Christos (Kitsos) Orfanopoulos

Senior Software Engineer & Technical Lead

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Summary

The short version

Nine years of building things other people depend on: five at NTUA, one in uniform, half a year at IBM inside a bank, and two and a half leading platform work at an AI healthcare startup whose software now runs in four U.S. hospitals. One published paper along the way.

Now
Senior Software Engineer, Veltiston AI
Core stack
Java · Spring Boot · React · AWS
Team
5–10 engineers, 3 countries
Cadence
Weekly production releases

What I am actually good at

What I am looking for

Hard problems with real users attached, a team that reviews each other honestly, and enough ownership to fix the root cause instead of the symptom. Remote, hybrid or Athens-based.

If the island convinced you, the Radio Center is a two-minute walk south.

Experience

Veltiston AI, two and a half years

Joined an AI healthcare startup founded by MIT Professor Dimitris Bertsimas as one of its first engineers, and grew into Technical Lead of the flagship Nurse Scheduling platform, concept to production, with teams across Greece, Boston and Morocco.

Senior Software Engineer · Veltiston AI · Athens, hybrid

May 2026 – present

  • Project lead on three projects.
  • Leads cross-functional teams of 5–10 developers: architecture, technical decisions, code reviews, sprint planning and customer delivery.
  • Mentors engineers, runs technical interviews and coordinates distributed international teams.
  • Works with Product, Design, QA and DevOps to deliver weekly production releases.
  • Java
  • Spring Boot
  • Spring AI
  • React
  • MySQL
  • AWS
  • Docker
  • Microservices

Full-stack Software Engineer · Veltiston AI · Athens, hybrid

May 2024 – May 2026

  • One of the company’s first engineers; built the flagship Nurse Scheduling platform from concept to production.
  • Led production deployments across major U.S. hospitals, working directly with hospital stakeholders.
  • Modernized legacy applications: Agile practices, engineering standards, CI/CD pipelines, documentation, automated testing and incremental refactoring.

Alongside it

Lead Software Engineer · Holistic Hospital Optimization · contract, remote

May 2024 – present

  • Software lead on AI-powered healthcare applications for U.S. hospitals.
  • Nurse scheduling, hospital length-of-stay optimization, SMART on FHIR integrations and enterprise healthcare platform work.
  • HIPAA
  • FHIR
  • Healthcare platforms

Platform work

What I shipped

Technical lead on every one of these: the architecture, the decisions, the reviews and the delivery into the hospital.

Secure and scalable, or it does not ship.

How it stays up

Observability

  • Grafana
  • Graylog
  • Sentry

Delivery

  • Docker
  • Jenkins
  • GitLab CI
  • Flyway

Testing

  • JUnit
  • Mockito
  • JaCoCo

Earlier roles

Before the startup

DevOps Engineer · IBM · Athens, on-site

November 2023 – May 2024

  • Selected for the IBM Associate Program, training in DevOps and integration.
  • Worked on the Cosmos Project at the National Bank of Greece, a core banking transformation migrating legacy PL/I and COBOL systems to Infosys Finacle.
  • Coordinated integration calls across bank subsystems to support Finacle onboarding.
  • Designed integration architecture for both the transitional coexistence state and the target state.
  • Supported DevOps operations: ticket deployments and CI/CD pipeline automation.
  • Represented IBM Greece at an international Agile & Enterprise Design Thinking bootcamp in Hamburg, February 2024.
  • Jenkins
  • Podman
  • Docker Compose
  • ELK Stack
  • Grafana
  • Jira
  • Confluence

Skills

Skills

Languages

  • Java (17–25)
  • JavaScript
  • TypeScript
  • Python
  • C++

Backend

  • Spring Boot
  • Spring Framework
  • Spring Security
  • Spring Data JPA
  • Hibernate
  • REST APIs
  • Microservices

AI

  • Spring AI
  • Ollama
  • RAG
  • Agentic AI
  • Artificial neural networks
  • Pose estimation

Frontend

  • React
  • Angular
  • HTML
  • CSS
  • Tailwind CSS

Databases

  • MySQL
  • Flyway

Cloud & DevOps

  • AWS (EC2, S3, SES, SNS)
  • Docker
  • Docker Compose
  • Podman
  • Jenkins
  • GitLab CI
  • Bitbucket Pipelines
  • Git

