The firm, founded by Jude Cook and Andrew Pickett, said its team now numbers 24 and it operates investment platforms for companies across Europe.
Chief executive Cook said: “It’s an exciting time for ShareIn. With strong demand for our products and services we’ve been able to take on new staff and build a great team in Edinburgh.
“Three short years ago, we started with a single shared desk and now we’re sitting in the largest office at CodeBase.”
Chief technology officer Pickett said: “Our technology and compliance offering is a compelling option for many in the UK and increasingly overseas. We’ve found a product market fit and are growing our capability to meet the increase in demand.”