WPSubscription
Subscriptions and recurring payments for WooCommerce, published on WordPress.org. Billing cycles, free trials, installment plans and a customer self-service area, renewed in the background through Stripe, PayPal and further gateways.
Seven years building the parts of the web other people ship on.
Custom WordPress plugins and themes, third-party integrations, and full-stack products in React, Node.js and PHP. Code I maintain runs on more than two million sites.
- 2M+
- sites running a plugin I help build
- 7
- years shipping WordPress and full-stack products
- 5
- WordPress Core releases with my contributions in them
- 13+
- projects translated into Bengali as a Polyglots editor
Work
Everything here is live, and everything here is mine to point at.
Essential Addons for Elementor
The most-installed Elementor addon. I work across the widget library, performance, security hardening and backward compatibility for a codebase non-technical site builders depend on daily.
Tablentor
A table builder for Elementor, published on WordPress.org. Custom widget, live editor controls, responsive output and import/export — built to plugin review standards and maintained through Core updates.
Restrict Elementor Widgets
Per-role access control for the Elementor editor, published on WordPress.org. An administrator decides which widgets, columns and sections each role may use, and the editor stops offering the rest.
Strata
A database admin client you host yourself. Browse data, run SQL and manage schema from a React app over a thin PHP and PDO JSON API. Credentials never leave the browser, and it ships as a zip — no Node, no Composer.
Muhtamim
An ERP for madrasas, in Bengali and English. Admissions, attendance, exams and results, fees and expenses, and hifz progress, in one tenant-isolated workspace with a role for the administrator, the teacher, the parent and the student.
The workspace itself is behind sign-in; the public site is the marketing page.
What I actually do
Seven years of it, in two halves that keep feeding each other.
I am a WordPress and full-stack engineer based in Dhaka, Bangladesh, working remote and async-first. Half the work is WordPress at scale; the other half is product engineering outside it. What follows is the honest version of both.
WordPress at scale
Custom plugins and themes, Elementor widgets, WooCommerce extensions, third-party API integrations, and the unglamorous maintenance that keeps all of it working after Core and Elementor both move underneath it.
Products end to end
React, Node.js, TypeScript, PHP, Laravel and MySQL. On product work I build the data model, the API and the interface rather than one layer of the three, which is also where the interesting decisions live.
Compatibility as the specification
Essential Addons for Elementor is installed on more than two million sites. At that size a widget that renders differently after an update breaks pages published years ago, so the questions come in a fixed order: what depends on this, what happens to those sites if it changes, and can it change without asking anyone to migrate.
Security as a default, not a pass
A plugin on two million sites is a shared attack surface. Every input reaching PHP is hostile until sanitised and every output dangerous until escaped. Contributions credited in five WordPress Core releases came out of working this way, as did editing Bengali translations for the Polyglots, Core and Photos teams.
Agents that do real work
Autonomous AI workflows built on the Claude Agent SDK and LLM function calling, aimed at the work around a product rather than a demo: triaging support questions, reproducing reported issues, opening GitHub issues, drafting candidate pull requests, and writing release changelogs and newsletters.
The work I like best
The kind of problem that needs one person to own it end to end — the data model through to the interface, including the decisions in between about what the system should refuse to do.
Common questions
- What does Jakaria Istauk build?
- Custom WordPress plugins and themes, Elementor widgets, WooCommerce extensions and third-party integrations, plus full-stack products in React, Node.js, TypeScript, PHP, Laravel and MySQL, and autonomous AI agents built on the Claude Agent SDK. On product work he builds the data model, the REST API and the interface rather than a single layer.
- How much experience does he have?
- Seven years, since 2019. Currently a software engineer at ThemeXpert, leading development of the WPSubscription plugin. Before that he spent four years on Essential Addons for Elementor, which runs on more than two million sites, after earlier full-stack roles at Codexpert and Agemark Technology.
- Has he contributed to WordPress Core?
- Yes. His contributions are credited in five WordPress Core releases — 6.1, 6.2, 6.3, 6.4 and 6.9 — and he is a Bengali translation editor for the WordPress Polyglots, Core and Photos teams.
- How can I get in touch with him?
- He works remote and async-first from Dhaka, Bangladesh. The fastest route is email; his CV is downloadable from any page of this site.
- What is his strongest technical area?
- Maintaining WordPress code at scale: shipping features into a plugin installed on millions of sites without breaking the pages already built on it, which means backward compatibility, performance and security hardening in equal measure.
Experience
Where the seven years went.
Sep 2026 — Present
Software Engineer
ThemeXpert
Leads core architecture and feature development for WPSubscription, a WordPress.org subscription plugin: subscription management, recurring billing lifecycles and payment gateway integrations. Also built Doel, an autonomous AI agent for the product that works across Telegram and Discord to answer client queries, validate reported issues, open GitHub issues, draft candidate pull requests, and write the release changelogs and newsletters.
Mar 2022 — Jul 2026
WordPress Developer
WPDeveloper, Inc
Features, performance and security work on Essential Addons for Elementor, holding backward compatibility across a plugin installed on more than two million sites. Also built internal Node.js and TypeScript products: a book management platform, and FigWP, a service that converts Figma designs into Elementor templates, including the sales, user-credit and import systems and AI-assisted widget generation.
Aug 2019 — Feb 2022
Jr. Software Engineer
Codexpert, Inc
Sole engineer on several full-stack PHP, WordPress and JavaScript products — a WooCommerce builder for Elementor, a WooCommerce affiliate marketing plugin, per-role widget access control for the editor, and a 2Checkout payment gateway integration.
Feb 2019 — Jul 2019
Jr. Software Architect
Agemark Technology Ltd.
Application architecture, data models and backend services.
Shipped in WordPress itself
Core contributions credited in five releases. Also a Bengali translation editor for the Polyglots, Core and Photos teams.
In the community
- Table LeadWordCamp Rajshahi 2026
- Table LeadWordCamp Kolkata 2022
- SpeakerElementor Bangladesh Meetup
Education
- MSc, Computer ScienceDaffodil International University · 2021
- BSc, Computer ScienceDaffodil International University · 2018
Get in touch
Open to senior WordPress and full-stack roles.
And to the kind of problem that needs someone to own it end to end.