Application ArchitectOnsite
Description:Diversified Systems is searching for an Application Architect with deep .NET and SQL Server expertise to design and modernize applications and provide enterprise solution architecture across Microsoft and Java-based platforms, ensuring secure, scalable, maintainable and reusable application solutions. This role leads the adoption of AI-augmented development, advanced GitHub Copilot usage across teams while accelerating delivery and upholding security, WCAG accessibility, and regulatory compliance.
Responsibilities:- Architect secure, scalable .NET (C#/ASP.NET Core) applications and SQL Server solutions using clean architecture, DDD, and performance optimization patterns.
- Develop enterprise solution architectures that span multiple applications, services, APIs, databases and integration platforms while ensuring long-term maintainability and scalability.
- Design data models, advanced T-SQL (stored procedures, indexing, partitioning, Query Store tuning), and HA/DR strategies for high-volume transactional systems.
- Define integration strategies for enterprise systems including REST APIs, messaging authentication, and data exchange between Microsoft, IBM and third-party platforms.
- Drive adoption of GitHub Copilot for .NET development, including custom instructions, prompt engineering, and AI-assisted refactoring and automated code reviews, documentation and testing.
- Produce architecture diagrams and technical specifications; lead design reviews; mentor teams on .NET patterns and Copilot best practices.
- Establish architecture standards, coding standards, reusable design patterns, and technical best practices across development teams.
- Ensure solutions meet Commonwealth IT security policies, WCAG 2.2 accessibility, PII protection, and zero-trust principles in a regulated utility environment.
- Lead the application modernization technical design efforts to migrate legacy applications into cloud native applications.
- Develop modernization roadmaps, evaluate technical debt and recommend phased migration strategies.
- Design and implement modern software delivery practices including source control strategies, branching models, CI/CD pipelines, automated deployments, environment management and DevSecOps practices.
- Evaluate emerging technologies, frameworks and commercial software products to provide recommendations aligned with the long-term technology strategy.
- Provide technical leadership during project planning, estimation, POC's and architecture review sessions.
Requirements:- 8 years of software engineering experience required.
- 4 years of Application/Solution Architect experience on enterprise .NET and SQL Server projects in complex environments required.
- Expert-level C#, ASP.NET Core, Entity Framework Core, Web API, and modern .NET practices (clean architecture, minimal APIs, DI, async/await patterns) required.
- Advanced SQL Server experience including complex T-SQL optimization, execution plans, indexing strategies, security (RLS, DDM), and Always On availability groups required.
- Daily professional experience with GitHub Copilot for .NET/C# development, including advanced configuration and team enablement required.
- Proven hands-on experience converting data from legacy systems to modernization application data models required.
- Strong secure SDLC, Entra ID/managed identities, API security, and enterprise governance experience; excellent communication and stakeholder skills required.
- Public sector, utilities, or regulated industry experience with strict compliance and accessibility mandates required.
- Familiarity with legacy modernization, IBM FileNet/BAW; Microsoft Azure Solutions Architect Expert or equivalent certifications required.
- Bachelor's degree in Computer Science, Information Systems, or equivalent required.
