Sr. Software Engineer - Full Stack Web Development

About ThriftBooks  Founded in 2003 and headquartered in Tukwila, Washington, ThriftBooks is the largest online retailer of used books. With more than 800 employees and multiple distribution centers across the United States, we sell tens of thousands of books every day through thriftbooks and our marketplace partnerships. Technology is core to our success, enabling both our ecommerce platform and our large-scale logistics operations.  Position Overview  ThriftBooks is seeking a Senior Software Engineer to design, build, and maintain our primary customer-facing ecommerce applications. In this role, you will work closely with a collaborative and highly motivated engineering team to deliver scalable, high-quality software that directly supports business growth. You will contribute to technical decisions, mentor other engineers, and help shape the evolution of our platform.  What You Will Do:  Build features for thriftbooks. These are usually a mix of C#, React, and SQL Server.   Maintain performance, scalability, and reliability across thriftbooks features and infrastructure  Participate in architectural discussions and contribute to technical standards and best practices  Review code, provide constructive feedback, mentor other engineers  Troubleshoot, debug, participate in on-call rotations, and resolve production issues as needed  LOCATION  This is a hybrid position with in-person days in Tukwila, WA or remote in Phoenix, AZ.  BASE SALARY:  $120,000 - $145,000/yr. This range reflects the good-faith hiring base salary range for this position. However, individual salaries are determined by a variety of factors including, but not limited to: business considerations, local market conditions, internal equity, as well as candidate qualifications such as skills, experience, and education/training.  WHY YOU’LL LOVE IT HERE:  Annual 10% bonus incentive  Competitive compensation package  Earn Paid Time Off at Accrual Rate of 15-days per year  Six Paid Holidays per calendar year  Medical & Vision Insurance  Dental Insurance  Company paid STD/LTD  Company paid Life Insurance  401k match program  Professional development & growth opportunities  Work with nice, fun people  FREE BOOKS!    ThriftBooks is unable to provide employment visa sponsorship at this time. Applicants must be legally authorized to work in the United States. All candidates must be willing to authorize a background check. All applicants agree to ThriftBooks Privacy Notice for Employment-Related Personal Data: the employer's site  ThriftBooks is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment where all applicants are considered without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status or any other characteristic protected by applicable law. Qualifications What You Will Need:  5 or more years of professional experience developing web applications – with a preference for React, C#, SQL, Next.js  Strong experience with relational databases, including schema design, complex queries, and performance optimization  Solid understanding of full-stack web development, including strong understanding of how browsers and the internet work  Strong foundation in object-oriented programming concepts and design patterns  Preferred Qualifications  Experience with Terraform, Bicep, GitHub, Azure Devops, Azure, React, C#, SQL, CSS, Elastic, Redis.  Experience building large B2C responsive and mobile-optimized web applications.  Demonstrated curiosity and enthusiasm for learning new technologies and improving software craftsmanship  Experience with industry standard cloud platforms (AWS, Azure), CI/CD tools, and software infrastructure fundamentals