Software Engineer IV, Max Digital

ACV Auctions is a technology company revolutionizing the automotive industry by transforming how dealers buy and sell cars online. They are seeking a Software Engineer to join their MAX Engineering team, focusing on backend development and maintenance of their SaaS product, MAX Digital, utilizing C#, ASP.NET, and SQL Server.

Responsibilities:

• Develop APIs, services, background workers, and MVC web applications using C#, ASP.NET (including modern .NET), and an SQL database (SQL Server preferred; other relational databases such as PostgreSQL or MySQL are also acceptable)
• Design and build complex systems that can scale rapidly with little maintenance, with a strong focus on reliability, performance, and operational excellence
• Design, build, and maintain Kafka-based event processing services, including consuming, deserializing, validating, persisting, and reacting to events to drive downstream workflows
• Design and implement effective service/product interfaces, including third-party API integrations and extensible handler patterns for new integrations
• Develop and maintain application data models, including writing and tuning complex SQL queries, optimizing indexes and performance, and designing schemas that reliably support application workflows
• Own larger, complex initiatives end-to-end—from discovery and requirements through delivery and production support—driving alignment across engineering and business stakeholders
• Collaborate with software and production engineers to design scalable services, plan feature roll-out, and ensure high reliability and performance of our products
• Design and develop systems across all major departments including but not limited to; data, enterprise applications, and IT
• Lead technical design and architecture decisions across multiple systems/services, and help establish standards, patterns, and best practices
• Modify and develop custom software patterns as needed to solve highly complex software problems, and clearly document tradeoffs and long-term maintenance implications
• Be accountable for the overall performance of products and/or services within a defined area of focus, including diagnosing production issues and driving improvements
• Conduct code reviews, develop high-quality documentation, and build robust test suites for your products (unit/integration testing), ensuring maintainable and well-covered code
• Provide technical leadership through mentoring, coaching, and strong design/code review feedback, helping raise overall engineering quality
• Develop roadmaps and prioritize technical debt to effectively plan features and work, balancing delivery with long-term platform health
• Drive operational maturity (observability, incident response, on-call practices, reliability goals) and lead post-incident analysis with preventative action plans
• Handle multiple competing priorities in an agile, fast-paced environment while maintaining strong engineering discipline and delivery quality
• Perform additional duties as assigned

Requirements:

• Ability to read, write, speak and understand English
• BS degree in Computer Science or a related technical discipline or equivalent practical experience preferred
• Minimum 8 years of experience building SaaS web applications using ASP.NET, C# and JavaScript and/or Python (12+ years desirable)
• Strong experience maintaining and extending an existing codebase, adapting to pre-existing patterns and tracing the code's path of execution across services
• Strong experience integrating 3rd-party APIs, implementing authentication & authorization and developing asynchronous data flows
• Strong experience publishing and consuming Kafka events, including designing event contracts, building reliable event-driven workflows, and handling ordering, retries, idempotency, and failure recovery
• Strong experience developing unit and integration-tests, and setting expectations for test strategy and coverage
• Strong experience integrating with cloud service (AWS), specifically: SQS, SNS, S3, ECS, EKS, Lambda, ElasticSearch, Docker / Containers
• Strong experience working with Docker and Kubernetes, including containerization, orchestration (k8s) and serverless deployment scenarios
• Strong experience with build & deployment automation (CI/CD) and release workflows
• Strong SQL programming and data-layer development experience (schema design, query performance, indexing, and data reliability patterns)
• Minimum 8 years of experience working with continuous integration and build tools
• Expert in version control systems and branching/release strategies
• Expert in software engineering tooling and mentors and drives adoption for new tools and tooling standards
• Expert in release, builds, testing and the entirety of the SDLC
• Expert at debugging distributed systems using distributed tracing and other common tools; able to lead root-cause analysis and preventative improvements
• Top notch communication skills, including clearly communicating tradeoffs and aligning stakeholders
• Experience architecting and designing systems from the ground up, including making pragmatic decisions for scalability, reliability, and maintainability
• Experience working with a geographically dispersed team across multiple timezones, including leading technical alignment and delivery across teams