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I am a person who believes in software engineering rather than development. I have a…
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Rasika Hemantha shared thisI’m happy to share that I’ve started working as Senior Software Developer at Woolworths Group.
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Rasika Hemantha shared thisOpenAI has released GPT-4. The new model can respond to images, process up to 25,000 words ect. Please check below like for more information. https://lnkd.in/gm65wjZi
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Rasika Hemantha shared thisThe new #microservices Orchestration System is at the designing.
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Rasika Hemantha liked thisRasika Hemantha liked thisEver had a test fail because of 𝗗𝗮𝘁𝗲𝗧𝗶𝗺𝗲.𝗨𝘁𝗰𝗡𝗼𝘄? When your logic depends on the current time, using DateTime.UtcNow directly can be problematic because you can’t control its value during testing. My favorite solution is to introduce an 𝗜𝗦𝘆𝘀𝘁𝗲𝗺𝗧𝗶𝗺𝗲 𝗶𝗻𝘁𝗲𝗿𝗳𝗮𝗰𝗲, making it easy to mock time in unit tests. It also centralizes time access in one place, which makes future changes much easier. An alternative is to pass DateTime as a parameter, but the interface approach is far more flexible. P.S. There's also TimeProvider as a potential approach here which was a nice addition to .NET 8. To learn more, check out my blog: https://nikolatech.net Share your thoughts in the comments below.👇 If you find this content helpful, consider following me for more daily insights! Feel free to repost to share the knowledge. ♻
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Rasika Hemantha liked thisRasika Hemantha liked thisA nice cheat sheet of different monitoring infrastructure in cloud services. This cheat sheet offers a concise yet comprehensive comparison of key monitoring elements across the three major cloud providers and open-source / 3rd party tools. Let's delve into the essential monitoring aspects covered: - Data Collection: Gather information from diverse sources to enhance decision-making. - Data Storage: Safely store and manage data for future analysis and reference. - Data Analysis: Extract valuable insights from data to drive informed actions. - Alerting: Receive real-time notifications about critical events or anomalies. - Visualization: Present data in a visually comprehensible format for better understanding. - Reporting and Compliance: Generate reports and ensure adherence to regulatory standards. - Automation: Streamline processes and tasks through automated workflows. - Integration: Seamlessly connect and exchange data between different systems or tools. - Feedback Loops: Continuously refine strategies based on feedback and performance analysis. Over to you: How do you prioritize and leverage these essential monitoring aspects in your domain to achieve better outcomes and efficiency? -- Subscribe to our weekly newsletter to get a Free System Design PDF (368 pages): https://lnkd.in/gauQcE45 #systemdesign #coding #interviewtips .
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Rasika Hemantha liked thisRasika Hemantha liked this🚀 Microservices Architecture – Explained Microservices architecture is a way of building applications as small, independent services instead of one large monolithic application. Let’s break down the diagram in simple terms: 👥 1. Clients These are the users or systems interacting with your application: 🔹Web Apps 🔹Mobile Apps 🔹Third-party systems They send requests to your backend. 🚪 2. API Gateway (Single Entry Point) Think of this as the main door of your system. It: 🔹Routes requests to the correct service 🔹Handles authentication (JWT/OAuth) 🔹Applies rate limiting 🔹Secures APIs Instead of calling services directly, clients go through the API Gateway. 🧩 3. Microservices (Independent Small Services) Each service has one responsibility: 1. User Service → Manages users & authentication 2. Product Service → Manages products & inventory 3. Order Service → Processes orders 4. Payment Service → Handles payments 5. Notification Service → Sends emails, SMS, alerts 🔹 Each service runs independently 🔹 Each can be developed independently 🔹 Each can be deployed independently 🔹 Each can scale independently 🔹 Each can use different technologies if needed This means if Payment Service is under heavy load, you scale only that service — not the entire application. 