I'm a full-stack engineer working across the JavaScript and Python ecosystems — React, Next.js and TypeScript on the front end, Node.js or FastAPI on the back end, whichever the problem calls for. I care most about the parts that are easy to get wrong: authentication (OAuth 2.0 and JWT), data modelling across PostgreSQL, MongoDB and MySQL through ORMs like Prisma and Drizzle, and the messy glue of third-party integrations. I've shipped products used by tens of thousands of people, and lately I've been building AI-powered tools end to end. I started out in C and Java, grew into the web stack, and I'm picking up Rust and Go on the side. Mostly I just like turning fuzzy problems into clean, practical software that ships.
Md. Latiful Kabir
Software Engineer
MD · LATIFUL · KABIR
I build software
that ships.
Full-stack engineer across the JavaScript & Python ecosystems — React, Next.js, Node and FastAPI. I build products that actually ship: auth systems, AI tooling, and a fleet of live apps & public APIs.
apps deployed
live on vercel
public apis
openapi · no-key
users reached
affpilot · global
current post
gen-ai engineer
Terminal
type a command · it's realOperator Profile
dossier- based in
- Dhaka, Bangladesh
- focus
- Full-stack Auth AI tooling
- languages
- Bangla Native speaker English Intermediate
- interests
- Open Source Development Cloud Architecture Emerging Technologies
Deployment History
career logFlagship Systems
selected buildsDoetra — AI SEO Article Generator
Full-stack AI SaaS, built end-to-end as a solo developer, that generates SEO-optimized product review and informational articles with auto-generated images and one-click WordPress publishing. Live app at app.doetra.com with a Next.js marketing site at doetra.com.
Suite of 24 free
Suite of 24 free in-browser tools on doetra.com (image upscaler, OCR with Bangla, auto subtitles, PDF editor, background remover, job-form photo resizer and more), each at a search-keyword path with its own pre-rendered pages, structured data and sitemap, routed through a Cloudflare Worker with edge caching in front of Vercel.
Five article generation flows
product Roundup reviews, Info (educational) articles, Outline-to-Article, plus bulk Roundup and bulk Info batch jobs with queue-based async processing and live status tracking.
AI text and image
AI text and image generation through swappable model providers, so models can be upgraded without code changes: featured images and up to 3 inline section images per article.
Live Amazon Creators API
Live Amazon Creators API integration across 31 search indexes with in-stock filtering and per-site Amazon affiliate tag management.
A free, privacy-first video editor that runs entirely in the browser — no upload, no watermark, no signup. 29 tools (trim, compress to any size, resize for Reels/TikTok, text, music, blur, GIF, split and more) stack into one edit list and export in a single pass. Live at doetra.com/online-video-editor, part of the Doetra suite of free tools.
A live sky-visualization web app that consumes my own Horizon (Sun & Moon) and Orrery (planetary) APIs to show exactly what's above you at this moment — read back in plain language, with a full English ⇄ Bengali interface.
A calm live wallpaper for Windows written in Rust: today's prayer times from my Miqaat API, the next prayer, and one authentic reminder at a time with its source, drawn behind the desktop icons on a photo of a great mosque. One 14 MB self-installing exe, about 30 MB of memory.
A web application for reading the Quran, with features like advanced search, multiple translations, audio recitations, and customizable themes.
A modern, fully responsive web application for exploring authentic Islamic Hadiths in Arabic, English, and Urdu.
A comprehensive web application providing accurate Islamic prayer times, fasting schedules, Qibla direction, and Hijri calendar conversion for Muslims worldwide.
A fast, free, browser-based graphic-design studio (a mini-Canva) built with React 18 and Fabric.js — no login, no download. Make social posts, thumbnails, slides, flyers and logos, then export up to 5K. Live at canvo-dev.vercel.app.
Browser-based design tool for creating customizable Islamic greeting cards, inspired by Figma and Canva.
Backend APIs
10 services · online10 free, public, no-key REST APIs — documented with OpenAPI, deployed on Vercel.
The Fleet
51 apps · auto-synced51 apps deployed on Vercel — this grid rebuilds itself from my account, so new launches appear on their own.
Image to SVG — trace PNG/JPG logos, sketches and art into clean vector paths in your browser.
