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Hi, I'm Kostas Apostolopoulos

Head of NodeOps @ VeChain
Go to my resume!
Resume

About Me

I am a software engineer with 20 years of experience in web development, cloud computing, blockchain and DevOps. I wrote my first line of code in 1997 on an Amstrad 6128 computer, and I never stopped coding ever since. I graduated top of the 2003 class in my Computer Science BSc and earned my MSc in Adv. Software Engineering with distinction. I have a proven track record of cutting down on operational toil and solving complex problems with high quality software. Beyond coding, I enjoy elevating others in their professional journey through mentoring, presenting, and blogging.

Following my BSc in Computer Science, I worked for SiEBEN (now called Pobuca), an award-winning Microsoft partner in Greece, where I designed, implemented and deployed N-Tier web applications for large corporations like Phillip Morris and The Economist. Then, I moved to Dublin, where I earned my first-class honours MSc degree in Adv. Software Engineering from UCD. Following that, I worked as a Software Development Engineer in the development team of KeyedIn Konfigure, a rapid application development platform. In 2016 I joined Equifax (NYSE: EFX) as a Senior Software Development Engineer, developing web applications that ingest and process large volumes of data, to deliver useful, actionable business insights to its customers. Within Equifax, I transitioned into a DevOps role, building tools and services to support the full DevOps lifecycle of hundreds of projects. In 2019, I worked as a Technical Design Expert for Novartis (SWX: NOVN), where I implemented robust CI/CD pipelines for their globally distributed Salesforce applications and consulted several teams in DevOps best practices. I am currently working as a Senior DevOps engineer for Vechain, where I design, implement and maintain their highly available (99.999%) and scalable global node clusters.

My Specialities

Web Development

13+ years of professional web development for large multinational organizations

Cloud Computing

12+ years of professional working experience with Azure and AWS PaaS and IaaS services

DevOps and SRE

7+ years of professional working experience in cloud infrastructure automation, CI/CD pipelines, monitoring, alerting

Skills & abilities

Agile, DevOps, Site Reliability Engineering
IaC, Immutable Infrastructure, Terraform, Ansible, Docker
Azure DevOps, GitHub Actions, Jenkins, Octopus Deploy
Telemetry, Logging, Prometheus, Grafana, Checkly
Azure, AWS
PowerShell, Bash
C#, LINQ
ASP.NET (MVC, WebApi, Core, Entity Framework)
Microsoft SQL Server, MongoDb, Azure Storage, AWS S3
NUnit, Selenium, k6
Javascript, Typescript, HTML5, CSS3, Bootstrap

Language skills

Greek
English
German

Education & jobs

October 2022 - today Head of NodeOps Vechain | Dublin, Ireland
March 2019 - September 2022 Technical Design Expert Novartis | Dublin, Ireland
May 2018 - March 2019 Senior Software Development Operations Engineer Equifax | Dublin, Ireland
April 2017 - May 2018 Senior Software Development Engineer Equifax | Dublin, Ireland
April 2016 - April 2017 Software Development Engineer Equifax | Dublin, Ireland
October 2014 - April 2016 Software Development Engineer KeyedIn Solutions | Dublin, Ireland
September 2013 - September 2014 MSc in Computer Science University College Dublin | Dublin, Ireland
October 2010 - August 2013 Software Development Engineer SiEBEN Innovative Solutions | Athens, Greece
January 2008 - July 2009 Customer Service The Web | Larissa, Greece
September 2003 - August 2010 BSc in Computer Science Technological Educational Institute | Larissa, Greece
September 1990 - June 2003 Primary and Secondary Education Ellinogermaniki Agogi | Athens, Greece
Latest blog posts
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14 Nov, 2025
Comments

AI Agents on the Blockchain

Super excited to be hosting a workshop at UCD School of Computer Science next Thursday, November 20th, 2025! 🚀 We’ll dive into AI Agents on the Blockchain, learning how to use the VeChain SDK to interact...

Read more

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