Senior Full Stack Developer

Senior Full Stack Developer

Our client seeks a Senior Full Stack Developer to lead design and delivery of enterprise web applications across C#/.NET, Azure, SQL, and modern front end with Blazor. The role drives full lifecycle engineering, security, and performance for financial systems and integrations with ERP platforms. You will serve as a technical authority, mentor engineers, and ensure compliant, reliable solutions that support global operations.

This is a contract to hire opportunity. Applicants must be willing and able to work on a w2 basis and convert to FTE following contract duration. For our w2 consultants, we offer a great benefits package that includes medical, dental, and vision benefits, 401k with company matching, and life insurance.

Rate: $80.00 to $85.00/hr. w2

Responsibilities:

• Design, architect, and deliver scalable full stack solutions using C# (.NET 6/7/8+), ASP.NET Core, REST/gRPC APIs, and Blazor.
• Own end-to-end feature delivery including requirements analysis, technical design, implementation, testing, peer review, and production release.
• Build and maintain back-end services, API layers, business logic, data access, and event-driven components using Azure Service Bus and Event Grid.
• Develop responsive, accessible front-end interfaces aligned with UX standards and business needs.
• Apply SOLID principles, design patterns, clean architecture, and test-driven development.
• Architect and operate cloud-native solutions on Azure including App Services, Functions, AKS/Container Apps, Logic Apps, and API Management.
• Implement Azure-native data and integration patterns with Azure SQL, Cosmos DB, Azure Data Factory, and Azure Service Bus.
• Automate infrastructure with Bicep, Terraform, or ARM and implement observability with Azure Monitor, Application Insights, and Log Analytics.
• Build CI/CD pipelines in Azure DevOps to enable automated testing, deployment, and release management.
• Design and optimize T-SQL, stored procedures, views, and functions for SQL Server and Azure SQL Database.
• Perform query plan analysis, indexing, and execution optimization to meet performance SLAs.
• Collaborate on data integration patterns, reporting pipelines, and data platform architecture.
• Integrate security best practices including OAuth 2.0/OpenID Connect, RBAC, secret management with Azure Key Vault, and data encryption.
• Ensure adherence to regulatory and compliance requirements relevant to financial services and insurance operations.
• Conduct architecture reviews, threat modeling, and security design assessments.
• Serve as a technical authority, mentor developers, and lead design workshops and governance sessions.
• Translate business requirements into scalable technical designs and contribute to technical documentation and ADRs.
• Design and implement integrations with ERP platforms such as SAP, Oracle, or Microsoft Dynamics 365 Finance & Operations.
• Build secure, reliable data exchange layers including real-time APIs, batch interfaces, and event-driven pipelines for financial processes.
• Ensure data integrity and reconciliation across systems with validation, error handling, retry logic, and audit trails.
• Support ERP upgrades, module rollouts, and platform migrations with end-to-end regression and integration testing.
• Engineer solutions in SOX-compliant environments with change controls, SoD, access governance, and comprehensive audit logging.
• Maintain control documentation including data flow diagrams, control matrices, and system boundary descriptions.
• Lead root-cause analysis and post-incident reviews and maintain monitoring, alerting, and on-call readiness.
• Manage technical debt, prioritize refactoring and modernization, and support deployments with rollback strategies.

Experience Requirements:

• 10+ years of professional software engineering experience in full stack development within enterprise environments.
• 10+ years of hands-on C# and .NET development including ASP.NET Core, MVC, Web API, and middleware.
• 10+ years of SQL experience with T-SQL, SQL Server, and Azure SQL including complex queries, stored procedures, indexing, and performance tuning.
• 10+ years of Microsoft Azure experience designing and implementing cloud-native applications using PaaS and serverless services.
• Proven experience architecting and delivering enterprise web applications from inception to production at scale.
• Experience integrating enterprise applications with ERP systems such as SAP, Oracle, or Microsoft Dynamics 365 Finance & Operations via APIs, flat files, or middleware.
• Knowledge of SOX compliance requirements for IT systems including ITGC controls, audit logging, SoD enforcement, and SDLC change management documentation.
• Experience delivering data pipelines with Azure Data Factory, Azure Synapse Analytics, and/or Microsoft Fabric.
• Familiarity with data lake architecture patterns, Azure Data Lake Storage Gen2, and OneLake.
• Experience with data governance tooling such as Microsoft Purview.
• Strong analytical and problem-solving skills, clear communication, and demonstrated technical leadership and mentoring.
• Ownership mindset with focus on quality, security, and operational excellence.
• Microsoft Fabric experience (preferred).
• Knowledge of IFRS or GAAP and related data model design and reconciliation logic (preferred).
• Experience in reinsurance, insurance, or financial services data domains (preferred).
• Experience designing SOX-compliant SDLC processes within Agile frameworks (preferred).
• Microsoft certifications such as AZ-204 or AZ-305 (preferred).
• Familiarity with Domain-Driven Design, CQRS, and event sourcing (preferred).
• Experience with Cosmos DB, Azure Synapse Analytics, or Azure Data Factory for data integration (preferred).
• Familiarity with GraphQL, gRPC, or SignalR for advanced APIs and real-time communication (preferred).
• Contributions to open-source projects or reusable shared libraries (preferred).
• Experience in Agile/Scrum with SAFe or equivalent scaled agile frameworks (preferred).

Education Requirements:

• Microsoft Azure certifications such as AZ-204 (Azure Developer Associate) or AZ-305 (Solutions Architect Expert) (preferred).