https://www.samuelfaj.com/en/ Software development insights, tutorials, and best practices by Samuel Fajreldines. en-US Sun, 28 Jun 2026 11:30:00 -0300 samuel@samuelfaj.com (Samuel Fajreldines) samuel@samuelfaj.com (Samuel Fajreldines) 60 https://www.samuelfaj.com/en/blog/the-bottleneck-for-code-agents-is-review/ https://www.samuelfaj.com/en/blog/the-bottleneck-for-code-agents-is-review/ Sun, 28 Jun 2026 11:30:00 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Artificial Intelligence https://www.samuelfaj.com/en/blog/serving-typescript-definitions-for-eden-treaty-a-production-ready-approach/ https://www.samuelfaj.com/en/blog/serving-typescript-definitions-for-eden-treaty-a-production-ready-approach/ Tue, 06 Jan 2026 21:00:00 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Backend Development https://www.samuelfaj.com/en/blog/claudiomiro-how-to-achieve-100-autonomous-complex-coding/ https://www.samuelfaj.com/en/blog/claudiomiro-how-to-achieve-100-autonomous-complex-coding/ Sun, 05 Oct 2025 21:00:00 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Artificial Intelligence https://www.samuelfaj.com/en/blog/creating-a-native-knowledge-graph-system-with-mongodb-s3-and-langchain/ https://www.samuelfaj.com/en/blog/creating-a-native-knowledge-graph-system-with-mongodb-s3-and-langchain/ Wed, 30 Jul 2025 00:52:49 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Artificial Intelligence https://www.samuelfaj.com/en/blog/internationalizing-react-apps-and-backend-services-best-practices-for-i18n/ https://www.samuelfaj.com/en/blog/internationalizing-react-apps-and-backend-services-best-practices-for-i18n/ Mon, 21 Jul 2025 00:52:49 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Frontend Development https://www.samuelfaj.com/en/blog/building-a-fitness-ai-agent-with-langchainjs-a-real-world-implementation/ https://www.samuelfaj.com/en/blog/building-a-fitness-ai-agent-with-langchainjs-a-real-world-implementation/ Sat, 19 Jul 2025 09:00:00 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Artificial Intelligence https://www.samuelfaj.com/en/blog/mastering-langchainjs-to-coordinate-tool-and-function-calls-using-ai-agents/ https://www.samuelfaj.com/en/blog/mastering-langchainjs-to-coordinate-tool-and-function-calls-using-ai-agents/ Thu, 17 Jul 2025 22:34:33 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Artificial Intelligence https://www.samuelfaj.com/en/blog/long-term-memory-for-ai-how-graphiti-works-for-building-real-smart-applications/ https://www.samuelfaj.com/en/blog/long-term-memory-for-ai-how-graphiti-works-for-building-real-smart-applications/ Mon, 14 Jul 2025 19:27:18 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Artificial Intelligence https://www.samuelfaj.com/en/blog/building-an-ai-assisted-linkedin-job-application-bot-with-puppeteer-bun-chatgpt/ https://www.samuelfaj.com/en/blog/building-an-ai-assisted-linkedin-job-application-bot-with-puppeteer-bun-chatgpt/ Fri, 04 Jul 2025 15:45:00 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Automation https://www.samuelfaj.com/en/blog/how-to-organize-services-in-an-msc-architecture-with-typescript-for-scalability-and-clarity/ https://www.samuelfaj.com/en/blog/how-to-organize-services-in-an-msc-architecture-with-typescript-for-scalability-and-clarity/ Sat, 26 Apr 2025 11:24:29 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Software Architecture https://www.samuelfaj.com/en/blog/all-the-types-of-tests-in-software-development/ https://www.samuelfaj.com/en/blog/all-the-types-of-tests-in-software-development/ Tue, 25 Feb 2025 01:04:44 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Testing https://www.samuelfaj.com/en/blog/mastering-transactions-in-modern-software-engineering/ https://www.samuelfaj.com/en/blog/mastering-transactions-in-modern-software-engineering/ Tue, 11 Feb 2025 14:15:52 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Software Architecture https://www.samuelfaj.com/en/blog/what-are-end-to-end-tests-and-how-to-implement-them-with-playwright/ https://www.samuelfaj.com/en/blog/what-are-end-to-end-tests-and-how-to-implement-them-with-playwright/ Mon, 10 Feb 2025 14:48:37 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Testing https://www.samuelfaj.com/en/blog/elevate-your-testing-strategy-with-typegoose-and-mongodb-memory-server/ https://www.samuelfaj.com/en/blog/elevate-your-testing-strategy-with-typegoose-and-mongodb-memory-server/ Fri, 07 Feb 2025 15:01:15 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Testing https://www.samuelfaj.com/en/blog/mastering-typescript-decorators-how-to-use-and-how-to-create/ https://www.samuelfaj.com/en/blog/mastering-typescript-decorators-how-to-use-and-how-to-create/ Wed, 05 Feb 2025 11:11:03 -0300 samuel@samuelfaj.com (Samuel Fajreldines) TypeScript https://www.samuelfaj.com/en/blog/building-a-linkedin-job-application-robot-with-puppeteer-and-typescript/ https://www.samuelfaj.com/en/blog/building-a-linkedin-job-application-robot-with-puppeteer-and-typescript/ Fri, 31 Jan 2025 11:30:45 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Automation https://www.samuelfaj.com/en/blog/why-you-should-always-specify-version-numbers-in-docker-and-package-managers/ https://www.samuelfaj.com/en/blog/why-you-should-always-specify-version-numbers-in-docker-and-package-managers/ Wed, 29 Jan 2025 11:53:51 -0300 samuel@samuelfaj.com (Samuel Fajreldines) DevOps & Cloud https://www.samuelfaj.com/en/blog/a-complete-guide-to-redux-what-it-is-how-to-use-it-and-a-full-example/ https://www.samuelfaj.com/en/blog/a-complete-guide-to-redux-what-it-is-how-to-use-it-and-a-full-example/ Wed, 29 Jan 2025 09:57:32 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Frontend Development https://www.samuelfaj.com/en/blog/how-to-split-react-components-for-easy-unit-testing/ https://www.samuelfaj.com/en/blog/how-to-split-react-components-for-easy-unit-testing/ Mon, 27 Jan 2025 17:49:14 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Frontend Development https://www.samuelfaj.com/en/blog/mastering-multi-cloud-with-terraform-deploying-infrastructure-on-google-cloud-and-aws/ https://www.samuelfaj.com/en/blog/mastering-multi-cloud-with-terraform-deploying-infrastructure-on-google-cloud-and-aws/ Fri, 24 Jan 2025 11:58:00 -0300 samuel@samuelfaj.com (Samuel Fajreldines) DevOps & Cloud https://www.samuelfaj.com/en/blog/why-i-hired-chatgpt-pro-200month-as-my-junior-developer/ https://www.samuelfaj.com/en/blog/why-i-hired-chatgpt-pro-200month-as-my-junior-developer/ Wed, 22 Jan 2025 10:20:10 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Artificial Intelligence https://www.samuelfaj.com/en/blog/implementing-event-driven-architecture-with-aws-and-nodejs/ https://www.samuelfaj.com/en/blog/implementing-event-driven-architecture-with-aws-and-nodejs/ Mon, 20 Jan 2025 16:37:57 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Software Architecture