Senior Fullstack Engineer (Auth Team)

• As a Senior Full Stack Engineer on the Platform Team, you will develop and operate Alpaca’s authentication, authorization, and Identity Provider (IdP) systems - the systems that handle user login, access control, and secure access across our APIs, customer products, and internal tools
• Most of your time will be spent writing Go (backend services, gRPC/REST APIs, shared client libraries), with meaningful work in React/TypeScript for auth-related UI, and occasionally Java for identity-provider extensions. You will also work with Helm charts, analyze logs and metrics, manage deployments, and help other teams to integrate with our services
• Build and improve authentication-related experiences in customer and partner web applications, including login, permissions, and credential management
• Develop and maintain the platform’s authentication, authorization, and IdP services
• Create and evolve shared libraries and SDKs
• Integrate with identity providers and keep login and access policies working reliably across products
• Deploy, monitor, and troubleshoot identity services in production
• Help modernize legacy authentication patterns as the platform evolves
• Own work end to end, from requirements through delivery and follow-up
• Collaborate with other engineering teams on identity and access integration
• Maintain high code quality, write tests, and participate in code reviews
• Help investigate incidents and bugs, including on-call rotation

Benefits

• New Hire Home-Office Setup: One-time USD $500
• Monthly Stipend: USD $150 per month via a Brex Card
• Work with awesome people, clients and partners from around the world
• Stock Options
• Medical, Dental, Vision
• Supplemental health care
• Health benefits from day 1 (internationally, this includes a stipend value to offset medical costs)

• We are looking for experienced engineers who are comfortable owning services end to end: API design, data modeling, deployments, and production debugging
• You have experience building web applications with React and TypeScript
• You have worked at least 3 years on systems at scale
• You are not afraid of taking a task from start to finish - gathering requirements, figuring out and implementing the best technical solution, then deploying and monitoring the results
• You have worked with relational databases before - we use PostgreSQL, but we are not particularly picky about this one as long as you have a solid grasp on the fundamentals
• You have worked at a startup before - you thrive in ambiguous environments, embrace changing priorities, know when to balance technical debt with speed, and proactively tackle whatever needs to get done without relying on pre-existing processes or documentation
• You have 5+ years of experience writing code in strongly-typed languages, with at least one year of experience in Go
• You know what a JWT token is, and how OpenID Connect and SAML work. Maybe you even heard about Keycloak, or have worked on authentication systems before
• You have built or maintained OpenAPI-driven HTTP APIs
• You have experience with role-based access control
• You are familiar with Kubernetes and Helm
• You have experience with Java
• You understand how Kafka works - maybe you even worked with Redpanda before
• You have experience with Grafana’s observability stack - Prometheus, Tempo and all the rest. You might have even written a PromQL query for a new alert once or twice