You will get Diagnose a Spring Boot/Keycloak issue
Project details
Are your users stuck in a login loop, receiving unexpected 401 or 403 responses, missing roles in their tokens, or experiencing problems between Keycloak, Spring Boot and React?
I will diagnose and, depending on the selected package, fix or implement one clearly defined authentication and authorization flow.
I can help with:
• Spring Boot and Spring Security configuration
• Keycloak realms, clients, roles and access settings
• OAuth2, OpenID Connect, JWT and PKCE
• React authentication and callback flows
• Invalid redirect URI and CORS problems
• Login, logout and token validation issues
• Missing roles or authorities
• Protected REST APIs and frontend routes
• 401 and 403 troubleshooting
I have more than four years of professional Java/Spring Boot experience building secure enterprise applications with Keycloak, React, PostgreSQL and Docker.
This project covers one bounded authentication flow. Custom Keycloak providers, complex SAML integrations, LDAP/user federation, social identity providers, multi-realm migrations, custom themes and production infrastructure require a separately agreed scope.
I will diagnose and, depending on the selected package, fix or implement one clearly defined authentication and authorization flow.
I can help with:
• Spring Boot and Spring Security configuration
• Keycloak realms, clients, roles and access settings
• OAuth2, OpenID Connect, JWT and PKCE
• React authentication and callback flows
• Invalid redirect URI and CORS problems
• Login, logout and token validation issues
• Missing roles or authorities
• Protected REST APIs and frontend routes
• 401 and 403 troubleshooting
I have more than four years of professional Java/Spring Boot experience building secure enterprise applications with Keycloak, React, PostgreSQL and Docker.
This project covers one bounded authentication flow. Custom Keycloak providers, complex SAML integrations, LDAP/user federation, social identity providers, multi-realm migrations, custom themes and production infrastructure require a separately agreed scope.
Programming Languages
JavaWhat's included
| Service Tiers |
Starter
$95
|
Standard
$250
|
Advanced
$550
|
|---|---|---|---|
| Delivery Time | 2 days | 4 days | 7 days |
Number of Revisions | 1 | 2 | 2 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
About Hamza
Senior Java/Spring Boot Engineer | Keycloak, OAuth2 & React
Rabat, Morocco - 5:42 pm local time
I build and troubleshoot production-grade Java/Spring Boot applications, OAuth2/OIDC integrations, and React authentication flows.
My services include:
• Java 17/21 and Spring Boot 3 REST or WebFlux APIs
• Keycloak configuration and integration: OAuth2, OIDC, JWT, PKCE, RBAC and SSO
• Spring Security and API authorization
• React and TypeScript authentication flows
• PostgreSQL, Redis, Docker and GitLab CI/CD
• Unit and integration testing with JUnit and Mockito
• Debugging, refactoring and clear technical documentation
I bring more than four years of professional experience delivering secure systems for payment, credit workflow and AI-assisted applications. I am comfortable working with existing codebases, investigating complex problems and communicating progress clearly.
For new projects, I recommend beginning with a small paid diagnostic or milestone so you receive a concrete result quickly.
Steps for completing your project
After purchasing the project, send requirements so Hamza can start the project.
Delivery time starts when Hamza receives requirements from you.
Hamza works on your project following the steps below.
Revisions may occur after the delivery date.
Technical assessment
I will inspect the supplied architecture, configuration, logs and relevant authentication code to understand the complete request flow.
Root-cause analysis
I will reproduce or trace the problem, isolate its root cause and determine whether it originates in Keycloak, Spring Security, the frontend authentication flow or the environment configuration.