17.10.2026 aktualisiert

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Lead Solution Architect | Senior Backend Engineer | AI, Cloud & Enterprise Platforms

München, Deutschland
Weltweit
Software Engineering
München, Deutschland
Weltweit
Software Engineering

Profilanlagen

refaat-ktifan-ai-solution-architect.pdf
refaat-ktifan-ki-loesungsarchitekt.pdf
refaat-ktifan-senior-backend-entwickler.pdf
refaat-ktifan-senior-backend-engineer.pdf
refaat-ktifan-pimcore-commerce-engineer.pdf

Über mich

Lead Solution Architect and Senior Backend Engineer with 10+ years of experience designing and delivering AI platforms, cloud-native systems, enterprise integrations and commerce solutions. Hands-on across AWS, Kubernetes, Node.js, PHP, Go and distributed architectures, from strategy to production.

Skills

AI AgentsPHPAPIsCloud-EngineeringData ArchitectureE-CommerceEnterprise Architecture FrameworkNode.jsSoftware ArchitectureTypoScriptPrometheusSolution ArchitectureSymfonySystemarchitekturAWS CDKAzure AutomationIT-ArchitekturBackendAWS ECSBackend-programmierungInfrastrukturautomatisierungs-FrameworksNestJSTerraformAWS EKSGolang
AI & Automation
I build production-ready AI systems focused on real business impact. Experience with automation, RAG pipelines, and agent-based workflows that reduce manual work and improve efficiency.
Tech: OpenAI, LangChain, CrewAI, vector databases, NLP, document processing
Backend & Architecture
Design and implementation of scalable backend systems with clean architecture. Focus on APIs, microservices, and long-term maintainability.
Tech: Node.js, NestJS, Python, Symfony, REST, GraphQL
Cloud & DevOps
Building and operating reliable cloud infrastructure with strong focus on scaling, automation, and stability.
Tech: AWS, Azure, Docker, Kubernetes, Terraform, CI/CD
E-Commerce & PIM
Strong experience in headless commerce and product data systems. Building scalable platforms and integrations.
Tech: Vendure, Pimcore, Shopify, payment integrations
System Integration
Connecting complex systems and building robust integrations across platforms and services.
Tech: REST APIs, GraphQL, ERP/CRM integration, event-driven systems
Data & Performance
Designing data architectures and optimizing system performance for high-load environments.
Tech: PostgreSQL, MongoDB, Redis, Elasticsearch, ETL

Erfahrung

Berufserfahrungmehr als 10 Jahre
Freelancer seit2023

Sprachen

ArabischMutterspracheDeutschMutterspracheEnglischverhandlungssicher

Projekthistorie

Lead AI Solution Architect & Senior Full-Stack Engineer Copy

Merck KGaA

Pharma und Medizintechnik

>10.000 Mitarbeiter

Leading the architecture, engineering, and technical delivery of AMARA, an internal enterprise AI and agentic workflow platform at Merck KGaA. Transforming an experimental single-user AI assistant into a secure, scalable, multi-user enterprise platform.

  • Technical leadership and coordination of the development team, including task delegation, sprint planning, backlog management, code reviews, mentoring, and delivery oversight.
  • Project planning, requirements engineering, technical roadmaps, stakeholder alignment, architecture documentation, ADRs, and technical specifications.
  • Hands-on development of Python/FastAPI backend services, AI agents, LLM orchestration, APIs, connectors, plugins, and enterprise integrations.
  • Integration of Azure OpenAI, Azure AI Foundry, Microsoft Entra ID, MSAL, OAuth 2.0, and enterprise authentication.
  • Architecture of RAG, document ingestion, embeddings, semantic search, and permission-aware knowledge retrieval.
  • Design of agent orchestration, MCP/tool calling, approval workflows, audit trails, and secure execution.
  • Multi-user authorization, resource-scoped permissions, PostgreSQL, and data governance.
  • Full-stack architecture with Next.js, React, TypeScript, and shared API contracts.
  • Quality assurance, automated testing, CI/CD, security standards, and production readiness.
  • Collaboration with Product Owners, Enterprise Architects, UX/UI designers, and business stakeholders.

Solution Architect – OGuardAI Enterprise AI Governance Platform

Oronts

Internet und Informationstechnologie

< 10 Mitarbeiter

Designed and developed a self-hosted AI governance platform enabling organizations to securely deploy Large Language Models while protecting sensitive data and enforcing enterprise policies. The platform provides centralized AI security, PII protection, auditability, and policy-driven AI execution across cloud and on-premise environments.
Responsibilities
  • Designed the overall platform architecture and technical roadmap
  • Developed a secure AI gateway for enterprise LLM applications
  • Built PII detection, anonymization, tokenization, and data restoration workflows
  • Implemented policy-based request validation and AI governance controls
  • Designed role-based access control, authentication, and authorization
  • Built comprehensive audit logging and traceability for AI interactions
  • Developed support for OpenAI, Anthropic Claude, and self-hosted LLM providers
  • Implemented secure proxy architecture for enterprise AI deployments
  • Designed scalable REST APIs and SDK architecture
  • Integrated monitoring, observability, and operational diagnostics
  • Led architecture decisions, implementation, testing, and technical documentation
  • Ensured GDPR compliance, security, scalability, and maintainability
Technologien
TypeScript, Python, Node.js, NestJS, GLiNER, spaCy, OpenAI, Anthropic Claude, MCP, REST APIs, Docker, Kubernetes, Redis, PostgreSQL, JWT, OAuth2, RBAC