Observability & monitoring

  • Grafana
  • Graylog
  • ELK Stack
  • Sentry

Testing

  • JUnit
  • Mockito
  • JaCoCo

Architecture & design

  • Jira
  • Confluence
  • Figma
  • UML
  • SRS
  • Agile/Scrum

Healthcare & security

  • SMART on FHIR
  • Epic EHR
  • UKG
  • SAML 2.0 SSO
  • Microsoft ADFS
  • JWT
  • HIPAA
  • reCAPTCHA

Education

Higher education

MEng, Electrical & Computer Engineering · National Technical University of Athens (NTUA)

2017 – 2022 · GPA 8.4

  • Five-year integrated Master of Engineering in the School of Electrical and Computer Engineering, the most competitive school in Greece to get into, where only the top entrance-exam grades make it.
  • Finished in the five years the programme is designed for; the average student takes about seven and a half.
  • Thesis: compliance analysis of movement exercises using machine learning, supervised by Prof. Panagiotis Tsanakas, Dean of the School, graded with distinction, and later published on arXiv.
  • Coursework with the Dean included Operating Systems and Software Service Technologies.
  • Worked alongside the degree from the third year: part-time at first, then full-time as Director of the "Pantokrator" Foundation through the fourth and fifth.

Seminars & workshops

Publications

Published research

An M-Health Algorithmic Approach to Identify and Assess Physiotherapy Exercises in Real Time · arXiv, Cornell University

11 December 2025

  • Grew out of the NTUA thesis: judging how a physiotherapy movement is actually performed against how it should be.
  • Reads a movement as a sequence of static poses, estimated from a phone camera by a pose-estimation neural network.
  • Turns body keypoints into trigonometric angle features and classifies them with lightweight supervised models, giving per-frame pose predictions and accuracy scores.
  • Recognises whole exercises and locates the inaccuracies using dynamic programming over a modified Levenshtein distance.
  • Runs entirely client-side, which is what keeps it scalable and real time.
  • Pose estimation
  • Machine learning
  • Dynamic programming
  • Levenshtein distance
  • m-Health

Applicable to remote physiotherapy supervision: the patient’s own phone does the assessment, so nothing leaves the device.

Certifications

AI, research & engineering

Universal AI Foundational Modules · MIT Open Learning

August 2026 · Credential b8a1b1aa-1d2e-4c81-9c45-822df5f29a29

  • Foundations of modern AI, including artificial neural networks.
  • AI
  • Artificial Neural Networks

Group 1: Biomedical Research Investigators · CITI Program

May 2026 – May 2029 · Credential 76841212

  • Human-subjects research conduct and ethics, and HIPAA, the compliance side of building for hospitals.
  • Clinical Research
  • HIPAA

Docker Essentials: A Developer Introduction · IBM

May 2024

  • Docker

Language certificates

ECPE, Certificate of Proficiency in English (C2) · University of Michigan

May 2016

ECCE, Certificate of Competency in English (B2) · University of Michigan

May 2015

DELF B2, Diplôme d’études en langue française · Centre international d’études pédagogiques

February 2019

Thesis, contests and awards

Diploma thesis, 2022

Compliance analysis of movement exercises using machine learning: a system that watches how a movement is performed and judges it against how it should be performed. Supervised by Prof. Panagiotis Tsanakas, Dean of the School of ECE, who called it "marked by scientific soundness and technological originality" and graded it with distinction. Three years later it became a published paper.

Contests & awards

University life

The Independent movement

In his third year the faculty assemblies were being run by party-political groups with their own interests, and the students’ own problems were not getting a hearing. He and a few others founded an independent movement of ECE students, to get real representation by democratic means and to solve students’ issues rather than political ones.

