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Relace

Machine Learning Scientist

RelaceSan Francisco, CA

Advances small, high-performance language models for retrieval, application, and code generation. Requires 2+ years ML research/production experience, Python/PyTorch/JAX fluency, optimization expertise, and advanced degree.

Salary not listed
On-site2+ YOEML Engineering
Raylu

Senior AI Engineer

RayluNew York, NY

Builds and productionizes LLM-powered agent workflows, focusing on orchestration, evaluation, reliability, safety controls, and product iteration. Requires strong agentic systems expertise and engineering skills for scalable AI systems.

165k – 250k/yr
On-siteML Engineering
Raylu

Senior Data Engineer

RayluNew York, NY

Designs and runs massive-scale data pipelines for ingestion, normalization, enrichment, and delivery across 80M+ companies and 800M+ people. Manages data operations, BPO vendors, partnerships, monitoring, and cost optimization using Python, Dagster, and DuckDB.

165k – 250k/yr
On-siteData Engineering
Siftstack

Staff Software Engineer, Data

SiftstackMarina Del Rey, CA +1

Build scalable data infrastructure to ingest and process millions of hardware telemetry data points per second. Requires 7+ years in data engineering, streaming systems like Flink/Kafka, databases like PostgreSQL/Druid, and languages like Go/Rust/Python.

200k – 250k/yr
Hybrid7+ YOEData Engineering
Cognition

AI Enablement Engineer

CognitionSan Francisco, CA +1

AI Enablement Engineers guide enterprise teams in adopting Devin AI software engineer, leading workshops, pair programming on real projects, and scaling enablement programs globally. Requires 3+ years software engineering experience in Python/JS, strong communication, and customer-facing skills.

Salary not listed
On-site3+ YOEML Engineering
Bubble

Senior Software Engineer, AI/LLM

BubbleNew York, NY

Builds and optimizes LLM-driven features, agentic workflows, and proprietary AI models for Bubble's visual app development platform. Requires Master's/PhD + 2+ years or 5+ years ML/software experience with transformers, RAG, and AI tools.

201k – 261k/yr
Hybrid2+ YOEML Engineering
Kepler

Head of AI Research

KeplerNew York, NY

Lead AI research defining the agenda for trustworthy agentic systems, memory, retrieval, and evaluation frameworks. PhD required with 5+ years focused on LLMs/agents and a strong publication record; work ships directly to production for high-stakes financial users.

400k – 700k/yr
On-site5+ YOEAI Research
Idler

Senior Software Engineer

IdlerSan Francisco, CA

Designs and builds scalable agentic systems for generating and QA'ing reinforcement learning environments that teach AI models to code. Collaborates with AI researchers using TypeScript, React, NodeJS stack in a tight-knit founding team.

180k – 280k/yr
On-siteML Engineering
Bayesian Health

Senior/Staff Machine Learning Data Scientist

Bayesian HealthUnited States

Develops, productionizes, and deploys end-to-end ML models for real-time clinical predictions using production Python/SQL. Owns model performance from prototyping to real-world impact, collaborating cross-functionally. Requires PhD + 3+ years shipping ML products.

Salary not listed
RemoteData Science
Ambient.ai

Applied Research Scientist - Foundation Models

Ambient.aiRedwood City, CA

Develops and optimizes transformer-based vision-language foundation models for physical security, owning full-cycle training, fine-tuning, compression, and deployment for real-time inference on images, videos, and text. Requires PhD/Master's in CS/EE, hands-on ML expertise with PyTorch/TensorFlow, Transformers, and ViTs.

140k – 175k/yr
HybridML Engineering
Starbridge

AI Engineer

StarbridgeNew York, NY

Builds, evaluates, and deploys LLM-driven features like document analysis and chat experiences using models from OpenAI, Anthropic, and Gemini. Requires 5+ years in software engineering and AI/ML, Python proficiency, and product thinking for scalable systems.

