Hiring in-house buys you long-term retention of knowledge. The engineers learn your domain in a way no external team will match, and this context remains inside the company. The cost is slow hiring and fixed overhead: filling a senior role takes months, onboarding adds more time and materials vs fixed price, and the payroll continues whether the roadmap is full or empty.

Full outsourcing means someone else is accountable for shipping: they staff the roles, the partner manages the day-to-day work, and they absorb the staffing risk. This fits well when the outcome can be described and your side has an available product owner. It breaks down when the requirements change weekly, because the provider is not able to invent your business process automation company rules.

Hiring individual contractors falls in the middle: you bring in developers while keeping responsibility for delivery on your side. It is fast — the right specialist can start almost immediately — and it scales down as easily as it scales up. The trade-off remains that your engineering managers have to have the capacity to direct the work. Without that, you end up paying hourly for uncoordinated work.

In the real world, the models mix. One durable pattern puts the critical decisions and the core system inside the company, while an external team covers peaks, well-defined modules or platform work. The line is easy to state: keep the parts that are hard to re-learn, and contract out anything a competent team can specify and deliver.

Three simple questions resolve most of these debates. To begin with: is this build vs buy software the product itself, or dotnet development outsourcing a supporting tool? Second: for how long does the work continue — months or years? Finally: who will maintain it in two years? Work through them with real answers and the appropriate option is normally clear.