FR
Portrait of Hammayoun Safi

Full-Stack Developer · France · Remote / hybrid

Hammayoun Safi

I build complete products, from the database to the App Store.

Rails APIs, Vue and React web apps, Expo mobile apps on the App Store and Google Play, and the infrastructure under them. At work I build a multi-module HR and learning SaaS. On my own I built and launched Hatiwal, a local marketplace for Afghanistan in English, Pashto and Dari.

Selected workDownload CVhmmshl@gmail.com
Now
Full-Stack Developer at Seven
Built and run
Hatiwal and MultiMagic
Developer since
2020

Principle

“I don’t build halfway. I start, and I finish.”

When I take on a product, I take all of it: the API, the web app, the mobile app, the tests, the deploy and the store release. Done means it works for real people, in their language, on their phone.

  • End-to-end ownership

    Database to API, web, mobile, infrastructure and store release, and I keep maintaining it afterwards.

  • Tests are part of done

    RSpec, Jest, Vitest, Playwright and Maestro. CI must pass before anything deploys.

  • Built for every language

    English, Pashto, Dari, French, Arabic and Urdu, with real right-to-left layouts, native digits and calendars.

  • Owns the hard dependencies

    When a hosted map provider broke my app, I self-hosted the map.

01Selected work

Products I built and run

Three products I designed and built alone (two live, one on staging), the employer work I contribute to every day, and what I’m building next.

Live · iOS, Android, Web

Hatiwal

Local marketplace for Afghanistan

Hatiwal home page: "Buy and sell locally in Afghanistan" with a search bar and product categories

Solo founder-developer · live since September 2026

Buy and sell near you, chat in the app, meet in person. No online payment and no delivery: it is built for how people actually trade locally, in English, Pashto and Dari with full right-to-left layouts.

Tested end to end before every release: Jest, Maestro flows on real devices, Playwright on the web.

Stack

  • Rails 8.1
  • PostgreSQL 16
  • Expo / React Native
  • Next.js 15
  • MapLibre
  • PMTiles
  • Kamal 2

What I built

  • Three apps on one Rails 8.1 API: an Expo / React Native app for iOS and Android, a separate Next.js 15 web app at feature parity, and an admin back office
  • Listings with holds and offers, reviews and seller trust, real-time chat, verified accounts and push notifications
  • A self-hosted vector map of Afghanistan (map.hatiwal.com): PMTiles, MapLibre and nginx, 16 light and dark styles in four languages, no third-party API key
  • Kamal 2 deploys on a VPS, nightly backups with restore tests, store releases with EAS
Live · Web

MultiMagic

All-in-one personal workspace

MultiMagic home page: "All your apps, one place"

Designed, built and run alone · since July 2024

One place for notes, pages, money, calendar, tasks, contacts, documents and passwords, with an AI assistant over your own data and an MCP server so Claude can work with it.

Covered by RSpec, Capybara and RSwag suites. Nothing deploys unless CI is green.

Stack

  • Rails 8.1
  • PostgreSQL + pgvector
  • React 19
  • TypeScript
  • Tiptap 3
  • Yjs
  • Kamal 2

What I built

  • Tables: an Airtable-style database with grid, kanban and calendar views, relations and a filter builder compiled to SQL
  • Collaborative notes and pages (Tiptap + Yjs), finance with budgets and multiple currencies, calendar with Google sync
  • SafeZone: an encrypted vault for passwords, cards and IDs, with a Chrome / Edge autofill extension
  • AI assistant with RAG over the user’s data, local multilingual embeddings and bring-your-own-key
  • An MCP server exposing 51 tools from one action layer, with OAuth and API keys
Staging · Web, mobile in progress

Madares

School-management system, web and mobile

role workspaces
6role workspaces
languages, RTL included
6languages, RTL included
one Rails API
Web + mobileone Rails API
Playwright + axe-core
WCAG AAPlaywright + axe-core

Sole developer · since August 2025

A multi-tenant platform that runs a whole school, with one workspace per role: admin, accountant, teacher, student, guardian and staff. A React web app and an Expo mobile app on one Rails API.

English, French, Arabic, Pashto and Urdu on the web, Dari on mobile, with right-to-left layouts. Built to WCAG AA and checked with Playwright + axe-core; RSpec and Maestro.

Stack

  • Rails 8.1
  • Sidekiq
  • Pundit
  • React 19
  • TypeScript
  • Radix
  • TanStack Query
  • Expo

What I built

  • Admissions, classes and sections, subjects and timetables; attendance with six statuses
  • Exams with marks or grades and scheduled result release, class ranking and PDF report cards
  • A full fees module: plans, invoices, payments, late fees, concessions and reports
  • A book catalog, a form builder with public forms, student mentoring and a guardian portal
  • A reusable index component for tables and cards with filters, search, pagination and bulk actions
  • Expo mobile app (React Native Reusables, NativeWind) in progress

At Seven

Employer products, described at a high level.

In production

OpenAleph

HR and talent-management SaaS

A multi-module B2B platform for interviews, 360 feedback, surveys, OKRs, skills reviews, e-learning, work time and workforce planning, with an embedded AI assistant.