🗄️ 4. Database per Service In microservices, each service has its own database. For example: User Service → User DB Product Service → Product DB Order Service → Order DB ❗ Services do NOT directly access other service databases. They communicate only through APIs or events. This avoids tight coupling and keeps services independent. 🔄 5. Service-to-Service Communication Microservices talk to each other in two main ways: 🔹 Synchronous (REST / gRPC) Example: Order Service calls Payment Service to process payment. 🔹 Asynchronous (Kafka / RabbitMQ / Event Bus) Example: After payment success, an event is published → Notification Service sends email. ⚖️ 6. Service Discovery In dynamic environments (like Kubernetes), services may change IP addresses. A Service Registry (like Eureka or Kubernetes DNS) helps services find each other automatically. 📦 7. Containerization & Deployment Microservices are usually deployed using: 🔹 Docker (Containerization) 🔹 Kubernetes (Orchestration) 🔹 CI/CD pipelines (Automated builds & deployments) Each service runs in its own container. 📊 8. Monitoring & Observability Since multiple services are running, we need visibility: 🔹 Centralized logging (ELK / Splunk) 🔹 Monitoring (Prometheus / Grafana) 🔹 Distributed tracing (Zipkin / Jaeger) Without observability, debugging becomes very difficult. 🔐 9. Security Security is critical in microservices: 🔹 JWT / OAuth2 authentication 🔹 Role-Based Access Control (RBAC) 🔹 API Gateway security policies 🔹 Mutual TLS between services #Microservices #SoftwareArchitecture #SystemDesign #DistributedSystems #CloudNative #Kubernetes #EventDrivenArchitecture #BackendDevelopment #DevOps #ScalableSystems
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Rasika Hemantha liked thisRasika Hemantha liked this💡 .𝗡𝗘𝗧 𝗧𝗶𝗽 - 𝗠𝘆 𝗖𝘂𝗿𝗿𝗲𝗻𝘁 .𝗡𝗘𝗧 𝗟𝗶𝗯𝗿𝗮𝗿𝘆 𝗦𝘁𝗮𝗰𝗸 Currently, I’m working on a .NET project and thought I’d share the libraries I’m using day to day. Nothing experimental or trendy here — just tools that have been working well in a real codebase and helping keep things predictable and maintainable. 📌 These are the libraries in my current stack: 🔸 EF Core – For most data access and consistency 🔸 Dapper – For fast, read-heavy queries where control matters 🔸 OpenTelemetry – To get visibility into what’s happening inside the app 🔸 FluentValidation – Clean and readable validation rules 🔸 MassTransit – Handling async messaging and events 🔸 xUnit – Simple and reliable testing 🔸 Serilog – Structured logging that’s actually useful in production 🔸 ErrorOr – Clear success and error handling instead of nulls 🔸 Quartz – Scheduling background jobs and recurring tasks This setup has been solid so far and easy to reason about as the project grows. 💬 What libraries are you currently using in your .NET projects? Comment below 👇 🧠 Subscribe to my free newsletter – .𝙉𝙀𝙏 𝙒𝙚𝙚𝙠𝙡𝙮 𝙏𝙞𝙥𝙨 𝙗𝙮 𝙋𝙤𝙤𝙧𝙣𝙖. Get simple, practical tips on .NET, ASP.NET Core, EF Core, AI and more every week.👇 👉 https://lnkd.in/gZebJJMi ♻️ If you found this helpful, consider reposting to help others in the community. 👉 Follow me, Poorna Soysa, and hit the 🔔 on my profile so you don’t miss upcoming .NET tips and deep dives.
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Rasika Hemantha liked thisRasika Hemantha liked this𝗗𝗧𝗢 𝘃𝘀 𝗘𝗻𝘁𝗶𝘁𝘆 𝗶𝗻 .𝗡𝗘𝗧 — 𝗪𝗵𝘆 𝗜𝘁 𝗠𝗮𝘁𝘁𝗲𝗿𝘀 A common question in .NET architecture: Should you expose your Entity directly, or use a DTO (Data Transfer Object)? Here’s the bottom line: 𝗘𝗻𝘁𝗶𝘁𝘆 → Represents your database model. Great for persistence, but risky to expose externally. 𝗗𝗧𝗢 → A lightweight object for API requests/responses. Enhances security, performance, and decoupling. 𝗪𝗵𝘆 𝗗𝗧𝗢𝘀 𝗺𝗮𝘁𝘁𝗲𝗿: - Keep sensitive fields hidden (e.g., PasswordHash) - Transfer only the data you need - Use tailored DTOs for different endpoints - Prevent breaking changes when DB schema evolves - Apply validation rules easily 𝗥𝘂𝗹𝗲 𝗼𝗳 𝗧𝗵𝘂𝗺𝗯: • Entities stay inside the data layer • DTOs travel across API and client layers Question for fellow developers: Do you always use DTOs in your .NET projects, or do you sometimes expose Entities directly? 𝗪𝗮𝗻𝘁 𝗺𝗼𝗿𝗲 𝗖# & 𝗔𝗦𝗣.𝗡𝗘𝗧 𝗖𝗼𝗿𝗲 𝘁𝗶𝗽𝘀 𝗹𝗶𝗸𝗲 𝘁𝗵𝗶𝘀? 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝘁𝗼 𝗺𝘆 𝗻𝗲𝘄𝘀𝗹𝗲𝘁𝘁𝗲𝗿: https://lnkd.in/d7vqHFbN ➕ Follow me(Kanaiya Katarmal) for .NET & software architecture insights, and hit the 🔔 on my profile so you don’t miss upcoming .NET tips and deep dives. #dotnet #csharp #softwarearchitecture #entityframework #dto hashtag #cleanarchitecture #apis #backenddevelopment #programming
