Senior Java oAuth Developer
Level:
Senior
Locations:
Fully Remote, Poznań, Warsaw
Technologies
Java, OAuth, Keycloak, Spring Boot
About [ The Client ]
CREALOGIX is a leading global FinTech software solutions provider working with some of the most innovative financial brands in the world. We are dynamic and growing around the world including Switzerland, Germany, Spain, the UK, the Middle East and Singapore.
Some of the world’s largest banks and wealth management firms select and deploy our advanced SaaS and cloud-based technologies to meet their customers’ needs – and it’s our people who make the difference.
About [ The Role]
We are looking for a qualified Senior Developer with strong expertise in Authentication and Authorization, with a good knowledge of English to join our team.
Your Tasks
- Design, develop, and maintain scalable and secure authentication and authorization systems
- Configure and manage Keycloak or similar IAM solutions
- Implement and manage JWT token lifecycle (generation, validation, expiration)
- Integrate and maintain second-factor authentication mechanisms within authentication flows
- Develop secure and high-performing backend services using Spring Boot and REST APIs
- Build reactive and non-blocking systems optimized for high concurrency and low latency
- Collaborate with cross-functional teams and provide technical leadership in security-related areas
- Document authentication workflows and maintain security procedures
Your qualifications:
- Proven experience in designing and implementing secure authentication and authorization systems
- Deep hands-on knowledge of OAuth 2.0, OpenID Connect (OIDC), Keycloak, and JWT token management
- Proficiency in Spring Boot, REST API development, and reactive programming (Spring WebFlux or similar)
- Experience with implementing 2FA (TOTP, SMS OTP, hardware tokens) and challenge-response mechanisms
- Strong understanding of security best practices, including secure password policies, encryption, and session management
- Familiarity with compliance standards such as GDPR, HIPAA, or PCI-DSS
- Excellent collaboration skills and the ability to mentor junior developers
- Excellent written and spoken English
Our Steps Of [ Recruitment ]
A candidate-friendly recruitment process is significant for us. We understand that candidates have busy schedules and we have streamlined our recruitment process to reflect this.
We pride ourselves on our communication and from the very beginning, we inform the candidates about all the recruitment steps and make sure they are kept up to date throughout the process.
Depending on the role you apply, the steps can slightly differ from each other but in most of the cases it looks as follows:
HR TALK
TECHNICAL INTERVIEW
MEETING WITH MANAGERS
DECISION
Our [ benefits ]
Remote or Office - Your Choice
Flexible Working Hours
Home-office Regulation
Employee Referral Programme
Private Medical Insurance
Team Events
Join Us
We create intelligent software and AI-driven solutions to automate workflows, modernize legacy systems, and sharpen your competitive edge.