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Farhat Ullah.
Full Stack & AI EngineerRemote worldwideOpen for new projects

Farhat
Ullah.

I build ERP integrations that pass audits, AI systems that run unattended, and products that scale past their first hundred tenants.

Seven years, thirteen countries, zero abandoned deployments. Remote-first, and on site when it matters. Founder of TABSAP Software Company.

See the workStart a project
Farhat Ullah, founder and principal engineer at TABSAP Software Company
Upwork
Top Rated Plus · 100% Job Success
Fiverr
Level 2 Seller · since Aug 2021
Education
BS Computer Science
Entity
Wikidata Q139538322

Serving Saudi Arabia · United Arab Emirates · Czech Republic · United Kingdom · United States · Australia · France · Germany · Poland · Malaysia · Thailand · South Africa · Pakistan

01By the numbers

Seven years, measured.

Every figure here is verifiable. Where a number isn't yet confirmed, it isn't on this page.

Years engineering
7+Since 2019
Continents served
5Asia · Europe · Africa · Australia · N. America
Upwork Job Success
100%Top Rated Plus
Domains under management
~77SSL + CDN at scale
API endpoints shipped
374TABSAP LMS
Records screened
5,032Umbrella review, dual-blinded
02Selected work

Featured case studies

All case studies →
01ERP

ZATCA Phase 2 e-invoicing on Odoo 19 Enterprise

Live ZATCA Phase 2 e-invoicing integration for a multi-branch F&B operator, including a custom down-payment invoice numbering scheme and a later read-only compliance audit run directly against production.

Read-only audit scripts. Production never at risk.

Client
Multi-branch F&B group, Saudi Arabia
Year
2025
  • Odoo 19 Enterprise
  • Python
  • XML-RPC
  • ZATCA API
02ERP

Two Czech payment gateways brought to the Odoo App Store

Built and published two payment gateway connectors for the Czech market — Pays.cz and Comgate — after establishing that Odoo 18 had no working e-commerce integration for either.

Client
Gumová Střecha
Year
2026
  • Odoo 18
  • Python
  • Pays.cz API
  • Comgate API
03ERP

Automating construction progress billing under ZATCA Phase 2

Advance recovery and retention generated automatically on every progress invoice, at the correct accounts and VAT treatment — after testing proved the original design never fired in the real workflow.

Fifteen of fifteen tests passed against a feature that never once ran in production.

Client
Construction contracting firm, Saudi Arabia
Year
2026
  • Odoo 19 Enterprise
  • Python
  • XML-RPC
  • ZATCA Phase 2
03Services

Eight things I do well.

Eight things I do well. Most engagements start with one and grow into three.

01

Odoo ERP Implementation & Custom Modules

ERP that matches your process, not the other way around.

  • Custom Odoo module development for your specific workflow
  • Data migration from legacy systems or spreadsheets
  • Staged rollout with a staging environment before go-live
02

ZATCA Phase 2 Compliance (Saudi Arabia)

Live e-invoicing clearance/reporting integration, plus an audit of what you already have.

  • Live ZATCA Phase 2 integration on your Odoo (or other ERP) instance
  • In-app clearance/reporting status visibility
  • Compliance audit of an existing ZATCA integration
03

AI Systems: RAG, Agents & Automation

Retrieval chatbots, lead scoring, and agent workflows that run unattended.

  • RAG pipeline over your own documents or knowledge base
  • LangGraph or n8n agent workflow for a specific operational task
  • Evaluation harness to measure retrieval and generation quality
04

SaaS Product Engineering

Multi-tenant products from architecture to deploy.

  • Multi-tenant architecture design and data isolation model
  • Next.js or Laravel product build, front to back
  • CI/CD pipeline setup
05

Security & Infrastructure Audit

Find the multi-tenant hole before your users do.

  • Findings report on tenant isolation, access control and privilege paths
  • Remediation pull requests for the issues found
  • Server and infrastructure configuration review
06

WooCommerce / WordPress Engineering

Custom checkout flows, performance work, and malware recovery.

