Software engineer building web systems end to end, with a working interest in application security. Selected projects, writing, and how to get in touch.https://jashezan.com/enjashezan@gmail.com (Jubyer Ahmed Shezan)https://jashezan.hashnode.dev/anatomy-of-a-self-hosted-temporal-stackhttps://jashezan.hashnode.dev/anatomy-of-a-self-hosted-temporal-stackWhy Temporal is becoming the substrate of choice for background jobs, and what it actually takes to run the stack yourself instead of paying for the cloud offering.Tue, 12 May 2026 00:00:00 GMTbackendinfrastructurehttps://jashezan.hashnode.dev/permanent-fix-for-nodejsbun-too-many-open-files-error-on-linux-development-the-linux-solutionhttps://jashezan.hashnode.dev/permanent-fix-for-nodejsbun-too-many-open-files-error-on-linux-development-the-linux-solutionThe cryptic 'Too many open files (os error 24)' crash that hits modern JS dev servers on Linux, and the permanent OS-level fix instead of a per-project workaround.Sat, 25 Oct 2025 00:00:00 GMTlinuxnode.jstoolinghttps://jashezan.hashnode.dev/transform-your-ollama-docker-terminal-a-parrot-os-makeoverhttps://jashezan.hashnode.dev/transform-your-ollama-docker-terminal-a-parrot-os-makeoverCustomizing the plain default shell inside an Ollama Docker container into something informative and Parrot-OS-styled.Thu, 21 Aug 2025 00:00:00 GMTdockershellaihttps://jashezan.hashnode.dev/mastering-sqlmodel-the-ultimate-beginners-guide-to-sql-in-pythonhttps://jashezan.hashnode.dev/mastering-sqlmodel-the-ultimate-beginners-guide-to-sql-in-pythonSQLModel's middle path between raw SQL and a heavyweight ORM, and how to get productive with it in Python quickly.Wed, 11 Jun 2025 00:00:00 GMTpythondatabasehttps://jashezan.hashnode.dev/how-to-set-up-passwordless-ssh-for-secure-access-to-your-vpshttps://jashezan.hashnode.dev/how-to-set-up-passwordless-ssh-for-secure-access-to-your-vpsSwapping repeated VPS password prompts for SSH key auth — safer and faster once it's set up right.Tue, 03 Jun 2025 00:00:00 GMTlinuxsecuritydevopshttps://jashezan.hashnode.dev/how-to-push-to-multiple-remote-git-repositories-with-a-single-commandhttps://jashezan.hashnode.dev/how-to-push-to-multiple-remote-git-repositories-with-a-single-commandKeeping a primary GitHub repo and a GitLab mirror in sync with one push, instead of running the command twice.Thu, 29 May 2025 00:00:00 GMTgittoolinghttps://jashezan.hashnode.dev/how-to-manage-local-databases-in-dockerized-omnidb-postgresql-and-mysql-basicshttps://jashezan.hashnode.dev/how-to-manage-local-databases-in-dockerized-omnidb-postgresql-and-mysql-basicsRunning OmniDB in Docker to manage PostgreSQL and MySQL databases living on the host, on a fresh Kubuntu/Ubuntu setup.Thu, 08 May 2025 00:00:00 GMTdockerdatabasehttps://jashezan.hashnode.dev/boost-your-go-development-workflow-with-this-vscode-extensionhttps://jashezan.hashnode.dev/boost-your-go-development-workflow-with-this-vscode-extensionEnding the habit of Googling struct tag syntax across gorm, validator, json, and friends — introducing the GoTagMate extension.Thu, 01 May 2025 00:00:00 GMTgolangtoolinghttps://jashezan.hashnode.dev/write-cleaner-expressjs-code-the-ultimate-guide-to-absolute-imports-with-typescripthttps://jashezan.hashnode.dev/write-cleaner-expressjs-code-the-ultimate-guide-to-absolute-imports-with-typescriptTrading the confusing relative-path imports of a growing Express/TypeScript project for clean absolute paths.Mon, 31 Mar 2025 00:00:00 GMTtypescriptnode.jsbackendhttps://jashezan.hashnode.dev/how-to-fix-persistent-dns-reset-issue-in-kubuntu-2404https://jashezan.hashnode.dev/how-to-fix-persistent-dns-reset-issue-in-kubuntu-2404Chasing down DNS settings that keep resetting after every reboot on Kubuntu 24.04, and the fix that actually sticks.Fri, 28 Mar 2025 00:00:00 GMTlinuxnetworkinghttps://jashezan.com/projects/projectomshttps://jashezan.com/projects/projectomsOrder management