Lead AI Solution Architect – Exfinity Multi-Tenant AI Commerce Platform

Exfinity GmbH

Internet und Informationstechnologie

< 10 Mitarbeiter

Designed and led the development of a cloud-native, multi-tenant AI commerce platform combining conversational AI, hybrid search, real-time availability, booking, analytics, and enterprise integrations. Owned the end-to-end solution architecture from concept through production, establishing the technical foundation, AI governance, cloud platform, and engineering standards.
Responsibilities
  • Owned the end-to-end solution architecture and technical roadmap
  • Designed a distributed microservices and event-driven architecture
  • Architected an 8-agent AI runtime with orchestration, RAG, memory, and tool execution
  • Designed an enterprise MCP platform with secure, permission-based AI tools
  • Built hybrid search using BM25, vector search, embeddings, and recommendations
  • Designed scalable multi-tenant domain models and service boundaries
  • Architected AWS cloud infrastructure using Infrastructure as Code
  • Implemented AI governance, RBAC, GDPR compliance, observability, and security
  • Defined APIs, integration patterns, and communication across platform services
  • Led architecture reviews, engineering standards, and technical decision-making
  • Collaborated with executive leadership, product stakeholders, and beta partners
  • Contributed hands-on across backend engineering, AI systems, and cloud infrastructure
Technologien
TypeScript, Go, Node.js, Mastra, OpenAI, Anthropic Claude, MCP, RAG, OpenSearch, Kafka, Redis, AWS ECS Fargate, Lambda, API Gateway, DynamoDB, S3, EventBridge, Cognito, Terraform, Docker, Kubernetes

Pimcore Developer & Solution Architect – PimTX Enterprise Governance Framework

Designed and developed PimTX, an enterprise framework for Pimcore that extends native object handling with transaction management, concurrency control, and governance capabilities. The framework improves reliability, consistency, and maintainability for enterprise Pimcore installations while remaining upgrade-safe and fully integrated with the Pimcore ecosystem.
Responsibilities
  • Designed the overall framework architecture and extension model
  • Developed advanced Pimcore object transaction management
  • Implemented cooperative locking and concurrency control
  • Built idempotent object processing and mutation handling
  • Developed optimistic versioning and conflict resolution
  • Implemented approval workflows and governed data mutations
  • Extended Pimcore using Events, Services, and reusable components
  • Built audit logging, observability, and execution tracing
  • Optimized performance for large enterprise Pimcore installations
  • Developed reusable APIs and extension points for custom implementations
  • Performed testing, code reviews, troubleshooting, and technical documentation
  • Ensured scalability, maintainability, and compatibility with Pimcore 11 & 12
Technologien
Pimcore 11/12, PHP, Symfony, Doctrine ORM, Redis, Locking, Idempotency, Versioning, Event System, Workflow Engine, Docker, Kubernetes


Pimcore Asset Pilot – Enterprise Asset Automation Platform

Oronts

Internet und Informationstechnologie

< 10 Mitarbeiter


Designed and developed an enterprise-grade automation platform for Pimcore 12 that intelligently organizes digital assets using configurable business rules. The platform provides scalable processing, governance, auditability, and a modern management interface for enterprise environments while remaining fully upgrade-safe.
Responsibilities
  • Designed the overall solution architecture and technical foundation
  • Developed a configurable rule engine using Symfony ExpressionLanguage
  • Implemented asynchronous processing with Symfony Messenger and RabbitMQ
  • Built automated asset classification, routing, and processing workflows
  • Designed locking, concurrency control, and fault-tolerant processing
  • Implemented audit logging, execution history, and full traceability
  • Developed a Pimcore Studio UI for rule management and monitoring
  • Built reusable, modular, and upgrade-safe Pimcore extensions
  • Optimized performance for large enterprise asset libraries
  • Wrote technical documentation and performed testing, code reviews, and troubleshooting
  • Ensured scalability, maintainability, security, and long-term platform evolution
Technologies
Pimcore 12, PHP, Symfony, Symfony Messenger, RabbitMQ, ExpressionLanguage, Studio UI, Docker, Kubernetes

Vendure Data Hub – Enterprise Commerce Integration Platform

Oronts

Internet und Informationstechnologie

< 10 Mitarbeiter

Designed and developed a modular enterprise data integration platform for Vendure, enabling reliable synchronization between commerce systems, ERP platforms, marketplaces, search engines, and external services. The platform provides scalable ETL pipelines, feed generation, data transformation, and automation to support high-volume commerce environments.
Responsibilities
  • Designed the overall solution architecture and integration strategy
  • Developed modular ETL pipelines for data extraction, transformation, and loading
  • Built reusable connectors for ERP systems, marketplaces, and external APIs
  • Implemented product, inventory, pricing, and catalog synchronization workflows
  • Developed feed generation for search engines and third-party platforms
  • Built event-driven processing using queues and asynchronous workflows
  • Designed scalable background jobs for large-volume data processing
  • Implemented monitoring, logging, and error handling for reliable operations
  • Optimized performance and data consistency across distributed systems
  • Wrote technical documentation and performed testing, code reviews, and troubleshooting
  • Ensured scalability, maintainability, and long-term platform evolution
Technologies
Vendure, TypeScript, Node.js, NestJS, GraphQL, PostgreSQL, REST APIs, ETL, RabbitMQ, Redis, OpenSearch, Docker, Kubernetes

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