Senior .NET Engineer

NAVIGATE360 LLC • Richfield, OH

1d • Remote

About The Position

We are seeking a Senior .NET Engineer / Team Lead to drive both the technical execution and day-to-day leadership of an engineering team responsible for a safety-critical platform used by schools, public safety organizations, and law enforcement agencies. This is a hands-on leadership role, combining active software development with team leadership responsibilities. You will guide a multi-phase platform modernization—transitioning a legacy VB.NET Web Forms application to modern ASP.NET Core—while ensuring reliable, secure, and high-quality delivery through strong agile execution and engineering practices. You’ll operate in a greenfield-meets-brownfield environment, building modern systems while incrementally improving and decommissioning legacy components. This role also includes ongoing ownership and evolution of the platform and team beyond the migration effort.

Requirements

• Bachelor’s degree in Computer Science, Software Engineering, or equivalent experience
• 7+ years of professional software development experience
• Strong expertise in: C#, VB.NET, .NET Framework, and ASP.NET Core
• SQL Server (query optimization, security, multi-tenant patterns)
• Modern architecture and migration patterns (e.g., strangler fig)
• CI/CD pipelines and containerization (Docker, Kubernetes/EKS)
• AWS ecosystem (S3, RDS/Aurora, ALB, Secrets Manager, etc.)
• Experience leading agile teams and sprint ceremonies
• Strong understanding of SDLC and secure development practices
• Proven mentorship and leadership experience
• Strong communication and cross-functional coordination skills
• Experience with security tools and practices (SAST/DAST, SNYK, OWASP)

Nice To Haves

• 8+ years of experience in software engineering
• Scrum Master certification or equivalent
• Experience with: Razor Pages, HTMX, Tailwind
• MediatR and CQRS patterns
• Multi-tenant SaaS architectures
• FedRAMP, CJIS, or GovCloud environments
• Terraform or infrastructure-as-code
• Experience managing cross-team dependencies and large-scale migrations
• Interest in progressing into formal engineering management

Responsibilities

• Define and drive the technical roadmap for a phased migration from VB.NET Web Forms to ASP.NET Core (strangler fig pattern)
• Ensure team implementations align with approved architecture and engineering standards
• Make team-level design decisions and facilitate architecture discussions
• Identify and reduce technical debt to maintain a scalable, maintainable codebase
• Architect and implement core system components, including data access and service layers
• Serve as the primary escalation point for technical challenges
• Identify risks early and drive cross-functional resolution
• Coordinate dependencies across teams and systems
• Oversee releases across legacy and modern environments (IIS and containerized platforms)
• Collaborate with DevOps to improve CI/CD pipelines and deployment reliability
• Support cloud infrastructure and container orchestration (AWS, Docker, Kubernetes/EKS)
• Execute phased migration strategy: Security hardening, Business logic extraction, C# port, ASP.NET Core implementation, Incremental feature migration, Legacy decommission
• Consolidate legacy systems into a unified modern platform
• Transition supporting systems (e.g., hybrid mobile apps → PWA architecture)
• Enforce engineering and secure SDLC practices (SAST, DAST, threat modeling, SNYK)
• Lead security hardening efforts (encryption, session management, CSRF protection, tenant isolation)
• Coordinate with AppSec on reviews, signoffs, and incident response
• Ensure compliance with security standards such as OWASP Top 10
• Mentor engineers through code reviews, pairing, and technical guidance
• Foster a collaborative, high-performance engineering culture
• Support onboarding and ongoing growth of team members
• Facilitate design discussions and resolve technical disagreements
• Lead sprint ceremonies (planning, standups, retrospectives) and coordinate execution
• Manage team capacity, remove blockers, and ensure consistent delivery
• Serve as the primary point of accountability for development execution and quality
• Partner with Delivery, Architecture, DevOps, and Security teams for alignment and signoffs
• Act as the voice of the development team to stakeholders
• Contribute actively to the codebase (C#, VB.NET, ASP.NET Core)
• Perform code reviews and enforce coding standards and testing practices
• Lead development of new features while supporting and improving legacy systems
• Use modern tooling, including CI/CD pipelines and AI-assisted development workflows

Benefits

• We Value: Honest, open, frequent, and clear communication
• Honoring commitments and meeting goals and deadlines
• Curiosity, passion, and intellect
• Supporting, teaching, learning, and succeeding together
• Preparation, engagement, responsiveness, and highly efficient use of time and resources
• Being the best at what we do

What This Job Offers

• Job Type: Full-time
• Career Level: Senior