Custom software development firm AltSource is the latest tech company to expand in the popular Central Eastside Industrial District. This fall, the company, which has 135 employees, moved into a new headquarters at 1120 S.E. Madison St. The new space, which the company owns and renovated, has room for up to 350 people. So far, the company has 115 of its employees in the new office. At 46,000 square feet, the new office is much bigger than the previous 11,000 square foot space the company had before,...