Gregor Ambrozic, Developer in Vrhnika, Slovenia
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Gregor Ambrozic

Bio

Gregor is a CTO and senior engineer with 23 years of experience in building software and performing audits. He has led startups from early product stages through 50x revenue growth and multimillion-dollar funding rounds, managing everything from rebuilds and migrations to scaling architecture. Gregor uses AI throughout his workflow, significantly increasing his speed. He focuses heavily on UX and the finer details.

Portfolio

Freelance
Linux, AngularJS, jQuery, Grails, Hibernate, Spring, Java, Node.js, Angular...
Charter Itinerary Ltd
Agile Software Development, Jira, Slack, Node.js, Angular, JavaScript, MongoDB...
FlyZUUM.com
Linux, Python, Angular, Hibernate, Gorm, Java, Grails, Machine Learning...

Experience

  • SQL - 15 years
  • Java - 13 years
  • Hibernate - 9 years
  • Spring - 7 years
  • Angular - 5 years
  • Grails - 4 years
  • Team Leadership - 3 years

Preferred Environment

Node.js, Angular, JavaScript, Java, React, Express.js, MongoDB, PostgreSQL, Agile Software Development

The most amazing...

...thing I've built is a team that innovates relentlessly and stays for the long haul, on a best-in-class product I engineered solo for its first two years.

Work Experience

Freelance Software Engineer

2014 - PRESENT
Freelance
  • Performed a technical audit of an online wellness platform, built on React, React Native, and Kotlin.
  • Developed a Spring MVC rolling road (trucks on trains) booking application for a client company.
  • Built a Spring MVC back end for JWS/TLS communication with a system for fiscal verification of invoices.
  • Developed a fuel card authorization and billing solution.
  • Created a Liferay intranet solution for a mid-sized company.
  • Created a Magnolia-powered website with apps for a client company.
Technologies: Linux, AngularJS, jQuery, Grails, Hibernate, Spring, Java, Node.js, Angular, React, React Native, MongoDB, PostgreSQL, MySQL, APIs, Puppeteer, Next.js, Python, Front-end, Full-stack, TypeScript, Google Sheets, Web Scraping, WebSockets, Front-end Development

CTO

2020 - 2025
Charter Itinerary Ltd
  • Joined as an early key team member and CTO, responsible for defining and executing the full technical vision of Charter Itinerary from inception.
  • Built, deployed, and maintained a best-in-class SaaS platform for superyacht charter professionals, consistently praised by customers for usability and reliability.
  • Took the platform from zero to a mature, production-ready product adopted by professional charter teams.
  • Designed and implemented a sea-based routing algorithm connecting any two water-based points for realistic charter route planning.
  • Scaled the engineering organization from 1 to 8, establishing processes, standards, and a sustainable delivery culture.
Technologies: Agile Software Development, Jira, Slack, Node.js, Angular, JavaScript, MongoDB, AWS Lambda, Amazon Web Services (AWS), APIs, Puppeteer, Python, Front-end, Full-stack, Mapbox, TypeScript, Mapbox API, PostgreSQL, Google Sheets, Web Scraping, WebSockets, Front-end Development

CTO

2014 - 2019
FlyZUUM.com
  • Led engineering from prototype to the product that raised $5 million.
  • Co-designed and developed a patent-pending AI/ML solution to analyze private jet traffic and provide pricing in real time.
  • Developed the first intelligent online private jet booking in the world.
  • Developed a fleet and booking management software for private jet operators.
  • Led and managed an empowered team of innovative senior professionals in a development team. Scaled the engineering team from 1 to 7.
Technologies: Linux, Python, Angular, Hibernate, Gorm, Java, Grails, Machine Learning, Amazon Web Services (AWS), APIs, Front-end, Full-stack, TypeScript, Google Sheets, Web Scraping, WebSockets, Front-end Development

Software Engineer

2012 - 2014
Fieldoo.com
  • Developed core and new features of a sports social network website in Spring MVC.
  • Provided database optimization for a high-load website.
  • Created various web scrapers and crawlers to fetch data used for analyses.
  • Did ad-hoc engineering problem solving.
  • Cooperated with owners to help shape new features.
Technologies: Linux, jQuery, MySQL, Spring MVC, Java, APIs, Front-end, Web Scraping, Front-end Development

