Senior Software Engineer- E-Commerce & Marketplaces

Who We Are: 

We’re Cart.com, one of the fastest growing commerce enablement companies in the world. We provide the digital and physical infrastructure that empowers thousands of leading B2C, B2B and public sector organizations to unify commerce operations from product discovery to product delivery. 

We’re building toward a world where commerce has no bounds. Our enterprise-grade software, services and logistics infrastructure, including our own network of omnichannel fulfillment and distribution centers, enable merchants to navigate an increasingly complex operating landscape and drive efficient growth. 

Our goal is to be the global backbone of commerce. To achieve it, we’re looking for entrepreneurial, innovative and determined teammates who are eager to help our growing base of customers simplify their commerce operations and seamlessly reach their own customers, wherever they are. Sound like you? We’d love to hear from you. 

Cart.com Fast Facts: 

• 6,000+ customers worldwide 

• 1,600+ employees globally 

• 17 warehouses nationwide, totaling over 10 million square feet of space 

• Headquartered in Houston, TX with international offices in Mexico and Poland 

Our values: 

Cart.com is building a company that is committed to living out these 6 core values: 

• Be brand obsessed: Our lives are shaped by the brands we interact with daily. We obsess over the brands we serve, and about the things they care about. 

• Think beyond the box: “We’ve always done it that way” is not a phrase uttered often at our office. We create creative solutions to complex problems. 

• Don’t give up: We learn from our challenges and see them for what they are; great building blocks to an amazing brand story. 

• Speak up: We communicate clearly and directly because we care deeply. Communication is the bedrock of our community. 

• Work together: We’ve built a team that prides itself on diversity of thought and background. Collaboration is better with contrast. 

• Remember to be human: We work hard, but we leave room for the people, places and things that we love. 

This position is open to applicants or individuals who are located in or willing to move to AZ, CA,CO, CT,DE,FL, GA, HI, IL, IN, KY, MD, MA, MI, MS, NE, NV, NJ, NY, NC,OH, OR, PA, SC, TN, TX, UT, VA, WA. 
 

The Role:   

Cart.com’s Product Marketplaces team is seeking a Senior Software Engineer to design, develop, and optimize our marketplace technology solutions. You will play a key role in building and maintaining scalable software that powers the integration of third-party marketplaces, enabling seamless transactions for our customers. As a senior engineer, you will collaborate cross-functionally to drive technical initiatives, improve system performance, and mentor junior engineers. 

What You’ll Do: 

• Develop, enhance, and maintain marketplace integration software, ensuring scalability and performance. 

• Design and implement APIs and backend services to support marketplace connectivity. 

• Optimize database queries and backend processes to improve application efficiency. 

• Collaborate with product managers, designers, and engineers to define requirements and deliver solutions. 

• Drive best practices in software engineering, including code reviews, testing, and CI/CD deployment. 

• Troubleshoot production issues and continuously improve system reliability. 

• Mentor junior engineers and contribute to a culture of technical excellence. 

• Stay up to date with emerging technologies and marketplace trends to drive innovation. 

Who You Are: 

• A problem-solver who thrives in a fast-paced, ambiguous environment. 

• Detail-oriented with strong analytical and debugging skills. 

• Passionate about building high-performing, scalable software. 

• A strong communicator and collaborator, comfortable working across teams. 

• Adaptable and eager to learn new technologies and approaches. 

What You’ve Done: 

• 5+ years of experience in software development, with a focus on backend systems. 

• Strong proficiency in C# and .NET Core/.NET Framework. 

• Experience with SQL Server, PostgresSQL or other relational databases. 

• Hands-on experience with cloud technologies (AWS, GCP, or Azure), including managed services like RDS, EC2, and serverless computing. 

• Proficiency in designing and building RESTful APIs using ASP.NET Web API. 

• Knowledge of event-driven architectures and messaging queues. 

• Experience working with Angular for frontend development, including component-based architecture and state management. 

• Experience working in an Agile development environment (Scrum/Kanban). 

• Familiarity with DevOps practices, CI/CD pipelines, and containerization (Docker, Kubernetes). 

Nice to Haves:  

• Experience with third-party marketplace integrations (Amazon, Walmart, Shopify, etc.). 

• Knowledge of GraphQL and microservices architecture. 

• Exposure to big data processing and analytics tools. 

• Experience with Go for backend development. 

• Prior experience in a high-growth startup or e-commerce company. 

Currently, Cart.com does not intend to hire candidates who will need, now or in the future, Cart.com sponsorship through any non-immigrant visa category such as the H-1B, H-1B1, E-3, O-1, or TN. 

All hiring is contingent on eligibility to work in the United States. We are unable to sponsor or transfer visas for applicants.