Remote Senior Software Engineer - Lead .NET Modernization

ICF; United States; Remote; USD 119,000 - 203,000; Full time

Job summary

ICF Next is seeking a hands-on Technical Lead to guide a delivery team responsible for secure .NET applications, data entry, batch processing, and reporting. You will mentor engineers, drive architectural decisions, and ensure delivery of scalable, high-quality software with automated testing and robust security and accessibility practices.

You will collaborate with engineers across UI, backend, data, and security to implement REST APIs, SQL Server models, and integrated workflows while aligning

Qualifications

• Bachelor's degree in computer science, software engineering, information systems, or related field, or equivalent professional experience.
• 5+ years developing and supporting resilient, well-tested production web applications, including 3+ years using C#, .NET or .NET Core, and ASP.NET MVC or Web API with OO design.
• 2+ years leading or providing technical direction to software engineers, including code reviews and stakeholder communication.
• 3+ years working with SQL Server or another relational database, including data modeling and performance troubleshooting.
• 2+ years developing REST APIs and browser-based apps using JSON/HTML/CSS/JS or TS, with strong HTTP/HTTPS understanding.
• 2+ years using automated testing and Git-based development workflows; 1+ year supporting cloud-hosted apps using containers.

Responsibilities

• Lead a delivery team by organizing work, setting priorities, removing blockers, and coaching engineers.
• Design, develop, and maintain production web applications using C#, .NET, ASP.NET Core or MVC, and modern JavaScript/TypeScript.
• Translate requirements into clear technical designs and implementation plans.
• Guide REST API design, domain models, SQL Server structures, and integrations with internal/external systems.
• Oversee data entry, batch upload, validation, workflow, notifications, reporting, and data download capabilities.
• Set expectations for automated tests, code quality, peer review, branching, and release readiness.
• Support CI/CD and coordinate releases with cloud, DevSecOps, DB, and QA teams.
• Lead investigation of production defects using logs, monitoring, and root-cause analysis.
• Ensure secure coding, least-privilege access, RBAC, privacy, and WCAG/508 compliance throughout delivery.
• Participate in Agile planning, estimation, demos, releases, and UAT with stakeholders.

Skills

Leadership

Coaching

Agile planning

Stakeholder communication

Mentoring

Education

Bachelor's degree in CS or related field

Equivalent professional experience

Tools

C#

.NET

ASP.NET Core

JavaScript/TypeScript

SQL Server

REST APIs

Git-based workflows

CI/CD pipelines

AWS GovCloud

Container deployment

Job description

ICF Next is seeking a hands-on Technical Lead to guide a delivery team responsible for secure .NET applications, data entry, batch processing, and reporting. You will mentor engineers, drive architectural decisions, and ensure delivery of scalable, high-quality software with automated testing and robust security and accessibility practices.

You will collaborate with engineers across UI, backend, data, and security to implement REST APIs, SQL Server models, and integrated workflows while aligning