SpruceID builds privacy-preserving, standards-based digital identity and credentialing solutions that give individuals control of their information while enabling governments and enterprises to deliver secure, interoperable services. We partner with public-sector organizations to modernize how identity is issued, verified, and used. As a Mobile Engineer , you will sit at the intersection of engineering, customer delivery, and digital identity. You will work directly with state governments and other public-sector partners to design, build, and deploy mobile-first identity solutions , often serving as the primary technical representative of SpruceID in the field. This role combines hands-on Flutter development with consulting, systems design, and customer success. You will ensure SpruceID’s mobile technology is deployed securely, effectively, and with lasting real-world impact. This job is fully remote within the US. What You’ll Do • Lead the design and development of mobile applications for state governments and enterprise customers using Flutter • Work side-by-side with customer delivery leads, backend engineers, and UX designer to ensure successful deployments • Translate customer and policy requirements into secure mobile architectures and production-ready implementations • Act as a trusted technical advisor to public-sector partners, guiding them through mobile security, identity standards, and best practices • Build and ship privacy-preserving mobile applications that meet public-sector requirements for security, accessibility, and compliance • Integrate mobile applications with backend identity services, cryptographic libraries, and platform APIs • Contribute to shared Rust or cross-platform libraries that run across backend services, mobile devices, and the browser • Support customer deployments, debugging, and operational needs in real-world environments • Represent SpruceID directly with partners during pilots, launches, and ongoing engagements Qualifications • 5+ years of experience shipping production mobile applications • Strong experience building Flutter applications for iOS and Android • Proven ability to lead mobile architecture and deliver secure, production systems • Experience integrating mobile apps with backend services and APIs • Familiarity with mobile security concepts (secure storage, key management, authentication flows) • Excellent communication skills and experience working directly with customers, ideally in a consulting or delivery-focused role • Based in the US and excited to engage directly with state government partners Bonus Qualifications • Experience with digital identity , verifiable credentials, DIDs, or authentication systems • Background in cryptography, data privacy, or secure mobile systems • Prior experience working on public-sector or government software projects • Familiarity with Rust or interoperating with Rust-based mobile libraries • Experience meeting accessibility standards (WCAG, mobile a11y)