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Yiannis KoulYK
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Yiannis Koul

@yianniskoul

Full-Stack developer building scalable microservices, web, and mobile apps with Node.js, React, and AWS.

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What I'm looking for

I want to build scalable microservices end-to-end—web, APIs, and mobile—using Node.js/NestJS, React/Angular, and AWS. I’m looking for a team that values maintainability, automated testing, and reliable deployments (CI/CD) so I can ship high-quality products.

I’m a full-stack developer with extensive experience designing and building scalable microservices, web, and mobile applications across research, lotteries, airline ticketing, and SMS campaigns. I focus on efficient, maintainable, high-quality software and I enjoy connecting frontend experiences to reliable backend systems.

In my recent work, I design and develop scalable microservices using Node.js, NestJS, and GraphQL, manage PostgreSQL databases, and deliver Angular-based frontend solutions. I also implement automated testing with Playwright and deploy services on AWS to keep releases dependable and repeatable.

Earlier roles strengthened my backend depth and integration skills: I built an SMS campaign platform with SpringBoot (Reactor, CQRS) and MongoDB, developed REST APIs for data management, and created internal release-management tooling with Express.js. I’ve also architected event-driven, asynchronous workflows with Apache Camel, built lottery gaming interfaces with ReactJS, delivered automated testing with Protractor, and worked on a warehouse census Android mobile web app using Sencha Touch—along with ERP systems and IT infrastructure experience.

Experience

Work history, roles, and key accomplishments

Education

Degrees, certifications, and relevant coursework

UA

University of the Aegean

Master’s Degree, Information Systems Management

2011 - 2012

Earned a Master’s degree in Information Systems Management at the University of the Aegean from 2011 to 2012.

University of the Aegean logoUA

University of the Aegean

Engineer’s Degree, Information and Communication Systems

2005 - 2011

Earned an Engineer’s degree in Information and Communication Systems at the University of the Aegean from 2005 to 2011.

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