About Me
Professional Summary
IT Infrastructure & Operations Engineer with 5+ years of experience delivering L2/L3 support, service reliability, and automation across global enterprises. Proven expertise in managing mission-critical
systems supporting 30M+ users, consistently achieving 99.99% uptime and reducing MTTR by 35%. Strong technical proficiency in cloud platforms (AWS, Azure), DevOps tools (Docker, Kubernetes, Terraform),
and data analytics (SQL, Python, Power BI, Tableau). Adept at driving process optimisation through automation and data-driven insights while effectively communicating with stakeholders at all levels.
Additionally, bring years of leadership experience in retail and operations management, with accountability for multi-site operations, large teams, and full P&L ownership. Recognised for delivering
sales growth, operational efficiency, and cost reductions by implementing strategic initiatives and embedding high-performance, customer-centric cultures. Skilled at turning underperforming teams into top
performers and leveraging analytics to optimise service delivery, staffing, and inventory.
Currently based in the London, United Kingdom with full working rights, offering a rare combination of technical depth and commercial
leadership to deliver measurable impact across IT and operations.
- Phone: +4473 9275 6406
- Email: randulajayarathna@gmail.com
"Let's build smarter solutions together! I value professional connections, so feel free to reach out."
My Resume
Education
MSc in Data Science
Sep 2022 - Aug 2024
University of Gloucestershire, United Kingdom
Achieved a merit classification
- Python Notebooks and Scripting
- Data Analysis and Visualisation Principles
- Applied Data Analysis Techniques for Business
- Machine Learning and Optimisation
BSc (Hons) in Software Engineering
Oct 2016 - Dec 2019
University of Plymouth, United Kingdom
Graduated with Second Class Honors Upper Division
- Databases and their Applications
- Advanced databases and their applications
- Network and System Administration
- Software Engineering for the Internet using Java
- Web Development Platforms
- API Software Development
- IT Legislation and Ethics
Certificate in Computer Science
Oct 2015 - Feb 2016
National Institute of Business Management
GCE Ordinary Level(O/L)
2012
CERTIFICATIONS & TRAINING
Developing a Google SRE Culture by Google
2024
Statistics by Stanford University
2022
Professional Experience
Infrastructure Operations Engineer
Oct 2020 – Sep 2022
Virtusa – Colombo, Sri Lanka
- Delivered L2 system support for Mobile Number Portability (MNP) operations serving 30M+ subscribers, ensuring uninterrupted service availability across mission-critical telecom systems.
- Resolved over 150 support tickets weekly using Siebel and Remedy, maintaining a 98% SLA compliance rate and delivering timely technical assistance.
- Built real-time dashboards with Python (Pandas, NumPy, SciPy, Matplotlib) and R (ggplot2, Shiny) and REST APIs to visualise subscriber activities, enabling early trend detection, and a 35% reduction in escalations.
- Developed data pipelines and applied advanced analytics for anomaly detection, statistical ¬ling, and trend analysis of large-scale MNP logs, uncovering fault patterns and supporting predictive incident response and executive reporting.
- Optimised database performance using indexing, triggers, multi-threaded operations, and advanced sorting procedures, enhancing SQL-driven processes by 40%.
- Conducted root cause analysis for high-priority incidents, reducing Mean Time to Repair by 35%, and provided remote support for Windows and Linux applications.
- Automated log analysis and system diagnostics via CRON scheduling to decrease manual workload by 40% within 6 months.
- Managed Active Directory accounts, group policies, and permissions for over 500 enterprise users, ensuring secure and efficient access.
- Collaborated with cross-functional teams, including development and IT support, to execute seamless system deployments and upgrades aligned with ITIL best practices.
- Maintained 99.99% uptime through 24/7 on-call support and structured incident management, ensuring prompt resolution of critical application issues.
