Sefa Teyek
Head of Technology & AI, Healthcare with over 20 years of professional experience in the development, management, and migration of online systems across tourism, travel, and healthcare services.
He has built and maintained reliable, scalable, and secure systems aligned with business and operational needs. He currently leads technology strategy and delivery of AI-native enterprise solutions for U.S. healthcare and transportation clients — architecting cloud-based systems with AI-first development methodologies and driving the adoption of AI-powered tools across the full software development lifecycle.
Professional Experience
Head of Technology & AI, Healthcare
Sep 2019 – Apr 2026
- Served as Head of Technology & AI for the Healthcare business unit, leading technology strategy and delivery of AI-native enterprise solutions for U.S. healthcare and transportation clients.
- Defined end-to-end technical vision, architected cloud-based systems using AI-first development methodologies, and drove adoption of AI-powered tools across the full software development lifecycle.
- Led cross-functional engineering teams and worked closely with business leadership to align technology initiatives with client and market needs; oversaw team formation, staffing, and delivery across multiple concurrent Healthcare projects.
- Identified AI opportunities, built proof-of-concept solutions, and guided projects from initial architecture through production deployment while ensuring scalability, security, and reliability.
- As Enterprise Cloud Architecture and Engineering Leader, led development of three project modules: cross-contract data/work-item copying, version-to-version data replication, and full contract replication including files.
- As Enterprise Software Architect and Technical Leader, worked concurrently with two teams on separate U.S. customer projects — backend development of a contract management system using the Microservices Architecture Pattern (.NET Core 3.1, Azure Service Bus, SQL Server, Azure Functions, Blob, Redis) and full-stack development of a nurse-facing mobile application (.NET Core 3.1, Azure Service Bus, SQL Server, Azure Functions, Blob, CosmosDB, Vue.js, Capacitor.js).
- Contributed to backend development of a global call center system hosted on AWS Cloud using .NET Core 3.1, SNS/SQS, and RDS.
- Created backend APIs for CRM and financial systems automating payroll, tax reports, and employee timesheets using .NET Core 3.0, RabbitMQ, Azure Service Bus, and ElasticSearch.
Senior Full Stack Developer
Nov 2017 – Sep 2019
- Developed two projects simultaneously: a Tourism Agency System and a Corporate Travel B2B tourism system.
- Created WCF services and worked with IdentityServer4, .NET Core, ASP.NET, ElasticSearch, MongoDB, Knockout.js, Redis, CosmosDB, and SQL Server.
- Led Azure PaaS and IaaS projects and estimated migration efforts from data center to Azure for the Tourism Agency System.
- Architected Corporate Travel System and provided XML integration with flight and tourism companies.
Senior Full Stack Developer & Team Leader
Jun 2009 – Nov 2017
- Managed a team developing the Online Tourism Agency Management System for FTI, a global tourism agency.
- Integrated with tourism providers for importing reservations and implemented SAP integration for financial needs.
- Developed Online Accounting Software covering 44 destinations and serving a minimum of 5 million customers annually.
- Used ASP.NET MVC, SQL Server, RabbitMQ, and AngularJS to support complex global tourism operations.
Education
Bachelor of Science in Economics
2009
Certifications
- Microsoft MCSA — Microsoft Certified Solution Associate, SQL Server 2012, July 2013
- Microsoft MCSD — Microsoft Certified Solution Developers, June 2013
- Microsoft HTML5 with JavaScript and CSS3 Specialist, June 2013
- Microsoft Azure Fundamentals, October 2020
Core Competencies
- Constantly renewing himself and adapting quickly to new technologies
- Sees software development as more art than work, with strong problem-solving ability
- Advanced knowledge and experience in software processes and process improvement
- Effective team leadership and experience improving team productivity
- Adapting software teams to new processes; experienced in training
- Experienced in Agile and Scrum software development methods
- Advanced knowledge of Object-Oriented Programming
- Advanced knowledge of Test-Driven Development
- Advanced coding standards and code quality practices
- Advanced Refactoring, Code Smells, and Anti-Patterns knowledge
- Advanced Design Patterns and Design Principles
- Advanced Cloud and Docker knowledge
Domain Experience
- Tourism
- Healthcare
- Telecommunications
- Restaurants
- Energy
Technical Stack
- .NET Core, ASP.NET MVC, C#
- Azure Service Bus, Azure Functions, Blob Storage, Azure PaaS / IaaS
- AWS Cloud, SNS/SQS, RDS
- SQL Server, CosmosDB, MongoDB
- Redis, RabbitMQ, ElasticSearch
- Vue.js, AngularJS, Knockout.js, Capacitor.js
- WCF Services, IdentityServer4, XML integrations
- Microservices Architecture Pattern