Java Back End – Senior

Genesis Digital Solutions; Lisboa; Híbrido; EUR 70.000 - 95.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Flexible hours

Hybrid work options

Professional development

Descripción de la vacante

Genesis Digital Solutions is a consulting and technology company delivering digital expertise and AI innovation across Portugal and beyond. We seek a Senior Java Backend Developer to lead design and implementation of complex Java microservices for Unified Commerce, owning IAM strategy and security practices in close collaboration with product owners and architects.

You’ll drive architectural decisions, define standards, and mentor engineers while producing ADRs and runbooks for operational

Formación

• 8+ years of professional experience in Java backend development.
• Experience designing and implementing complex microservices.
• Strong IAM experience with Keycloak and Okta.
• Knowledge of OpenID Connect (OIDC) and federation.
• Experience with code quality and security tools (SonarQube, Snyk).

Responsabilidades

• Lead design and implementation of complex Java microservices across Unified Commerce products.
• Define and enforce architectural patterns, coding standards, and security practices.
• Own the IAM strategy for Unified Commerce, including Keycloak realm design and Okta federation.
• Drive technical discussions with Product Owners and Architects.
• Identify and resolve performance bottlenecks, scalability and security issues.
• Lead code reviews and establish quality gates using SonarQube and Snyk.
• Mentor confirmed and junior engineers and share knowledge.

Conocimientos

Java backend

Microservices

Architecture patterns

IAM concepts

Keycloak/Okta

OIDC

Code quality tools

Mentoring

Documentation

Herramientas

Keycloak

Okta

SonarQube

Snyk

Descripción del empleo

Joana Figueira

Tecnologia

1

Lisboa

1200-629

Genesis Digital Solutions is a consulting and technology company that helps organizations turn ideas into measurable business impact through digital expertise and AI innovation. Founded in 2018, we operate across Portugal and the United Arab Emirates, supporting clients in multiple industries with intelligent, scalable, and secure solutions. We combine strategy, engineering, and emerging technologies such as AI, Data, Web3, and Digital Product Development to drive transformation end to end. Our focus is on building practical, human-centered solutions and long-term partnerships that enable sustainable growth, innovation, and real-world results.

We are looking for a Senior Java Backend Developer with at least 8 years of professional experience to lead the design and implementation of complex Java microservices across Unified Commerce products. You will play a key role in defining the squad's architecture, engineering standards, and security practices, while owning the IAM strategy and driving technical decisions in close collaboration with the client's product owners and architects.

What You’ll Work On

• Lead the design and implementation of complex Java microservices across Unified Commerce products.
  
• Define and enforce architectural patterns, coding standards, and security practices within the squad.
  
• Own the Identity and Access Management (IAM) strategy for Unified Commerce, including Keycloak realm design, Okta federation, and OIDC flow architecture.
  
• Drive technical discussions with the client's Product Owners and Architects, representing the engineering team.
  
• Identify and resolve performance bottlenecks, scalability challenges, and security vulnerabilities.
  
• Lead code reviews and establish quality gates, promoting the adoption of SonarQube and Snyk.
  
• Mentor Confirmed and Junior engineers, supporting their technical development and knowledge sharing.
  
• Produce technical documentation, Architecture Decision Records (ADRs), and operational runbooks.
  

What You’re Looking For

• At least 8 years of professional experience in Java backend development.
  
• Strong expertise in Java and the design and implementation of complex microservices.
  
• Experience defining and applying software architecture patterns and engineering standards.
  
• Hands-on experience with Identity and Access Management solutions, particularly Keycloak and Okta.
  
• Strong understanding of OpenID Connect (OIDC), IAM architecture, and federation flows.
  
• Experience identifying and resolving performance, scalability, and application security issues.
  
• Familiarity with code quality and security tools such as SonarQube and Snyk.
  
• Proven experience leading code reviews and establishing quality standards.
  
• Ability to lead technical discussions with business and technical stakeholders.
  
• Experience mentoring developers and supporting knowledge transfer.
  
• Strong technical documentation skills, including architecture decisions and runbooks.
  

Bonus Points

• Previous experience in Unified Commerce or complex commerce platforms.
  
• Experience working in multidisciplinary Agile squads.
  

Why You’ll Stay

• A workplace that values innovation and personal growth.
  
• Opportunities to work on high-impact projects for leading clients.
  
• Flexible hours and hybrid work options.
  
• Support for professional development, including training and certifications.