C# .Net Software Engineer

CCC Intelligent Solutions•Chicago, IL

About The Position

CCC Intelligent Solutions Inc. (CCC) is a leading cloud platform for the multi-trillion-dollar insurance economy, creating intelligent experiences for insurers, repairers, automakers, part suppliers, and more. At CCC, we’re making life just work by empowering more than 35,000 businesses with industry-leading technology to get drivers back on the road and to health quickly and seamlessly. We’re pushing boundaries with innovative AI solutions that simplify and enhance the claims and repair journey. Through purposeful innovation and the strength of its connections, CCC technologies empower the people and industry relied upon to keep lives moving forward when it matters most. 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. You will build new services using Clean Architecture and domain-driven design principles while also refactoring existing database-centric logic into maintainable, service-oriented solutions. Strong SQL Server skills are essential, but this is not exclusively a database role — you will write C#/.NET services, design APIs, and build integration capabilities.

Requirements

4+ years of professional software development experience in C#/.NET
Solid SQL Server knowledge: Query optimization (execution plans, index tuning), Stored procedure, function, and trigger development/refactoring, Database design and normalization, Performance tuning (complex joins, aggregations, multi-million row tables), Understanding of indexing strategies (clustered, non-clustered, filtered, columnstore), Transaction isolation levels, locking, and concurrency management
C# and .NET Framework/.NET Core (legacy and modern)
Clean Architecture — experience structuring applications with clear separation of concerns (Domain, Application, Infrastructure, Presentation layers)
Domain-Driven Design (DDD) — practical experience with bounded contexts, aggregates, entities, value objects, and repositories
Anti-Corruption Layer (ACL) — experience building isolation boundaries between legacy systems and new services
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

Nice To Haves

Experience with strangler fig and facade patterns in practice
Hands-on experience migrating logic from stored procedures → service layer in production systems
CQRS (Command Query Responsibility Segregation) pattern experience
Azure SQL Database, Azure DevOps experience
Observability tools (Application Insights, SQL Profiler)
API design and versioning (REST, OpenAPI/Swagger)
Experience with microservices architecture and event-driven patterns
Familiarity with Entity Framework Core, Dapper, or other ORMs — and knowing when to use native SQL instead
Azure services (Event Hubs, Azure Functions, Azure Storage)
PowerShell for database scripting/automation
AI-assisted development — experience using AI coding tools (GitHub Copilot, ChatGPT, or similar) to accelerate development workflows, code generation, and problem-solving
Python — scripting, data analysis, automation, or tooling
SQL Agent jobs and automated workflow patterns
Experience with container-based deployments (Docker, Azure Container Apps)

Responsibilities

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
Analyze, optimize, and decompose complex stored procedures into smaller, testable, well-documented units
Query tuning, indexing strategy, execution plan analysis, optimizing 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
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)