Java backend developer for unified commerce

At Planck Technologies, we are recruiting a Senior Java Backend Developer to join an international project for a global luxury goods company, in a digital solutions development context. We are looking for a senior profile with strong technical experience in Java, microservices architecture, and identity and access management, capable of leading technical decisions, defining development best practices, and supporting the team's growth.

• Lead the design and implementation of complex Java microservices for Unified Commerce products.
• Define and ensure the application of architectural patterns, development standards, and security practices.
• Take ownership of the technical strategy for identity and access management (IAM), including the design of Keycloak realms, Okta federation, and the architecture of OIDC flows.
• Lead technical discussions with Product Owners, architects, and client stakeholders.
• Identify and resolve issues related to performance, scalability, and security vulnerabilities.
• Lead code reviews and establish quality criteria using tools such as SonarQube and Snyk.
• Mentor junior and mid-level developers, promoting technical growth and knowledge sharing.
• Produce technical documentation, Architecture Decision Records (ADRs), and runbooks.
• Contribute to defining and evolving the client's engineering standards.

• At least 8 years of experience in software development.
• Advanced experience with Java and microservices architecture.
• Knowledge of React.
• Solid experience in Identity and Access Management (IAM).
• In-depth knowledge of Keycloak, including realm design, and integration with Okta.
• Experience with OIDC and authentication flow architecture.
• Knowledge of security practices, performance optimization, and scalability.
• Experience with SonarQube, Snyk, and code review processes.
• Ability to define technical standards, make architectural decisions, and guide development teams.
• Portuguese — C1 required.
• English — C1 required.
• Must reside in Portugal.
• Availability to work on-site in Lisbon 3 days per week.
• Будет плюсом: Knowledge of SQL, Agile, and DevOps will be valued; Technical leadership and strategic thinking; Ability to analyze and solve complex problems; Excellent communication and ability to influence technical decisions; Proactivity, autonomy, and a sense of responsibility; Ability to mentor and share knowledge; Ease of collaboration in international and multidisciplinary environments

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