Form Z4 / Portfolio
Record 2026-11
Cairo
Izzedeen Alfarra
aka z4devعز الدين الفرا
I build and run the backend systems that move FHIR health-insurance claims, and I integrate national healthcare platforms across KSA, UAE, Oman and Qatar.
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- 01Role
- Mid-Level Software Engineer & Integration Officer
- 02Employer
- Kayan Healthcare Technologies · Remote, Dubai UAE
- 03Focus
- Backend · HL7 FHIR R4 · AI (LLMs, RAG, OCR)
- 04Based
- Cairo, Egypt
4
Countries with national-platform integrations
KSA · UAE · Oman · Qatar
3
National platforms integrated
Dhamani · FSA · NAPHIS
10,000+
Daily active users served
at 99.9% uptime, DigiFly
50%
API response time cut
800ms to 400ms, DigiFly
01Profile
Where backend engineering meets healthcare.
I'm Izzedeen Alfarra (z4dev), a Node.js and TypeScript engineer promoted to Mid-Level within a year at Kayan Healthcare Technologies. I build and run production HL7 FHIR R4 e-claims systems and integrate the national platforms Dhamani, FSA and NAPHIS across KSA, UAE, Oman and Qatar, and I build AI features with LLMs, RAG and OCR.
Before that I built backends that served 10,000+ daily users at 99.9% uptime and halved API response time. I support clients daily and join stand-ups, turning business needs into technical solutions.
How I work
- 01Own services end to end, from the first line to the live system.
- 02Ship production-ready work, with performance and code quality built in.
- 03Raise engineering quality across the team, not only in my own code.
- 04Teach what I learn: I guide job seekers and explain AI in Arabic.
- Name
- Izzedeen Alfarra, also written Ezzedeen Alfarra or Ezz El Din Alfarra. Online as z4dev.
- Languages
- Arabic (native), English (upper intermediate)
- Education
- B.Sc. Software Engineering, Al-Azhar University – Gaza, expected 2026
- Community
- TAP Ambassador since 2026; 5,600+ LinkedIn followers
02Systems
A claim's journey.
What I build, in the order a health-insurance claim meets it.
01
Intake
Claims are accepted on post office infrastructure in Oman, UAE and KSA.
See the work02
Convert
JSON payloads become HL7 FHIR messages that meet each national e-claims standard.
See the work03
Validate
Claims are validated, and medical codes are checked with AI.
See the work04
Deduplicate
The switch stops duplicate submissions before they reach a payer.
See the work05
Route
Claims reach payers and national platforms across four countries.
See the work
03Selected work
Six pieces of work, in detail.
The middleware that carries FHIR claims from providers to payers, with duplicates stopped before they reach a payer.
- Context
- Kayan runs a middleware switch that routes FHIR-based health-insurance claims from healthcare providers to payers.
- My role
- I develop and operate the switch and own its fixes end to end. I am also the integration officer between the platform and payer systems.
What I built
- Built claim deduplication on the claims switch, preventing duplicate submissions from reaching payers.
- Engineer the Node.js, NestJS and TypeScript services for FHIR e-claims processing and claims lifecycle management.
- Own interoperability and onboarding issues between the platform and payer systems.
Outcome
- Duplicate submissions are stopped on the switch before they reach payers.
Dhamani, FSA and NAPHIS, connected across four countries over HL7 FHIR R4.
- Context
- National healthcare platforms in four countries, each reached through HL7 FHIR R4.
- My role
- Backend and integration engineer on the claims platform.
What I built
- Integrated the national healthcare platforms Dhamani, FSA and NAPHIS across KSA, UAE, Oman and Qatar using HL7 FHIR R4.
- Work on HL7/FHIR interoperability and e-claims automation for healthcare markets across the MENA region.
Outcome
- Three national platforms, four countries, one standard: HL7 FHIR R4.
A layer that converts JSON payloads into HL7 FHIR messages that meet Oman, UAE and KSA e-claims standards.
- Context
- Claims arrive as JSON payloads and must leave as HL7 FHIR messages that comply with national e-claims standards.
- My role
- Designed and built the conversion layer.
What I built
- Built a layer converting JSON payloads into HL7 FHIR messages compliant with Oman, UAE and KSA e-claims standards.
Outcome
- One conversion layer producing FHIR messages for three national e-claims standards.
Claim intake, validation and routing on post office infrastructure in Oman, UAE and KSA.
- Context
- Claims are accepted at post office infrastructure in Oman, UAE and KSA and need intake, validation and routing.
- My role
- Built the acceptance flow on the claims platform.
What I built
- Built claim intake, validation and routing on post office infrastructure in Oman, UAE and KSA.
Outcome
- Reduced manual work in claim handling.
AI features and REST APIs for fraud detection and CPT, ICD and HCPCS code validation, built with LLMs, RAG and OCR.
