Kiriakos K.
Tech Lead: API Experience Platform
Experience
Nov 2023 - Present
1 year 11 monthsHamburg, Germany
Tech Lead: API Experience Platform
OTTO
- Eliminate friction in API development within the IT organization through technological tools or organizational changes.
- Technologies used: Keycloak, Terraform, CI/CD (GitHub Actions), Node.js, Redocly, AWS (ECS, Lambda, EKS, RDS, SNS, SQS, Route 53, EFS, S3...), Kubernetes, PostgreSQL, Postman, OpenAPI, AsyncAPI, Kafka, Pact.io, Docker, CDE, WSO2, Axway Amplify, Gravitee.
Apr 2022 - Sep 2023
1 year 6 monthsBackend Engineering Lead
AMVLET / SCOVR
- Built the backend, ML, chat, and infrastructure landscape for the SCOVR app.
- Led the backend team.
- Technologies used: Kotlin, Quarkus, Hibernate, FaceTec, Keycloak, Terraform, CI/CD (GitHub Actions), Python, TensorFlow, Keras, GloVe, FastAPI, Gunicorn, ELM, AWS (EKS, RDS, SNS, SQS, EC2, Route 53, EFS, S3, DocumentDB...), Kubernetes, PostgreSQL, Postman, OpenAPI, Docker, Mesibo, dockerized localdev.
Jan 2022 - May 2022
5 monthsHamburg, Germany
Service Rewrite
BDK (via 58 agents)
- Replaced an old JavaEE data import service that only allowed JDBC integration with a modern tech stack providing REST and GraphQL APIs.
- Technologies used: Java, Quarkus, Jenkins, Ansible, CI/CD, AWS, Kubernetes, Terraform, Hasura, React, PostgreSQL, dockerized localdev.
Nov 2021 - Dec 2021
2 monthsPoC Bridge between Cardano and Filecoin
Cardano Foundation
- I received funding from the Cardano Foundation to develop a PoC bridge between the Cardano and Filecoin blockchains, enabling Cardano users to make storage contracts on Filecoin.
- This later became the project permanentum.io, which I work on in my free time.
- Technologies used: Haskell (cardano-node, Plutus, postgresql-simple), Elm, Docker, IPFS, Filecoin, devcontainers.
Jul 2021 - Oct 2021
4 monthsIngelheim am Rhein, Germany
Codebase Refactoring
Böhringer Ingelheim (via 58 agents)
- Supported and coached the team.
- Reduced technical debt, improved software development hygiene, optimized use of state stores in the frontend, and fixed countless bugs.
- Technologies used: TypeScript, Angular, Redux, Java (Spring Boot, Hibernate, OpenAPI, ArchUnit), Node.js, OpenShift, MinIO.
Nov 2017 - Jun 2021
3 years 8 monthsGermany
Team Lead - Software Engineering
PwC Digispace
- Built a high-throughput software engineering department, led the team, and did hands-on development.
- Guided the transformation from a matrix organization to self-directed teams.
- Set up developer recruiting.
- Promoted developer culture.
- Introduced an agile mindset across staff and partners.
- Produced the first PwC Assurance software products developed in Germany.
- Championed lean principles, servant leadership, and leading by example.
- Designed and implemented various blockchain product ideas.
- Technologies used: Java, Vue, Elm, Spring, Haskell, Python, various web libraries (npm, Maven, Hackage), scikit-learn, NLTK, GitLab, Kubernetes, K3s, Ansible, Ethereum.
Apr 2015 - Oct 2017
2 years 7 monthsGermany
IT Consultant
Monday Consulting
- Provided IT consulting on application architecture (CoreMedia, WebForms, and greenfield solutions) and enterprise architecture.
- Led integration projects (including the Boots.com relaunch).
- Supported the OTTO B2C team as a senior engineer.
- Introduced best practices in product development, company culture, and software engineering.
- Technologies used: TOGAF, Git, Jenkins, Bamboo, Linux, JEE 7, Java 8, JavaScript, Bash, Spring, Maven, UML, common sense, OpenStack, Kubernetes.
Sep 2013 - Apr 2015
1 year 8 monthsGermany
Technical Lead
Glanzkinder GmbH (Cancom Group)
- Technical leadership of a 12-member team (8 developers).
- Managed workflows, requirement modeling, and served as Scrum Master.
- Formalized conventions, testing, and pair programming.
- Introduced best practices, software development, and client consulting.
- Technologies used: Git, Jenkins, Linux, JEE 7, PHP 5, JavaScript, Bash, Python, Liferay, GlassFish 3.1, ExtJS, Java, Spring, Maven, UML, Scrum.
Oct 2012 - Sep 2013
1 yearGermany
Senior Backend Developer
Glanzkinder GmbH (Cancom Group)
- CMS design, requirement modeling, and CMS development.
- Advised on backend architecture, framework development, and data mining.
- Technologies used: UML, PHP 5, SQL (various flavors), JavaScript, Python, Linux, Git, CakePHP, Yii.
Oct 2009 - Dec 2009
3 monthsDeveloper
Lectus Publishing
- Automated internal IT processes.
- Developed CMS (Joomla extensions and vanilla PHP).
- Built web spiders and handled SEO.
- Technologies used: PHP, JavaScript, MySQL, AutoIt v3, cURL.
May 2009 - Oct 2012
3 years 6 monthsLead Developer
KIND Studios
- Project management, CMS development (Yii, WordPress), framework development, and Linux development.
- Technologies used: AWS, UML, PHP 5, SQL (various flavors), JavaScript, Python, Linux, Git, Yii, jQuery, MooTools, AutoIt v3, Photoshop, GIMP.
Jul 2008 - Oct 2009
1 year 4 monthsFounder & Developer
aether3d.com
- 3D engine development and CMS development.
- Technologies used: Shockwave 3D, PHP, JavaScript, MySQL, Linux.
Aug 2007 - Aug 2008
1 year 1 monthGreece
Military Service
- Compulsory military service in Greece.
May 2003 - Jul 2007
4 years 3 monthsEvent Management
LP loving-people.com
- DJ bookings.
- Marketing.
- Venue scouting.
Languages
Greek
NativeGerman
AdvancedEnglish
AdvancedEducation
Oct 2001 - Jun 2006
Höhere Technische Lehranstalt Serres
Bachelor, Civil Engineering · Civil Engineering · Serres, Greece
Oct 1998 - Jun 2001
Lyceum Chrisoupolis
Greece
Oct 1996 - Jun 1998
Gymnasium Keramoti
Keramoti, Greece
...and 3 more
Certifications & licenses
TOGAF 9 Certified
The Open Group
Computing for Data Analysis
Johns Hopkins University
Machine Learning
Stanford Engineering
Introduction to Artificial Intelligence
Stanford Engineering
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