  • The Learn module: e-learning, quizzes, an AI evaluation workflow and AI-generated audio summaries
  • Interview, 360-feedback, skills-review, survey, OKR, work-time and workforce-planning apps
  • The AI layer: a reusable AI task framework and an in-app assistant with real-time chat

Stack

  • Rails 8
  • Vue 3
  • TypeScript
  • PostgreSQL
  • Sidekiq
  • Expo
Internal

Studio

Internal training-production back office

Designs and staffs training programmes: trainings, workshops, rich-text modules, trainer assignment and invoicing, programme PDFs.

  • Data model, permissions, the module editor, trainer management and billing
  • An MCP server with OAuth so an AI assistant can operate the tool safely
  • Production deployment with Kamal

Stack

  • Rails 7
  • Vue 3
  • Vuetify
  • MCP
  • Kamal
In production

SVN UI Library

OpenAleph’s Vue 3 design system

The component library and design tokens behind OpenAleph, published as an open-source Vue 3 library.

  • Tables, filters and autocomplete
  • Editor blocks, avatar and conversation components
  • Library builds

Stack

  • Vue 3
  • Vuetify 3
  • TypeScript
  • Tailwind 4
  • Tiptap 3
  • Storybook

In progress

In development

Karwan

Delivery and rides platform for Kabul

Merchant deliveries and passenger trips served by one courier pool: one app with customer, merchant and courier modes, plus an ops console.

  • Courier shifts, wallets and settlements; pricing rules; OTP verification
  • Right-to-left first, with the Shamsi calendar and Persian numerals
  • Routing on my own self-hosted map

A fully tested Rails API (RSpec).

Stack

  • Rails 8.1
  • Solid Queue
  • Expo 54
  • MapLibre

Smaller projects

02Experience

Where I’ve worked

  1. Apr 2023 – Present

    Full-Stack Developer · Seven

    France

    • One of the main contributors to OpenAleph, a multi-module HR and talent-management SaaS.
    • Built the Learn module and the interview, 360-feedback, skills-review, survey, OKR, work-time and workforce-planning apps.
    • Built the platform’s AI layer: a reusable AI task framework, an in-app assistant with real-time chat and a KPI agent.
    • Built an MCP server with OAuth for the internal training back office, and set up its production deployment with Kamal.
    • Co-developed the shared Vue 3 design system. Contributed to the Flutter mobile app and its Expo successor.
    • Built a Node.js / Express + Puppeteer PDF-rendering service.

  2. Dec 2020 – Mar 2023

    Junior Developer · Blackbird (Jam)

    France

    • Built a multi-bot data-reporting system and a content-authoring tool.
    • Referral-message APIs in Rails and Express.js, with Vue interfaces.
    • Moderation and back-office interfaces.

Before development, 2013 – 2020

Volunteer interpreter (Association Le Scarabée, France). Tour-boat guide (Älvkungen, Sweden). Sales for an artisanal honey producer (Afghanistan / Pakistan).

03Stack

What I use

Only what my repositories actually use. The daily core comes first.

Backend
Ruby on Rails 7 / 8 · PostgreSQL · Sidekiq · Pundit · Node.js / Express.js · ActionCable · pgvector · Redis · Solid Queue · Devise / OAuth · RSwag / OpenAPI
Frontend
Vue 3 · React 19 · Next.js 15 · Tailwind CSS 4 · TanStack Query · Pinia · Vuetify 3 · Nuxt 3 · Radix / shadcn · Tiptap 3 + Yjs · MapLibre GL · Storybook
Mobile
Expo / React Native · Flutter / Dart · App Store and Google Play releases · expo-router · NativeWind · Reanimated · EAS · Codemagic · GetX
Maps
Self-hosted vector tiles (PMTiles) · MapLibre · MapLibre React Native · Apple Maps · Leaflet · nginx + TLS
AI
MCP servers · RAG · OpenAI · Gemini · DeepSeek · LangChain.rb · Local ONNX embeddings · AI coding agents (Claude Code)
Infra
Docker · Kamal 2 · GitHub Actions · GitLab CI · VPS · nginx · Backups with restore tests · Runbooks · Linux
Quality
RSpec · Playwright · Maestro · Vitest · Jest · React Native Testing Library · axe-core · RuboCop · Brakeman
Languages
Ruby · TypeScript · JavaScript · SQL · Bash · Dart

04About

About

I like doing things properly, start to finish. I own features end to end, from the data model to the screen people tap, and I don’t call them done until they’re tested, deployed and in users’ hands.

That is how Hatiwal went from an idea to the App Store and Google Play in English, Pashto and Dari, and how I work on a production SaaS every day. I build AI into products (RAG assistants, MCP servers) and work with AI coding agents under clear specs and strict test gates.

Languages

  • Pashto · native
  • Dari / Persian
  • Urdu / Hindi
  • English
  • French

Training

  • Konexio Digistart: web development + DELF B12019 – 2020 · France
  • Technical college: web development2015 – 2019 · Sweden
  • Abasyn Web Development Institute2012 – 2015 · Pakistan

05Contact

Have something to build? Let’s finish it.

Open to remote or hybrid roles from France. Email is the fastest way to reach me.

Email meDownload CV