RemoteLeaf Logo
Log in Sign up

AI Researcher

7 hours, 6 minutes ago
Europe, Asia
Full-time
Senior
AI Research Scientist
Software Development
Hugging Face LLM Machine Learning Python PyTorch Reinforcement Learning
Apply Now
Toptal

Toptal

Toptal is a curated talent marketplace connecting freelance software developers, designers, finance experts, product managers, and project managers with businesses globally. With a focus on top 3% talent in software engineering, design, and finance, To...

Construction & Engineering
5K-10K
Founded 2010
$4M raised
View All Jobs 29

Description

  • Advance research on agentic AI systems trained on real-world interaction signals and multimodal data.
  • Design and experiment with learning paradigms for large-scale models, including RAG, supervised fine-tuning, RLHF, DPO, and GRPO-style methods.
  • Develop multimodal representation learning approaches across text, audio, logs, and structured interaction traces.
  • Improve speech and audio intelligence capabilities, including STT, ASR, and audio-driven learning signals.
  • Research methods for enhancing agent reasoning, planning, tool use, and adaptation in real-world environments.
  • Translate complex behavioral and interaction signals into effective training objectives for large-scale models.
  • Build and refine evaluation methodologies for agent performance in real-world, domain-specific scenarios.
  • Collaborate with engineering and product teams to bring research ideas into production systems.
  • Identify patterns in real-world workflows and convert them into generalizable modeling and representation strategies.
  • Contribute to the long-term research direction of Toptal’s agentic AI systems and multimodal capabilities.

Requirements

  • PhD in Computer Science, Machine Learning, AI, Electrical Engineering, or a related field.
  • 5+ years of experience in applied AI research or ML systems with production impact.
  • Strong background in large-scale machine learning, LLMs, or multimodal AI systems.
  • Hands-on experience with RAG systems.
  • Experience fine-tuning large language models.
  • Experience with reinforcement learning methods such as RLHF, DPO, or GRPO-style approaches.
  • Experience with VLMs.
  • Strong understanding of representation learning, embeddings, and joint embedding spaces.
  • Experience with speech and audio modeling, including STT, ASR, or audio signal processing.
  • Proficiency in Python and modern ML frameworks such as PyTorch and the Hugging Face ecosystem.
  • Experience designing or improving evaluation methodologies for LLMs or agentic systems.
  • Experience with agentic AI systems, including reasoning, planning, or tool-use architectures.
  • Background in multimodal AI systems across text, audio, vision, or structured logs.
  • Experience embedding AI into real-world products such as browsers, IDEs, or enterprise tools.
  • Experience with real-time or streaming AI systems.
  • Open-source contributions or publications in top-tier ML/AI conferences.
  • Strong ability to define research hypotheses from ambiguous, real-world problems.
  • Outstanding written and verbal communication skills in English.
  • All communication and resumes must be in English.
  • This is a remote position.
  • You must be a world-class individual contributor.

Benefits

  • Full-time remote role.
  • Work as part of Toptal’s fully remote global workforce.
  • Join a support structure that encourages innovation, social interaction, and fun.
  • Opportunity to work on proprietary real-world data and frontier agentic AI systems.

Interested in this position?

Apply directly on the company website

Apply Now

Similar Roles

Natera

Senior Machine Learning Scientist, Agentic AI

Natera 1K-5K Pharmaceuticals

Natera is hiring a Senior Machine Learning Scientist to lead agentic AI and multi-modal foundation model work for oncology-focused R&D that turns complex molecular and clinical data into verifiable insights for biomarker and therapeutic discovery.

United States Full-time Senior AI Research Scientist
$160k-$212k
LLM Machine Learning PyTorch React Statistics
5 hours, 51 minutes ago
Archer

Staff Artificial Intelligence Research Engineer (SJ2026KP)

Archer 251-1K Construction & Engineering

Archer is hiring a research-focused machine learning engineer to develop and transition AI systems for autonomy, trajectory prediction, and perception for its all-electric aircraft program.

United States Full-time Lead AI Research Scientist
$238k-$249k
Deep Learning Generative AI Machine Learning Reinforcement Learning
1 day, 12 hours ago
Bluesky

AI Safety Argumentation Platform Research Engineer

Bluesky Internet Software & Services

CARMA is hiring a remote AI Safety Argumentation Platform Research Engineer to build the evidentiary and argumentation infrastructure used to structure, verify, and communicate AI risk arguments for policymakers, researchers, journalists, and the public.

United States Full-time Senior AI Research Scientist
$160k-$210k
2 days, 4 hours ago
Insight Timer

Clinical AI Research Lead

Insight Timer 251-1K Media

Insight Timer is hiring a Clinical AI Research Lead to help evaluate and improve AI-powered wellbeing experiences across meditation, mental health, sleep, anxiety, stress, and behavior change.

Australia Full-time Lead AI Research Scientist Research Scientist
LLM
3 days, 7 hours ago

You're on a roll! Sign up now to keep applying.

Sign Up

Already have an account? Log in

Used by 14,729+ remote workers