The following is my personal perception and probably is incomplete.

Universities good at Computer Science (North-South):

• UM aka 'UMinho' in Braga.
• FEUP in Porto.
• FCUP in Porto.
• UA aka 'UAveiro' in Aveiro.
• IST aka 'Técnico' in Lisbon.
• Universidade Nova aka 'Nova' in Lisbon.

Companies with international SeriesA (A-Z):

• Aptoide
• Codacy
• dashdash (I'm a founder)
• Farfetch
• feedzai
• outsystems
• Seedrs
• talkdesk
• Unbabel
• uniplaces
• Veniam

Other interesting companies (A-Z):

• AirCourts: sports booking app that won the PT market (I'm an angel investor)
• Blip: agency turned tech center for betting company Paddy Power Betfair
• sketchapp: co-founded by Emanuel Sá
• jscrambler: jscrambler
• LSTS: Lab with an open-source end-to-end toolchain for Autonomous Systems
• Mindera: agency spawn out of Blip
• Prozis: very successful online sports nutrition company (Private)

Local funds that go deep on technology (A-Z):

• Armilar

International funds that made early bets in PT startups before/ at Series A (A-Z):

• Accel: dashdash (A)
• Advent: Farfetch (A)
• Atomico: uniplaces (A)
• Augmentum: Seedrs (A)
• Cherry: dashdash (Seed)
• Data Collective: feedzai (A)
• DFJ: talkdesk (A)
• EQT: Codacy (A)
• e-ventures: Aptoide (A)
• Index: Farfetch (A)
• Notion: Unbabel (A)
• Octopus: uniplaces (Seed)
• Saphire: feedzai (A)
• Salesforce: talkdesk (A)
• Storm talkdesk (Seed)
• True: Veniam (A)
• Woodford: Seedrs (A)