Job Title: Senior .NET Developer – Modernization Lead
Location: Everett, MA 02149
Duration: 6 Months (Contract)
"Navitas Partners, LLC" is seeking a highly experienced Senior .NET Developer – Modernization Lead to drive architectural evolution, modernization initiatives, and delivery resilience across enterprise C#/.NET applications supporting critical business operations.
This role partners closely with Business Analysts, Product Owners, and technical leadership to design secure, scalable, and maintainable solutions aligned with organizational objectives. The ideal candidate will serve as a senior technical voice within an Agile environment, guiding modernization strategy, reducing legacy system risk, and improving performance and operational reliability.
Lead architectural design, development, and modernization across C#/.NET applications
Own modernization initiatives including legacy refactoring, cloud readiness, and resiliency improvements
Translate complex business requirements into scalable technical solutions
Establish and enforce architectural standards, coding guidelines, and design patterns
Reduce technical debt and systemic risk through structured remediation planning
Coordinate cross-team integrations and service interactions
Mentor engineers through design reviews, code reviews, and modernization best practices
Design and govern secure, scalable RESTful APIs and backend services
Lead root-cause analysis for complex production issues and implement long-term solutions
Collaborate with QA and DevOps to enhance automation, release quality, and deployment confidence
Contribute to operational readiness, monitoring strategies, and production stability
Identify and proactively mitigate architectural and delivery risks
Bachelor’s degree in Computer Science, Information Systems, Engineering, or related field (or equivalent experience)
7+ years of professional experience developing enterprise applications using C# and .NET (Framework and .NET Core / .NET 6+)
Proven experience leading architectural decisions in complex or legacy environments
Strong expertise in ASP.NET MVC and API-driven architectures
Advanced Microsoft SQL Server (2012+) experience, including:
Performance tuning
Indexing strategies
Query optimization
Execution plan analysis
Deadlock troubleshooting
Demonstrated experience modernizing legacy monolithic systems
Experience designing secure RESTful APIs with JWT, OAuth, and claims-based authentication
Experience implementing structured logging, monitoring, and observability in production environments
Strong knowledge of dependency injection, middleware pipelines, async/await, background services, and distributed processing
Working knowledge of SPA architecture and modern frontend frameworks (Angular or React)
Experience mentoring developers and influencing technical standards in Agile environments
Proficiency with Git-based source control and CI/CD pipelines
Ability to identify systemic risk and deliver sustainable technical solutions
Experience in public-sector or regulated environments (CJIS, HIPAA, FERPA, SOC2, etc.)
Experience in matrixed or cross-agency environments
Familiarity with cloud platforms and cloud-native architectures
Experience leveraging LLMs or automation tools to enhance engineering productivity
For more details reach at resumes@navitassols.com
About Navitas Partners, LLC: It is a certified WBENC and one of the fastest-growing Technical / IT staffing firms in the US providing services to numerous clients. We offer the most competitive pay for every position. We understand this is a partnership. You will not be blindsided and your salary will be discussed upfront.