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# Full Stack Web Developer

- **Company:** COA, Inc.
- **Location:** Santa Fe Springs, CA, United States
- **Experience:** Experienced
- **Salary:** $93,600.0 - $99,840.0
- **Contract:** Permanent contract
- **Skills:** ASP.NET, HTML, JavaScript (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Macintosh Application Environment, Business Logic, HTML5, C Sharp (Programming Language), Cascading Style Sheets (CSS), Databases, Software Debugging, Microsoft SQL Server, Node.Js, Regression Testing, Software Tools, Microsoft Copilot, Shopify, Software Deployment, Software Systems, SQL Stored Procedures, Systems Integration, Web Applications, ReactJS, Claude, Webhooks, GPT, Api Management, Legacy Systems
- **Published:** October 27, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=ee287472846901ca

## About the Role

* 3+ years of professional experience building or supporting web applications
 * Experience with Microsoft-based development stacks such as ASP.NET, C#, and Microsoft SQL Server
 * Confidence working in established application environments where application code, database logic, and integrations are closely connected
 * Working knowledge of modern front-end and JavaScript development, including HTML5, CSS3, JavaScript, and responsive UI implementation
 * Experience consuming or supporting APIs, webhooks, and system integrations
 * Ability to thoroughly test one's own work and think critically about edge cases, regressions, and production risk
 * Strong problem-solving skills and the ability to use AI coding and research tools effectively, including writing precise prompts, reviewing generated output, and correcting weak or incorrect results
 * Clear written and verbal communication skills
 * Ability to work productively in a fast-moving environment with fewer formal processes than a large enterprise team, * Experience with Shopify development, including Liquid templating and storefront customization
 * Familiarity with React and Node.js in a production setting
 * Exposure to AWS or other cloud-hosting platforms, particularly application migration efforts
 * Experience improving or modernizing legacy systems incrementally
 * Background working directly with business stakeholders in an operations-driven organization

## Description

* Maintain, troubleshoot, and enhance existing ASP.NET, C#, and SQL Server applications supporting daily business operations
 * Work directly with database-driven application logic, including queries, views, stored procedures, and related reporting or support processes
 * Support and improve recurring scheduled jobs and other operational processes that keep business workflows running
 * Build and maintain Shopify storefront features, custom Liquid components, and supporting webhook or API integrations
 * Contribute to modern user experiences using React, Node.js, JavaScript, HTML, and CSS where appropriate
 * Help define and implement pragmatic modernization steps, including improved service boundaries, API usage, deployment practices, and cloud-hosting patterns
 * Participate in the company's AWS migration over time, beginning with lift-and-shift support and progressing to more modular application deployment approaches
 * Use AI tools (such as Codex, Claude, ChatGPT, Copilot, or similar) to accelerate design, coding, debugging, and documentation, while independently validating accuracy and business fit
 * Perform functional and regression testing, and validate releases before updates are deployed, with strong attention to quality and production stability
 * Collaborate closely with business stakeholders to understand requirements, ask clarifying questions, and translate real operational needs into practical software solutions