Peter Okello

• Ownership of Voice API Development:Maintains and enhances Africastalking's Voice API, ensuring stability and scalability while delivering cutting-edge features for seamless client integration and improved user experience.
• Implemented Call Action feature for voice calls, enabling voice OTP authentication integration from clients and increasing the number of clients by 17%.
• Developed a risk hold feature to block fraudulent voice calls, enhancing call security and saving the company $1,000 monthly.
• Implemented a rate-limiting solution, reducing the risk of call spamming by 100% and boosting system performance.

• Led a team of 6 in designing a scalable payment gateway for Central/East Africa, enabling cross-border transactions in 6 countries.
• Implemented a Circuit Breaker pattern (using Resilience4j) to handle cascading failures in a distributed payment gateway system.
• Configured failure thresholds, retry policies, and fallback mechanisms, reducing inter-service dependency faults by 40% and improving system uptime.
• Integrated with Prometheus/Grafana for real-time monitoring of circuit states (OPEN/HALF-OPEN/CLOSED), enabling proactive incident response.
• Built an AuthN/AuthZ microservice with role-based access control, eliminating unauthorized access.
• Integrated New Relic + Ops Genie for real-time alerts, improving incident response by 95%.

Company Overview:

Fintech Company specializing in integration and efficiency improvements for banking systems and third-party services.

• Led team in building payment gateway, cutting customer complaints by 40%.
• Designed APIs, reducing push notification downtime to 2%.
• Integrated banking systems with ERP, reducing notification downtime to 1%.
• Developed USSD system, achieving 96% uptime and reducing complaints by 23%.
• Deployed payment system, boosting efficiency to 98%, enhancing API security by 95%.
• Built email service, increasing emails sent daily from 5,000 to 50,000.
• Built payment gateways for banks (STANBIC, ABSA), reducing complaints by 40% and achieving 98% API uptime.
• Enhanced security with JWT/OAuth, reducing breaches by 95%.