Senior Backend Engineer – DPS Core & Data Engine Squad

CCC Intelligent Solutions•Chicago, IL

About The Position

We are seeking a Senior Backend Engineer who is passionate about database modernization, performance optimization, and strategic refactoring of mission-critical systems. You will be a key member of the DPS Core & Data Engine Squad, working on the system-of-record platform that powers both internal (DPS) and external (IES) claims management experiences supporting millions of transactions and billions of dollars in claims. This is a modernization engineering role for someone who gets excited about refactoring complex stored procedures and carving out domain logic into maintainable services, optimizing SQL performance and improving system efficiency, creating safe migration patterns that enable continuous modernization while maintaining business continuity, and working in .NET codebases and evolving them into clean, testable, domain-aligned modules. If you love the challenge of strategic system evolution and want to participate in evolving the technical architecture of a multi-year transformation from monolithic database logic to service-oriented architecture—this role is for you.

Requirements

8+ years of professional software development experience in object-oriented languages (C#/.NET required)
Expert-level SQL Server knowledge (SQL Server 2019): Advanced query optimization (execution plans, index tuning, query hints)
Stored procedure, function, and trigger development/refactoring
Database design and normalization
Performance tuning at scale (multi-million row tables, complex joins, aggregations)
Understanding of indexing strategies (clustered, non-clustered, filtered, columnstore)
SQL Agent jobs and automated workflow patterns
Transaction isolation levels, locking, and concurrency management
C# and .NET Framework/.NET Core (legacy and modern)
Experience refactoring established systems while maintaining production stability
SQL source control (migrations, version control for schema/stored procedures)

Nice To Haves

Experience with strangler fig, anti-corruption layer, and facade patterns in practice
Hands-on experience migrating logic from stored procedures → service layer in production systems
Familiarity with domain-driven design (DDD) concepts (bounded contexts, aggregates, repositories)
Azure SQL Database, Azure DevOps experience
Observability tools (Application Insights, SQL Profiler)
API design and versioning (REST, OpenAPI/Swagger)
Unit testing frameworks (xUnit, NUnit) and test data builder patterns
PowerShell for database scripting/automation
Experience with microservices architecture and event-driven patterns
Familiarity with Entity Framework Core, Dapper, or other ORMs (and knowing when to use native SQL)

Responsibilities

Analyze, optimize, and decompose complex stored procedures into smaller, testable, well-documented units
Query tuning, indexing strategy, execution plan analysis, optimizing data access patterns
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
Refactor .NET Framework code supporting DPS workflows into maintainable, testable modules
Implement strangler fig patterns to incrementally move logic from database service layer while maintaining production stability
Build domain-aligned modules/services with clear contracts that enable the Domain & Services Squad to extract capabilities
Establish patterns for dependency injection, observability, and error handling in established .NET codebases
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)