UtilitiesBijoy ↔ Unicode for text and whole Word, Excel and PowerPoint files (English kept), and any Bangla PDF — broken, Bijoy or scanned — to a correct Word file.
UtilitiesPhoto watermarker — text or logo watermarks, placed or tiled, on up to 50 photos at once with zip download.
UtilitiesHEIC converter — turn iPhone photos into JPG, PNG or WebP in your browser, many at once.
UtilitiesFavicon generator — from an image, text or emoji to a full pack: multi-size ICO, PNGs, app icons and the HTML snippet.
Design & makersHandwriting → font — draw your letters or snap a photo of paper, and download a real, installable .ttf.
Design & makersDevice mockups — drop a screenshot into iPhone, MacBook, Android or browser frames and export a clean mockup.
Design & makersMeme maker — classic captions, GIF memes, multi-panel layouts and deep-fry effects; full-res export, no watermark.
Design & makersCode-screenshot maker — paste code, pick from 66 themes and export a sharp PNG or JPG for posts and docs.
Design & makersPhoto → coloring book — turn photos into clean line art or color-by-number sheets and export a printable PDF book.
Design & makersData converter — JSON, CSV and YAML in any direction, plus TypeScript types and Zod schemas, all in-browser.
UtilitiesPost & chat screenshot maker — tweet, LinkedIn-style post and chat mockups, exported as crisp images.
Design & makersImage compressor — AVIF/WebP/JPEG/PNG, compress to an exact size like 100 KB, 200 images at once with folders kept.
UtilitiesSticker-pack maker — cut out photos in-browser, add captions and motion, and export ready WhatsApp/Telegram packs.
Design & makersJob-form photo & signature resizer — face-centred 300×300 photo and a clean 300×80 signature under the KB limit, with every rule checked.
UtilitiesAI image upscaler — enlarge photos 2× or 4× with in-browser AI, full resolution, no watermark, nothing uploaded.
AI toolsImage to text (OCR) — reads Bangla and English together from photos and PDFs; export Word, searchable PDF or text.
AI toolsAuto subtitle generator — in-browser AI captions with word-by-word styles, then export an MP4 with them burned in or an SRT.
AI toolsPDF editor — edit existing text, fill forms, sign, merge, compress and convert PDFs entirely in your browser.
UtilitiesQR code generator — URL, WiFi, WhatsApp and vCard codes with colors, dot styles and a logo; bulk export, PNG/SVG/PDF.
Design & makersObject eraser — tap anything in a photo and in-browser AI removes it, at full resolution, with undo for every step.
AI toolsOld photo restorer — in-browser AI finds and repairs scratches and sharpens faces in old photos, nothing uploaded.
AI toolsBackground remover — in-browser AI cuts out people and products at full resolution; transparent PNG, no upload.
AI tools3D photo effect — in-browser AI reads the depth in a still photo and brings it to life as a moving 3D scene.
AI toolsProphets' Stories — read the stories of the prophets in a clean, distraction-free app.
IslamicPrayer Times — a client-side Islamic prayer & fasting schedule (the app the Miqaat API was derived from).
IslamicPrayer & fasting timetable studio — turn the Miqaat API into shareable daily cards, monthly tables and full-year posters in English, Bengali & Arabic; export PNG or PDF.
IslamicBrowser design studio — a free, no-login Canva-style editor: 100 ready-made templates, 211 shapes, millions of free stock photos, 300+ icons and 49 fonts on an infinite canvas, with smart guides, align & distribute and export up to 5K.
Design & makersYour sky, right now — a live radar that tracks the Sun by day and the phase-accurate Moon by night, reads the sky back in plain language, and toggles between the geocentric sky and a heliocentric orrery. Consumes my Horizon + Orrery APIs; fully English & বাংলা.
SkyColor-palette studio — pull palettes from a photo, build harmonies, check WCAG contrast, export CSS/Tailwind/SCSS/JSON/SVG/PNG.
Design & makersCrossword maker — type clue/answer pairs and it interlocks them into a real numbered crossword with a printable puzzle + answer key.
Design & makersWord-search puzzle maker — turn a word list into a grid (reverse & diagonal placement) and a printable PDF with answer key.
