Mobile Apps
Native and cross-platform apps for iOS and Android, from concept to App Store with Flutter and SwiftUI. Structured goals, streaks, dashboards: we have shipped them all.
Greek software house, Athens
Scalable software, built with precision.
Custom software for startups and enterprises, from fast MVPs to secure, compliance-grade platforms at scale. 15+ shipped products, platforms serving 1M+ users, built with precision at every stage.
Trusted by
What we build
End-to-end / Design / Ship / SupportWeb Platforms
Full-stack platforms serving million+ users: assessment systems under HIPAA and FERPA, event management, booking portals. React, Angular, .NET, cloud-native.
HIPAA & FERPA developmentGames & Real-Time 3D
Real-time 3D in Unreal Engine 5 and C++: games for mobile and desktop, plus visualisation, simulation and interactive experiences. Custom touch controls, in-game economies, tiered progression. Shipped on Google Play.
Unreal Engine 5 developmentSelected work
15 shipped projects / all shown
BIMAS-3
The Behavior Intervention Monitoring Assessment System (BIMAS-2) measures behavioral functioning and social-emotional skills in children and adolescents from pre-K to age 18, for universal screening and progress monitoring.
Dyslexia Screener
School dyslexia screening platform with multi-role workflows and follow-up monitoring for at-risk learners.
BASI Org
BASI Org
The Basic Achievement Skills Inventory-2 is a series of norm-referenced and formative achievement assessments. The Comprehensive version gives a detailed evaluation of academic skills for grades 3-12.
Triaena Forms
Event platform with a visual form builder, conditional logic, online payments and scientific-abstract submission for conferences.
Triaena Members
Meeting-room reservation portal with real-time availability, booking history and full admin oversight.
iGrow Goals
SMART-goal iOS & Android app: habit streaks, accountability partners, milestone badges and visual progress dashboards.
Social Meme
Meme-sharing social platform for iOS and Android, with every meme format, badge achievements and monthly community leaderboards.
SEL Platform
Social-emotional learning delivery and management for schools: lessons, cohorts, forms and parent communication flows.
iGrow MHFA
Mental Health First Aid reference app for iOS and Android: five condition modules, conversation guides and a crisis-resource directory.
BASI Schools
The BASI-2 Survey assesses academic skills quickly and reliably, evaluating verbal and math competencies for students ages 8 to 18 and adults up to 80, in about 25 minutes per domain.
CAWS
CAWS
The Children and Adolescent Wellness Scale assesses social-emotional competencies across 10 psychological domains. Schools run universal screening windows rated by teachers, parents and students through the web application.
K-SEP
K-SEP
Early-childhood social-emotional proficiency assessment with dedicated rater and parent workflows.
JWS
The Journey to Wellness Scale (JWS) is an 80-item social-emotional learning (SEL) skills inventory that assesses competencies across 10 psychological domains.
ECF25
Official website for the 25th European Conference on Fracture, held in Greece, with a live CMS so the client updates content without deploys.
MWOConf
Official website for an international Wine & Olive Oil symposium at the International Olympic Academy in Ancient Olympia, CMS-managed.
Building something like these?
How we work
Discovery
A short call on goals, constraints and budget. You talk to the engineer, not a salesperson.
Scope
A written proposal: exact scope, cost, delivery plan. No vague estimates.
Build
Weekly demos and feedback rounds. Performance, security and maintainability from day one.
Launch +
Deployment, release prep, fixes and planned improvements. We stay after launch.
About SepeTech L.P.
Every line of code is intentional.
Founded by George Sepetadelis in Athens, SepeTech builds software the way engineers measure twice: assessment platforms serving thousands of educators, event systems processing real payments, and games, with the same rigor across all three.
- Precision
- Optimized for performance, security and maintainability, from the first commit.
- Versatility
- Mobile, web and gaming under one roof, the right tool for every challenge.
- Commitment
- Deadlines met, communication clear, quality never compromised.
Questions
Frequently asked
How much does a custom app or website cost?
It depends on scope, but you always get a fixed, written quote after a short discovery call, never a vague estimate. We scope the build to your budget and tell you the number up front.
How long does a project take?
Most projects ship in a few weeks to a few months, depending on scope. You get a written delivery plan before we start and weekly demos while we build.
Who owns the code and the IP?
You do. You get full ownership of the source code and intellectual property on delivery, with no lock-in.
Can you take over an existing or half-finished project?
Yes. We regularly pick up codebases from other teams, audit what is there, and continue from it, whether that means fixing, finishing or rebuilding. You get an honest assessment before any work starts.
Do you build games and real-time 3D in Unreal Engine 5?
Yes. We are one of the very few teams in Greece working commercially in Unreal Engine 5 and C++. We have shipped games on Google Play, and the same real-time 3D stack covers visualisation, simulation and interactive experiences.
Do you offer support and maintenance after launch?
Yes. Deployment, release prep, fixes and planned improvements are part of how we work. We stay on after handover on a plan that fits the product, rather than disappearing.