https://www.samuelfaj.com/en/blog/backend-system-architecture-why-the-model-controller-service-pattern-reigns-supreme/ https://www.samuelfaj.com/en/blog/backend-system-architecture-why-the-model-controller-service-pattern-reigns-supreme/ Mon, 20 Jan 2025 13:38:28 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Software Architecture https://www.samuelfaj.com/en/blog/gitlab-ci-for-nodejs-a-guide-to-continuous-integration/ https://www.samuelfaj.com/en/blog/gitlab-ci-for-nodejs-a-guide-to-continuous-integration/ Fri, 17 Jan 2025 13:08:17 -0300 samuel@samuelfaj.com (Samuel Fajreldines) DevOps & Cloud https://www.samuelfaj.com/en/blog/serverless-data-processing-pipelines-with-google-cloud-run/ https://www.samuelfaj.com/en/blog/serverless-data-processing-pipelines-with-google-cloud-run/ Fri, 17 Jan 2025 09:04:21 -0300 samuel@samuelfaj.com (Samuel Fajreldines) DevOps & Cloud https://www.samuelfaj.com/en/blog/mastering-web-testing-with-playwright-why-its-essential-and-how-to-get-started/ https://www.samuelfaj.com/en/blog/mastering-web-testing-with-playwright-why-its-essential-and-how-to-get-started/ Thu, 16 Jan 2025 23:43:57 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Testing https://www.samuelfaj.com/en/blog/scaling-nodejs-applications-best-practices-for-2025/ https://www.samuelfaj.com/en/blog/scaling-nodejs-applications-best-practices-for-2025/ Mon, 13 Jan 2025 09:04:12 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Backend Development https://www.samuelfaj.com/en/blog/implementing-cicd-pipelines-with-docker-and-aws/ https://www.samuelfaj.com/en/blog/implementing-cicd-pipelines-with-docker-and-aws/ Fri, 10 Jan 2025 09:04:36 -0300 samuel@samuelfaj.com (Samuel Fajreldines) DevOps & Cloud https://www.samuelfaj.com/en/blog/building-scalable-graphql-apis-with-nodejs-in-2025/ https://www.samuelfaj.com/en/blog/building-scalable-graphql-apis-with-nodejs-in-2025/ Thu, 09 Jan 2025 17:03:38 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Backend Development https://www.samuelfaj.com/en/blog/building-resilient-microservices-with-aws-and-docker/ https://www.samuelfaj.com/en/blog/building-resilient-microservices-with-aws-and-docker/ Thu, 09 Jan 2025 16:58:03 -0300 samuel@samuelfaj.com (Samuel Fajreldines) DevOps & Cloud https://www.samuelfaj.com/en/blog/the-future-of-serverless-trends-to-watch-in-2025/ https://www.samuelfaj.com/en/blog/the-future-of-serverless-trends-to-watch-in-2025/ Thu, 09 Jan 2025 16:25:22 -0300 samuel@samuelfaj.com (Samuel Fajreldines) DevOps & Cloud https://www.samuelfaj.com/en/blog/the-ultimate-guide-to-cypress-introduction-implementation-and-example-project/ https://www.samuelfaj.com/en/blog/the-ultimate-guide-to-cypress-introduction-implementation-and-example-project/ Wed, 13 Nov 2024 01:08:10 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Testing https://www.samuelfaj.com/en/blog/understanding-health-checks-what-they-are-how-to-use-them-and-the-best-tools-in-google-cloud-and-aws/ https://www.samuelfaj.com/en/blog/understanding-health-checks-what-they-are-how-to-use-them-and-the-best-tools-in-google-cloud-and-aws/ Mon, 11 Nov 2024 00:25:28 -0300 samuel@samuelfaj.com (Samuel Fajreldines) DevOps & Cloud https://www.samuelfaj.com/en/blog/optimizing-data-transfer-costs-with-multiple-containers-in-google-cloud-run/ https://www.samuelfaj.com/en/blog/optimizing-data-transfer-costs-with-multiple-containers-in-google-cloud-run/ Wed, 06 Nov 2024 15:08:49 -0300 samuel@samuelfaj.com (Samuel Fajreldines) DevOps & Cloud