Senior Full-Stack Identity & Auth Platform Engineer

Alpaca; United Kingdom; On-site; GBP 90,000 - 125,000; Full time

Benefits offered by this job

New Hire Home-Office Setup: USD $500

Brex Card monthly stipend: USD $150

Stock Options

Health benefits from day 1

Supplemental health care

Job summary

Alpaca is seeking an experienced Senior Full Stack Engineer for the Platform Team to build and operate authentication, authorization, and IdP systems powering user login across APIs, customer products, and internal tools. You will primarily write Go backend services, with meaningful React/TypeScript work for auth UIs and occasional Java for IdP extensions.

Responsibilities include end-to-end ownership, deploying and monitoring identity services, and collaboration with other teams to evolve login

Qualifications

• 5+ years of experience writing code in strongly-typed languages, with at least 1 year in Go
• Experience building web apps with React and TypeScript
• 3+ years on systems at scale
• Knowledge of OpenID Connect, SAML, JWT and identity providers
• Experience with OpenAPI-driven HTTP APIs
• RBAC and secure access across products
• Familiarity with PostgreSQL, Kubernetes and Helm
• Experience with Kafka and observability stacks (Prometheus/Tempo)

Responsibilities

• Develop and operate Alpaca’s authentication, authorization, and IdP systems
• Write Go backend services, gRPC/REST APIs, and shared libraries
• Work on React/TypeScript auth-related UI
• Deploy, monitor, and troubleshoot identity services in production
• Collaborate with other teams on identity and access integration
• Maintain code quality, write tests, and participate in code reviews
• Handle incidents and participate in on-call rotations
• Modernize legacy authentication patterns as the platform evolves
• Own end-to-end delivery from requirements to deployment and follow-up

Skills

Go

React/TypeScript

Java

Kubernetes

Helm

PostgreSQL

OpenID Connect

SAML

JWT

OpenAPI

RBAC

Kafka

Grafana/Prometheus

Keycloak

Tools

Kubernetes

Helm

Kafka

Grafana

Prometheus

Job description

Alpaca is seeking an experienced Senior Full Stack Engineer for the Platform Team to build and operate authentication, authorization, and IdP systems powering user login across APIs, customer products, and internal tools. You will primarily write Go backend services, with meaningful React/TypeScript work for auth UIs and occasional Java for IdP extensions.

Responsibilities include end-to-end ownership, deploying and monitoring identity services, and collaboration with other teams to evolve login