The team, which is based in London and Glasgow, has now been expanded to include 8 people.
In London, Andrew Moss and Gerard Charnley have joined as product strategy executives from Mortgage Express and Lehman Brothers respectively. In Glasgow, Brian Howat joins as market intelligence manager from the Daily Herald.
Gillian Walker has been promoted to product management executive and Paul Black has taken on a new role of product innovation executive. Lisa O'Neil has recently joined the team as product assistant in Glasgow.
The overall team is led by Georgina Maun, head of product development, who reports to Ian Whittaker, marketing director.
Commenting on the new structure, Georgina Maun, head of product development, said: "The specialist market has been evolving at a rapid pace in recent months and product has been at the forefront of developments. In light of this and the growth Mortgages plc has experienced, we've needed to restructure and expand the team. We've now got a really strong group with a diverse range of skills. I'd like to welcome Andrew, Gerard, Brian and Lisa and congratulate Gillian on her promotion."