Associate Infrastructure Operations Engineer
Feb 2020 – Oct 2020
Virtusa – Colombo, Sri Lanka
- Administered L3 support for data integration applications by ensuring seamless synchronisation between global stores using BizTalk EAI tools, consistent with application support practices.
- Streamlined end-to-end data transfers by troubleshooting integration errors and optimising EAI workflows, reducing processing delays by 25% and enhancing application performance.
- Enhanced enterprise IT workflows by automating repetitive tasks with Microsoft 365 Power Automate and refining cross-team coordination through comprehensive documentation and Teams integration.
Trainee Software Engineer
Nov 2019 – Feb 2020
Co-operative Insurance Company Limited – Colombo, Sri Lanka
- Developed and optimised backend solutions for an enterprise insurance platform, ensuring high system throughput (150+ queries per minute) even during peak periods.
- Applied SQL and server-side programming to improve transaction handling, data validation, and system stability, directly enhancing customer experience.
Internship in Software Engineering
May 2019 – Nov 2019
IdeaCode Global (PVT) LTD – Colombo, Sri Lanka
Career Development & Leadership Experience
(Undertaken alongside MSc studies, UK 2022–2025)
Associate Flor Lead
May 2025 – Present
Whole Foods Market – London, UK
- Led daily operations, supplier management, and compliance, consistently exceeding sales targets and quality standards.
- Applied Power BI and advanced Excel to improve forecasting accuracy, reducing overstocking and boosting stock availability.
Multisite Team Lead
Jan 2025 – May 2025
Tesco – London, UK
- Directed café operations across multiple sites, leading 30+ staff, reducing waste by 15%, and safeguarding profit margins through tighter stock control.
Shift Manager
Jan 2023 – Dec 2024
Taco Bell – Cheltenham, UK
- Oversaw multi-shift teams in high-volume operations, optimised rotas to cut overtime by 20%, and strengthened compliance with food safety and audit standards.
AFFILIATIONS AND MEMBERSHIPS
Projects
- All
- UOP
- Virtusa
- UOG
- Personal
Spearheaded the optimisation of MNP for MTN South Africa, automating workflows that boosted efficiency by 25% and managing databases for 30M+ subscribers. Diagnosed issues from an average of 150+ Tickets per week, contributing to enhanced user experience through robust L2 support practices that drove improved client retention rates overall.
Skills & Expertise
Explore my technical toolkit across diverse domains, showcasing my expertise in operating systems, programming, database management, cloud tools, analytics, and more.
Operating Systems
Efficient in handling various operating environments to ensure seamless performance and system reliability.
- Windows
- Linux
- Mac OS
Programming Languages
Proficient in multiple languages, adept at building robust applications and automating processes.
- Python (Pandas, NumPy, SciPy, Matplotlib, PySpark, TensorFlow)
- R (ggplot2, shiny)
- Bash, Shell Scripting
- PHP, JavaScript
SQL/Database Management
Experienced in SQL queries and database architecture, optimizing performance and ensuring data integrity.
- SQL (SQL Server, MS SQL, PostgreSQL, SnowSQL)
- Oracle Database
DevOps & Cloud Tools
Hands-on experience in cloud platforms and DevOps tools to streamline deployment and manage infrastructure.
- Docker
- Kubernetes
- Git
- Apache Tomcat
- AWS
- Azure
Infrastructure as Code
Efficient in Infrastructure as Code practices to manage and provision computing infrastructure through scripts.
- Terraform
Analytics & Visualisation
Expertise in data analysis and visualisation tools to derive actionable insights and present data effectively.
- Tableau
- Jupyter Notebook
- Microsoft Excel (VLOOKUP, Pivot Tables)
ERP Systems
Familiar with ERP systems to streamline business processes and enhance operational efficiency.
- Microsoft 365
- Dynamics Business Central
Other Tools
A versatile toolkit including various tools for debugging, service management, and big data processing.
- Active Directory
- MS BizTalk
- SRE
- API Debugging
- ServiceNow
- Hadoop
Journey
