Gayan Shanaka Thejawansha

Owns the strategic development and operation of the information security management system while continuing to provide technical leadership across engineering, infrastructure, risk management, and security governance.

• Leads the design and operation of an ISO/IEC 27001:2022-aligned ISMS, including organizational context, security objectives, risk treatment, internal audit coordination, and management reporting.
• Established a structured risk assessment and treatment register that translates technical findings into prioritized controls, accountable owners, and measurable remediation actions.
• Automates and enforces security controls across Linux and Windows environments, focusing on access control, malware protection, encryption, privilege management, firewall configuration, and network auditing.
• Coordinates engineering, information security governance, business continuity, data protection, and security awareness requirements across cloud and bare-metal infrastructure.
• Developed server fleet energy monitoring and operational reporting to improve infrastructure efficiency and management visibility.

Technologies: ISO/IEC 27001:2022, ISMS, Risk management, Linux, Windows, Infrastructure security, Audit coordination

Leads technical strategy, architecture, and engineering delivery for commerce and advertising technology services, increasing merchant catalogue ingestion throughput by 5× and reducing feed processing latency by 70% across onboarding, reporting, and partner integrations.

• Defines technical direction and leads architecture and implementation across merchant catalogue ingestion, reporting services, and Google and Microsoft Shopping integrations.
• Leads sprint planning, technical decision-making, code reviews, engineering mentoring, and collaboration with product and commercial stakeholders.
• Designs and oversees backend services and data workflows using PHP, Symfony, Python, JavaScript, PostgreSQL, and Redis across Docker and Kubernetes environments.
• Introduced and enhanced GitHub Actions CI/CD pipelines, structured logging, metrics, and tracing practices to enable faster and safer production changes.
• Diagnosed and resolved recurring Nginx and PHP-FPM container stability issues through profiling, configuration tuning, service hardening, and operational automation.
• Developed data pipelines for campaign clicks, advertising costs, conversions, and revenue signals used by internal CPC optimisation systems.

Technologies: PHP, Symfony, Python, JavaScript, PostgreSQL, Redis, Docker, Kubernetes, Nginx, GitHub Actions, Observability

Provided architecture, integration, middleware, security, and application roadmap leadership for charging platforms.

• Designed technical solutions for system integration, middleware, security, and continuous service requirements across charging projects.
• Developed and supported backend services with Java/Spring Boot, Python, PHP, JavaScript, MySQL, and Oracle Database in AWS, Kubernetes, and RHEL environments.
• Contributed to application modernization, digital transformation, cloud migration, and microservices adoption for prepaid lending and charging platforms.
• Translated stakeholder requirements and production insights into architecture decisions, technical roadmaps, and service improvement plans.

Technologies: Java, Spring Boot, Python, PHP, MySQL, Oracle Database, Kubernetes, AWS, RHEL, Bash

Delivered backend services, integrations, and modernization work for telecom charging and prepaid platforms.

• Designed technical solutions using system performance, utilization, capacity, integrity, and technology roadmap requirements.
• Contributed to an Online Charging System upgrade, supplementary application upgrades, and the implementation of a USSD gateway for fixed-line connections.
• Developed APIs supporting prepaid fixed-line services and contributed to application modernization and digital transformation.
• Built and operated Java, Spring, Python, PHP, MySQL, and Oracle services in Kubernetes and RHEL environments.

Technologies: Java, Spring, Python, PHP, JavaScript, MySQL, Oracle Database, Kubernetes, RHEL, Bash

Worked with an R&D team on internal governance platform interfaces, Java backend processes, workflow automation, and database changes.

• Supported the Global Technology Office governance platform through interface development, Java backend processes, and database modifications.
• Automated weekly and monthly workflows spanning frontend and backend processes.
• Worked with Java, MySQL, OrientDB, and system automation tooling in a collaborative R&D environment.

Technologies: Java, MySQL, OrientDB, System automation