- Context
- Claims carry medical codes and documents, and both need checking before they are trusted.
- My role
- Build the AI features and the REST APIs that expose them.
What I built
- Build AI features (LLMs, RAG, OCR) and REST APIs for an AI fraud detector and for CPT/ICD/HCPCS code validation.
Outcome
- AI fraud detection and medical-code validation available as REST APIs.
Scalable backends for 10,000+ daily users at 99.9% uptime, with API response time cut by half.
- Context
- Backend systems behind the megatop.com.eg e-commerce store and a Google Play navigation app.
- My role
- Backend developer, working from concept to deployment.
What I built
- Built scalable backend systems supporting 10,000+ daily active users with 99.9% uptime.
- Cut API response time by 50% (800ms to 400ms) through query and endpoint optimization.
- Integrated secure payment gateways, increasing successful transactions by 25%.
- Designed RESTful APIs with Swagger documentation, reducing developer onboarding time by 30%.
- Implemented AWS S3 and Cloudinary storage (5,000+ uploads per month) and cut production bugs by 35% via CI/CD and code quality.
- Built the megatop.com.eg e-commerce API (auth, payments) and a Google Play navigation app backend.
Outcome
- 10,000+ daily active users at 99.9% uptime
- API response time 800ms to 400ms
- +25% successful transactions
- -30% developer onboarding time
- -35% production bugs
04AI engineering
AI, built into the claims pipeline.
I build AI features with LLMs, RAG and OCR, and ship them as REST APIs: an AI fraud detector and CPT, ICD and HCPCS code validation.
Toolkit
Currently learning
Alongside engineering I teach. I create Arabic content on AI and software for LinkedIn, YouTube and Instagram, explaining concepts such as LLMs, NLP and embeddings, and I guide job seekers as a TAP Ambassador.
05Experience
From intern to mid-level in a year.
Aug 2026 – PresentNow
Mid-Level Software Engineer & Integration Officer
Kayan Healthcare Technologies · Remote, Dubai UAE
- Backend Intern, Aug 2025
- Backend Engineer, Sep 2025 – Aug 2026
- Mid-Level, Aug 2026
- Engineer Node.js, NestJS and TypeScript services for FHIR e-claims processing and claims lifecycle management.
- Integrated national healthcare platforms Dhamani, FSA and NAPHIS across KSA, UAE, Oman and Qatar using HL7 FHIR R4.
- Built claim deduplication on the claims switch, preventing duplicate submissions from reaching payers.
- Build AI features (LLMs, RAG, OCR) and REST APIs for an AI fraud detector and CPT/ICD/HCPCS code validation.
- Run production: Docker deployments on NGINX and IIS, CI/CD releases, and Grafana Loki monitoring to keep live systems stable.
- Support clients daily and join stand-ups, turning business needs into technical solutions.
Jun 2024 – Nov 2024
Backend Developer
DigiFly Group · Cairo, Egypt (Hybrid)
- Built scalable backend systems supporting 10,000+ daily active users with 99.9% uptime.
- Cut API response time by 50% (800ms to 400ms) through query and endpoint optimization.
- Integrated secure payment gateways, increasing successful transactions by 25%.
- Designed RESTful APIs with Swagger documentation, reducing developer onboarding time by 30%.
- Implemented AWS S3/Cloudinary storage (5,000+ uploads/month); cut production bugs by 35% via CI/CD and code quality.
May 2023 – Aug 2023
JavaScript Developer Intern
Gaza Sky Geeks · Gaza, Palestine
- Built responsive web interfaces with React.js and Next.js in an agile team, with regular code reviews and Git workflows.
06Stack
The toolbox, by discipline.
- Healthcare tech
- Backend
- AI engineering
- Languages
- Data
- DevOps & monitoring
- Frontend
- Currently learning
07Credentials
Education, certifications and community.
Education
Bachelor's Degree in Software Engineering
Al-Azhar University – Gaza, Palestine
Expected 2026
Diploma in STEM (IT), Web Development
Mohammed AlNajjar School, Gaza
2019 – 2022 · GPA 4.0 (96%)
Certifications
FHIR Fundamentals
Medblocks
Docker & Kubernetes
IBM
Linux & Shell Scripting
IBM
Duolingo English Test
Duolingo
Leadership and languages
TAP Ambassador
Guiding job seekers.
2026 – Present
Tech content creator
5,600+ LinkedIn followers.
Arabic
Native
English
Upper Intermediate
08Contact
Let's talk.
contact@izzedeen.com
Coffee chat
A 30-minute conversation for developers who want a clear personal brand, an online presence that reflects their skills, and a roadmap for long-term growth. I share my own journey, what I learned and the mistakes I would avoid, whether you are just starting out or moving from writing code to building production-ready systems.
Book a coffee chat30 minutes · opens Calendly