Senior Backend Engineer - On Site 5 days San Fran - up to 240K

We need a senior backend engineer with 5+ years of experience building production systems who has deep expertise in security, cryptography, and cloud infrastructure. You should be comfortable owning a platform end-to-end in a small, fast-moving team and have a track record of shipping secure, scalable backend services from scratch. Bonus points if you have experience with IoT, telematics, or fleet management systems where hardware communicates with cloud services. What you'll do: Build, develop, and maintain the complete fleet management and financing platform — backend APIs, web application, and supporting infrastructure — from the ground upCreate and implement secure authentication, authorization, and encryption mechanisms to protect sensitive vehicle and financing dataPartner with embedded and electrical teams to integrate backend services with physical on-vehicle hardware (IoT/telematics)Own and operate cloud infrastructure, CI/CD pipelines, and deployment processes as the sole owner of the backend platformConnect backend services with mobile and web-based tools for end users, internal administrators, and merchant/point-of-sale systemsDeliver technical leadership on architecture decisions, framework choices, and long-term platform strategySet best practices for code quality, testing, logging, and system observability as the platform scales Tech stack Go, TypeScript, AWS, GCP, Azure, Docker, CI/CD, MQTT, WebSockets, REST APIs, Cryptography, IoT5+ years of experience building and shipping production backend systems Work experience Built production backend systems from 0 to 1Experience with security-critical or fintech infrastructureDesigned and shipped APIs for mobile/web clientsPrior early-stage startup or high-ownership roleIoT, telematics, or hardware-cloud integration experience Education BS in Computer Science or equivalent practical experience JobID: 48410