoreUmbracoC#SQL ServerHTML/CSS/JavaScriptProblem-solvingCommunicationDocumentation

Required

5+ years as a .NET or Full Stack Developer in a fast-paced environment

Proficient with both legacy ASP.NET MVC /.NET Framework and modern ASP.NET Core

Professional experience building and maintaining Umbraco sites (v8 or v9+)

Strong front-end development skills (HTML, CSS, JavaScript, React/Vue/Svelte)

Experienced with SQL Server, Azure SQL, and ORMs such as Entity Framework or Dapper

Able to integrate APIs with systems such as Dynamics, Salesforce, or HubSpot

Experience with IIS deployments and Windows-based hosting environments

Working knowledge of accessibility standards, responsive design, and SEO principles

Experience with cloud hosting (Azure preferred), CI/CD pipelines, containerization, and monitoring

Strong problem-solving, communication, and documentation skills

Proactive, organized, and committed to continuous improvement

Company

Ammunition

Ammunition is a full-funnel advertising, equal part digital consultancy and creative shop.

Founded in 2017

Atlanta, Georgia, USA

11-50 employees

https://www.ammunition.agency

H1B Sponsorship

Ammunition has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)

Distribution of Different Job Fields Receiving Sponsorship

Represents job field similar to this job

Trends of Total Sponsorships

2025 (1)

2022 (1)

2021 (1)