  • Custom WooCommerce checkout flow built to a design, not a plugin's defaults
  • Malware removal with root-cause fix, not just a clean scan
  • Google Safe Browsing delisting after a flagged domain
07

Mobile Apps (Flutter / React Native)

One codebase, two stores, real backend.

  • Cross-platform app in Flutter or React Native
  • Backend API the app actually depends on, not a mock
  • App Store and Play Store submission
08

IT Training (TABSAP Training Center)

Web dev and IT courses taught from live project work.

  • Cohort-based or 1:1 web development track
  • Curriculum drawn from real, shipped project work rather than toy exercises
  • Hands-on practice with the same stack used in production engagements
04Agency & products
TABSAP Software Company

Agency

Software agency building ERP integrations, AI systems and multi-tenant products for clients across the Middle East, Europe, Asia-Pacific, Africa and North America.

See services→
TABSAP Software Company

Products

TABSAP is transitioning from services to product. The agency work funds it; the products are the thesis.

See products→
05Research
Research

Compression methods and systematic review.

Semantic Neuron Consolidation identifies semantically similar neurons, groups them by functional similarity, and consolidates redundant units to shrink models while preserving performance. Being prepared for a peer-reviewed venue with multi-seed runs, significance testing and full ablations.

Read the research →
Records identified
10,206Scopus · IEEE · OpenAlex · Lens
Unique records screened
5,032Dual-blinded
Search-string recall
81.8%22-paper gold standard
Methodology
PRISMA2020 + PRIOR · AMSTAR 2
Farhat Ullah, founder and principal engineer at TABSAP Software CompanyWho you would be working with

No account manager. No handoff.

Farhat Ullah is a Senior Full Stack and AI Engineer with 7+ years building production systems for clients across thirteen countries, from Saudi Arabia and the UAE to the Czech Republic, the UK, the US and Australia. He founded TABSAP Software Company, delivers Odoo ERP and ZATCA Phase 2 compliance work, and builds RAG and agent-based AI systems on Laravel, Next.js and Python.

Work is not subcontracted. Whoever you speak to is who writes the code — see how I work for access, confidentiality and what this practice does not hold.

More about me
06FAQ

Questions people actually ask.

What is ZATCA Phase 2 and do you handle it?
ZATCA Phase 2 is Saudi Arabia's e-invoicing integration phase, which requires invoices to be cleared or reported to the tax authority in near real time. Yes — I deliver live Phase 2 integrations on Odoo, including clearance status indicators inside the ERP UI, plus compliance audits of implementations that are already running.
Can you take over an existing Odoo instance?
Yes, and most Odoo engagements start exactly there. The first step is an infrastructure audit before any code changes: modules, data integrity, server configuration and upgrade path. You get a prioritized remediation plan, so the decision about what to fix first is yours and not a surprise.
Do you audit AI-generated codebases?
Yes — it's a dedicated service line. The common findings are consistent: broken tenant isolation, unprotected storage buckets, and privilege escalation paths in generated row-level-security policies. Audits are delivered in two steps, a findings report first and remediation second, so you control scope after seeing the results.
Do you work with international clients?
Yes. Current and past work spans Saudi Arabia, the Czech Republic, Australia, the United States and the United Kingdom. Overlap hours are arranged per client, and delivery is async-first with documented handoffs, so progress does not depend on us being awake at the same time.
Do you build with AI or just build AI systems?
Both. AI agents are part of how I deliver — multi-agent orchestration is my actual working method for audits and large sweeps, which is why throughput is unusual for a solo-led shop. Separately, RAG pipelines and agent systems are a core service I build for clients.
What does an engagement look like?
Discovery call, then a scoped proposal with fixed deliverables, then staged delivery against a staging environment, then handover with documentation. You see working software at each stage rather than a single reveal at the end.
Do you offer support after launch?
Yes — retainers cover monitoring, security patching and feature work. The handover documentation is written so that another engineer can maintain the system without me, which is a deliberate design goal rather than a nice-to-have.
Do you teach?
Yes. TABSAP IT Training Center runs web development and IT courses, taught from live project work rather than from tutorial exercises. Tracks run as cohorts or one-to-one.

Have a system that needs to work in production?

Tell me what's breaking — or what you're building.

Start a projecthello@farhatullah.com
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