Software studio · Athens

Fortress Software Solutions

We provide software solutions for businesses and their customers.

Client work

Businesses we build for. Each client owns its source code.

Balance Lab, Nutrition & Wellness

BalanceLab

Nutrition & wellness · Kifissia, Athens

BalanceLab is a nutrition and wellness practice in Kifissia. We built and maintain three products for them.

  • WebsiteThe practice's public site.balancelab.gr
  • Client portalClients follow their meal plans and progress from their phones.portal.balancelab.gr
  • Staff appDietitians manage clients, appointments and meal plans, on the web and the practice's tablets.

Elena's Houses

Hospitality · Athens

Short-stay apartments in Athens. We built their website.

elenas-houses.com

SCS Security

Security systems · Athens

Sound Control Security installs alarms and CCTV in Athens. We built their website.

scs-security.gr

Battle Arts Academy Coming soon

Martial arts · Kifissia

A kick-boxing academy in Kifissia.

Our products

Software we build and publish ourselves.

Borealis Connect Open source

D&D 5e character builder · web, Windows, Linux, Android, iPhone (sideload)

A multi-user server edition of the Borealis character builder by TeamBorealis, for groups who play together.

  • Rust
  • Axum
  • Tokio
  • sqlx
  • PostgreSQL / SQLite
  • React
  • TypeScript
  • Tauri 2
  • MCP
  • Docker
Source and downloads

ProveYourLag In development

Lag reports for gamers · Windows, Linux, Docker

Records network lag while you play and produces a report you can send to your internet provider.

  • Python
  • C# / .NET 10
  • Windows ETW
  • SQLite
  • JavaScript
  • NSIS
  • Docker

Open-source contributions

Fixes we have contributed to other projects, and our own public code.

Borealis Upstream

TeamBorealis · D&D 5e character builder

Four fixes merged into the original character builder.

  • Rust
  • TypeScript
TeamBorealis/borealis

Xpengtk Upstream

Home Assistant integration for XPENG cars

Six pull requests merged, including climate, window and seat controls and a vehicle card for Home Assistant dashboards.

  • Python
  • Home Assistant
  • MQTT
  • JavaScript
  • pytest
xpengtoolkit/xpengtoolkit

What we work with

Languages and tools we use.

Back end

  • Java 25
  • Spring Boot 4
  • Spring Security, OAuth2, JWT
  • JPA & Flyway
  • Rust: Axum, Tokio, sqlx
  • Python
  • REST & OpenAPI
  • WebSocket

Front end

  • TypeScript
  • React 19
  • Vite
  • TanStack Query
  • PWA & service workers
  • i18n (Greek & English)

Apps

  • Tauri 2: desktop, Android, iOS
  • Capacitor: Android
  • C# / .NET 10 Windows services
  • Android (Java, Kotlin)
  • Installers & auto-update (NSIS, MSI, AppImage)

Security

  • Argon2 password hashing
  • AES-256-GCM encrypted secrets
  • OAuth2 & JWT
  • Content Security Policy

Data

  • PostgreSQL
  • SQLite
  • Schema migrations
  • PDF & CSV reporting

Quality

  • JUnit & Testcontainers
  • ArchUnit
  • Error Prone & NullAway
  • Vitest
  • Playwright
  • pytest

Delivery & hosting

  • Docker & Compose
  • GitHub Actions
  • Self-hosted runners
  • GHCR
  • nginx
  • Proxmox & LXC
  • Cloudflare

Integrations

  • Google Calendar
  • Email delivery
  • Home Assistant & MQTT
  • Model Context Protocol
  • LLM providers

About

Fortress Software Solutions is the studio of Evangelos Panos, a software engineer in Athens.

Contact

New projects, partnerships or questions about our apps.

General enquiries

Projects, quotes and partnerships.

[email protected]

Support

Help with Borealis Connect or any of our apps.

[email protected]

GitHub

Source code, releases and issues.

github.com/fortress-soft