https://www.samuelfaj.com/en/blog/mastering-jest-a-complete-guide-to-testing-react-applications/ https://www.samuelfaj.com/en/blog/mastering-jest-a-complete-guide-to-testing-react-applications/ Sun, 03 Nov 2024 22:35:37 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Testing https://www.samuelfaj.com/en/blog/implementing-jwt-authentication-in-typescript-a-comprehensive-guide/ https://www.samuelfaj.com/en/blog/implementing-jwt-authentication-in-typescript-a-comprehensive-guide/ Thu, 31 Oct 2024 14:33:10 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Backend Development https://www.samuelfaj.com/en/blog/mastering-redux-a-comprehensive-guide-to-state-management-in-react/ https://www.samuelfaj.com/en/blog/mastering-redux-a-comprehensive-guide-to-state-management-in-react/ Mon, 28 Oct 2024 19:22:01 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Frontend Development https://www.samuelfaj.com/en/blog/mastering-socketio-everything-you-need-to-know-with-a-complete-example/ https://www.samuelfaj.com/en/blog/mastering-socketio-everything-you-need-to-know-with-a-complete-example/ Thu, 24 Oct 2024 23:20:49 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Backend Development https://www.samuelfaj.com/en/blog/a-complete-guide-to-styled-components/ https://www.samuelfaj.com/en/blog/a-complete-guide-to-styled-components/ Wed, 23 Oct 2024 17:32:14 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Frontend Development https://www.samuelfaj.com/en/blog/the-ultimate-guide-to-using-react-query-why-and-how-to-implement-it/ https://www.samuelfaj.com/en/blog/the-ultimate-guide-to-using-react-query-why-and-how-to-implement-it/ Tue, 22 Oct 2024 18:24:35 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Frontend Development https://www.samuelfaj.com/en/blog/understanding-typescript-utility-types-partial-omit-and-more/ https://www.samuelfaj.com/en/blog/understanding-typescript-utility-types-partial-omit-and-more/ Sun, 20 Oct 2024 23:03:09 -0300 samuel@samuelfaj.com (Samuel Fajreldines) TypeScript https://www.samuelfaj.com/en/blog/using-generic-classes-in-typescript-a-guide-for-backend-development/ https://www.samuelfaj.com/en/blog/using-generic-classes-in-typescript-a-guide-for-backend-development/ Sat, 19 Oct 2024 22:44:30 -0300 samuel@samuelfaj.com (Samuel Fajreldines) TypeScript https://www.samuelfaj.com/en/blog/getting-started-with-google-cloud-run-a-comprehensive-guide/ https://www.samuelfaj.com/en/blog/getting-started-with-google-cloud-run-a-comprehensive-guide/ Thu, 17 Oct 2024 23:15:42 -0300 samuel@samuelfaj.com (Samuel Fajreldines) DevOps & Cloud https://www.samuelfaj.com/en/blog/how-to-effectively-use-controllers-models-services-and-more/ https://www.samuelfaj.com/en/blog/how-to-effectively-use-controllers-models-services-and-more/ Sun, 13 Oct 2024 21:00:00 -0300 samuel@samuelfaj.com (Samuel Fajreldines) Software Architecture https://www.samuelfaj.com/en/blog/understanding-typescript-abstract-classes-a-comprehensive-guide/ https://www.samuelfaj.com/en/blog/understanding-typescript-abstract-classes-a-comprehensive-guide/ Sat, 12 Oct 2024 21:00:00 -0300 samuel@samuelfaj.com (Samuel Fajreldines) TypeScript https://www.samuelfaj.com/en/blog/harnessing-the-power-of-serverless-architecture-with-nodejs-on-aws/ https://www.samuelfaj.com/en/blog/harnessing-the-power-of-serverless-architecture-with-nodejs-on-aws/ Thu, 10 Oct 2024 21:00:00 -0300 samuel@samuelfaj.com (Samuel Fajreldines) DevOps & Cloud