Things I designed and builtThingsIdesigned
andbuilt

Notevex

Business platform · multi-tenant SaaS

Clients, projects, people and reporting in one system.

A multi-tenant SaaS that brings CRM and sales, operations, a developer API and a client portal together, on the web and on native mobile.

• Paying customers run their daily operations on it. Every one of them came by word of mouth; there has been no marketing spend.
• Security built for business use: JWT with certificate validation, 2FA, full tenant isolation, per-user CRUD permissions and a complete audit trail.
• Live updates through SignalR, and a REST API with webhooks signed using HMAC-SHA256.

• .NET 10
• MassTransit/RabbitMQ
• Redis
• PostgreSQL
• Angular
• React
• Flutter
• Firebase
• about 10 services on Kubernetes with auto-scaling and full observability

notevex.com

app.notevex.com

TableButler

Ordering and payments for venues

Guests order and pay from the table.

Ordering, payments, loyalty and reservations for restaurants, cafés and bars. Guests scan the code on the table, read the menu in their own language, order, pay and split the bill, and every order reaches the staff on their phones.

• Live in production. It runs next to the venue's existing till instead of replacing it, so if TableButler ever goes down the venue keeps serving.
• Five apps for the people who use it: the guest web app, a staff app, a backoffice for owners and managers, kitchen and bar screens, and a console for running the platform.
• Each venue's data sits in its own database. Orders, waiter calls and payments reach the right phone in real time, with bill splitting, tips and refunds built in.

• .NET 10
• MassTransit/RabbitMQ
• Redis
• PostgreSQL
• SignalR
• React
• four API hosts and a worker on Kubernetes

thetablebutler.com

Synolon

Business platform for Cyprus and Greece

From the Greek σύνολον: the whole.

My largest project so far: sales, projects, invoicing, accounting, payroll and compliance in one platform, all working from the same records, with the rules of Cyprus and Greece built in, from VAT to payroll to myDATA.

• It brings together what Notevex and TableButler taught me, plus the accounting, payroll and compliance products I built separately (Accountvex, Payrovex and Complyvex).
• Every module comes with a setup checklist, guided tours and in-app help, so a team learns it by using it.
• One database per customer, and each business domain kept strictly apart so it can grow without touching the others. Greek, English and Russian from day one.

• .NET 10
• MassTransit/RabbitMQ
• Valkey
• PostgreSQL
• SignalR
• OpenIddict
• YARP
• .NET Aspire

Alterwise

Planning personas for operations teams

Your best people, multiplied.

In every company someone just knows which order goes first and what will go wrong next. Alterwise connects to the data a company already has and builds personas that plan the way its most experienced people do.

• A persona proposes the plan, explains why, and learns from every change the team makes to it.
• Optimisation solvers work out the plan. The language model sets things up, translates and explains, and a person confirms anything that changes how a persona behaves.
• Reads ERP data, APIs, spreadsheets and GPS feeds read-only, and works in its own web app and inside Claude and ChatGPT over MCP.

• .NET 10
• OR-Tools
• PostgreSQL with PostGIS and pgvector
• MassTransit/RabbitMQ
• Valkey
• MCP