BUSINESS SOFTWARE ON .NET

Build your next product. Improve the systems behind your business.

I build and improve business software on .NET, hands on, from architecture to handover. Two ways in: a scoped web, iOS and Android MVP delivered in 14 business days, or custom development for new and existing business systems, with scope and timeline set per project. Either way you own the code from the first commit.

MVP in 14 business days Development & modernization

No sales reps. Direct talk with the architect who writes the code.

// engagement models

Two ways to work together.

Both start with the same 15-minute call. You leave it knowing which one fits and what happens next.

01 / fixed scope, fixed term

MVP Development

For funded founders and enterprise spin-offs who need a real product in front of users and investors, with a functional scope that can be fixed before day one.

  • Web, iOS and Android from one C#/.NET codebase
  • Fixed functional scope, agreed and signed before day one
  • Auth, PostgreSQL, three CI/CD pipelines, tests and monitoring included
  • One AI feature, agreed in the scope
  • Full source code in your repository

14 business days, guaranteed. The clock starts when the scope is signed by both sides and the deposit is received. Store approval is not part of the term.

See the MVP offer
02 / scoped per project

Custom Development & Modernization

For businesses that need a new system, an extension of an existing product, or a modernization of the system they run today.

  • New business applications and modules in .NET
  • Extensions of existing products, integrations with your databases, services and business systems
  • Modernization from any technology to .NET, after an assessment of the system
  • Web, Android and iOS, and practical AI features where the project needs them
  • Architecture, implementation, testing, deployment and knowledge handover

Scope, phases, timeline and pricing per project. The 14-day MVP term does not apply here; a new product can be either, depending on what it has to do on day one.

Explore development & modernization

// from the lab

The architect who scopes your project writes the code and the essays.

No ghostwriters and no outsourced juniors.

Demonstration project, built in public: DotnetLeet.Trade, the back office of a hardware reseller with a local language model inside. Source on GitHub. Not a client project.

Oct 23, 2026

The Optimistic Concurrency EF Core Gives You for One Column

Part 2 of the locking series: the optimistic concurrency EF Core gives you for a rowversion column, measured under 50 concurrent transfers. How the token becomes a WHERE predicate, how to handle DbUpdateConcurrencyException without a stale change tracker, which retry policy does not stampede, and where a hot row breaks it.

EF Core rowversion concurrency token Read the essay Oct 19, 2026

Multi-Tenancy Is an Identity Problem

Silo, pooled compute with siloed data, or one partitioned database: the layout sets the isolation boundaries. The leak is always the same mistake, a request that reached the data layer without knowing its tenant. Put the tenant id in the token, resolve it once at the edge, let the data layer apply it to reads and writes, and hand it explicitly to workers and jobs.

SaaS multi-tenancy multi-tenant architecture Read the essay Oct 2, 2026

Software Architecture Is All About Trade-Offs

There is no best architecture. Every decision gives you something and takes something away. The price starts on day one, the benefit only when the need shows up. Why moving code to another server does not fix coupling.

software architecture trade-offs microservices Read the essay
Jasmin Sabanovic
Jasmin Sabanovic Hands-on .NET engineer and architect for business products. Microsoft Certified: Azure Solutions Architect Expert.
All essays About the architect

// scoping intake

Tell me what you need.

A product to launch, or a system to build, extend or modernize. Send a few sentences and you get a straight answer on which offer fits and what happens next.

  1. 01
    Send a few sentences

    What you need, who it is for, and what exists today.

  2. 02
    15-minute architecture call

    Which offer fits, the risks I see, and the first step.

  3. 03
    Scope and a start date

    Fixed for the MVP; agreed per project for custom work.

No sales reps. Direct talk with the lead architect.

new-project.brief
What do you need?

Your brief stays private. It is only used to prepare the call. Privacy