Ibrahim Yassin
Abu Dhabi · UAE

IbrahimYassin

Technical Team Lead and Senior .NET Developer

I build and run the payment, access-control and e-commerce systems behind Abu Dhabi’s live events for the Department of Culture and Tourism. Ten years of .NET, a team of fifteen, and systems designed to keep working when the network does not.

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About

Ten years of .NET, now leading the people who ship it

I lead a 15-person team at Lenador Systems that runs live event platforms for Abu Dhabi’s Department of Culture and Tourism. I architect the payment, access-control and e-commerce systems behind the Abu Dhabi International Book Fair, and I stay hands-on in .NET, Azure and CI/CD.

Before that I led the technical go-live of Fonterra across nine APAC countries, ran an application management team at Kantar, and taught C# and Azure to around 700 students.

6
engineers hired and onboarded
2
team members promoted
3
production releases per event cycle

The team

15 engineers, one delivery cadence under Scrum with mandatory code review.

Backend3
Frontend3
Flutter3
Kotlin1
QA2
Security1
Infrastructure2

Selected systems

Systems that hold up at peak

Six pieces of production work at Lenador Systems, all running for the Department of Culture and Tourism.

Payments

Book Fair POS and NFC cashless platform

Architected the point-of-sale and cashless platform used across the fair, with automated daily reconciliation. It is offline-first by design, so checkout never waits on the server at peak while it scales out.

700+POS devices
60,000+transactions per 10-day event
3events a year
  • .NET
  • Azure
  • Network International
  • NFC
Access control

Speed gates

An offline-first gate system for 16-hour operating days. Local logging with auto-sync and a shared NFC cache cut re-entry time by 80%.

24gates
40,000+peak-day entries
  • SignalR
  • Emirates ID NFC
  • QR
E-commerce

Kalima

DCT’s web and mobile platform for catalog and translation management, order processing, and local and international shipping through Aramex. Live and handed over.

  • Web
  • Mobile
  • Aramex
Platform

Multitenant event platform and Book Fair app

A multitenant platform for exhibitors, POS sales and reconciliation, plus the Book Fair Flutter app with AI-powered book recommendations.

  • Multitenancy
  • Flutter
  • Recommendations
Applied AI

AI for events and reporting

A text-to-SQL MCP server, an LLM-powered BI chatbot and an AI storytelling kiosk, led from architecture review to delivery.

  • MCP
  • RAG
  • LLMs
Delivery

From four hours to ten seconds

Moved production to Azure Container Apps and Container Registry, chosen over AKS because production runs only 10 days per event. Jenkins pipelines with an on-premises Docker registry raised UAT releases from 2 to 4 per month.

Bars to scale. 10 s is 0.07% of 4 h, so its bar is drawn at minimum width.

  • Azure Container Apps
  • Container Registry
  • Jenkins
  • Docker

Design approach

Offline-first, so the queue never waits on the server

At peak hours the system must not stall while the server scales up. Every terminal keeps selling locally and syncs when the link is back. Cut the link below and watch the terminals carry on.

Server128sales synced
Link up · 0 sales waiting locallySimulation with made-up sales, not live data.

Experience

Where the work happened

  1. Dec 2024
    to present

    Technical Team Lead and Senior .NET Developer

    Lenador Systems · Abu Dhabi, UAE

    • Lead a 15-person cross-functional team under Scrum with mandatory code review. Hired and onboarded 6, promoted 2, shipped 3 production releases per event cycle.
    • Architected the payment, access-control and e-commerce systems behind the Abu Dhabi International Book Fair, running at 99.9% uptime across 3 events a year with 99% cashless adoption.
    • Cut production deployments from 4 hours to about 10 seconds, and lead the team’s applied-AI work from architecture review to delivery.
  2. May 2022
    to Nov 2024

    Technical AMS Lead and Senior Software Engineer

    3 Stars Technology / Kantar · Dubai, UAE

    • Led a team of 6 developers, analysts and support engineers as Technical Lead for Application Management Services, holding 98% SLA compliance.
    • Led the technical go-live for Fonterra across 9 APAC countries, including Australia, New Zealand, Thailand, Malaysia and Singapore. That covered cutover, hypercare and client coordination for 20,000 users.
    • Delivered Trade Promotion Management for Suntory Thailand across 3 branches, cutting accrual and rebate errors by 90% after fixing recurring SAP/ERP-to-TPM feed defects with SQL.
  3. Dec 2019
    to Apr 2022

    Senior Software Developer

    S-Base · Khartoum, Sudan

    • Led and mentored 8 developers across 9 projects for sub-contracting clients. Built ASP.NET MVC and WinForms applications for ERP, healthcare and education used by 1,000+ people.
  4. Apr 2018
    to Nov 2019

    Senior Software Developer

    Arab Sea Information Systems · Sudan

    • Designed and delivered 4 ASP.NET MVC and C# WinForms ERP applications and maintained legacy .NET systems.
  5. Oct 2016
    to Mar 2018

    Programming Instructor

    Aptech Computer Education · Sudan

    • Taught C#, .NET Framework and Azure to about 700 students across 6 cohorts.
  6. Apr 2015
    to Sep 2016

    Junior Software Developer

    Soft Jata Su Co. Ltd · Sudan

    • Built and maintained .NET features for an HR system.

Toolkit

What I build with, and what I only know

Backend and architecture
  • .NET Core
  • ASP.NET Core
  • C#
  • Web API
  • Entity Framework Core
  • Dapper
  • LINQ
  • SignalR
  • Microservices
  • Clean / hexagonal architecture
  • DDD
  • CQRS
  • REST
  • Multitenancy
  • Offline-first systems
Cloud and DevOps
  • Microsoft Azure
  • Container Apps
  • Container Registry
  • Application Insights
  • Azure SQL
  • Docker
  • Jenkins
  • CI/CD
  • Git
  • Gitea
Payments and integrations
  • NFC payments
  • Network International
  • Emirates ID (NFC)
  • QR access control
  • Aramex
  • SAP / ERP integration
Data and AI
  • SQL Server
  • PostgreSQL
  • Redis
  • pgvector
  • LLM integration
  • RAG
  • MCP servers
  • Prompt engineering
  • Ollama
  • OpenAI API
  • ChromaDB
Frontend and mobile, team-led
  • Angular
  • React
  • Blazor
  • Flutter
  • Kotlin
Leadership
  • Scrum / Agile
  • Sprint planning
  • Code review
  • Mentoring
  • Stakeholder management
  • SLA management
Working knowledge
  • Kubernetes
  • Terraform
  • GraphQL

Education

  • Bachelor of Information TechnologyNational Ribat University, Sudan · 2010 to 2015

Certifications · 2026

  • Model Context Protocol, introduction and advancedAnthropic via Coursera
  • Scrum Master Certification SpecializationLearnQuest via Coursera
  • The Product Owner ProfessionSkillUp via Coursera
  • Prompt Engineering for LLMsEdureka via Coursera

Languages

  • ArabicNative
  • EnglishFull professional proficiency

Contact

Get in touch

For technical leadership, architecture and payment-systems conversations, email is the fastest route.

[email protected]
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