Khaled Esmail Mohamed

Senior Backend Engineer and Technical Team Lead with extensive experience designing and operating scalable, secure backends

and microservices in Node.js and TypeScript. Strong track record leading teams, improving system performance and reliability,

and delivering complex products across fintech, aviation, e-commerce, marketing, and healthcare. Hands-on with AWS, Azure,

and other clouds, event-driven architectures, CI/CD, and distributed data systems

• IBM Certified Application Developer - Cloud Solutions v3, 2019
• Cloud Application Development Essentials, 2019
• IBM Mentor, 2020, DeliverCloud Course for University Students.

• Arabic, Native
• English, Fluent

• Underwriting & Qosmos, Qred Bank AB — Senior Backend Developer

Sep 2025 – Present

Develop scalable Node.js and TypeScript microservices for credit

evaluation and funding, used by the underwriting team to assess SME

applications and manage credit risk.

Design secure RESTful APIs and event-driven services on AWS, ensuring

performance, reliability, and alignment with financial compliance

requirements

Implement automated testing and CI/CD pipelines to protect data

integrity, harden security, and enable frequent, low-risk releases

Qosmos underwriting platform: building the backend for Qred's next-

generation underwriting system, enabling underwriters to process

applications faster, apply consistent risk rules, and integrate data from

multiple internal and external sources

Tech: Node.js, TypeScript, AWS, microservices, REST APIs, automated testing,

CI/CD, agile

• TEDS, SAS - Scandinavian Airlines - Senior Backend Developer

Nov 2024—Sep 2025

I designed and developed scalable data pipelines for processing mission-critical aviation data, including real-time flight statuses (FIFE) and booking records

(PNR) and flight schedules. These pipelines ensured high throughput and reliability by leveraging Azure services, such as Azure Functions and Cosmos DB

Service Bus, Blob Storage, and API Management (APIM)

Key integrations with third-party systems like Amadeus (booking data, inventory) and FlightSuite (flight legs, schedules) were achieved through event

Driven architectures and adapters, enabling seamless data ingestion and transformation, I also implemented observability tools and automated workflows

And robust documentation to enhance system maintainability

This project honed my expertise in cloud-native architectures, real-time data processing, and cross-system collaboration, directly supporting TEDS' goal of

Delivering scalable aviation data solutions

Technologies: Node.js, Azure Functions, Cosmos DB, Azure Service Bus, APIM, Event Bus, and Azure Blob Storage

• Mozodi App — Technical Team Lead and Solution Architect

Oct 2024 – Sep 2025

Architected and led the delivery of a B2B e-commerce platform with

four applications (Customer app, Driver app, Admin dashboard,

Supplier portal) from concept to production

Designed a multi-tenant architecture supporting 75+ suppliers, 5,800+

products, and a catalog availability rate of ~89.5%, backed by NestJS +

PostgreSQL (Supabase)

Built end-to-end ordering, delivery, and payment flows, including

complex multi-supplier cart logic, geolocation-based delivery zones,

dynamic fees, and secure KNET payment integration

Delivered measurable business impact: processed 1,187 valid orders,

58.4% completion rate, 95.4% payment success, generating 15,946 KWD

in revenue with a 23.01 KWD average order value

Owned cloud and DevOps architecture on DigitalOcean and Vercel

(App Platform, Droplets, Spaces, VPC, CI/CD) with monitoring, logging,

and alerting for high availability and scalability

Tech: Flutter (Dart), Next.js, React, TypeScript, Tailwind CSS, NestJS, PostgreSQL,

Supabase, DigitalOcean (App Platform, Droplets, Spaces, VPC), Vercel, REST

APIs

• Laverne Integration Solution — Senior Backend Developer

Sep 2024 – Apr 2025

Built a serverless order processing platform on AWS Lambda for Salla,

handling up to 500k+ orders per brand per month across multiple

brands, with strict latency and reliability SLAs

Designed event-driven pipelines using SQS, Lambda, and RDS

(PostgreSQL) for real-time webhook ingestion, historical order backfills (7-

day rolling windows), and abandoned cart recovery

Implemented multi-brand, multi-database architecture with dynamic

connections, transactional upserts, and migration support using

Sequelize, ensuring data isolation and consistency

Added robust observability and resilience: structured JSON logging

(Pino), retries, DLQs, and detailed error tracking via CloudWatch metrics

and logs

Tech: AWS Lambda, Amazon SQS, Amazon RDS (PostgreSQL), TypeScript,

Node.js, AWS SDK v3, Sequelize ORM, Jest, Pino, REST APIs, Salla Webhooks

• Apsis One, Scandinavia — Senior backend developer

Oct 2022—Oct 2024

I designed and developed a high-traffic marketing automation platform used by over 3,600 customers worldwide as a senior backend developer at

