Open to opportunities

Beytullah Erd

@beytullaherd

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Senior software developer and infrastructure architect driving reliable systems.

Turkey

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What I'm looking for

I seek a technical leadership role building scalable, secure enterprise systems where I can drive architecture, mentor teams, and improve delivery through automation and best practices.

I am a senior software developer, designer and infrastructure architect with broad experience across Java, .NET and full-stack web technologies. I deliver scalable microservice architectures, enterprise integrations and domain-specific systems for healthcare, government and energy sectors.

Throughout my career I’ve led teams and acted as technical lead on projects including document management, hospital information systems, energy license automation and mainframe integrations. I emphasize SOLID principles, OOP/AOP and pragmatic design to build maintainable solutions.

My technical toolbox includes Java 19, Spring Boot, Hibernate, Spring Security, Angular, React, Node.js, .NET/C#, databases (PostgreSQL, MS SQL, Oracle, IBM Db2, MongoDB) and CI/CD with Jenkins, Docker and Rancher. I also have experience with mainframe technologies, COBOL, JCL and enterprise reporting tools.

I thrive in collaborative, mission-driven environments where I can lead architecture decisions, mentor teams and deliver production-grade systems that balance performance, security and operational reliability.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Republic of Turkey Social Security Institution

Jun 2024 - Present (1 year 9 months)

Led development and infrastructure architecture for document management and Belgenet integration, designing microservice solutions and improving system reliability across mainframe and web components.

Spring Boot Microservice Architecture Jenkins CI CD Hibernate

Senior Java Software Engineer

KATOT LLC

Jan 2024 - Jun 2024 (5 months)

Led backend and team efforts building microservices with Java 19 and Spring Boot, integrating PostgreSQL/MongoDB, AWS services, and messaging (RabbitMQ) to deliver scalable APIs.

Spring Boot PostgreSQL MongoDB AWS RabbitMQ Redis Docker Jenkins

Senior Software Development Engineer

Turkish Employment Agency

Feb 2023 - Jan 2024 (11 months)

Developed and maintained .NET web services and enterprise applications (SOAP/WCF/REST), optimized database routines and supported integrations with Oracle and SQL Server.

.NET C#WCF RESTful Services Oracle Pl SQL SQL Server T SQL Visual Studio

Senior Software Development Engineer

Hisar Hospital Intercontinental

Mar 2020 - Apr 2023 (3 years 1 month)

Built HIMS hospital information systems as a full‑stack developer, delivering Java Spring Boot backends and Angular frontends and supporting .NET desktop modules to improve clinical workflows.

Spring Boot Angular MS SQL Server .NET C#Liquibase Docker Jenkins DevOps

Senior Java Software Engineer

Energy Market Regulatory Authority

Feb 2018 - Feb 2020 (2 years)

Developed the energy license application and automation system using Spring framework and PrimeFaces, improving license processing and automation workflows.

Spring Framework PrimeFaces Hibernate Liquibase MS SQL Server Java ORM

Senior MVC ASP.NET Developer

Ministry of Culture

Nov 2017 - Jan 2018 (2 months)

Delivered an MVC ASP.NET libraries project and managed SQL Server deployments on Windows Server to support national library services.

ASP.NET MVC C#SQL Server Windows Server IIS T SQL Web Development

Engineer

KOSGEB

Jan 2017 - Oct 2017 (9 months)

Led embedded and Arduino projects including an incubation machine, smart cradle, and smart building prototypes, delivering hardware‑software integrated solutions.

Arduino Embedded Systems C C++IoT Prototyping Firmware Sensors

Engineer

TUBITAK

Aug 2016 - Apr 2017 (8 months)

Worked on a magnetic-field-based free energy research project, contributing to prototype development and experimental testing.

Research & Development Prototypes Electrical Systems Experimental Design Matlab

Senior Software Designer

HAVELSAN

Dec 2012 - Jun 2016 (3 years 6 months)

Designed and developed enterprise systems including document management, military health automation, and e‑invoicing using .NET and Oracle/SQL Server, improving operational efficiency.

.NET C#Oracle SQL Server Desktop Applications ASP.NET Windows Server

Software & Security Systems Specialist

Erdoğan Yazılım Bilişim ve Güvenlik Sistemleri

Jan 2009 - Jun 2012 (3 years 5 months)

Developed access control and security systems, middleware, and enterprise web/desktop applications across .NET, Java and Delphi platforms for commercial clients.