200k – 380k/yr
On-site5+ YOEML Engineering
Shield AI

Senior Engineer, State Estimation

Shield AIDallas, TX +3

Develop and optimize real-time multi-sensor fusion and state estimation algorithms (Kalman/particle filters, IMUs, radar, cameras) for autonomous X-BAT VTOL drone operation in contested environments on the GNC team.

160k – 240k/yr
On-site5+ YOEML Engineering
Rad AI

Staff ML Research Scientist

Rad AISan Francisco, CA

Leads end-to-end applied ML research in NLP, LLMs, retrieval, and multimodal models for healthcare AI, driving from experimentation to production deployment with rigorous evaluation and clinician collaboration. Requires 7+ years experience, MS/PhD, and depth in ML areas like PyTorch tooling.

190k – 260k/yr
On-site7+ YOEAI Research
Distyl AI

Applied AI Researcher, System Discovery

Distyl AISan Francisco, CA +1

Applied AI Researcher on System Discovery team explores new AI system architectures, prototypes human-AI collaborations, and draws cross-domain insights to redefine enterprise workflows. Requires proven research track record, expertise in compound AI systems and agentic techniques, strong programming for rapid prototyping.

150k – 250k/yr
HybridAI Research
Distyl AI

Applied AI Researcher, System Self-Construction

Distyl AISan Francisco, CA +1

Designs self-constructing AI systems that autonomously generate, assemble, and refine subsystems using meta-learning, program synthesis, and evolutionary methods. Requires proven research in modular AI architectures, daily AI tool usage, and strong prototyping skills.

150k – 250k/yr
HybridAI Research
Distyl AI

Applied AI Researcher, System Self-Improvement

Distyl AISan Francisco, CA +1

Designs feedback-driven AI architectures for system self-improvement, enabling autonomous evolution through reflection, retraining, and adaptation. Requires proven research in compound AI systems, daily AI tool usage, and strong prototyping skills.

150k – 250k/yr
HybridAI Research
Distyl AI

Applied AI Researcher, AI Systems

Distyl AISan Francisco, CA +1

Designs and researches compound AI systems integrating LLMs, agents, and execution components for reliable enterprise workflows. Requires proven AI research track record, daily AI tool usage, strong prototyping skills, and expertise in agentic techniques.

150k – 250k/yr
HybridAI Research
Distyl AI

Applied AI Researcher, Post-Training

Distyl AISan Francisco, CA +1

Develops and evaluates post-training techniques like supervised fine-tuning, RLHF/DPO, and continual adaptation to align foundation models with enterprise systems. Requires expertise in adapting LLMs/SLMs, compound AI systems, and strong prototyping skills.

150k – 250k/yr
HybridAI Research
Distyl AI

Applied AI Researcher, Benchmarking

Distyl AISan Francisco, CA +1

Designs and constructs AI benchmarks and evaluation frameworks to measure reasoning, reliability, and real-world impact of intelligent systems. Requires experience with model evaluations, statistical rigor, building with AI models, and strong programming for prototypes.

150k – 250k/yr
HybridAI Research
Retell AI

Senior Machine Learning Engineer

Retell AIRedwood City, CA

Builds and deploys production ML models for real-time voice AI agents, fine-tuning LLMs and audio models, running benchmarks and human evaluations, and maintaining ML infrastructure for high-scale performance.

225k – 325k/yr
On-siteML Engineering
Trexquant

Quantitative Researcher - Volatility (USA)

TrexquantStamford, CT +1

Develops volatility trading strategies, builds pricing tools, calibrates implied volatility surfaces, and analyzes large datasets for alpha signals in volatility markets. Requires 5+ years in quantitative research focused on volatility, Python proficiency, and STEM degree.

130k – 200k/yr
On-site5+ YOEData Science
Perpay

Senior Data Scientist

PerpayPhiladelphia, PA

Leads end-to-end data science projects from ideation to deployment, building scalable ML models and pipelines to drive business impact. Requires 5+ years in ML, Python data stack, cloud infrastructure, and strong communication skills.

