Job description

About us At Auctane, we are united by a passion to help businesses deliver — whatever their size, wherever they are, and however they operate. We make it possible for businesses to meet the ever-changing requirements of their industry and customer expectations. Auctane products enable hundreds of thousands of businesses to annually mail and ship billions of items — over $200 billion worth — to recipients around the globe. The Auctane family of mailing and shipping software products includes ShipStation, Stamps.com, ShipStation API, Metapack, GlobalPost, and Packlink. Our partners include Amazon, UPS, USPS, eBay, BigCommerce, Shopify, WooCommerce, and Walmart. Our values Win as One. Delight Customers. Deliver Great Outcomes. About the role We're seeking an experienced Senior Software Engineer - .NET to join our engineering team. In this role, you'll architect and build scalable backend systems that power our applications, working across our modern tech stack to deliver robust, high-performance solutions. This position is focused on the ShipStation API brand. This position is hybrid (3 days per week in office - Tuesday through Thursday) and is located in Austin, TX . What will you be doing? You'll design and implement backend services and APIs that serve millions of requests, working closely with frontend teams to create seamless user experiences. Your work will involve building new features, optimizing existing systems, and making key architectural decisions that shape our platform's future. You'll mentor other engineers, participate in code reviews, and help establish best practices across the team. System Architecture & Design : Architect, build, and maintain scalable, robust backend services and microservices using C# and .NET. API Development : Create and consume secure REST APIs for seamless communication between backend services and front-end/mobile applications. Database Management : Design, query, and optimize relational databases (both SQL and NoSQL). Code Quality & Best Practices : Conduct rigorous code reviews, enforce engineering standards, and write clean, maintainable, production-ready code. Mentorship : Provide technical guidance, support, and mentorship to mid-level and junior developers. DevOps & Cloud : Collaborate with the infrastructure team to configure CI/CD pipelines, deploy applications to the cloud (AWS), and maintain different environments. Testing : Develop and maintain unit tests and integration tests to ensure application reliability. What are we looking for? Required Technologies: .NET - Strong proficiency in .NET, including ASP.NET Core, Entity Framework Core, and building RESTful APIs. Experience with C# design patterns and async programming AWS - Hands-on experience deploying and managing services on AWS, including EC2, Lambda, RDS, S3, CloudFront, SQS and API Gateway. Familiarity with infrastructure as code (Terraform, CloudFormation or CDK) React - Some experience with front-end JavaScript component libraries such as React. Additional Skills: Background in DevOps practice Strong understanding of database design (both SQL and NoSQL) Experience with containerization (Docker) and orchestration Knowledge of authentication/authorization patterns (OAuth, JWT) Understanding of microservices architecture and distributed systems Proficiency with Git and CI/CD pipelines Experience with monitoring, logging, and performance optimization Nice to Have TypeScript Experience with event-driven architectures and message queues Knowledge of caching strategies (Redis, CDN) Background in DevOps practices We embrace AI-assisted development and expect our engineers to leverage these tools effectively. You should be comfortable using AI coding assistants (like GitHub Copilot, Claude, or similar tools) to accelerate development while maintaining code quality and security standards. Experience integrating AI capabilities into applications (OpenAI API, Claude API, or AWS Bedrock) is a plus. We value engineers who can critically evaluate AI-generated code, understand when to use these tools, and when human expertise is essential. Qualifications 4+ years of backend development experience Bachelor’s Degree in Computer Science Proven track record of building and scaling production applications Strong problem-solving abilities and attention to detail Experience mentoring junior developers Demonstrated ability to use AI tools responsibly to enhance productivity What do we offer? 🏠 We are a hybrid company. All team members at Auctane in Austin come into the office Tuesdays, Wednesdays and Thursdays. 🛬Take the reins of your time off with our Flex Time Off policy – because work-life balance should always be in your hands! 🌅 We offer 12 paid holidays for all of our US employees! 💰401k employer matching program – because your future deserves a friendly boost! ⭐️We conduct annual merit reviews to recognize and reward your hard work and achievements. 🏟️ Company events, we work hard, play hard! We do our best every day, even at our regular team-building events. 🏢 Attractive office space in the heart of central Austin, Texas (free drinks, snacks…). 🍽Indulge in weekly catered lunches at our office – a delicious perk to fuel your work. 🏐 Health and Wellness: The well-being of our team is super important to us. Choose from different options that include medical, dental, and vision plans. 🏋🏾‍♀️Fitness center in the office with Tonal Mirrors, Pelotons, free weights, etc. 🧠Employee Assistance Program. We offer up to 8 free mental health sessions. 💪🏽We offer gym discounts to help you stay fit and healthy! 📚We offer education reimbursement to all employees, ensuring that you can pursue your educational goals while excelling in your career with us. Invest in your future and let us support your growth every step of the way. 🔗 Employee Referral Program! We reward employees helping us find top talent! 💜 An inclusive, casual and upbeat work environment. The personality and opinions of each of our team members are important and valid; we aim to offer all employees a safe environment where they can be themselves and thrive. Additional Position Duties: (The following is a list of what all employees, except those with medical accommodation, may be regularly required to do.) Sit for prolonged periods of time Utilize wrist and hands for a prolonged period of time Walk short distances Stand for short periods Speaking and conversing with others Lift up to 25lbs without assistance up to chest height Equal Opportunity Employer/Veterans/Disabled If you are based in California, we encourage you to read this important information about the ShipStation Privacy Policy for California residents linked here.

Requirements

Must-haves

.NET - Strong proficiency in .NET, including ASP.NET Core, Entity Framework Core, and building RESTful APIs. Experience with C# design patterns and async programming
AWS - Hands-on experience deploying and managing services on AWS, including EC2, Lambda, RDS, S3, CloudFront, SQS and API Gateway. Familiarity with infrastructure as code (Terraform, CloudFormation or CDK)
React - Some experience with front-end JavaScript component libraries such as React.
Background in DevOps practice
Strong understanding of database design (both SQL and NoSQL)
Experience with containerization (Docker) and orchestration
Knowledge of authentication/authorization patterns (OAuth, JWT)
Understanding of microservices architecture and distributed systems
Proficiency with Git and CI/CD pipelines
Experience with monitoring, logging, and performance optimization
4+ years of backend development experience
Bachelor’s Degree in Computer Science
Proven track record of building and scaling production applications
Strong problem-solving abilities and attention to detail
Experience mentoring junior developers
Demonstrated ability to use AI tools responsibly to enhance productivity
What do we offer?
We are a hybrid company. All team members at Auctane in Austin come into the office Tuesdays, Wednesdays and Thursdays.
Take the reins of your time off with our Flex Time Off policy – because work-life balance should always be in your hands!
We offer 12 paid holidays for all of our US employees!
We conduct annual merit reviews to recognize and reward your hard work and achievements.

Nice-to-haves

Experience with event-driven architectures and message queues
Knowledge of caching strategies (Redis, CDN)
Background in DevOps practices

Application prep

Use the role’s language and application details while tailoring your materials.

Keywords to mirror

apirestsqlci/cdawsreactjavascriptdockertypescriptai

Platform: greenhouse
Effort: quick

Benefits

Benefits detected in the listing.

Dental

Vision

401k

Wellness