Build High-Performance APIs That Scale
I design and develop custom REST and GraphQL APIs using Django and FastAPI that handle millions of requests with exceptional reliability. Whether you need to modernize legacy systems, build new microservices, or scale existing APIs, I deliver solutions that combine performance, security, and maintainability.
What Problems I Solve
Legacy API Modernization
Transform outdated monolithic APIs into modern, scalable microservices architectures that are easier to maintain and extend.
Performance & Scaling Issues
Identify and resolve bottlenecks that prevent your APIs from handling increased load. Achieve 45-85% improvement in response times.
Security & Compliance
Implement robust security measures including authentication, authorization, rate limiting, and SOC2 compliance requirements.
Complex Business Logic
Build APIs that handle complex business rules, data transformations, and integrations with multiple third-party services.
API Versioning & Compatibility
Design versioning strategies that allow smooth transitions and backward compatibility while introducing new features.
Third-Party Integrations
Seamlessly integrate with payment processors, authentication providers, messaging services, and other external APIs.
Value I Deliver
45-85% Performance Improvement
Optimize API response times and throughput through efficient code, caching strategies, and database optimization.
99.9%+ Uptime Reliability
Build resilient APIs with proper error handling, monitoring, and failover mechanisms that ensure high availability.
SOC2 Compliance Ready
Implement security best practices and compliance measures that meet enterprise security standards.
Cost-Effective Scaling
Design architectures that scale efficiently without exponential cost increases as traffic grows.
Reduced Technical Debt
Write clean, maintainable code with comprehensive tests and documentation that reduces future maintenance costs.
Faster Time-to-Market
Deliver production-ready APIs quickly through proven patterns, reusable components, and efficient development processes.
Real-World Implementations
Enterprise Data Migration Platform
Challenge
Following OneTrust's acquisition of Convercent, we needed to migrate terabytes of sensitive compliance data across different database schemas. The challenge involved handling 100+ custom fields, maintaining 99.9% data accuracy, and ensuring zero privacy violations during the migration process.
Solution
I designed and implemented a robust Django REST API architecture with PostgreSQL that handled complex schema transformations across 50+ data types. The solution included:
- Flexible mapping engine that could transform data structures dynamically
- Django REST Framework APIs with custom serializers for each data type
- PostgreSQL database design optimized for complex queries and relationships
- Comprehensive data validation at multiple layers
- Parallel batch processing architecture for performance
- Kubernetes-based deployment for scalability and reliability
Results
Successfully migrated 20+ enterprise clients with zero data loss incidents, accelerating time-to-value for the acquired customer base. The parallel batch processing reduced data processing time by 45% while maintaining strict data integrity requirements.
Technologies Used
High-Volume Microservices API Platform
Challenge
SecurityScorecard needed to scale their cybersecurity rating platform to handle 1M+ hourly API requests while maintaining 99.95% uptime. The system needed to support comprehensive API versioning, handle complex security data queries, and integrate with multiple data sources without performance degradation.
Solution
I architected and implemented a microservices-based API platform using FastAPI that could scale horizontally. Key components included:
- FastAPI microservices with async/await for high concurrency
- Comprehensive API versioning strategy with backward compatibility
- Intelligent caching layer using Redis for frequently accessed data
- Load balancing and auto-scaling configuration
- Comprehensive monitoring and alerting for proactive issue detection
- Extensive test suites covering unit, integration, and performance tests
Results
The microservices architecture enabled the platform to handle 3x more vendors per customer while maintaining exceptional reliability. Systems contributed to a 30% increase in API usage, demonstrating the scalability and performance of the solution.
Technologies Used
Financial Transaction Security API
Challenge
Venmo needed to strengthen authentication flows for their financial transaction systems handling millions of daily transfers. The challenge was to improve security against common attack vectors while maintaining a seamless user experience and ensuring zero downtime during deployment.
Solution
I developed a comprehensive security enhancement solution using Flask and Python that included:
- Custom Python validation decorators that prevent common attack vectors (SQL injection, XSS, CSRF)
- Flask-based REST APIs with robust input validation and sanitization
- Comprehensive QA testing framework covering 20+ edge case scenarios
- CI/CD pipelines using Kubernetes for zero-downtime deployments
- SSO workflow integration for secure authentication
- Real-time monitoring and alerting for security events
Results
The security enhancements successfully prevented fraudulent authentication attempts while maintaining seamless user experience. The comprehensive testing framework ensured reliability across all edge cases, and the CI/CD pipeline enabled zero-downtime deployments.
