Okan Akvec

VALENSPARA

Architecting payment orchestration engines and high-throughput microservices.

OBSS

Architected and scaled a high-volume Payment Facilitator platform, managing mission-critical microservices and system reliability.

• •Led a team of backend engineers to deliver a payment platform processing 100K+ daily transactions with 99.99% uptime.
• •Owned system architecture and technical direction for mission-critical microservices, ensuring scalability and resilience under peak load.
• •Drove latency reduction initiatives, achieving ~25% improvement through asynchronous processing and architectural optimizations.
• •Led containerization and Kubernetes adoption, improving infrastructure efficiency by 30% and enabling faster deployments.
• •Defined database optimization strategies for PostgreSQL, reducing query response times by ~40% across critical services.
• •Established observability standards (Grafana, Elasticsearch, Graylog), reducing production incidents by 35% and improving MTTR.
• •Mentored and grew engineers, improving team velocity by 15% and establishing strong code quality and review practices.
• •Defined and enforced idempotency and data consistency strategies across services (Redis + DB), reducing financial risk and duplicate transactions.

Payten

Led the development of high-volume payment solutions and orchestrated agile processes for mission-critical financial systems.

• •Developed Spring Boot microservices for Apple Pay, Google Pay, and VPOS, handling millions of monthly transactions.
• •Optimized 3D-Secure applications for major banks, significantly improving transaction reliability and auth flows.
• •Served as Scrum Master for a team of 9, achieving 95% sprint goal completion and fostering Agile excellence.
• •Integrated RESTful/SOAP APIs and implemented CI/CD pipelines, reducing deployment time by 40%.
• •Mentored junior developers on secure coding practices and unit testing to ensure high-quality delivery.

Havelsan

Developed and maintained mission-critical Java systems for Naval Combat Management Systems (CMS).

• •Integrated radar, sonar, and weapon control components into a unified real-time environment.
• •Designed satellite-based communication subsystems for secure, low-latency data exchange.
• •Automated ASTERIX protocol handling with a custom Java code generator, reducing manual errors by 40%.
• •Managed mission-critical software modules in Linux (CentOS) environments with Agile/Jira workflows.

Guru

Developed Spring Boot services and distributed system integrations.