Ph.D.

Diploma (MEng)

Staff Product Manager, Database

The core mission of the Database Group is to build the application code, the tools and frameworks that allow every GitLab feature to interact with the Database in the most reliable and performant way possible. We also build tools and product features that enable any GitLab team member to efficiently develop code that interacts with the database, test against production grade datasets and make informed, data driven decisions before shipping any update to the GitLab product.

The mission of the Application Performance Group is to continuously identify the bottlenecks that affect GitLab's performance and availability and address them. We also work towards providing better tooling, metrics and visibility to development teams with the goal to allow them to make better data-driven decisions when developing new features or iterating on existing ones.

Senior Product Manager, Application Performance and Database Groups

Working on both the Database and Sharding Groups at GitLab, focusing on how we can scale GitLab's architecture 10-100x through partitioning, horizontal and vertical database and application sharding and various other optimizations at all levels of the application.

Senior Backend Engineer, Database and Sharding Groups

Responsible for the architecture, scalability, application performance, and data growth of GitLab's database layer.

As a member of the small, vertical Database Group, we are concerned with the performance and scalability of any code that touches the Database and enable all other teams to efficiently develop solutions against Terabyte size data sets.

At the same time, we are proactively identifying performance bottlenecks and address them as early as possible to let GitLab continue to grow at the fast pace it does.

Senior Backend Engineer, Database Group

Founding engineer of Meltano, Gitlab's ELT and Data Analytics toolset. I was focused for two years on making Meltano the best open source product for managing data pipelines, dashboards, and data orchestration.

Starting with an idea to offer a fully open source DataOps toolset, we managed to grow a strong team inside Gitlab and build Meltano to a product that allows users to connect to various APIs and Data sources, schedule pipelines, extract data, transform the raw data and analyze the final results with only a few clicks.

At the same time, I have personally built and maintained more than 20 open source projects (including extractors, loaders, transformations and data models for various sources) that users around the globe use with Meltano or as independent projects. Fostering and helping such a community grow has been an amazing experience, which by itself is a reward on top of everything else we were trying to achieve.

Meltano Site: https://meltano.com/
Meltano Project at Gitlab

Senior Backend Engineer, Meltano

Co-founder of Innuere Labs, a technology provider for creating interactive experiences that respond to hand gestures and body movement through the use of motion capture and 3D visualization technologies.

We enable users to control presentations, real time applications, interactive advertisements or games through the use of their hands and body.

Our focus is on interactive shop windows that dynamically respond to shoppers' movement and allow them to interact with the showcased products.

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Innuere: present active infinitive of innuō
Verb: To give a nod, sign; To hint with a gesture.

Software Architect

Algorithms, models and back-end infrastructure for processing asset related transactions in high bandwidth data streams, real time analysis and avoidance of race conditions, ad-hoc analytics for asset transactions. Working with Ruby on Rails for anything back-end related.

Chief Software Architect

Co-founder of Saini.gr, a service for finding tutors, articles and classes about anything a user would ever want to learn. Within one year of operation, Saini.gr became the largest hub in Greece for finding tutors and private lessons and continues to grow rapidly by adding articles, tutorials, advanced search for institutes and B2B services towards the educational community.

Led the work on second screen and companion applications.

Other key task areas:
1. Web 2.0 and Mobile 2.0 reposition of the company's client interface and APIs. 
2. Scaling of the Data Management Infrastructure, migration to clustered and no SQL solutions and building from scratch infrastructure for Big Data analytics and BI. 
3. Extensive architecture, innovative use cases and user experience design for various projects.

Senior Software Architect

Requirement Analysis, Design and development of a framework for creating e-shops for wholesale companies and suppliers. The focus of the framework was on Business to Business transactions (B2B) between the wholesaler and the retailers that he is working with. The main advantages of our system in comparison to existing commercial software were (at the time of release) the support for online catalogues and albums with more than 100 thousand products and support for the back-end systems of a wholesale company.

Major customers: SIDAL S.A. (one of the larger suppliers of iron and steel in Crete), Taxiarchis Bros S.A. (one of the larger wholesale companies of jewelry components in Greece)

Software Engineer

Consultant for The General Secretariat for Research and Technology (GSRT) of the Hellenic Ministry of Development. Responsible for the analysis and inspection of the due to be delivered Information System of the Hellenic Research and Technology Special Skills Observatory (EPETE) and the corresponding server infrastructure.

IT Consultant

My most important responsibilities in Mavatar were to design our back-end architecture, plan ahead and worry about how we were going to reach our next capacity milestone (next one or two orders of magnitude each time), make sure that the appropriate processes were in place and that we could address any issue that may come our way as we were growing as a team and as a platform.

During my tenure as the chief architect of Mavatar, we have:
- built a SaaS platform for Shoppable Content Publishing and scaled it to support most of the largest retailers in the US and Europe.

- scaled our Ruby On Rails infrastructure to be able to validate, load, classify and dynamically categorize millions of products per day

- built infrastructure that enables real time checking of any supported product's information, availability, price per size/color together with the available offers/coupons for each specific product. The result is an engine that allows the user to check a product from any supported st

Software and Systems Architect

(Compulsory military service) Senior architect, responsible for the design and development of the novel Information System for the Hellenic Navy (HN). The system was delivered successfully after 9 months of development and is used by most of the administrative staff of HN. Honored by the Chief of the Hellenic Navy with "Appreciation", the highest morale prize awarded to militant forces or junior officers of the Hellenic Navy. Served in high security positions in the Naval Training Command, the General Staff of HN and finally the office of the Chief of the Hellenic Navy.

Staff Product Manager, Database and Cloud Native Storage

Staff Product Manager at Timescale

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