The personal website of a tech startup CTO. Explore real-world insights on scalable software engineering, AI/ML, cybersecurity, and tech leadership.https://techwithramesh.com/en-ushttps://techwithramesh.com/blog/9-advanced-rag-techniques-explained/https://techwithramesh.com/blog/9-advanced-rag-techniques-explained/Here's a straightforward overview of 9 advanced RAG retrieval techniques, including hybrid search, HyDE, query routing, and others, each designed to solve specific challenges. It's a friendly guide to help you understand how each method works and what problems they address.Tue, 04 Aug 2026 00:00:00 GMTai-mlragllmRamesh Rathnayakehttps://techwithramesh.com/blog/kimi-k3-moonshot-ai/https://techwithramesh.com/blog/kimi-k3-moonshot-ai/Moonshot AI's Kimi K3 is an impressive 2.8-trillion-parameter open-weight model that's making waves in AI pricing, benchmarks, and the ongoing China-US competition. Here's a look at what's new!Sun, 19 Jul 2026 00:00:00 GMTai-mlllmopen-weight-modelsRamesh Rathnayakehttps://techwithramesh.com/blog/axios-supply-chain-attack-2026/https://techwithramesh.com/blog/axios-supply-chain-attack-2026/Exploring the axios npm supply chain attack reveals a concerning story: a fake startup founder, a hijacked maintainer account, malware hidden in a popular JavaScript library, and a challenging 3-hour cleanup. It highlights the importance of vigilance in the open-source community.Mon, 25 May 2026 00:00:00 GMTsecuritysupply-chainRamesh Rathnayakehttps://techwithramesh.com/blog/a-practical-guide-to-securing-logins-and-access-in-web-apps-and-apis/https://techwithramesh.com/blog/a-practical-guide-to-securing-logins-and-access-in-web-apps-and-apis/Here's a helpful guide to essential authentication and authorization practices for your web apps and APIs, covering passwordless login, multi-factor authentication, password hashing, RBAC, and ABAC. These tips are designed to keep your applications secure and user-friendly.Fri, 03 Nov 2023 00:00:00 GMTsecurityauthintroductionRamesh Rathnayakehttps://techwithramesh.com/blog/oauth-2-0-essentials/https://techwithramesh.com/blog/oauth-2-0-essentials/OAuth 2.0 is a common authorization framework that lets you grant applications limited access to your online accounts without sharing your passwords. Learn the roles, grant types, and steps.Sat, 02 Sep 2023 00:00:00 GMTsecurityauthintroductionRamesh Rathnayakehttps://techwithramesh.com/blog/amazon-prime-video-s-monolith-pivot/https://techwithramesh.com/blog/amazon-prime-video-s-monolith-pivot/Amazon Prime Video didn’t prove microservices are broken. This case study explains why a video quality service moved to a monolith, cutting costs by 90%+, and what it teaches about choosing architecture based on workload, scale, and operational complexity.Sun, 07 May 2023 00:00:00 GMTengineeringmicroservicesRamesh Rathnayakehttps://techwithramesh.com/blog/strategy-design-pattern/https://techwithramesh.com/blog/strategy-design-pattern/The Strategy design pattern helps you create a group of algorithms and switch between them while your program runs. This makes your code cleaner and easier to manage by cutting down on complexity and repeated code.Thu, 29 Dec 2022 00:00:00 GMTengineeringdesign-patternsRamesh Rathnayakehttps://techwithramesh.com/blog/working-effectively/https://techwithramesh.com/blog/working-effectively/Working remotely requires a different set of skills and habits than working in an office. Here are some tips on how to work effectively in a remote environment.Thu, 22 Dec 2022 00:00:00 GMTproductivitywork-habitsRamesh Rathnayakehttps://techwithramesh.com/blog/understand-erc-1155/https://techwithramesh.com/blog/understand-erc-1155/ERC-1155 is a smart contract standard for token management on Ethereum. It combines the features of ERC-20 and ERC-721 to support multiple token types and reduce gas fees.Tue, 20 Dec 2022 00:00:00 GMTengineeringblockchainRamesh Rathnayakehttps://techwithramesh.com/blog/ambassador-design-pattern-in-microservices/https://techwithramesh.com/blog/ambassador-design-pattern-in-microservices/Learn how the Ambassador design pattern improves microservices with centralized routing, service discovery, sharding support, and safe request splitting for experiments.Sun, 18 Dec 2022 00:00:00 GMTengineeringmicroservicesdesign-patternsRamesh Rathnayakehttps://techwithramesh.com/blog/microservices-with-the-chassis-pattern/https://techwithramesh.com/blog/microservices-with-the-chassis-pattern/Explore the power of the Microservice Chassis pattern in building scalable, secure, and reliable microservices. Learn key functionalities, best practices, and real-world use cases.Sun, 11 Dec 2022 00:00:00 GMTengineeringmicroservicesdesign-patternsRamesh