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Rasika Hemantha liked thisRasika Hemantha liked this𝗦𝗰𝗮𝗹𝗶𝗻𝗴 𝘁𝗼 𝟭,𝟬𝟬𝟬,𝟬𝟬𝟬 𝗨𝘀𝗲𝗿𝘀: 𝗔 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗮𝗹 𝗣𝗼𝘀𝘁𝗴𝗿𝗲𝗦𝗤𝗟 𝗔𝗽𝗽𝗿𝗼𝗮𝗰𝗵 I once worked on a system that grew from zero to over a million users. It started as a monolith: one app server, one database. That was fine for a while. But as traffic grew, performance dropped. The database became the bottleneck. We didn't jump straight to microservices or complex orchestration. We took a practical, step-by-step approach to evolve our database architecture. Here is the journey depicted in the graphic below: 1️⃣ Initial Launch: Started with a single, robust PostgreSQL primary instance. Simple and cost-effective. 2️⃣ Distribute Reads: When read traffic increased, we added Read Replicas behind a load balancer. The primary handled writes; replicas handled reads. 3️⃣ Optimize Connections: As concurrency spiked, we were exhausting database connections. We introduced pgBouncer for efficient connection pooling. 4️⃣ Caching at Scale: To hit 1M+ users, we needed to stop hitting the DB for everything. We added Redis to cache frequently accessed data. The main lesson: Solve the problem you have right now. Don't build architecture for 5 years from now if you don't have customers today. Overengineering before there is real demand is a trap. Your application supports a business. If the business isn’t working, scaling won’t fix it. 👉 Learn more about scaling applications here: https://lnkd.in/dyP-rghS What’s the biggest bottleneck you’ve faced when scaling an app? --- Do you want to simplify your development process? Grab my Clean Architecture template here and save 7 days of development time: https://lnkd.in/dYNsNb52
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Rasika Hemantha liked thisRasika Hemantha liked thisFive Years. One Pandemic. One Bootstrapped Journey. We started Snippet Digital in the wake of Covid, and what a ride it’s been. Over the past 5+ years, we built Keyword Insights, one of the most recognized SEO tools in the industry, and with a small, scrappy team, we bootstrapped our way to a seven figure business. This week, Andy Chadwick flew out to Dubai to plan the next phase of both our agency and SaaS. Big things ahead. A massive thank you to everyone who’s been part of the journey, every customer who subscribed, every agency client who trusted us, and every person who liked, shared, or gave us feedback. We wouldn’t be here without you.
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Rasika Hemantha liked this✨ From global event stages to NZ classrooms ✨ Over the past 12 years, I’ve had the privilege of delivering events across six continents – from major exhibitions in Dubai to international conferences in Oman, to high-value expos in Singapore, and community activations here in New Zealand. What I’ve learned is that every event is really about people – creating spaces for connection, learning, and growth. That same drive to connect and inspire has guided me in my recent teaching role at AUT. Shifting from the buzz of global events to the energy of a classroom has been a fascinating journey – one that’s reminded me how much impact we can have when we invest in people directly. The pivot hasn’t always been smooth, but it’s been rewarding. Adapting, listening, and finding ways to add value in new environments has reinforced one of my biggest lessons: skills are transferable when you lead with curiosity and purpose. Have you ever made a career pivot that surprised you with how transferable your skills turned out to be? #CareerPivot #EventManagement #Education #Leadership #LifelongLearning
Experience & Education
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Woolworths Group
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Licenses & Certifications
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Lean Six Sigma Green Belt Certification
ASQ Human Development and Leadership Division
IssuedCredential ID TH12810 -
Microsoft Certified Technology Specialist .NET Framework 3.5 ASP.NET Applications
Microsoft
IssuedCredential ID SR1859838 -
Microsoft Certified Technology Specialist .NET Framework 2.0 Web Applications
Microsoft
IssuedCredential ID SR1859838
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English
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