Gayan Shanaka Thejawansha

Owns the strategic development and operation of the information-security management system alongside a continuing engineering-leadership remit, including the identification and remediation of 17+ critical infrastructure risks.

• Leads the design and operation of an ISO 27001:2022-aligned ISMS, including organizational context, security objectives, risk treatment, internal-audit coordination, and management reporting.
• Established a structured assessment and treatment register that translates technical findings into prioritized controls and accountable actions.
• Automates and enforces security controls across Linux and Windows environments, focusing on access control, malware protection, encryption, privilege management, firewalling, and network auditing.
• Connects engineering, 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 27001:2022, ISMS, Risk management, Linux, Windows, Infrastructure security, Audit coordination

Leads architecture and delivery for commerce and ad-tech services, increasing merchant catalogue ingestion throughput 5x and reducing feed-processing latency 70% across onboarding, reporting, and partner integrations.

• Directs architecture and implementation for merchant catalogue ingestion, reporting services, and Google and Microsoft Shopping integrations.
• Builds backend services and data workflows with PHP/Symfony, Python, JavaScript, PostgreSQL, and Redis across Docker and Kubernetes environments.
• Introduced and improved GitHub Actions delivery pipelines plus logging, metrics, and tracing practices for 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, cost, conversion, and revenue signals used by in-house CPC optimization work.
• Leads sprint planning, code review, technical decision-making, and mentoring while partnering with product and commercial stakeholders.

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

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

• Designed technical solutions for system integration, middleware, security, and continuous-service requirements across charging-related 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, digitization, and cloudification initiatives for prepaid-loan and microservice platforms.
• Converted stakeholder requirements and production insight into architecture decisions, roadmaps, and 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 a USSD gateway for fixed connections.
• Developed APIs supporting prepaid fixed-connection services and contributed to application modernization and digitization.
• 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 processes, automation, and data changes.

• Supported the Global Technology Office governance platform through interface work, Java backend processes, and database changes.
• 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