platform with a full backend and merchant-facing dashboard for tracking orders through fulfilment.Wed, 01 Jan 2025 00:00:00 GMTbackendfull-stackhttps://jashezan.com/projects/gotagmatehttps://jashezan.com/projects/gotagmatePublished VS Code extension giving autocompletion and inline docs for Go struct tags across json, gorm, validate, and other popular libraries.Wed, 01 Jan 2025 00:00:00 GMTtoolingdeveloper-experiencehttps://jashezan.hashnode.dev/installing-zen-browser-on-linux-download-setup-and-create-a-desktop-entryhttps://jashezan.hashnode.dev/installing-zen-browser-on-linux-download-setup-and-create-a-desktop-entryGetting the minimalist, privacy-focused Zen Browser installed and properly integrated into a Linux desktop.Sat, 26 Oct 2024 00:00:00 GMTlinuxtoolinghttps://jashezan.hashnode.dev/boost-your-nextjs-productivity-a-comprehensive-guide-to-setting-up-nextjs-with-eslint-prettier-husky-and-lint-stagedhttps://jashezan.hashnode.dev/boost-your-nextjs-productivity-a-comprehensive-guide-to-setting-up-nextjs-with-eslint-prettier-husky-and-lint-stagedA full walkthrough of wiring ESLint, Prettier, Husky, and lint-staged into a fresh Next.js project.Tue, 08 Oct 2024 00:00:00 GMTnext.jstoolinghttps://jashezan.hashnode.dev/configure-eslint-prettier-husky-lint-staged-properly-for-nextjshttps://jashezan.hashnode.dev/configure-eslint-prettier-husky-lint-staged-properly-for-nextjsCleaning up ESLint and Prettier configuration for a TypeScript Next.js project so the setup actually holds together.Mon, 07 Oct 2024 00:00:00 GMTnext.jstoolinghttps://jashezan.hashnode.dev/step-by-step-guide-to-configuring-husky-and-lint-staged-with-eslint-and-prettierhttps://jashezan.hashnode.dev/step-by-step-guide-to-configuring-husky-and-lint-staged-with-eslint-and-prettierWiring Husky and lint-staged to run ESLint and Prettier automatically before every Git commit.Mon, 30 Sep 2024 00:00:00 GMTgittoolinghttps://jashezan.hashnode.dev/mastering-postgresql-user-and-role-management-a-step-by-step-guidehttps://jashezan.hashnode.dev/mastering-postgresql-user-and-role-management-a-step-by-step-guideChecking service status, understanding default credentials, and getting PostgreSQL user and role management right.Sat, 22 Jun 2024 00:00:00 GMTdatabasepostgresqlhttps://jashezan.hashnode.dev/how-to-delete-a-directory-from-your-git-repositorys-historyhttps://jashezan.hashnode.dev/how-to-delete-a-directory-from-your-git-repositorys-historyRemoving an entire directory from a Git repo's history to keep it clean, not just from the working tree.Tue, 30 Apr 2024 00:00:00 GMTgithttps://jashezan.hashnode.dev/how-to-move-a-git-repository-into-a-sub-folder-of-another-repositoryhttps://jashezan.hashnode.dev/how-to-move-a-git-repository-into-a-sub-folder-of-another-repositoryUsing Git subtrees to fold one repository into another as a subdirectory, history and all.Mon, 15 Apr 2024 00:00:00 GMTgithttps://jashezan.hashnode.dev/publish-react-app-from-create-react-app-to-githubhttps://jashezan.hashnode.dev/publish-react-app-from-create-react-app-to-githubThe exact commands to take a create-react-app project from local to a published GitHub Pages deploy.Sat, 13 Apr 2024 00:00:00 GMTreacttoolinghttps://jashezan.hashnode.dev/the-react-js-nextjs-project-structure-i-followhttps://jashezan.hashnode.dev/the-react-js-nextjs-project-structure-i-followThe folder structure settled on for React and Next.js projects, and the articles that shaped it.Mon, 08 Apr 2024 00:00:00 GMTreactnext.jshttps://jashezan.com/projects/prostutihttps://jashezan.com/projects/prostutiLive MCQ exam platform with a data-entry tool for question authoring and an admin panel for exam and user management.Mon, 01 Jan 2024 00:00:00 GMTbackendfull-stackhttps://jashezan.hashnode.dev/api-101-understanding-the-basicshttps://jashezan.hashnode.dev/api-101-understanding-the-basicsWhat an API actually is and why it matters, for anyone new to software