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Remote Research Scientist (ML) Jobs in Portugal 2026

6 remote jobs open to candidates in Portugal in Research Scientist (ML). Updated daily.

Member of Technical Staff - Post-Training (Reinforcement Learning & Generalization)

Cohere
Research Scientist (ML) Full-time ↘ +3 regions
AI Training LLMs +12 Infrastructure Microsoft Teams Reinforcement Learning RLHF Research Dynamics Engineering JAX PyTorch Communication Alignment Culture
  • Europe, United States, Canada (CA: ON · US: NY)
  • CA$295k – CA$535k/yr
  • Oct 14, 2026

Who are we? Cohere is the leading security-first enterprise AI company. We build cutting-edge foundation AI models and end-to-end products that are designed to solve real-world business problems.

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AI Research Engineer (Pre-training - LLM & Multi-Modal) - 100% Remote Worldwide

Tether
Research Scientist (ML) Full-time ↘ +35 regions
AI Research Finance +12 Infrastructure Communications Education Fintech English Communication Architecture Optimization Algorithms Curation Alignment LLMs
  • United Kingdom, Argentina, Colombia +32BrazilUruguayIndiaBangladeshPakistanJapanVietnamTaiwanThailandSwitzerlandSpainUnited Arab EmiratesBulgariaCzech RepublicSerbiaDenmarkEstoniaGreeceGeorgiaHungaryIrelandMaltaNorwayNetherlandsPolandPortugalRomaniaSwedenBelgiumIsraelTurkeyCyprus
  • Aug 10, 2026

At Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains.

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AI Research Engineer (Model Compression & Quantization) - 100% Remote Worldwide

Tether
Research Scientist (ML) Full-time ↘ +35 regions
AI Research Quantization +12 Finance Infrastructure Communications Education Fintech English Communication Algorithms Engineering Simulation Monitoring Scalability
  • United Kingdom, Argentina, Colombia +32BrazilUruguayIndiaBangladeshPakistanJapanVietnamTaiwanThailandSwitzerlandSpainUnited Arab EmiratesBulgariaCzech RepublicSerbiaDenmarkEstoniaGreeceGeorgiaHungaryIrelandMaltaNorwayNetherlandsPolandPortugalRomaniaSwedenBelgiumIsraelTurkeyCyprus
  • May 19, 2026

At Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains.

View Details Apply Now

AI Research Engineer (Multi-Modal & Vision) - 100% Remote Worldwide

Tether
Research Scientist (ML) Full-time ↘ +35 regions
AI Research Finance +12 Infrastructure Communications Education Fintech English Communication Training Curation Optimization Engineering Fine-Tuning Distillation
  • United Kingdom, Argentina, Colombia +32BrazilUruguayIndiaBangladeshPakistanJapanVietnamTaiwanThailandSwitzerlandSpainUnited Arab EmiratesBulgariaCzech RepublicSerbiaDenmarkEstoniaGreeceGeorgiaHungaryIrelandMaltaNorwayNetherlandsPolandPortugalRomaniaSwedenBelgiumIsraelTurkeyCyprus
  • May 19, 2026

At Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains.

View Details Apply Now

AI Research Engineer (Multi-Modal Reinforcement Learning) - 100% Remote Worldwide

Tether
Research Scientist (ML) Full-time ↘ +35 regions
AI Research Finance +12 Infrastructure Communications Education Fintech English Communication Decision Making Algorithms Reasoning Training Reinforcement Learning Modeling
  • United Kingdom, Argentina, Colombia +32BrazilUruguayIndiaBangladeshPakistanJapanVietnamTaiwanThailandSwitzerlandSpainUnited Arab EmiratesBulgariaCzech RepublicSerbiaDenmarkEstoniaGreeceGeorgiaHungaryIrelandMaltaNorwayNetherlandsPolandPortugalRomaniaSwedenBelgiumIsraelTurkeyCyprus
  • May 19, 2026

At Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains.

View Details Apply Now

AI Research Engineer (Agentic Post-training) - 100% Remote Worldwide

Tether
Research Scientist (ML) Full-time ↘ +35 regions
AI Research Finance +12 Infrastructure Communications Education Fintech English Communication Testing Algorithms Training Reasoning Engineering Calibration
  • United Kingdom, Argentina, Colombia +32BrazilUruguayIndiaBangladeshPakistanJapanVietnamTaiwanThailandSwitzerlandSpainUnited Arab EmiratesBulgariaCzech RepublicSerbiaDenmarkEstoniaGreeceGeorgiaHungaryIrelandMaltaNorwayNetherlandsPolandPortugalRomaniaSwedenBelgiumIsraelTurkeyCyprus
  • May 19, 2026

At Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains.

View Details Apply Now
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