The software architecture, functionality, integrations, and many other variables significantly determine which technology stack you should choose for your financial software development. https://ikonicdev.com/ However, as a general rule, the following technologies are often used as the foundation for fintech solutions:

Software development kits (SDKs) such as AppleXCode, iOS, and Android SDKs, and Android Studio; programming languages such as Python, Django, Swift, Kotlin, JavaScript,.net, C#, Java, Flutter, and Xamarin; cloud-based technologies such as Google Cloud, AWS, Azure, Heroku, PaaS, and MBaaS;

databases such as PostgreSQL, MySQL, MongoDB

It is important to keep these application programming interfaces (APIs) in mind to link all of the functions you have in mind: Plaid and Yodlee are used for banks and other financial institutions. And Stripe is used for payment gateways.

Experian is used for credit solutions; Slack, Dialogflow, and Wit.ai are used for social media, and chatbots are built using AI-based solutions, ML, and NLP.