Full Stack Software Engineer - Clearance Required

Overview LMI is seeking a Senior Full Stack Software Engineer to support a Department of War mission partner on a digital modernization effort. This role sustains and modernizes government-owned business applications built on the Microsoft technology stack, keeping mission-critical .NET applications running reliably while helping re-engineer and migrate them into a secure AWS GovCloud environment. The engineer will work across the full stack, from SQL Server data layers to React front ends, within a DevSecOps pipeline. This is a largely remote position; however, candidates must reside in the vicinity of San Diego, CA to support periodic onsite collaboration. This position requires an active Secret clearance . LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed. Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and energy sectors—helping agencies navigate complexity and achieve mission success. Responsibilities - Design, develop, test, and maintain full-stack web applications across the Microsoft .NET stack, including C# with .NET Framework and .NET Core, ASP.NET WebForms and MVC, and IIS. - Build and maintain responsive front-end interfaces using JavaScript, React, HTML, and CSS. - Develop and integrate data solutions on Microsoft SQL Server, including SSIS packages and SSRS reports, and connect applications to data warehouses and data marts. - Modernize legacy Microsoft applications to current frameworks, operating systems, and Agile practices. - Operate within a DevSecOps pipeline using Azure DevOps, managing source control, builds, and secure CI/CD workflows. - Support the re-engineering and migration of applications into a secure AWS GovCloud environment. - Participate in Agile ceremonies and manage work through Azure DevOps boards and backlogs. - Support sustainment and governance activities, including technical documentation, change and incident management, user resources, and cybersecurity accreditation efforts. - Coordinate with government technical leads, platform and security teams, and other developers to deliver secure, reliable solutions. Qualifications Minimum Qualifications: - Active Secret security clearance. - Current DoD 8570/8140-compliant baseline certification appropriate for the position, such as CompTIA Security+. - Eight or more years of experience in full-stack business systems web software engineering. - Five or more years within the past ten years in DevSecOps, including Azure DevOps Services, Azure DevOps Server or Team Foundation Server, and management of modern DevSecOps processes. - Five or more years within the past ten years across all of the following: C# and .NET development, JavaScript, MS Visual Studio, SQL, React JS or Angular JS, HTML, CSS, MS ASP.NET, .NET Framework and .NET Core, and MS SQL Server. - Willing to work largely remote with periodic onsite collaboration in the vicinity of San Diego, CA. - Ability to explain technical issues clearly and work effectively with government civilians, military personnel, contractors, and enterprise support organizations. Preferred Qualifications: - Bachelor's degree in computer science, software engineering, information systems, or a related discipline. - Experience modernizing Microsoft applications to current frameworks. - Experience with jQuery, Bootstrap, DevExpress, and Django frameworks. - Experience with containerization and Kubernetes. - Experience with Microsoft Azure and cloud-native architecture and design. - AWS GovCloud experience, or demonstrated readiness to cross-train into AWS as applications migrate. - Experience supporting U.S. Special Operations Forces or other Department of War mission partners. Target Competencies: - Full-stack .NET application design and development - Front-end engineering with React and modern JavaScript - SQL Server data integration and reporting - Application modernization and cloud migration - DevSecOps and secure CI/CD delivery - Accountability, responsiveness, and attention to detail Target salary range: $123,000 - $135,000 Disclaimer: The salary range displayed represents the typical salary range for this position and is not a guarantee of compensation. Individual salaries are determined by various factors including, but not limited to location, internal equity, business considerations, client contract requirements, and candidate qualifications, such as education, experience, skills, and security clearances. Job Locations US-CA-San Diego