Software Engineer

2011 - 2012
Epilog d.o.o
  • Developed new back-end features with Java and PL/SQL.
  • Implemented solutions on-site with customers.
  • Created new UI components to be used in the flagship product.
  • Designed and implemented a new translation module in the back end.
  • Communicated with clients remotely and on-site.
Technologies: SQL, Oracle PL/SQL, Swing, Java

Software Developer

2006 - 2011
Medius d.o.o.
  • Developed back-end application features with EJB, JBoss, and Hibernate.
  • Developed UI features with Eclipse SWT and RCP.
  • Did ad-hoc database queries and programming.
  • Built an automatic reporting solution with Eclipse BIRT.
  • Developed web application features with JSF and SEAM.
  • Maintained production applications.
Technologies: Hibernate, Linux, Seam, Oracle, Enterprise Java Beans (EJB), Eclipse RCP, Java, APIs, PostgreSQL, Web Scraping, Front-end Development

Junior Software Developer

2005 - 2006
Microgramm d.o.o.
  • Developed web application features.
  • Developed features for web programming interfaces.
  • Administrated PostgreSQL database and ad-hoc queries.
  • Wrote documentation.
  • Wrote automated tests and did manual testing.
Technologies: JavaScript, CSS, HTML, Perl, Front-end

Junior SQL Developer

2003 - 2005
Simobil d.o.o.
  • Rewrote the automatic reporting system.
  • Wrote Ad-hoc SQL queries for data used in other departments.
  • Took care of data warehouse administration over the weekends.
  • Implemented features on data marts.
  • Optimized SQL queries for automatic periodic reporting.
Technologies: PL/SQL, Oracle SQL, Unix

Experience

FlyZUUM.com

I worked as a CTO and full-stack engineer for a private jet booking company. The tech stack included Java, Spring, Grails, Angular, MySQL, and AWS. We built the world's first intelligent private jet booking system with AI matching.

CharterItinerary.com

https://charteritinerary.com
CharterItinerary.com is an industry-leading, all-in-one software platform designed specifically for yacht charter professionals, including brokers, central agents, captains, and crew. It streamlines luxury yacht charter operations by enabling users to create custom itineraries, generate tailored yacht proposals, manage bookings, and handle related workflows efficiently—all in one tool.

I was a key team member and CTO, responsible for defining and executing Charter Itinerary's full technical vision from inception. I handled all engineering and most product decisions in the first two years, serving as the sole developer and owning architecture, implementation, deployment, and production support. I built, deployed, and maintained a best-in-class SaaS platform for superyacht charter professionals, consistently praised by customers for usability and reliability.
Image of Why Should Java Developers Give Grails a Chance? publication
Publication

Why Should Java Developers Give Grails a Chance?

https://www.toptal.com/developers/grails/should-java-developers-give-grails-chance

Education

2008 - 2017

Master's Degree in Computer Science

FAMNIT, Univerza na Primorskem - Koper, Slovenia

2003 - 2007

Bachelor of Science Degree in Computer and Information Science

FRI, Univerza v Ljubljani - Ljubljana, Slovenia

Certifications

MARCH 2010 - PRESENT

Oracle Database 11g Administrator Certified Associate

Oracle Corporation

FEBRUARY 2010 - PRESENT

Oracle Database SQL Expert

Oracle Corporation

AUGUST 2009 - PRESENT

Sun Certified Java Programmer 6.0

Sun Microsystems

Skills

Libraries/APIs

jQuery, Node.js, Puppeteer, React, Mapbox API, Scikit-learn, Keras

Tools

Eclipse IDE, IntelliJ IDEA, Subversion (SVN), Google Sheets, Jira, Eclipse RCP, Git, Slack

Languages

HTML, Java, JavaScript, TypeScript, Perl, CSS, Python, SQL, Python 3, Groovy

Frameworks

Hibernate, Spring MVC, Grails, Angular, Spring, Next.js, Swing, Seam, Gorm, AngularJS, Express.js, React Native

Platforms

Oracle, Windows, Amazon Web Services (AWS), Linux, AWS Lambda, Mapbox, Unix, Amazon EC2, AWS Elastic Beanstalk, Visual Studio Code (VS Code), AWS IoT

Storage

PostgreSQL, Oracle PL/SQL, Oracle SQL, PL/SQL, MySQL, MongoDB

Paradigms

Agile Software Development, Extreme Programming

Other

APIs, Front-end, Full-stack, Web Scraping, WebSockets, Front-end Development, Team Leadership, Remote Team Leadership, Machine Learning, Enterprise Java Beans (EJB), Computer Science

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