Madusha
Sandaruwan
Software Engineer CTO
Based in Colombo, LK
Building software and leading engineering at a startup. I focus on architecture, infrastructure, and creating systems that are simple to understand and maintain.
What I Work On
Bridging the gap between backend systems and user experiences.
System Architecture
Designing distributed systems. I focus on event-driven architectures and microservices that handle high throughput efficiently.
Kafka Redis gRPC
Frontend Engineering
Building accessible and performant user interfaces using Next.js, React, and modern CSS.
React TypeScript Tailwind
Backend Engineering
Developing APIs and optimizing database queries for speed and reliability.
Go PostgreSQL GraphQL
DevOps & Infrastructure
Managing cloud infrastructure and CI/CD pipelines on AWS and GCP.
Docker Kubernetes Terraform
Featured Case Study
Solving complex problems with scalable architecture.
Migration
2024 // FinTech
Enterprise Event-Driven Architecture
Role: CTO / Lead Architect
The Challenge
A legacy monolithic application was facing severe scalability bottlenecks during peak transaction periods, resulting in high latency and occasional downtime. The tight coupling made feature development slow and risky.
The Solution
Designed and led the migration to a microservices architecture using .NET 8 and Azure Kubernetes Service (AKS). Implemented Apache Kafka as the backbone for asynchronous messaging to decouple services and ensure eventual consistency.
The Outcome
- → 50% reduction in infrastructure costs via auto-scaling.
- → 99.99% uptime achieved during peak load seasons.
- → 10x improvement in system throughput.
C# .NET 8 Azure AKS Kafka Redis Terraform
Kafka
Auth
Order
Pay
Inv
About Me
The human behind the code.
[Profile_IMG]
Location Colombo, Sri Lanka
Status Building a startup
Focus Engineering & Architecture
"Good software is boring. It just works, and nobody notices."
01 // Biography
I'm currently the CTO and the Co-Founder of the startup, Wirity Labs. My days are full of writing code, designing systems, and figuring out elegant solutions for complex problems. It all started back in 2013 when curiosity got the best of me. I wanted to understand how things worked at a deeper level. These days, my focus is on backend architecture and infrastructure. I enjoy working on problems that ensure systems run reliably over time.
When I'm not coding, you'll find me diving into stuff about history or philosophy. It's interesting how understanding both technical and human systems benefits from learning to see the bigger picture.
Years Experience 6+
Projects Delivered 25+
Certifications
Teams Led 3
02 // Experience
Wirity Labs
2025 – PresentCo-Founder & CTO
- Leading the technical vision and engineering strategy for a scalable SaaS product.
- Architecting a cloud-native infrastructure on AWS using microservices and event-driven patterns.
- Building and mentoring a high-performing engineering team while remaining hands-on with code.
C# .NET 9 Typescript AWS PostgreSQL React Docker
Freelance Consultant
2018 – 2025Systems Engineer
- Architected and delivered custom software solutions for international clients in e-commerce and logistics.
- Migrated legacy monolithic applications to modern microservices architectures, improving scalability.
- Provided technical consultation on cloud adoption and AI migration.
C# ASP.NET Core Azure SQL Server Next.js TypeScript
Perituza Lanka
2024 – 2025.NET Developer
- Developed internal tools for database performance benchmarking across MySQL, PostgreSQL, and SQL Server.
- Implemented CI/CD pipelines using Azure DevOps to automate testing and deployment workflows.
C# .NET Azure DevOps Docker SQL
NIBM
2020 – 2021Video Editor & Content Creator
- Produced educational video content, mastering storytelling and visual communication.
- Collaborated with creative teams to deliver high-quality media assets under tight deadlines.
Premiere Pro After Effects Adobe CC
Tech Stack
The tools I use to build reliable, scalable systems.
Languages
Frameworks
Data & Messaging
Cloud & DevOps
Selected Work
Selected projects and experiments.
Serverless Video Pipeline
2024 Cloud Engineering Serverless DevOps
Built an event-driven video processing pipeline using AWS Lambda and S3. Features automated transcoding to HLS/DASH formats with a scale-to-zero architecture that reduced infrastructure costs by 60%.
AWS Lambda / S3 / DynamoDB...
Enterprise RAG Knowledge Base
2025 AI Systems Security RAG
Developed a secure internal search engine allowing employees to query proprietary documents. Integrated Azure OpenAI with pgvector for semantic search, enforcing strict role-based access control (RBAC).
Python / FastAPI / Azure OpenAI...
Featured Posts
Technical writing on systems, architecture, and software craftsmanship.
Let's Work Together
Have a project in mind? Let's build something great.
Get in Touch
Whether you need a technical co-founder, architect, or consultant — I'm here to help build scalable solutions.
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