APSIS. This mission-critical application handles terabytes of data and requires real-time tracking and reporting

To achieve this scalability and performance, I utilized a robust backend architecture built with Node.js, TypeScript, and Golang. Additionally, I leveraged a

comprehensive suite of AWS services, including ECS, EC2, Lambda, DynamoDB, CloudFormation, S3, API Gateway, CloudWatch, OpenSearch, IAM, and

SQS.

This project provided me with the opportunity to showcase my ability to design and implement scalable backend systems while collaborating with a

Talented team to deliver a core component of APSIS's marketing automation platform

• First Abu Dhabi Bank (FAB), Dubai — Cloud Application Developer

May 2019 – July 2022

Fab, the largest bank in the United Arab Emirates, implemented online banking services, and the FAB app is rated over 4 stars in the Finance category on the

App Store and has been downloaded over 100,000 times on Google Play. I was part of the Digital Data Platform (DDP) team, responsible for capturing and

Orchestrating the persistence of personal and transactional data for customers, the platform integrated with various technologies and systems to

manage different data types across multiple repositories and perform defined analytics. The DDP was connected to several other technology components within the solution, including backend services, FS processes, integration processes, and

CRM. It was provisioned on an IBM private cloud solution, with Oracle as the underlying OLTP database architecture

My responsibilities involved collaborating with business analysts to gather and understand the business requirements, and then translating them into

Clean and maintainable code, following project development guidelines The development process utilized agile software development (Scrum

Methodology, Node.js with a microservices architecture, and involved working with Docker, Postman, GitLab, and SQL Server database

• Nomadd Desert Solar Solutions, Saudi Arabia — Senior backend developer

Feb 2022— Sep 2022

At Nomadd Desert Solar, I played a pivotal role in developing innovative solutions specifically designed to address the challenges of cleaning solar panels

In desert climates, as a core member of the team, I led the design and deployment of automated solar panel cleaning systems optimized for harsh deserts

conditions.

Key technologies utilized in this project included TypeScript for backend development, along with IoT (Internet of Things) technologies such as ESP32

Arduino and Raspberry Pi for hardware integration and control

• JazzCash, Pakistan — Cloud application developer

July 2020 – August 2021

JazzCash is the fastest-growing mobile wallet service provider in Pakistan, backed by the largest telco, Jazz Currently, we have over 13 million registered users

Mobile accounts my role involved developing the backend for iOS, Android apps, and portals for consumers and merchants to facilitate transactions like

sending money, Careem vouchers, food ordering, movie tickets, and more

Responsibilities included leading a small team of three developers to deliver user stories, which involved creating detailed low-level design documents and

converting them into code using Node.js, MongoDB, microservices architecture, and OpenShift as our cloud environment

• DHA, Dubai Health Authority, Dubai — Cloud Application Developer

April 2020—June 2020

After the COVID-19 pandemic, the Dubai Health Authority (DHA) initiated the DHA-COVID-19 project to track COVID-19 cases and integrate with HASANA

(Panorama) and other backend services for various use case scenarios related to COVID-19 case management, the goal was to cover all Dubai citizens,

With a population of 3.38 million registered in 2020

Responsibilities included developing business requirements and translating them into clean and maintainable code, following project development

guidelines. The system was developed using agile software development (Scrum methodology), Node.js, with a microservices architecture, and OpenShift

Additionally, the Backend for Frontend (BFF) design was utilized

• Salesforce projects (Cloud Concept) (+6 projects): MEA — Cloud developer

Jun 2018—May 2019

Responsibilities include configuring Salesforce objects, fields, record types, page layouts, validation rules, and process builders Developing

Custom functionality using Apex, Visualforce pages, and components