Available for opportunities

Rumal Gunawardana

Associate DevOps Engineer • Kubernetes • Telecom (SMS Firewall)

Location: Sri Lanka | [email protected] | +94 789 209 595

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>Associate DevOps Engineer at Omobio, working on modernizing an Erlang-based SMS Firewall by migrating it to Kubernetes (code changes + K8s manifests, deployments, observability, reliability).
>Self-driven engineer with strong hands-on experience in VPS management, Docker, monitoring, and building production Telegram bots.
>Full-stack capability across React/Next.js, Spring Boot, and databases — able to build, deploy, and operate real systems end-to-end.

Impact At A Glance

Years Experience

Projects

Technologies

Live Metrics

Uptime

App runtime

API Latency

Browser to portfolio API

Server Region

Deployment location

Last Deploy

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Now

SMS Firewall → Kubernetes migration at Omobio

Focus:Reliability with minimal complexityPlatform:Kubernetes (Stateful workloads + services)Runtime:Erlang/BEAMOps:Monitoring, alerting, rollbacks

-Migrating an Erlang/BEAM-based SMS Firewall to Kubernetes: writing Erlang code changes for clustered/distributed behavior in K8s and creating K8s manifests.
-System implementation: deploying and configuring SMS Firewall solutions on client environments.
-Testbed implementation: maintaining test environments for validation and demonstrations.
-Handling L2 support issues, system recovery, and report generation.

Skills

DevOps / Ops

Kubernetes

Docker

Podman

Linux

Nginx

Prometheus

Grafana

Blackbox

RHEL

VPS hardening

Backend

Java

Spring Boot

Python

Erlang

.NET

PHP

Frontend

React

Next.js

React Native

HTML

JavaScript

Databases

PostgreSQL

MySQL

MongoDB

Domain

Telecom (SMS Firewall)

Prompt Engineering

AI-Assisted Development

Jira

Agile

Troubleshooting

Documentation

Experience

Associate DevOps Engineer / Associate System Implementation Engineer

Omobio (Pvt) Ltd

Dec 2025 — Present

Location: Bambalapitiya, Sri Lanka

>Drive Kubernetes migration of SMS Firewall: writing Erlang code changes for K8s clustered behavior and creating K8s manifests/YAML files.
>System implementation: deploy and configure SMS Firewall solutions on client environments.
>Testbed implementation: maintain test environments for validation and demonstrations.
>System recovery and report generation; handling L2 support issues.

Intern DevOps Engineer / Intern System Implementation Engineer

Omobio (Pvt) Ltd

Jul 2025 — Dec 2025

Location: Bambalapitiya, Sri Lanka

>Helped the team install and configure SMS Firewall solutions on client environments.
>Assisted with resolving customer issues (L2 support).
>Helped with coding issues related to the SMS Firewall GUI.

Freelance VPS Administrator & Telegram Bot Developer

Self-Employed

Dec 2020 — Present

Location: Remote

>Manage multiple VPS instances — security hardening, patching, backups, and performance tuning.
>Servers are accessed through a WireGuard VPN tunnel to a jump server; private servers are not directly exposed to the internet.
>Self-host projects like this portfolio and the Cricket Net Reservation API using Docker Compose behind an Nginx reverse proxy.
>Build and deploy Telegram bots in Python (Pyrogram/PyroFork-style workflows), including API integrations and media handling.
>Containerize services and keep them reliable with monitoring and automation.

Intern Software Engineer

Fourdiv (PVT) Ltd

Nov 2024 — May 2025

Location: Rajagiriya, Sri Lanka

>Built internal dashboards using Next.js + Spring Boot, including product/variation uploads and admin-driven employee registration.
>Integrated and customized a React order-tracking UI to match client branding and workflow.
>Helped migrate an e-commerce frontend from WooCommerce to React + Spring Boot; integrated PayHere/OnePay/KokoPay.

Projects

View all ->

Trash-Smart (3rd Year University Project)

2024

Waste management system with smart-bin fill tracking and optimized truck routing using Maps API.

Sri-Tel Customer Portal (3rd Middleware Module project)

2024

Telecom customer portal prototype with IAM, events, notifications, and automated deployment workflow.

Spring Boot (microservices)

Dine-Ease (2nd Year University Project)

2023–2024

Restaurant management system with inventory and order management for small businesses.

Advanced File Filter Bot

2024

A Telegram bot for storing and retrieving files. Users can save files and search/filter them on demand. File metadata stored in MongoDB with Redis caching for fast retrieval.

C&A Cricket Net Reservation API

2025

Backend API for a cricket net booking system with role-based access control (Admin, Manager, Customer), payment gateway integration, and live API documentation.

Spring Boot

PostgreSQL 17

Redis