You will get Custom Authorization Server & Resource Server Development
Project details
I specialize in developing custom Authorization Servers that adhere to industry standards while offering deep customization to meet your specific needs. Unlike off-the-shelf solutions that lack flexibility and source code access, my approach ensures full control over every aspect of your authentication system. I implement robust security measures, including OAuth2.0, JWT, and custom encryption methods tailored to your requirements. Whether you need custom parameters, specific validation rules, or additional security features, I deliver a fully customizable solution.
The Authorization Server is built with flexibility in mind, enabling you to add extra authentication flows or tighten security protocols as your needs evolve. By avoiding reliance on external software with limited customization, my solution offers a scalable and secure environment where you control every aspect, from encryption to workflow management. Regular security updates and support ensure the system remains up-to-date and resistant to vulnerabilities. This solution provides the balance between compliance, security, and complete control over your authentication infrastructure.
The Authorization Server is built with flexibility in mind, enabling you to add extra authentication flows or tighten security protocols as your needs evolve. By avoiding reliance on external software with limited customization, my solution offers a scalable and secure environment where you control every aspect, from encryption to workflow management. Regular security updates and support ensure the system remains up-to-date and resistant to vulnerabilities. This solution provides the balance between compliance, security, and complete control over your authentication infrastructure.
Programming Languages
JavaScript, Python, JavaCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$1,500
|
Standard
$2,500
|
Advanced
$4,000
|
|---|---|---|---|
| Delivery Time | 40 days | 40 days | 60 days |
Number of Revisions | 5 | 5 | Unlimited |
Number of Pages | 5 | 5 | 10 |
Design Customization | - | - | |
Content Upload | - | - | - |
Responsive Design | - | - | |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$1,000About Cristian David
Senior Full Stack Developer | Fintech & Banking Specialist | 6+ Years
Bucaramanga, Colombia - 8:16 pm local time
Enterprise-grade solutions for mission-critical applications. I specialize in secure, scalable architectures for financial institutions and e-commerce platforms where failure is not an option.
💼 Core Expertise
Backend & Architecture
Java Ecosystem: Spring Boot, Quarkus, Reactive Programming
Python: Django, Flask for rapid development
Security: OAuth2, OpenID Connect, JWT, Digital Signatures, OWASP compliance
Cloud: AWS (Lambda, API Gateway, RDS, S3, CloudFront), Azure
Infrastructure: Terraform, CloudFormation, Serverless architectures
Frontend & Integration
Frameworks: React, Angular for modern UIs
APIs: RESTful services, OpenAPI specifications
Integration: Third-party payment systems, banking cores
Database & Performance
SQL/NoSQL: Query optimization, stored procedures
Performance Tuning: Reduced execution times from 30s to 5s
Data Integrity: Transaction management for financial operations
🎯 Proven Results
Problem-Solving Excellence
✅ Memory Leak Resolution: Fixed critical asynchronous flow issues that plagued production for months - solved by identifying improper async handling causing stack structure escapes
✅ Security Vulnerability: Resolved Docker deployment vulnerabilities in AWS that blocked multiple teams - used lateral thinking and direct AWS console approach while others failed with traditional CI/CD methods
✅ Performance Optimization: Improved banking core stored procedures from 20-30 second execution to 5 seconds through query plan analysis and index restructuring
Architecture & Leadership
✅ Custom Authorization Server: Built proprietary OAuth2/OpenID Connect server for major bank, replacing expensive IBM API Connect solution - delivered full infrastructure and integration
✅ Serverless Architecture: Designed scalable solutions with WAF, CloudFront, S3, load balancers, and secure authentication flows
✅ Team Leadership: Led 5-person development teams and supported cross-functional architecture initiatives
🏦 Industry Experience
Banking & Fintech: Authorization servers, secure transfers, core banking systems
E-commerce: Scalable platforms with payment integration
Enterprise: Mission-critical applications with rigorous code reviews and security audits
🔒 Security & Compliance
Banking-grade security implementations
OWASP security standards
Secure coding practices with peer reviews
Experience with Fluid Attacks, BlackDuck, SonarQube
Rollback strategies and transaction integrity
🛠️ Development Practices
Methodologies: Agile, Scrum, story refinement
Architecture: Hexagonal architecture, Clean Code, SOLID principles
Testing: Unit testing, integration testing
Code Quality: Pair programming, rigorous peer reviews
📈 What I Deliver
Scalable architectures that handle high-volume transactions
Security-first approach for financial applications
Performance optimization that delivers measurable improvements
Complete solutions from architecture design to production deployment
Clear communication with technical documentation and process flows
💡 Perfect For:
Fintech startups needing banking-grade security
E-commerce platforms requiring payment integration
Legacy system modernization and optimization
Custom authentication and authorization solutions
Performance-critical application development
Ready to build secure, scalable solutions for your business? Let's discuss how my banking and fintech expertise can drive your project's success.
Steps for completing your project
After purchasing the project, send requirements so Cristian David can start the project.
Delivery time starts when Cristian David receives requirements from you.
Cristian David works on your project following the steps below.
Revisions may occur after the delivery date.
Authentication Flow Analysis
Analyze your company’s authentication flows, third-party apps consuming the service, and security mechanisms. Define the purpose, architecture, and integration requirements for a seamless solution.
Security Mechanisms Implementation
Implement the necessary security mechanisms, such as VPN or mTLS, for secure communication between the Authorization Server and internal servers, ensuring trusted and encrypted connections.