Petition signatures
700+
Collected in
2 days
Spoke in front of
800 people
Independent representative
2 years

Volunteering on campus

Military service

Military service

Reservist Second Lieutenant, Special Forces · Hellenic Armed Forces, 575 Marine Battalion

September 2022 – 22 November 2023

  • Basic training at the Center of Special Forces, Nea Peramos.
  • Graduated 3rd in class from the Infantry Reserve Officers School, Heraklion.
  • Completed the Rangers’ Basic Training School (Guerilla Warfare School), Rentina.
  • Reported to the 575 Marine Battalion as an Officer Designate on 11 February 2023.
  • Served as Platoon Leader and Weapons Officer for a Marine Company, and as Deputy Company Commander.
  • Released as a Special Forces Second Lieutenant, having earned the green beret.

What the job actually was

Same discipline, different terrain: stand-ups instead of formations, on-call instead of watch.

Early education

Early education

Model High School of Ionidios, Piraeus

2015 – 2017 · GPA 19.9 / 20

  • Ranked 1st in the entrance exam to the oldest school in Piraeus, founded in 1847, and one of the four public Model schools in Greece.
  • Excellence award every year, and the Piraeus prize for the top graduating grade of 2017.
  • 2nd among about 1,650 entrants in the Panhellenic Biology Competition (2016); awards in Mathematics and Programming; captain of the school’s EUSO science team.
  • Summer School of the University of Piraeus; self-taught C++ from the age of sixteen.

Model Junior High School of Evangeliki, Nea Smyrni

2011 – 2015

  • Ranked 1st in the entrance exam to one of only four public Model schools in Greece.
  • First of the class every year, with the prize of excellence; class president and representative of the school.
  • After-school programming in Pascal, astronomy and robotics; captain of the chess team.
  • Placings in mathematics, programming and literature contests.

Elementary school

Chess and basketball captain

  • 1st place in the city chess tournament; 3rd in the local basketball tournament.

Volunteering and teaching

Running a youth foundation

Director · Christian Youth Foundation "Pantokrator" · Paleo Faliro

February 2021 – September 2022

  • Appointed by the foundation’s council after years as a volunteer, while finishing the degree. The Vice-President approached him directly to fill the vacancy.
  • Renovated, upgraded and modernised the building infrastructure and the foundation’s day-to-day operations.
  • Supervised and taught the children in the foundation’s programmes.
  • Coordinated staff and volunteers, and managed the facilities themselves.
  • Organised athletic, theatrical, cultural and ecological events, field trips and youth activities.
  • Led charitable initiatives: tree planting, donation drives and outreach to vulnerable groups.
  • Built the foundation’s presence on social media and YouTube, and ran live streaming through the COVID-19 lockdowns.
  • Oversaw financial operations and pursued alternative funding through grants and partnerships.
  • Kept the board and the municipal authorities in the loop.
  • People management
  • Facility management
  • Event management
  • Financial oversight

Still going

References

Recommendations

Prof. Panagiotis Tsanakas · Dean, School of Electrical & Computer Engineering, NTUA

Thesis supervisor and course lecturer · 29 November 2023 · translated from Greek

Christos (Kitsos) Orfanopoulos was my student in the following undergraduate courses: Operating Systems, and Software Service Technologies. He was a diligent student with a strong interest in the subjects, as his performance in the assignments and examinations of those courses shows. I also had the opportunity to supervise his diploma thesis, on "Compliance analysis of movement exercises using machine learning techniques". That thesis was marked by scientific soundness and technological originality, and was deservedly graded with distinction.

At the same time, Kitsos was active within the Polytechnic, helping younger students through their first academic steps. He contributed as an assistant in the first-year programming labs, answered their questions and shared his notes online. He also wrote a many-page "survival guide" setting down useful advice and observations for every compulsory course in the School.

It is also worth noting that he took a particular interest in confronting a chronic affliction which unfortunately prevails in the Greek university, caused by extreme minorities who created dysfunction and obstructed the normal democratic processes. He led a movement of "Independent Students" with the aim of establishing a system of electronic voting, and met considerable hostility from groups with no connection to the student community. In that context he represented his fellow students with great responsibility in the faculty assemblies, listened to the requests of all sides, and kept everyone continuously informed.

As a character he stands out for his organisation, his courage and his persistence. He is sincere, cooperative and good-humoured. Judging by his academic course, I am certain that he will excel in his professional career as an electrical and computer engineer.