Design & makersFlashcards & quizzes — build decks, study with 3D flip cards, and test yourself with auto-generated multiple-choice quizzes.
Design & makersWord-cloud maker — paste text for a weighted cloud with 24 fonts, custom palettes, multiple shapes and PNG export.
Design & makersSocial / OG image generator — turn a title into a polished 1200×630 share card with templates, gradients and fonts.
Design & makersInvoice generator — build a clean, branded invoice with live A4 preview and real PDF export across 20 currencies.
UtilitiesTier-list maker — drag image and text tiles into S/A/B/C tiers and export the board as an image.
Design & makersQuote-card maker — turn text into a shareable social card; 6 formats, 24 fonts, gradient or photo backgrounds.
Design & makersDuplicate-photo finder — cluster near-identical photos with in-browser AI, keep the best, export a delete list.
AI toolsSemantic file search — upload files and search across them by meaning with ranked passages. In-browser embeddings.
AI toolsDocument Q&A — paste text, ask a question, get the exact answer span highlighted in the source. In-browser AI.
AI toolsText summarizer — paste an article and get a short/medium/long summary, all in-browser, nothing uploaded.
AI toolsSentiment analyzer — paste reviews for POSITIVE/NEGATIVE breakdowns and a summary, running entirely in your browser.
AI toolsFace & plate blur — auto-detect and blur faces (or draw your own regions); pixelate/blur/solid with undo-redo.
UtilitiesMetadata stripper — remove EXIF/location data from images losslessly, in batches with zip.
UtilitiesText-to-speech — natural multilingual voices in-browser (Piper); play with sentence highlighting and export WAV/MP3.
AI toolsBackground remover — erase image backgrounds in one click with in-browser AI; export a clean transparent PNG.
AI toolsIslamic card designer — create and export Eid & Islamic greeting cards in the browser.
IslamicAl-Quran reader — browse and read the Holy Quran in a clean, fast client-side app.
IslamicHadith Explorer — browse and search hadith collections in a quick client-side reader.
IslamicLive Ops
real-time · client-side- Miqaat Prayer times & fasting ····
- Horizon Sun & Moon ····
- Orrery Ephemeris / astronomy ····
- Astraea Astrology / natal charts ····
- Rave Human Design ····
- Vitals Clinical calculators ····
- Verdant Carbon footprint ····
- Tessera Geospatial geometry ····
- Declino Geomagnetic field ····
- Swelter Thermal comfort ····
location
locating…
hijri
—
qibla
—
next prayer
— --:--:--
—
Fajr
··:··
Sunrise
··:··
Dhuhr
··:··
Asr
··:··
Maghrib
··:··
Isha
··:··
Sehri ends
··:··
Iftar
··:··
Fetching your local schedule…
qibla — · — km to Makkah
Source Activity
@Saimon8420Systems / Stack
56 technologiesExpert
9 technologies
- JavaScript
- TypeScript
- React.js
- Next.js
- HTML5
- CSS3
- Tailwind CSS
- Git
- GitHub
Advanced
18 technologies
- Python
- Shadcn UI
- Magic UI
- Astro
- Redux Toolkit
- React Query
- Zustand
- Context API
- Node.js
- Express.js
- FastAPI
- PostgreSQL
- MongoDB
- Prisma
- JWT
- OAuth 2.0
- Vercel
- Postman
Proficient
22 technologies
- Angular
- Vue.js
- Material UI
- Chakra UI
- DaisyUI
- MySQL
- Supabase
- Drizzle ORM
- Mongoose
- ClerkAuth
- Docker
- GitHub Actions
- Railway
- Render
- Firebase
- Jest
- React Testing Library
- Figma
- Notion
- VS Code
- Trello
- Slack
Familiar
7 technologies
- Java
- C
- Rust
- Go
- Bun.js
- Elysia.js
- Passport.js
Credentials
education2016 — 2021
Daffodil International University
B.Sc. in Computer Science and Engineering (CSE)
Computer Science and Engineering
HSC2013 — 2015
BAF Shaheen College, Tejgaon
Higher Secondary Certificate (Science)
Science
SSC2011 — 2013
Jan-E-Alam Sarker High School
Secondary School Certificate (Science)
Science