US Mobile - Full-Stack Software Engineer

• Strong full-stack engineer comfortable owning a feature from Postgres schema through WebSocket protocol to the React component the user clicks on. • Prior experience replacing or building support / messaging / chat tooling (Intercom, Zendesk, Front, LiveChat, etc.). • Deep Node.js + TypeScript experience. Strict TS, generics, discriminated unions — you reach for the type system before you reach for tests. • Strong React. Modern hooks-era React; you've shipped non-trivial SPAs and know how to keep them fast under real load. Bonus if you've worked with React Native (especially native module / push / deep-link plumbing) or built embeddable / drop-in components. • Experience with relational data modeling and SQL (Postgres preferred). You know what an index does and when it doesn't. • Comfort with real-time systems — WebSockets, pub/sub, presence, reconnection, backpressure. You understand why at-least-once delivery is a different problem from exactly-once. • Experience with queues and async fan-out (SQS, RabbitMQ, Kafka, Redis Streams). • Working knowledge of AWS and containerized deployments (EKS / Kubernetes, or equivalent). You don't need to be an SRE, but you should be able to read a Terraform plan and know what an ALB is doing. • Solid API design instincts — REST contracts, versioning, OpenAPI / typed clients, idempotency, pagination. • Care about security and compliance. You'd push back if someone proposed logging message bodies to CloudWatch. • A bias toward clean, appropriately tested code and clear written communication — specs, ADRs, PR descriptions that explain the why. • Strong communication and writing — most of our coordination is async and in-doc. • An ability and desire to help teammates grow through mentorship and code review. • Experience with React Native beyond the JS surface — bridging modules, push tokens, background state, keyboard / safe-area edge cases. • Experience designing or operating systems with CPNI / HIPAA / PCI / SOC 2 compliance constraints. • Experience with SSO / OIDC (Okta especially) and JWT-based session models that span multiple clients. • Experience operating WebSocket fleets at scale — sticky sessions, horizontal scaling, graceful reconnect. • Familiarity with Nx, pnpm workspaces, or comparable monorepo tooling. • OpenAPI-first development, zod, Vitest, Playwright, Testcontainers, k6. • Comfort writing or reading Terraform. • $130,000 - $160,000 a year • Flexible working hours • Supplemental health insurance • Professional development stipend • $500 wfh tech set-up reimbursement • Think you're a good fit? Applied to learn more! • We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.