Senior Software Engineer, Customs

About Flexport: At Flexport, we believe global trade can move the human race forward. That’s why it’s our mission to make global commerce so easy there will be more of it. We’re shaping the future of a $10T industry with solutions powered by innovative technology and exceptional people. Today, companies of all sizes—from emerging brands to Fortune 500s—use Flexport technology to move more than $19B of merchandise across 112 countries a year. The recent global supply chain crisis has put Flexport center stage as we continue to play a pivotal role in how goods move around the world. We are proud to have the support of the best investors in the game who believe in our mission, solutions and people. Ready to tackle global challenges that impact business, society, and the environment? Come join us. Why Customs Matters More Than Ever International trade is under more pressure than ever before. With tariffs, shifting regulations, and geopolitical uncertainty, customs has gone from a back-office function to a boardroom priority. The recent trade crisis—sparked by Trump-era tariffs—has made customs the single most complex challenge for global businesses. For many, it’s the difference between keeping supply chains moving or grinding them to a halt. That’s where we come in. The Customs Technology team at Flexport is leading the charge. We are building the systems that help entrepreneurs and global brands navigate complexity, stay compliant, and keep the world’s goods flowing. The opportunity: Customs brokerage is one of the largest, most under-innovated opportunities in logistics. Legacy customs brokers are stuck with outdated systems and manual processes—they simply can’t adapt fast enough. Flexport is growing fast because we’re different. We are the only big tech company in the space, and the only freight forwarder that got founded after the launch of Netscape. Being a tech company, we can move much faster than our competitors, and give our customers the service they expect in this day and age. We can deploy things like LLM agents at scale, in an industry that is ripe to be disrupted by this technology. Things we ❤️ Leveraging AI in a safe way to eliminate mundane work for customs brokers and automate customs every step of the way Modeling complex and ambiguous domains into fully automated workflows Building highly performant and reliable Kotlin services on our cutting-edge infrastructure platform Collaborating with end users across the globe to create the best possible product: removing toil and surfacing interesting cases You will: Work closely with business partners and product managers to distill complex business problems into elegant technical solutions. Work on systems that represent the real-world intricacies of logistics entities and the process of moving cargo in and out of countries. Build and launch products rapidly and incrementally. We ship to production dozens of times per day. Geek out about shipping, customs regulations and logistics. (We do this often.) Figure out the most efficient way for our customers and partners to participate in the process of moving freight across borders. Design and build deep, complex integrations with government agencies and partners. Automate archaic customs filing processes and save the operations team thousands of phone calls per week. Deliver supply chain insights to logistics teams via a world-class analytics experience. Create beautiful and efficient domain models for the incredibly complex world of freight forwarding. You should have: ≥ 5 years of experience writing software, and a strong engineering background. A love of simple, well-tested code that is easy to extend and hard to break. The ability to convey technical ideas in common terms to business partners, product managers, designers and engineers alike. A bias for action. When you see a problem, you solve it. A desire to develop your tooling repertoire. We are tech-agnostic regarding candidate background, but our platform is bui