A broadcast system for 200,000+ customers
A communication platform that manages SMS, WhatsApp and email campaigns for the retailer's loyalty customers. Built to keep working well past 1 million.
PHPMySQLHutch SMS APIMeta WhatsApp Business API
KB.OS 2040
connecting to server0%
</>{ }=>;01#()[]&&::
kb.
Home
Independent engineer: open for projects
SYS.ONLINEKavinduBogahawatte
Building the dependable systems of 2040, today.
I build the quiet systems behind everyday things: the message that lands on a customer's phone, the order that gets approved, the app that just works.
$ now_learning --about
PHPReactKotlinNodeMySQLPython
PHPNode.jsReactNext.jsKotlinJetpack ComposeMySQLMSSQLPythonXGBoostWhatsApp APIRESTFirebaseWhisper AIPHPNode.jsReactNext.jsKotlinJetpack ComposeMySQLMSSQLPythonXGBoostWhatsApp APIRESTFirebaseWhisper AI
Whisper AIFirebaseRESTWhatsApp APIXGBoostPythonMSSQLMySQLJetpack ComposeKotlinNext.jsReactNode.jsPHPWhisper AIFirebaseRESTWhatsApp APIXGBoostPythonMSSQLMySQLJetpack ComposeKotlinNext.jsReactNode.jsPHP
What I'm good at
My 2040 workstation: code compiling, data streaming, a robot on standby.
Messaging at scale
SMS, WhatsApp and email campaigns for 200,000+ customers, built to reach 1 million.
Business workflows
Purchasing, approvals, goods receiving and quality checks turned into reliable software.
Android, AI and data
Jetpack Compose games, Whisper AI tools and an XGBoost flood-prediction prototype.
0+loyalty customers on the platform I built
0.0Mcustomers it's designed to scale to
0+personal projects
0stacks I ship in, PHP to Kotlin
Tech reactor
Hover or tap a tile. These are the tools I build with.
KBtech reactor
Hover or tap a tile to see what I use it for.
Languages
JavaKotlinJavaScriptPHPPythonC/C++
Frontend
HTML5CSS3Tailwind CSSReact.jsNext.jsResponsive UISEO
Backend and integrations
PHP REST APIsNode.jsExpress.jsWebhooksAuthenticationHutch SMS APIMeta WhatsApp Business API
Databases
MySQLMSSQLMongoDBFirebase
Mobile
Android SDKJava / KotlinJetpack ComposeFirebase
AI, data and tools
XGBoostWhisper AIDataset preparationGit/GitHubcPanelHostingerPostmanFFmpegLinux
How I can help
Pick a starting point. The button fills in the contact form for you.
Backend and REST APIs
- Clean, well-structured endpoints
- Authentication, validation and webhooks
- PHP or Node.js with MySQL or MongoDB
Messaging platforms
- SMS, WhatsApp and email campaigns
- Segmentation and scheduling
- Delivery tracking and reports
Full-stack web apps
- Next.js and React front ends
- Admin dashboards and databases
- Responsive, fast and SEO-ready
Android apps
- Native Kotlin with Jetpack Compose
- API and Firebase integration
- From first idea to a finished app
Things I've built
Scroll to move through six projects. Open one for the full story.
Swipe sidewaysPurchasing orders, from request to quality check
An internal system for creating purchase orders, approving them, receiving goods and checking quality. Built without a JavaScript framework.
HTML5Tailwind CSSJavaScriptPHP
The official ASB Fashion website
The online home of one of Sri Lanka's leading fashion retailers, with product showcases, promotions, company information and online gift vouchers.
React.jsPHPMySQLCSS
FloodMind: an early flood warning for the Kelani River
My BSc research project. I prepared the datasets, trained XGBoost models to predict water levels and flood risk, and built a working prototype.
PythonXGBoostPHP REST APIMySQL
Brainana, a maths and logic game for Android
A game built around interactive maths and logic challenges, with a modern Jetpack Compose interface.
KotlinJetpack ComposeAndroid SDK
Arrow Food, a Node.js backend
A backend-focused application covering REST API design and server-side application logic.
Node.jsExpress.jsREST API
The sketchbook
Smaller builds from the side projects.
DownVid
A video downloader
React.js, Node.js, Express.js, Python, yt-dlp, FFmpegAI Subtitle Pro
Subtitles from audio and video with Whisper AI
Python, Whisper AI, Node.js, ReactHire Us
Worker registration, ID verification and job tracking
PHP, MySQL, Java, HostingerKMD Sweet House
A business site with product showcases and admin tools
React.js, PHP, MySQL, HostingerStatusBox
An Android app for handling and saving status media
Java, Kotlin, Android SDKMediCare
A Java desktop app for patients, appointments and medicines
Java, OOP, MySQL, SMTPHow I work
From first idea to a system that keeps running.
Understand
Goals, users and constraints, in plain language.
Design
Architecture, API contract and database schema.
Build
Backend, integrations and the interface.
Test
Postman, integration and error-path testing.
Ship
Deploy, monitor and keep improving.
Ask my terminal
Type a command, or tap one below.
kavindu@kb-os:~
KB-OS 2040 · online
Type 'help' to see what I can do.
Experience
Independent Software Engineer
Freelance, based in Colombo, Sri Lanka
- Working directly with clients on backend systems, REST APIs and messaging platforms.
- Building full-stack web apps and native Android apps from first idea to deployment.
Associate Software Engineer
ASB Fashion (Pvt) Ltd, IT Department
- Turning business workflows into software, from requirements to deployment.
- Building the Purchasing Order Management System, the official website and ASB Loyal Vault, the loyalty platform.
- API integrations, database optimisation, troubleshooting and maintenance.
Software Engineering Intern
ASB Fashion (Pvt) Ltd, IT Department
- Microsoft SQL Server administration and server management.
- Built the Broadcast Management System and the Token Management System, and contributed to the Returns Management System.
BSc (Hons) Software Engineering
University of Bedfordshire, UK, with a Higher Diploma in IT at SLIIT City University, Colombo 03
G.C.E. A/L Physical Science and O/L
Mahanama College, Colombo 03
Let's build something dependable.
I'm working independently and taking on freelance projects and long-term contracts: APIs, messaging, full-stack web and Android apps. Full-time roles too, for the right team. References are available on request.