Full Stack Software Engineer

ABOUT CAPE Cape is America’s privacy-first mobile carrier. Our mission is to be a force for good in global wireless. Cape was founded in 2022 by people who believe privacy is a fundamental right, not a luxury to be traded away. Our journey began when our founder recognized a critical vulnerability in our modern world: everyone relies on the same stagnant cellular infrastructure and legacy systems that track our every movement, monitor and profile our connections, and lose and sell our personal data. Instead of accepting the status quo, we decided to fix it. National security professionals, journalists, parents, and everyone in between can stay connected and have privacy. We didn’t just build a layer on top of old tech; we built America’s most private and secure mobile carrier from the ground up. By building our own network from scratch, we are able to design and build a suite of privacy and security features that no other carrier on the planet can offer. Today, Cape provides our secure network to consumers, businesses, and government agencies alike. We closed our Series C in March 2026, and we are scaling rapidly, with the goal of giving people back control of their most personal information. THE TEAM At Cape, we are the architects of a privacy-centric movement that is just getting started. We are relentless builders, constantly innovating at the edge of what’s possible in telecommunications. We operate on a foundation of high trust and high expectations. As a member of our team, you will collaborate with world-class engineers, architects, and visionaries, and work across organizational lines to solve "impossible" problems and deliver mission-critical results for our users every single day. THE ROLE Cape’s platform gives customers end-to-end control of their digital identity, optimizing for resiliency, privacy, and security at every turn. We’re transforming how customers sign up, use, and think about their mobile phones and the privacy implications associated with it. Customers are protected at every level of the communications stack – from the mobile device, through contested infrastructure, to the core of the network itself. As a Full Stack Software Engineer at Cape, your mission is to provide connectivity without compromise. Your charge is to build a system that enables resilient, global connectivity with a security & privacy first mind-set that separates our users from the legacy telecom ecosystem. This includes everything from building a best-in-class signaling firewall to identify & mitigate malicious signaling attacks that compromise users' most personal communications, to detection of fake base-stations (cell-site simulators), to detecting and preventing SPAM & Smishing campaigns, and being transparent and alerting users when they may be actively targeted by hackers or nation states. Fluency across the full stack allows you to have even more ownership and agency to lead this charge. We’re hiring engineers who are passionate about solving real-world problems, personal privacy, and empowering peers to be autonomous. If you’re motivated to develop reliable, highly performant, and scalable systems, and to design robust APIs and primitives, this role offers the opportunity to make a significant impact on our products and the people who use them. Your day-to-day will constantly change and be filled with ambiguity, but everything you work on has a high impact. HERE ARE SOME WAYS YOU’LL MAKE AN IMPACT - Build beautiful, responsive and reliable websites and landing pages. - Work in Figma, and translate designs into code. - Maintain high coding standards through the development of guidelines, active participation in code reviews, and fostering a culture of continuous improvement and knowledge sharing among your team. - Champion the security, performance, and stability of our web applications. You will implement and oversee robust testing, monitoring, and release processes to guarantee a seamless and trustworthy user experience.