Principal Software Engineer
Current
Mar 2023 - Present
AeroLeads people directory · profile
Theonas Chartomatzis Email & Phone Number
Principal Software Engineer
at
OnGen Ltd
LinkedIn matched
✓ Verified Jul 2026
3 data sources
Profile completeness 86%
Current company
Role
Principal Software Engineer
Location
Edinburgh, Scotland, United Kingdom
Company size
Who is Theonas Chartomatzis? Overview
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Quick answer
Theonas Chartomatzis is listed as Principal Software Engineer at OnGen Ltd, a with 6 employees, based in Edinburgh, Scotland, United Kingdom. AeroLeads shows a matched LinkedIn profile for Theonas Chartomatzis.
Theonas Chartomatzis previously worked as Senior Software Engineer at Contractpodai and Principal Software Engineer at Wood Mackenzie. Theonas Chartomatzis holds Msc Software Engineering And Telecommunications, City College from The University Of Sheffield.
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Email format at OnGen Ltd
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OnGen Ltd
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Profile bio
About Theonas Chartomatzis
Theonas Chartomatzis is a Principal Software Engineer at OnGen Ltd. They is proficient in English. Colleagues describe them as "Theo joined our organisation as a Senior Engineer and quickly progressed through the ranks to become a Principal Engineering. He has led one of the most foundational and impactful initiatives as part of our new SaaS platform. Not only is he a great engineer he is an incredibly humble individual who thrives in challenging environments with a calmness that keeps his team delivering high-quality work whilst also having fun. I would not hesitate to recommend Theo and I hope our working relationship continues for a number of years to come!" and "I really enjoyed working with Theo during my time at Craneware. He was extremely professional and completed his work to the highest of standards. Theo was always happy to assist in helping me improve my coding abilities and to answer fellow colleagues' questions. He continually pushed himself to learn new tech or improve his existing knowledge to the benefit of his team and to Craneware. "
Current workplace
Theonas Chartomatzis's current company
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7 roles
Theonas Chartomatzis work experience
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Senior Software Engineer
Leading the implementation of authorization and authentication for seamless user-to-user and service-to-service communication in a greenfield application.Enhancing legacy system by integrating clients through SCIM standard.Implementing and fixing features at the full-stack level to meet clients' requirements.
Apr 2022 - Feb 2023
Principal Software Engineer
Managing a software team focused on scaling, with a focus on designing and implementing strategies to meet performance targets while controlling costs.Collaborating with cross-functional teams to establish software standards by creating a blueprint of the existing software.Collaborating with senior leadership and product stakeholders to align requirements with architectural decisions.
Dec 2020 - Mar 2022
Senior Software Engineer
As a Technical Lead, oversaw and guided a team for 1 year while driving architectural and technology decision making. Implemented performance optimizations utilizing cost-effective strategies to achieve desired results.Feature development while collaborating with stakeholders and cross-functional teams to ensure API compatibility with multiple clients.Boosted team morale, resulting in improved productivity by fostering stronger team bonding.
Jan 2019 - Dec 2020
Senior Software Engineer
Enhancement of platform's main pipeline performance through optimized data parsing.Successfully migrated data storage from ArangoDB to Elastic while implementing efficient service adjustments and utilization.Optimized the performance of the application's main dashboard through analysis and implementation of Azure Search.Adoption of streaming technologies for efficient and reliable data processing.Designed and implemented customer-driven features through thorough analysis and focused design.Successfully integrated with US government APIs, such as CMS, to validate documents.Analyzed and enhanced performance of high-traffic product to ensure optimal results.Partnered with US hospital customers to design and implement customized reporting solutions.
Sep 2016 - Jan 2019
Senior Software Engineer
Contributed to the development of core system features through thorough analysis, design, and implementation during software development. Led database optimization efforts and oversaw successful data migration.Provided maintenance and customized installations to align with customers' legacy systems.Collaborated with customers and medical equipment representatives (Toshiba, Hitachi, and Philips) to ensure successful on-premise installations.Developed custom integrations to interact with legacy systems and share data with on-premise systems, through web portal implementationsImplemented data migration from customer's legacy system to the core products Netmed360 RIS and MedCenterEMR through analysis, design, and software implementation.
Jan 2012 - Aug 2016
Software Engineer
Developed back-end and business logic, implementing and optimizing core parts of the application.Implemented integration between external ERP systems and Interworks CRM. Improvement of Interworks CRM Sync app with new features and enhanced data syncing with Interworks CRM.
Dec 2007 - Dec 2011
2 education records
Theonas Chartomatzis education
Msc Software Engineering And Telecommunications, City College
Informatics & Communications
FAQ
Frequently asked questions about Theonas Chartomatzis
Quick answers generated from the profile data available on this page.
What company does Theonas Chartomatzis work for?
Theonas Chartomatzis works for OnGen Ltd.
What is Theonas Chartomatzis's role at OnGen Ltd?
Theonas Chartomatzis is listed as Principal Software Engineer at OnGen Ltd.
Where is Theonas Chartomatzis based?
Theonas Chartomatzis is based in Edinburgh, Scotland, United Kingdom while working with OnGen Ltd.
What companies has Theonas Chartomatzis worked for?
Theonas Chartomatzis has worked for Ongen Ltd, Contractpodai, Wood Mackenzie, Craneware, and Infocape Ltd.
How can I contact Theonas Chartomatzis?
You can use AeroLeads to view verified contact signals for Theonas Chartomatzis at OnGen Ltd, including work email, phone, and LinkedIn data when available.
What schools did Theonas Chartomatzis attend?
Theonas Chartomatzis holds Msc Software Engineering And Telecommunications, City College from The University Of Sheffield.
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