Software Engineer IV

Software Engineer IV, Viper Engineering

Req #6336

Virtual

Buffalo, NY, USA

Job Description

Posted Tuesday, August 11, 2026 at 9:00 a.m.

If you are looking for a career at a dynamic company with a people-first mindset and a deep culture of growth and autonomy, ACV is the right place for you! Competitive compensation packages and learning and development opportunities, ACV has what you need to advance to the next level in your career. We will continue to raise the bar every day by investing in our people and technology to help our customers succeed. We hire people who share our passion, bring innovative ideas to the table, and enjoy a collaborative atmosphere.

Who we are

ACV is a technology company that has revolutionized how dealers buy and sell cars online. We are transforming the automotive industry. ACV Auctions Inc. (ACV), has applied innovation and user-designed, data driven applications and solutions. We are building the most trusted and efficient digital marketplace with data solutions for sourcing, selling and managing used vehicles with transparency and comprehensive insights that were once unimaginable. We are disruptors of the industry and we want you to join us on our journey. Our network of brands include ACV Auctions, ACV Transportation, ClearCar, MAX Digital and ACV Capital within its Marketplace Products, as well as, True360 and Data Services.

At ACV we focus on the Health, Physical, Financial, Social and Emotional Wellness of our Teammates and, to support this, we offer:

Multiple medical plans including a high deductible, low cost health plan

Company-sponsored (paid) Short-Term Disability, Long-Term Disability, and Life Insurance

Comprehensive optional benefits such as Dental, Vision, Supplemental Life/AD&D, Legal/ID Protection, and Accident and Critical Illness Insurance

Generous paid time off options, including uncapped vacation days, the greater of 3 paid sick days or in accordance with the applicable state or local paid sick leave law, 6 paid company holidays, 2 floating holidays, parental leave, bereavement leave, jury duty leave, voting leave, and other forms of paid leave as required by applicable law or regulation

Employee Stock Purchase Program with additional opportunities to earn stock in the Company

Retirement planning through the Company’s 401(k)

Who we are looking for

ACV Auctions is looking for a Software Engineer to join our MAX Engineering team and work on our SaaS Product, MAX Digital. The position will focus on backend development & maintenance of C#, ASP.NET features & services hosted in AWS and utilizing SQL Server.

The ideal candidate has a strong background and proven track record of architecting and designing enterprise applications in C#, ASP.NET and SQL Server, a penchant for high quality code, and a team minded approach to development.

What you will do

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.

What you will need

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.

#LI-AM3

Our Values

Trust & Transparency | People First | Positive Experiences | Calm Persistence | Never Settling

At ACV, we are committed to an inclusive culture in which every individual is welcomed and empowered to celebrate their true selves. We achieve this by fostering a work environment of acceptance and understanding that is free from discrimination. ACV is committed to being an equal opportunity employer regardless of sex, race, creed, color, religion, marital status, national origin, age, pregnancy, sexual orientation, gender, gender identity, gender expression, genetic information, disability, military status, status as a veteran, or any other protected characteristic. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. If you have a disability or special need that requires reasonable accommodation, please let us know.

For information on our collection and use of your personal information, please see our Privacy Notice.

No immigration or work visa sponsorship provided for this position.