Senior Java Backend Engineer — Keycloak & IAM

TechStack Global AB; Solna kommun; On-site; SEK 1,200,000 - 1,800,000; Full time

Job summary

TechStack Global AB seeks a Senior Java Developer with 12-15 years of experience in system and software development, architecture and technical troubleshooting. You will work with Java, Spring, and cloud-native microservices, delivering secure and scalable identity solutions.

Join a team focused on modern IAM platforms, Keycloak integrations, and distributed systems, using Docker, Kubernetes, and CI/CD pipelines to ship robust backend services in production.

Qualifications

• Extensive experience in Java backend development and production-grade microservices.
• Proven ability to design and implement IAM solutions with OAuth 2.0, OpenID Connect, and SAML.

Responsibilities

• Design, build, and operate IAM capabilities on Keycloak and Java microservices
• Extend Keycloak through custom SPIs, providers, user federation, and themes
• Implement and maintain authentication/authorization flows using OAuth 2.0, OpenID Connect, SAML, MFA
• Own services in production from design to deployment, observability and incident response
• Collaborate with product/security/platform teams to deliver reliable identity solutions
• Strong Java backend development experience with microservices in production
• Proven hands-on experience with Keycloak in real deployments including SPIs/providers
• Deep understanding of OAuth 2.0, OpenID Connect, JWT, SAML

Skills

Java

Distributed systems

Microservices

OAuth 2.0

OpenID Connect

JWT

SAML

Docker

Kubernetes

CI/CD

PostgreSQL

Oracle

OpenShift

Kafka

Azure

AWS

Tools

Git

Apache Maven

Eclipse IDE

IntelliJ

Subversion

Jenkins

Gradle

Docker Compose

Kibana/ELK

Keycloak

OpenLDAP

Job description

TechStack Global AB seeks a Senior Java Developer with 12-15 years of experience in system and software development, architecture and technical troubleshooting. You will work with Java, Spring, and cloud-native microservices, delivering secure and scalable identity solutions.

Join a team focused on modern IAM platforms, Keycloak integrations, and distributed systems, using Docker, Kubernetes, and CI/CD pipelines to ship robust backend services in production.