Technologies Used
Technologies & Tools I Work With
Frameworks
Databases & Caching
Architecture Patterns
Security & Authentication
Testing & Quality
Deployment & Infrastructure
How I Work
Discovery & Requirements
I start by understanding your business needs, technical constraints, and success criteria. This includes analyzing existing systems, identifying pain points, and defining clear project goals.
Architecture Design
I design the API architecture considering scalability, security, and maintainability. This includes database schema design, API endpoint planning, and technology stack selection.
Development & Testing
I follow agile development practices with regular updates. Code is written with comprehensive tests, proper error handling, and follows best practices for maintainability.
Deployment & Monitoring
I set up CI/CD pipelines, configure monitoring and alerting, and ensure smooth deployment to production. This includes performance monitoring and error tracking.
Documentation & Knowledge Transfer
I provide comprehensive documentation including API specifications, deployment guides, and code documentation. I also conduct knowledge transfer sessions with your team.
How We Can Work Together
Project-Based
Fixed scope and timeline for specific API development projects. Ideal for well-defined requirements and one-time implementations.
Hourly Consulting
Flexible hourly engagement for ongoing support, troubleshooting, or incremental improvements to existing APIs.
Monthly Retainer
Dedicated monthly hours for ongoing API development, maintenance, and optimization. Provides predictable costs and priority support.
Technical Consultation
Architecture reviews, code audits, performance analysis, and strategic technical guidance for your API initiatives.
Why Choose Me
10+ Years Experience
Extensive experience building production APIs for startups to Fortune 500 companies across various industries.
Fortune 500 Track Record
Proven experience working with major companies including OneTrust, SecurityScorecard, PayPal, and Venmo.
Clean, Maintainable Code
Focus on writing code that's easy to understand, test, and maintain, reducing long-term technical debt.
Security-First Approach
Security is built into every API from the ground up, not added as an afterthought.
Clear Communication
Regular updates, clear documentation, and transparent communication throughout the project lifecycle.
Proven Results
Consistent delivery of measurable improvements in performance, reliability, and cost-effectiveness.
Frequently Asked Questions
How long does a typical API development project take?
Project timelines vary based on complexity, but typically range from 4-16 weeks. A simple REST API might take 4-6 weeks, while a complex microservices platform with multiple integrations could take 12-16 weeks. I provide detailed timeline estimates during our initial consultation based on your specific requirements.
What's your approach to API security?
Security is fundamental to my API design. I implement authentication (OAuth2, JWT), authorization, input validation, rate limiting, and follow OWASP security best practices. For enterprise clients, I ensure SOC2 compliance requirements are met. Security is built in from the start, not bolted on later.
Can you work with our existing tech stack?
Absolutely. I'm experienced with Python frameworks (Django, FastAPI, Flask), various databases (PostgreSQL, MySQL, MongoDB), and cloud platforms (AWS, GCP, Azure). I can integrate with your existing infrastructure and work within your technology constraints while recommending improvements where appropriate.
Do you provide ongoing maintenance and support?
Yes, I offer maintenance packages for all APIs I build. This includes bug fixes, performance optimization, security updates, feature enhancements, and monitoring. Maintenance can be arranged as a monthly retainer or on an as-needed basis depending on your requirements.
What's included in your API deliverables?
My deliverables include: production-ready API code with comprehensive tests, API documentation (OpenAPI/Swagger), deployment configuration and CI/CD setup, monitoring and alerting setup, database schema and migration scripts, and knowledge transfer documentation. I also provide code walkthroughs and training sessions for your team.
How do you ensure API performance and scalability?
I design APIs with scalability in mind from the start. This includes efficient database queries, caching strategies, async processing where appropriate, load testing, and horizontal scaling architecture. I've built APIs handling 1M+ requests per hour with 99.95% uptime, and I apply the same principles to all projects.
Ready to Build Scalable APIs?
Let's discuss how I can help you build high-performance APIs that scale with your business.