--- title: 'Senior Software Engineer - .NET at Auctane' canonical: 'https://feeny.ai/job/senior-software-engineer-net-auctane-austin-mcw142n0g1mj' type: 'job' last_seen: '2026-10-19' --- # Senior Software Engineer - .NET at Auctane - **Company:** Auctane - **Location:** Austin, TX - **Posted:** 2026-08-04 - **Last confirmed live:** 2026-10-19 - **Apply:** https://job-boards.greenhouse.io/auctane/jobs/7817425003 ## 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.](https://www.shipstation.com/privacy-policy/) ## About Auctane ## Company Overview - **One-liner**: Auctane provides AI-powered shipping and fulfillment software for businesses of all sizes, operating a portfolio of brands including ShipStation, Stamps.com, and Metapack. - **Entity Type**: Private (acquired by Thoma Bravo in 2021, recently merged with WWEX Group to form ShipStation Global as of June 2026) - **Headquarters**: Austin, Texas, United States - **Founded**: Not publicly available - **Founders**: Not publicly available ## Core Business - Primary industry: Logistics technology / Shipping and fulfillment software - Target customers: SMBs, e-commerce merchants, and enterprises (B2B and B2C) - Mission statement: To connect businesses to a world of opportunity by providing the tools and scale needed to make logistics a competitive advantage. ## Products & Services - **[ShipStation](https://www.shipstationglobal.com)**: Leading multi-carrier shipping software for e-commerce and retail businesses (SaaS). - **[Stamps.com](https://stamps.com)**: Postage and shipping solution for businesses (SaaS). - **[Metapack](https://metapack.com)**: Carrier management and delivery experience platform for retailers (SaaS/API). - **[Packlink](https://packlink.com)**: Shipping platform for small businesses and consumers (SaaS). - **[ShipEngine](https://shipengine.com)**: Shipping API for developers and platforms (API). - **[ShippingEasy](https://shippingeasy.com)**: Shipping and fulfillment software for online sellers (SaaS). - **[Endicia](https://endicia.com)**: PC postage and shipping software (SaaS/desktop). - **[ShipWorks](https://shipworks.com)**: Shipping software for order management (SaaS/desktop). - **Return Rabbit**: Returns management solution (SaaS). ## Market Standing - **Valuation/Market Cap**: Not publicly disclosed (private; acquired by Thoma Bravo in 2021 for an undisclosed sum; debt financing of undisclosed amount led by Blackstone Credit in July 2021) - **Key Metric**: Annual Revenue of approximately **$758M** (latest available) — [LinkedIn](https://www.linkedin.com/company/auctane) - **Notable Investors/Partners**: Thoma Bravo (majority owner), CVC Funds (minority stake in combined ShipStation Global), Blackstone Credit (debt financing). Carrier partners: 75+ LTL carriers, 350 regional/national/international carriers, 45,000 truckload carriers. - **Growth Signals**: In June 2026, Auctane merged with WWEX Group to form ShipStation Global, creating a combined entity with 3,500+ employees and serving 3+ million customers. Auctane’s headcount grew 19.3% YoY (812 employees). Active job postings increased 29.3% YoY — [ShipStation Global Press Release](https://www.shipstationglobal.com/press/shipstation-global/) ## Competitive Advantages - **Massive carrier network**: 45,000+ carrier partnerships and 600+ technology integrations create a deep moat in logistics connectivity. - **AI-powered automation**: The company uses machine learning to optimize carrier selection, label generation, and returns — giving SMBs enterprise-grade logistics capabilities. - **Brand portfolio breadth**: From postage (Stamps.com) to delivery experience (Metapack) to returns (Return Rabbit), Auctane covers the full shipping lifecycle. ## Strategic Focus - **Post-merger integration** with WWEX Group to build ShipStation Global as a unified intelligent logistics platform for small and mid-sized shippers. - **Deepening AI capabilities** to automate supply chain decisions and provide real-time analytics. - **Expanding global footprint** with local offices in Poland, Spain, UK, Philippines, Australia, and across the US. ## Why Work Here - **Hybrid & flexible work**: The company offers flexible and hybrid work options connecting global teams — [ShipStation Global Careers](https://www.shipstationglobal.com/careers/) - **Perks**: Competitive pay and bonuses, comprehensive medical/dental/vision, global wellness program, mental health resources, employee assistance, fitness perks, generous PTO, employee referral program, and matching charitable donations. - **Engineering culture**: Technical roles make up ~18% of the workforce (246 employees), and the company invests in security, cloud engineering, and data science. Open roles include Full Stack Software Engineer, Security Engineer, and Software Engineer Intern. - **Company values**: “We’re better together,” “Make it right,” “Play to win,” “Win as one” — emphasizing collaboration, integrity, and competitive drive. - **Global presence**: Over 60 locations worldwide, with major hubs in Austin, Dallas, London, Manila, and Zielona Gora. *Note: Employee reviews on LinkedIn rate the company 2.8/5 (210 reviews), with culture at 2.9 and career opportunities at 2.3 — potential areas to probe during interviews.* ## Sources 1. [Auctane LinkedIn Company Page](https://www.linkedin.com/company/auctane) 2. [ShipStation Global Press Release – Merger Announcement](https://www.shipstationglobal.com/press/shipstation-global/) 3. [ShipStation Global Careers Page](https://www.shipstationglobal.com/careers/) 4. [Auctane Greenhouse Jobs Board](http://job-boards.greenhouse.io/auctane) 5. [ShipStation Global Homepage](https://www.shipstationglobal.com/auctane/) ## Other roles at Auctane - [Security Engineer, Application Security](https://feeny.ai/job/security-engineer-application-security-auctane-madrid-g47qxvcmgmnw) — Madrid, Spain - [Service Specialist](https://feeny.ai/job/service-specialist-auctane-manila-880tjc3tzqkr) — Manila, Philippines - [Associate Engineering Manager](https://feeny.ai/job/associate-engineering-manager-auctane-zielona-gora-69b4g93qm371) — Zielona Gora, Poland - [Senior Software Engineer](https://feeny.ai/job/senior-software-engineer-auctane-wroc-aw-q6tr819dv92g) — Wrocław, Poland - [Senior Data Analyst](https://feeny.ai/job/senior-data-analyst-auctane-austin-9y28586eh6be) — Austin, TX - [Customer Success Coordinator](https://feeny.ai/job/customer-success-coordinator-auctane-manila-dkedp8q73dhd) — Manila, Philippines - [Support Specialist](https://feeny.ai/job/support-specialist-auctane-manila-3x6ew5ec6thf) — Manila, Philippines - [CyberSecurity - Interns](https://feeny.ai/job/cybersecurity-interns-auctane-wroc-aw-xp25y06p4npk) — Wrocław, Poland - [Field Account Manager - Austin, TX](https://feeny.ai/job/field-account-manager-austin-tx-auctane-austin-07v5w159z006) — Austin, TX - [Database Engineer](https://feeny.ai/job/database-engineer-auctane-wroc-aw-66j4vh2vpxkg) — Wrocław, Poland