Mustafa Enes Kalkan

Computer Engineering Student | Frontend Engineer

Frontend Intern at Jotform, Aug 3 – Sep 11, 2026. I build product UI and in-product tools—including a visual review system that pins live UI in iframes and re-resolves those pins after DOM churn. I also ship full-stack web apps and production DevOps infrastructure.

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Experience

Frontend Intern

Jotform

Aug 3 – Sep 11, 2026

Built Review Element Selector, an internal visual review app that loads live product surfaces in an iframe so reviewers can select elements, draw regions, and leave notes. Selections are stored as fingerprints, not CSS paths, so they survive reloads, virtualization, and duplicate DOM ids.

  • Click-select, area annotations, notes, undo/redo, and PNG capture over live product iframes
  • Fingerprint scoring with a semantic gate so positional CSS is never enough to rematch an element
  • Generic capture/overlay core with product adapters for virtualized grids and kanban boards
  • Nested same-origin iframe hit-testing and session persistence in IndexedDB

Featured Projects

Visual review & durable UI pinning over live iframes

Jotform · Internal prototype

Review Element Selector

At Jotform I built an internal review app that loads live product surfaces (forms, tables, boards, sign, workflows, and more) in an iframe so reviewers can select elements, draw regions, and leave notes. Selections are stored as fingerprints, not CSS paths, so they survive reloads, virtualization, and duplicate DOM ids. Product-specific adapters plug into a generic scorer. Reviews can be captured as annotated PNGs and kept locally. This is an internal lab / review prototype, not a public product.

Secure, production-ready Node.js API foundation

Production Backend Template

A robust backend template focusing on absolute security, strict token management, and session auditing—designed as a reusable foundation for commercial web applications.

View on GitHub
Production-ready CMS frontend integrated with the backend framework

CMS Starter Template

A Content Management System frontend seamlessly integrated with the production backend template, with same-origin proxying and multi-layer admin authorization.

View on GitHub
Image upload and on-the-fly manipulation API

Imagero

A specialized microservice serving as an independent image hosting and on-the-fly manipulation engine with filesystem caching for repeat requests.

View on GitHub
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Tech Stack & Skills

JavaScript & TypeScript

Python, Java, C/C++, SQL

React & Next.js

Node.js / Express

FastAPI & .NET

PostgreSQL, MongoDB, MSSQL

IndexedDB

Docker & Docker Compose

Nginx / Traefik

AWS & Cloudflare

Linux & Bash

Arduino & ESP32

Ready to build something amazing?

I'm focused on frontend engineering after my Jotform internship—durable product UI, visual tooling, and full-stack delivery. Available for freelance projects, consultation, and collaboration.

Contact Me