Lt Col Georgios Mitsidis · Commander, 575 Marine Battalion

Commanding officer during the reserve posting · Athens, 24 June 2024

Christos V. Orfanopoulos reported to the Unit as an Officer Designate on February 11, 2023 and was released as a Special Forces Second Lieutenant on November 22, 2023 after completing his military service in the Hellenic Armed Forces. During that period, he was assigned as a Platoon Leader and Weapons Officer for a Marine Company.

While active, he demonstrated exemplary behavior to everyone, accomplished his tasks successfully without the need of supervision and participated with enthusiasm in every activity of the Unit. He was distinguished for his team spirit, his critical thinking, as well as his attention to formality and detail.

Moreover, he demonstrated interest in proposing ideas and implementing best practices for the improvement of the functions of the Unit, and took initiatives for that purpose, following the Command’s guidelines.

Undoubtedly, Christos V. Orfanopoulos possesses high professional, leadership and ethical qualifications. I am proud that he has been an Officer in my Unit; he honored the green beret and his tenet, and with the utmost confidence I recommend him as a valuable and trusted partner in every occupational field he will choose.

Kyriakos Oikonomou · Justice of the Hellenic Supreme Court (Areios Pagos), retired

Vice-President of the Christian Youth Foundation "Pantokrator" since 2020 · Paleo Faliro, 22 November 2023 · translated from Greek

Christos (Kitsos) Orfanopoulos has for a number of years been a volunteer at the Christian Youth Foundation "Pantokrator" of Paleo Faliro, of which I happen to be Vice-President since 2020. During 2021 and 2022 he served as Director of the Foundation, a post he filled in exemplary fashion, leaving behind him significant work and a valuable legacy for those who followed, through the steps he took towards the renovation, upgrading and modernisation of the building infrastructure and of the Foundation’s operations in general.

Specifically, when a vacancy arose in the Foundation’s Directorship in 2021, I turned to young Christos, then a student at the National Technical University of Athens, and proposed that he take on the Director’s post, because we considered that his bearing, the traits of his character, the particular quality of his personality, his abilities and above all his warm love for the Foundation made him right for the role. Indeed, when after a year and a half he had to end his work with us, because he had completed his studies and had to fulfil his military obligations, his overall contribution had far exceeded our expectations. The field of his activities was broad, running from the maintenance and management of the premises through to the organisation of events, making the most of the volunteers, and the management of digital media.

He was highly organised, focused on his duties, hard-working and conscientious, and kept us regularly informed of everything he did. He continually took on new initiatives and always tried to address the cause of whatever problems he found in the Foundation’s running. He kept good relations with the children of the Foundation, whom he had been called to educate and look after during their time on the premises. He talked with them and took an interest in their problems, and moreover guided them with useful advice, and had succeeded in being trusted and heeded by them. By character he was approachable, welcoming, friendly and particularly likeable.

Christos is distinguished by his sincerity, his discipline and his dedication to every task he undertakes to see through. He is modest, serious, dignified, and a person who inspires trust. I consider Christos Orfanopoulos to be a worthy scientist and a capable professional, and I judge that he will prove useful, effective and indispensable, bringing significant benefit to any business working environment.

Stelios Kandylakis · Senior Product Manager, Financial Data Intelligence

Classmate and collaborator at ECE NTUA · November 2025

I highly recommend Christos, with whom I collaborated on numerous university projects and coding competitions while we were both studying at ECE NTUA. He has very strong coding skills, a solution-oriented mindset, and is a person of integrity. Christos always showed strong leadership, making him a valuable asset to any team or organization.

Personal

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Senior Software Engineer and Technical Lead based in Athens, Greece. I build cloud-native healthcare products end to end, Java and Spring Boot on the backend, React on the front, AWS underneath, and I lead the teams that ship them into hospitals.

Home
Athens, Greece
Nationality
Greek
Field
Full stack / cloud / health tech
Currently
Senior Software Engineer

Languages

Off the clock

Hobbies

  • Running
  • Cycling
  • Theater
  • DIY & handiwork
  • Chess
  • Hiking
  • Camping

Leading volunteer at the Christian Youth Foundation "Pantokrator" in Paleo Faliro, and a blood donor since 2017.

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