Discovery Call
We learn about your project goals and requirements.
We Build Digital Experiences
Mobile App, Web & Game Development Studio - Athens, Greece
We craft mobile apps, web platforms, and games with precision from Greece. We are one of the few companies in the country developing with Unreal Engine 5.
Trusted By
Our Clients
How We Work
How We Work
A clear path from first conversation to launch, with no guesswork in the middle.
Proposal & Timeline
You receive a clear scope, cost estimate, and delivery plan.
Design & Development
We build with regular updates and feedback rounds.
Launch & Support
We handle deployment and stay available after launch.
Every month without your product is a month your competitors are ahead. The best time to start was six months ago. The second best time is now.
Portfolio
Our Work
Selected projects across mobile, web, and game development.
Triaena Forms
Custom conference registration and form management platform powering all Triaena events. Administrators use a visual form builder to construct multi-page registration forms with 13 field types, conditional visibility rules, branded themes, and pricing fields. Attendees register, pay online, and submit scientific abstracts within a single authenticated session.
Next.jsFirebase
Triaena Members
Private room reservation portal for Triaena Business Center members. Authenticated users browse available meeting rooms, view real-time availability with occupant visibility, make and cancel reservations, and track their booking history. Administrators manage the full user roster and oversee all reservations across all rooms.
Next.jsFirebase
Lyra Project
Third-person shooter for mobile and desktop. Features diverse maps, character selection, an in-game economy, and custom mobile touch controls designed from the ground up.
Unreal Engine 5C++
Social Meme
Feature-rich meme-sharing social platform for iOS and Android. Supports every meme format with interaction tracking, a badge achievement system, and monthly community leaderboards.
FlutterFirebase
Race Fantasy
Action-packed racing game for Android with three unique levels, a tiered progression system, and unlockable characters. Available on Google Play.
Unreal Engine 5C++
iGrow Goals
Feature-complete iOS and Android app for SMART goal achievement. Users set structured goals with steps across multiple life categories, link recurring habits with streak gamification, invite accountability partners, celebrate milestone badges, explore goal templates, and track progress through visual dashboards.
FlutterFirebase
iGrow MHFA
Mental Health First Aid reference guide for iOS and Android. Provides structured, evidence-informed guidance on recognizing and responding to five mental health conditions, with dedicated conversation guides, self-care modules, and a curated crisis resource directory.
FlutterFirebase
BIMAS-3
Multi-rater behavioral and emotional assessment platform for school mental health teams, with role-based portals and reporting workflows.
Angular.NETAzure
HIPAAFERPANIST CSF 2.0
BASI Schools
School-focused BASI assessment platform covering assessment delivery, monitoring, roster management, and norms/question-bank operations.
Angular.NETAzure
HIPAAFERPANIST CSF 2.0
.png?alt=media&token=79e3d0b3-f6eb-4cff-a935-bd174c2b1756)
BASI Org
Organization-level BASI platform for clinics and assessment centers with client rosters and organization-scoped permissions.
Angular.NETAzure
HIPAAFERPANIST CSF 2.0
CAWS
Children and Adolescent Wellness Scale platform supporting multi-rater wellness assessment and longitudinal school workflows.
Angular.NETAzure
HIPAAFERPANIST CSF 2.0
K-SEP
Early childhood social-emotional proficiency assessment platform with dedicated rater and parent workflows.
Angular.NETAzure
HIPAAFERPANIST CSF 2.0
JWS
Organization-level multi-rater assessment platform for youth-serving programs outside traditional school settings.
Angular.NETAzure
HIPAAFERPANIST CSF 2.0
Dyslexia Screener
School-based dyslexia screening platform with multi-role workflows and monitoring support for at-risk learners.
Angular.NETAzure
HIPAAFERPANIST CSF 2.0
SEL Platform
SEL delivery and management platform for schools, including lessons, cohorts, forms, and parent communication flows.
Angular.NETAzure
HIPAAFERPANIST CSF 2.0
Mathesis AI
Embeddable AI chatbot platform for ALS products with admin configuration, tenant controls, and secure embedded delivery.
Angular.NETAzure
ECF25
Official website for ECF25 — the 25th European Conference on Fracture — held in Athens 2026. Serves researchers, engineers, and academics through the complete conference lifecycle: scientific programme, thematic symposia, plenary lectures, abstract submission, registration with fee tables, awards, committees, sponsorship packages, and travel info. Content is managed through a live CMS so organisers update text and images without code deploys.
Next.jsFirebase
MWOConf
Official website for the international symposium on Wine and Olive Oil in the Mediterranean, held at the International Olympic Academy in Ancient Olympia (June 2026). Serves researchers, producers, and agri-food professionals in three languages with abstract submission, tiered registration, programme, awards, committees, sponsorship packages, and visa guidance.
Next.jsFirebase
Services
What We Do
We deliver end-to-end development across three core disciplines.
Mobile Development
We build native and cross-platform apps for iOS and Android. From concept to App Store, using Flutter, SwiftUI, and Java.
Web Development
We create modern web applications and platforms. Full-stack solutions with React, Angular, .NET, and cloud infrastructure on Azure.
Game Development
We develop immersive games for mobile and desktop with Unreal Engine 5. We are one of the rare companies in Greece with UE5 expertise.
Tech Stack
Our Tech Stack
Unreal Engine 5
Flutter
React
.NET
Angular
MySql
FirebaseAbout Us
About SepeTech
We are SepeTech L.P., a Greek software house founded by George Sepetadelis. We specialize in mobile applications, web platforms, and game development.
With over 7 years of hands-on development experience since 2019, we bring a rare combination of skills to every project: from Flutter cross-platform apps to Unreal Engine 5 games -- a discipline almost unheard of in Greece.
Our philosophy is simple: we deliver high-quality, performant software that solves real problems. Whether it is a behavioral assessment platform serving thousands of educators, or an action-packed mobile game, we approach every project with the same rigor and attention to detail.
Our Values
Precision
Every line of code is intentional. We optimize for performance, security, and maintainability from day one.
Versatility
From mobile to web to gaming, our cross-domain expertise means we pick the right tool for every challenge.
Commitment
We treat every project as our own. We meet deadlines, communicate clearly, and never compromise on quality.
FAQ
Questions clients usually ask first
Short answers to the practical concerns that come up before a project starts.
Do you work only with Greek companies?
No. We work with teams in Greece and internationally, with delivery handled in English or Greek.
Can you take over an existing codebase?
Yes. We can audit, stabilize, and extend existing mobile, web, or Unreal Engine projects.
Do you support launch and maintenance?
Yes. We support deployment, release preparation, fixes, and planned follow-up improvements.
What is the best way to start?
Send a short brief with your goal, timeline, and budget range. We will reply with the next concrete step.
Get In Touch
Start a Conversation
Have a project in mind? Let us discuss how we can help bring it to life.