Java Developer

We are looking for a Senior Java / React Engineer to join a Unified Commerce team, contributing to the design and delivery of modern, scalable, and secure digital solutions.

This role combines hands-on development, architectural decision-making, technical leadership, and Identity & Access Management (IAM) expertise. You will work closely with product owners, architects, and engineering teams to shape the technical direction of strategic products.

Key Responsibilities

• Design and implement complex Java microservices.
• Define and promote architectural standards, coding best practices, and security guidelines.
• Lead IAM initiatives, including:
• Keycloak configuration and realm design
• Okta federation
• OAuth2 / OIDC authentication flows
• Drive technical discussions with stakeholders and represent the engineering team.
• Identify and resolve scalability, performance, and security challenges.
• Lead code reviews and software quality initiatives.
• Promote the adoption of tools such as SonarQube and Snyk.
• Mentor and support junior and mid-level engineers.
• Produce technical documentation, ADRs, and operational runbooks.

Requirements

Must Have

• Strong experience with Java and React.
• Experience building and maintaining Microservices Architectures.
• Solid understanding of IAM, OAuth2, OIDC, Keycloak, and Okta.
• Experience with software architecture and design patterns.
• Strong communication skills in both English and Portuguese (C1 level).
• Must be currently residing in Portugal.

The required English and Portuguese proficiency level is C1.

The location is Lisbon, with 3 days in the office. Candidates must reside in Portugal.