Rathnayakehttps://techwithramesh.com/blog/disagree-respectfully/https://techwithramesh.com/blog/disagree-respectfully/Sometimes you may encounter an argument you disagree with. In this article, I'll show you how to disagree respectfully and constructively, using some simple steps and tips.Mon, 28 Nov 2022 00:00:00 GMTproductivitycommunicationRamesh Rathnayakehttps://techwithramesh.com/blog/add-eslint-with-npm/https://techwithramesh.com/blog/add-eslint-with-npm/Learn how to configure ESLint with the modern flat config setup, add lint scripts, and use Husky plus lint-staged to prevent commits with lint errors in JavaScript or TypeScript projects.Wed, 30 Dec 2020 00:00:00 GMTproductivitylinttypescriptRamesh Rathnayakehttps://techwithramesh.com/blog/custom-token-authentication-with-firebase/https://techwithramesh.com/blog/custom-token-authentication-with-firebase/Sometimes you need to authenticate your app with a third-party authentication server while still using the features Firebase provides. Here is how to create and use a custom token to do exactly that.Wed, 16 Dec 2020 00:00:00 GMTsecurityfirebaseauthRamesh Rathnayakehttps://techwithramesh.com/blog/secure-firebase-cloud-functions-with-firebase-auth/https://techwithramesh.com/blog/secure-firebase-cloud-functions-with-firebase-auth/Learn how to secure Firebase HTTPS Cloud Functions using Firebase Authentication. Validate Bearer ID tokens with Express middleware and the Admin SDK to allow only authenticated users.Sat, 12 Dec 2020 00:00:00 GMTsecurityfirebaseauthRamesh Rathnayakehttps://techwithramesh.com/blog/firebase-navigate-on-notification-click/https://techwithramesh.com/blog/firebase-navigate-on-notification-click/Firebase Cloud Messaging (FCM) can send notifications to a single or multiple devices. Here is how to open the relevant screen in your app when a user clicks the notification.Tue, 30 Jun 2020 00:00:00 GMTengineeringfirebasemobileflutterRamesh Rathnayakehttps://techwithramesh.com/blog/how-to-use-future-builders-effectively/https://techwithramesh.com/blog/how-to-use-future-builders-effectively/It's not common to use Futures directly in a Flutter view, but using them incorrectly can seriously hurt your app's performance. Here's the most effective way to use Future values in your app.Mon, 29 Jun 2020 00:00:00 GMTengineeringfirebasemobileflutterRamesh Rathnayakehttps://techwithramesh.com/blog/cloud-functions-basics-in-typescript/https://techwithramesh.com/blog/cloud-functions-basics-in-typescript/Learn how to structure Firebase Cloud Functions with TypeScript using clean architecture. Build scalable handlers, services, DAOs, and mappers for maintainable serverless backends.Mon, 04 May 2020 00:00:00 GMTengineeringfirebasetypescriptdesign-patternsRamesh Rathnayakehttps://techwithramesh.com/blog/introduction-to-sum-tree/https://techwithramesh.com/blog/introduction-to-sum-tree/Sum Trees are a data structure for sampling data by priority, commonly used in reinforcement learning to prioritize experiences that are most valuable for a model to learn from.Mon, 18 Mar 2019 00:00:00 GMTai-mlintroductionpythonRamesh Rathnayakehttps://techwithramesh.com/blog/google-hacking-database/https://techwithramesh.com/blog/google-hacking-database/Learn how to use Google dorks and the Google Hacking Database to find vulnerabilities on your own web servers before attackers do. All you need is a browser.Thu, 07 Feb 2019 00:00:00 GMTsecurityosintRamesh Rathnayakehttps://techwithramesh.com/blog/introduction-to-neural-networks/https://techwithramesh.com/blog/introduction-to-neural-networks/Machine Learning is a very interesting and popular topic. This second article in the introduction to machine learning series covers the basic concepts of Artificial Neural Networks.Sun, 23 Dec 2018 00:00:00 GMTai-mlneural-networkintroductionRamesh Rathnayakehttps://techwithramesh.com/blog/introduction-to-machine-learning/https://techwithramesh.com/blog/introduction-to-machine-learning/Machine learning is an exciting and fast-growing field. This article is the first in a series that introduces the basics and some useful tips.Thu, 13 Dec 2018 00:00:00 GMTai-mlintroductionRamesh Rathnayakehttps://techwithramesh.com/blog/vim-cheat-sheet/https://techwithramesh.com/blog/vim-cheat-sheet/Vim is a powerful text editor, but it can be tricky to learn at first. This cheat sheet lists the Vim commands that intermediate users use most often.Sat, 08 Dec 2018 00:00:00 GMTproductivitycliRamesh Rathnayakehttps://techwithramesh.com/blog/python-coding-best-practices/https://techwithramesh.com/blog/python-coding-best-practices/A practical style guide for writing clean, consistent Python code. These are the conventions used by the Machine Learning Team at FCode Labs.Mon, 03 Dec 2018 00:00:00 GMTengineeringpythonlintRamesh Rathnayake