Available for select engineering work

Currently working as

I take products from an empty schema to the pixel a customer taps — ledger-first backends, bilingual ERP platforms, Flutter apps and real-time dashboards that hold up under real load.

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Résumé
Omar Al-Qadhi
Location
Riyadh, Saudi Arabia
Shipping since
2023
Current focus
Backend architecture & DDD
  • TypeScript
  • NestJS
  • Next.js
  • Flutter
  • Python
  • ERPNext
  • PostgreSQL
  • Redis
  • Docker
  • Prisma
  • Frappe
  • Firebase

11

Documented case studies

6

Systems live in production

35

Technologies in the toolbox

64

Interface screens documented

Every figure below is counted directly from the case studies on this site — nothing rounded up.

01Selected work

Real platforms with real users — architecture decisions, trade-offs and results, written up as case studies.

02What I build

Different surfaces, same discipline: model the domain first, make the data auditable, and leave the codebase better documented than I found it.

01 /
append-only ledgerverified
TX-1042+ 1,240.001,240.00
TX-1043− 310.50929.50
TX-1044+ 86.001,015.50
TX-1045− 140.00875.50

Backend systems

Ledger-first financial cores, modular-monolith architecture, and REST APIs designed to stay correct under real load.

02 /
HMAC ✓

Mobile apps

Production Flutter apps for delivery, customer and offline-first use cases — real-time, HMAC-secured, and battle-tested.

03 /
HRCRMStockGLPOSBI

ERP & operations

Custom Frappe/ERPNext apps and deployments that fold manufacturing, HR, CRM and accounting into one bilingual system.

04 /

Web dashboards

Real-time Next.js dashboards for admins, merchants and customers, sharing a common design system.

03How I work

01

Model the domain before the database

Boundaries first, tables second. Every module I ship has explicit domain, application and infrastructure layers so business rules never leak into a controller.

02

Make the numbers auditable

Balances are derived from append-only ledgers, never stored as mutable counters. If a figure is wrong, there's always a trail that explains why.

03

Isolate what you don't control

Payment gateways, ERP bridges and messaging APIs sit behind an anti-corruption layer. A third party going down degrades a feature, not the platform.

04

Ship it documented

READMEs, install guides and API references are part of the deliverable. Code that only I can run isn't finished.

04Toolbox

Grouped by where they sit in a system. Explore the full breakdown with experience levels and the projects each one shipped in.

  • Python
  • TypeScript
  • Dart
  • SQL
  • JavaScript
  • C#
  • PHP
  • Frappe Framework
  • ERPNext
  • NestJS
  • REST API design
  • Node.js
  • Laravel
  • Flutter
  • Firebase
  • GetX
  • Provider
  • Next.js
  • React
  • Tailwind CSS
  • RTL / Bilingual UI
  • UI / UX design
  • PostgreSQL
  • Prisma
  • MariaDB / MySQL
  • Redis
  • Firestore
  • Linux / Ubuntu
  • Git / GitHub
  • Docker
  • nginx
  • Clean Architecture / DDD
  • Event-driven & queues
  • Multi-tenant systems
  • WebSockets / realtime

05Experience

Roles where I owned architecture and delivery, not just tickets.

2026

Full-Stack Software Engineer

Carry Go — Warehouse & Logistics System

Boulevard City, Riyadh

Frappe / ERPNextPythonFlutterMariaDBRedisLinux

Key contributions

  • Designed and built a complete custom Frappe app (carry_go) covering hooks, fixtures, setup data, role-based permissions, and scheduled background tasks.
  • Developed a bilingual (Arabic/English) Warehouse Portal for supervisors and staff, handling order management, attendance, payroll, and accounting from a single interface.
  • Built an embedded accounting module rendering P&L, General Ledger, detailed invoices, and KPI cards — integrated directly with ERPNext so users never leave the portal.
Read the case study

2026

Full-Stack Engineer

Spare Parts Marketplace Platform — Multi-tenant B2C

NestJSTypeScriptPostgreSQLPrismaNext.jsReactRedis / BullMQWebSocketsFlutter

Key contributions

  • Architected and built a modular-monolith backend (NestJS, Clean Architecture/DDD, PostgreSQL/Prisma) with strict domain boundaries and an anti-corruption layer isolating all optional third-party integrations (payments, ERP, WhatsApp).
  • Designed a ledger-first financial system: append-only wallet and inventory ledgers as the single source of truth, a rule-based commission engine, an auditable multi-state withdrawal workflow, and automated invoice generation with QR pickup verification.
  • Built a full order lifecycle state machine (merchant confirmation → payment → fulfillment → pickup) with automated timeout handling, dispute resolution, and partial/full refunds with credit-note generation.
Read the case study

06What people say

Omar delivered a complete warehouse portal that replaced spreadsheets and WhatsApp coordination overnight. The bilingual interface alone saved our supervisors hours of daily back-and-forth.

Ahmed Al-Rashidi

Operations Manager, Carry Go Logistics

We gave Omar a complex spec — multi-tenant marketplace, wallet ledger, real-time dashboards — and he came back with clean architecture and zero compromises on data integrity. Rare to find that combination.

Khalid Mansour

CTO, Spare Parts Platform

Replies within 24 hours

I'm currently open to full-stack and backend-architecture work. Tell me what's broken or what you're trying to launch.

Start a conversation
Read the résumé