Andersen is hiring a
Senior Backend Engineer (Identity & Access Management)

for a project building a scalable distributed platform and delivering reliable backend solutions.

Our customer

is an international organization operating in the financial and protection services domain. The company provides a diverse portfolio of customer-oriented solutions across multiple business areas and markets. With a strong focus on digital capabilities, operational excellence, and long-term development, the organization continuously invests in technology, process improvement, and service innovation to support evolving customer and business needs.

The project

focuses on building and evolving a high-performance, scalable distributed platform designed to support complex business operations and rapid product growth. The system is developed in Go, with a strong emphasis on efficient concurrency models, reliability, and long-term maintainability.

Responsibilities:
- Designing, developing, and operating high-throughput, low-latency identity services: Single Sign-On (SSO),



Multi-Factor Authentication (MFA), session management, and federation.
- Owning features end-to-end from design through production and support.
- Implementing and scaling modern authentication and authorization protocols and token formats (OAuth 2.0, OpenID Connect, JWTs), including secure token issuance, rotation, and revocation strategies.
- Writing clean, concurrent, and highly performant backend services primarily in Go.
- Designing idiomatic, testable code and clear API contracts (gRPC/HTTP).
- Using DevOps experience to deploy, manage, and automate identity infrastructure (CI/CD, monitoring, and incident response).
- Serving as the subject matter expert on authentication and identity: owning internal security reviews, threating modeling for identity flows, and guiding other teams on secure integrations with the platform.
- Integrating and maintaining solutions with custom and standard identity providers (e.g. K

📌 Senior Backend Engineer (España)
🏢 Andersen Lab
📍 España