C# .Net Software Engineer

Salary range: $84,723.57 - $135,000.00. This position is bonus and/or commission eligible. The Role We are seeking a Software Engineer who is passionate about building new services, database modernization, performance optimization, and strategic refactoring of mission-critical systems. You will be a key member of a squad within the Casualty 3rd Party Integration Team, working on the platform that powers claims management integrations supporting millions of transactions and billions of dollars in claims. This role balances greenfield service development with legacy modernization. Key Responsibilities Greenfield Service Development (40%) Design and build new backend services using Clean Architecture, CQRS, and domain-driven design (DDD) principles Implement anti-corruption layers (ACL) to isolate new services from legacy system dependencies Create well-defined APIs and service contracts for integration workflows Apply bounded context design to ensure clear domain boundaries and service autonomy Write clean, testable code with comprehensive unit and integration test coverage Database Engineering & Modernization (35%) Analyze, optimize, and decompose complex stored procedures into smaller, testable, well-documented units Perform query tuning, indexing strategy, execution plan analysis, and optimize data-access patterns at scale Design backward-compatible schema changes with safe rollout/rollback patterns Create facades, wrappers, and anti-corruption layers around stored procedures to enable gradual extraction of business logic into services Operational Excellence & Integration Support (25%) Build and maintain integration services for data exchange and workflow orchestration Implement performance baselines, regression detection, and alerting for data-intensive workflows Participate in incident response for data/performance-related production issues Create diagnostic tooling and runbooks to reduce time-to-resolution Collaborate with SRE/DevOps on deployment safety (blue/green, feature flags, canary releases for schema changes) Requirements Technical Skills Must-Have 4+ years of professional software development experience in C#/.NET Solid SQL Server knowledge: query optimization, stored procedure/function/trigger development, database design and normalization, performance tuning, indexing strategies, transaction isolation levels, locking, and concurrency management Experience with Clean Architecture, Domain-Driven Design (bounded contexts, aggregates, entities, value objects, repositories), and Anti-Corruption Layer Proficiency in C# and .NET Framework/.NET Core (legacy and modern) Experience refactoring established, production systems while maintaining stability SQL source control (migrations, version control for schema/stored procedures) Unit testing frameworks (xUnit, NUnit) and writing testable code Highly Desired Experience with strangler fig and facade patterns in practice Hands-on experience migrating logic from stored procedures to service layer in production systems Pattern experience with CQRS Azure SQL Database, Azure DevOps, Observability tools (Application Insights, SQL Profiler) API design and versioning (REST, OpenAPI/Swagger), microservices architecture, event-driven patterns Knowledge of ORMs (Entity Framework Core, Dapper) and when to use native SQL Azure services (Event Hubs, Azure Functions, Azure Storage), PowerShell for database scripting/automation Container-based deployments (Docker, Azure Container Apps) Nice to Have AI-assisted development experience (GitHub Copilot, ChatGPT, or similar) Python scripting, data analysis, automation, or tooling SQL Agent jobs and automated workflow patterns Benefits 401(k) Match Paid time off Annual Incentive Plan Performance Bonus Comprehensive health insurance Adoption Assistance Tuition Reimbursement Wellness Programs Stock Purchase Plan options Employee Resource Groups If you require reasonable accommodation to complete a job application, please contact (800) 621-8070. J-18808-Ljbffr