development.Sun, 02 Apr 2023 00:00:00 GMTapifundamentalshttps://jashezan.hashnode.dev/find-and-prevent-host-header-injection-with-these-resourceshttps://jashezan.hashnode.dev/find-and-prevent-host-header-injection-with-these-resourcesA wrong move with the HTTP Host header can put your application and its users at risk. What the attack looks like, how to test for it, and how to shut it down.Wed, 15 Feb 2023 00:00:00 GMTsecuritywebhttps://jashezan.hashnode.dev/automate-youtube-video-publishing-with-javascripthttps://jashezan.hashnode.dev/automate-youtube-video-publishing-with-javascriptPublishing uploads one by one gets old fast. A script that drives the process for you, and the pieces of the YouTube API it leans on.Fri, 20 Jan 2023 00:00:00 GMTautomationjavascripthttps://jashezan.com/projects/node-js-course-storehttps://jashezan.com/projects/node-js-course-storeA server-rendered course marketplace built on Node and Express, with authentication, a catalogue, and a checkout flow.Sun, 01 Jan 2023 00:00:00 GMTbackendfull-stackhttps://jashezan.com/projects/cosmo-junkiehttps://jashezan.com/projects/cosmo-junkieA space-themed React application built around a public astronomy API, with client-side routing and responsive layouts.Sun, 01 Jan 2023 00:00:00 GMTfrontendapihttps://jashezan.com/projects/terra-whaleshttps://jashezan.com/projects/terra-whalesPlatform connecting product entrepreneurs with investors, powered by RESTful APIs and an admin panel for listings and user access.Sun, 01 Jan 2023 00:00:00 GMTbackendhttps://jashezan.hashnode.dev/show-time-and-date-in-the-terminalhttps://jashezan.hashnode.dev/show-time-and-date-in-the-terminalPutting the clock on the right-hand side of your ZSH prompt, and the oh-my-zsh configuration that makes it stick.Sat, 10 Dec 2022 00:00:00 GMTshelltoolinghttps://jashezan.com/projects/shez-booking-frontendhttps://jashezan.com/projects/shez-booking-frontendThe front end for a hotel booking product: search, filtering by date and occupancy, and a reservation flow.Sat, 01 Jan 2022 00:00:00 GMTfrontendproducthttps://jashezan.com/projects/foodies-websitehttps://jashezan.com/projects/foodies-websiteA restaurant site with a menu, responsive layout, and a focus on getting the typography and spacing right without a framework.Sat, 01 Jan 2022 00:00:00 GMTfrontendhttps://jashezan.com/projects/react-todo-apphttps://jashezan.com/projects/react-todo-appA task manager with persistent local state, covering the full create/edit/complete/delete cycle.Sat, 01 Jan 2022 00:00:00 GMTfrontendhttps://jashezan.com/projects/social-media-crud-apphttps://jashezan.com/projects/social-media-crud-appA small social feed exercising the full create, read, update, and delete cycle against a REST API.Sat, 01 Jan 2022 00:00:00 GMTfrontendapihttps://jashezan.com/projects/comments-removerhttps://jashezan.com/projects/comments-removerA browser tool that strips comments from source in several languages — a small utility built to scratch a real itch.Sat, 01 Jan 2022 00:00:00 GMTtoolinghttps://jashezan.com/projects/line-serializerhttps://jashezan.com/projects/line-serializerA text utility for numbering, prefixing, and reshaping lists of lines in bulk.Sat, 01 Jan 2022 00:00:00 GMTtoolinghttps://jashezan.com/projects/breaking-bad-casthttps://jashezan.com/projects/breaking-bad-castA character browser built on a public API, with live search and a responsive card grid.Sat, 01 Jan 2022 00:00:00 GMTfrontendapihttps://jashezan.com/projects/web-projects-sitehttps://jashezan.com/projects/web-projects-siteA directory site indexing the smaller experiments, built so each one had a stable home.Sat, 01 Jan 2022 00:00:00 GMTfrontendhttps://jashezan.com/projects/html-css-portfoliohttps://jashezan.com/projects/html-css-portfolioThe first portfolio, hand-written in HTML and CSS before any framework. Kept as a marker of where things started.Fri, 01 Jan 2021 00:00:00 GMTfrontend