RALEIGH –Pendo, the fast-growing software and services firm now worth more than $1 billion and thus a “unicorn” in the world of emerging startups, shows no signs of slowing down. The privately held firm announced Thursday it is opening offices to drive more business in the Asia-Pacific. New outposts are set for Japan and Australia. And that means more hiring. Pendo, which already has 450 employees in Raleigh and current offices elsewhere such as London, San Francisco and New York, says it hire “more than 20 people” for the additional operations. Pendo has reported several consecutive quarters of growth that has exceeded its projections. The firm says it now has more than 1,600 customers, including large retailers, banks, educational institutions and hospitality firms.