Salary not listed
On-site5+ YOEData Science
Radar Labs

Senior / Staff Data Platform Engineer

Radar LabsNew York, NY

Builds and modernizes data platform infrastructure handling billions of API calls using tools like Kinesis, S3, Athena, and Airflow. Collaborates with customers to incorporate feedback and requires experience with data stacks including Snowflake or Databricks.

200k – 300k/yr
On-siteData Engineering
Alleviate Health

Founding Engineer

Alleviate HealthSan Francisco, CA

Builds and scales AI agents for autonomous patient recruitment, screening, data collection, and 24/7 support in clinical trials. Focuses on ML models, multi-channel LLM deployment, and integrating legacy healthcare systems.

Salary not listed
On-siteML Engineering
Twenty

Staff Data Engineer - TS/SCI Cleared

TwentyArlington, VA

Leads development of high-performance data lakes and ETL pipelines for petabyte-scale cyber operations data. Partners with engineers and analysts to build reliable data systems, drives technical initiatives, and mentors team members. Requires 8+ years experience and TS/SCI clearance.

Salary not listed
On-site8+ YOEData Engineering
Abridge

Senior Data Scientist

AbridgeSan Francisco, CA

Senior Data Scientist extracts insights from healthcare data, models user behavior, designs A/B tests, and evaluates AI models to drive product improvements and business decisions. Requires 8+ years in Python, R, SQL analytics and 5+ years in product-facing roles.

188k – 221k/yr
Hybrid8+ YOEData Science
OpenAI

Software Engineer, Inference – AMD GPU Enablement

OpenAISan Francisco, CA

Develops and optimizes OpenAI's inference infrastructure for AMD GPUs, handling low-level kernel performance, distributed execution, and integration with serving frameworks like vLLM and Triton. Requires expertise in GPU programming with HIP/CUDA and distributed systems scaling.

295k – 555k/yr
On-siteML Engineering
Eightsleep

AI/ML Research Internship

EightsleepSan Francisco, CA

AI/ML research intern building prototypes for sleep fitness applications like multimodal activity understanding, time-series forecasting, and personalized thermoregulation. Works with cross-functional team on data-driven solutions; requires student status in CS/data science/ML-related field, prefers research experience and ML proficiency.

Salary not listed
HybridEntry levelAI Research
Sphere

Lead AI Engineer

SphereSan Francisco, CA

Leads development of proprietary AI reasoning model TRAM for interpreting global trade law, building data pipelines, fine-tuning LLMs, and evaluation frameworks for high-speed, accurate compliance determinations. Requires AI product experience, especially RAG systems and model fine-tuning.

250k – 280k/yr
On-siteML Engineering
Alembic

Research Engineer - Causal AI

AlembicSan Francisco, CA

Designs and implements novel causal inference algorithms and production systems for marketing attribution challenges at enterprise scale. Requires 5+ years shipping research code, strong math/stats background, Python proficiency, and customer collaboration.

200k – 250k/yr
On-site5+ YOEML Engineering
character.ai

Research Engineer, AI Safety & Alignment

character.aiRedwood City, CA

Develops evaluation methods, alignment techniques, and adversarial testing for large language models to ensure safety and alignment with human values. Requires PhD in ML/CS, production code skills, GPU experience, and transformers/RL expertise.

225k – 400k/yr
On-siteAI Research
OpenAI

Data Scientist, Financial Engineering

OpenAISan Francisco, CA

Owns analytics and experimentation for checkout, payments, subscriptions, and pricing to boost revenue, reduce churn, and scale globally. Requires 5+ years in data science or product analytics with SQL/Python fluency and A/B testing expertise in high-growth/fintech settings.

230k – 385k/yr
Hybrid5+ YOEData Science
OpenAI

Data Scientist, Codex

OpenAISan Francisco, CA

Data Scientist measures and accelerates product-market fit for AI developer tools by defining developer productivity metrics, running A/B tests on coding models and UX, and building dashboards. Requires 5+ years quantitative experience, SQL/Python fluency, and experiment design skills.

230k – 385k/yr
Hybrid5+ YOEData Science
OpenAI

Data Scientist, Platform and B2B Products

OpenAISan Francisco, CA

Drive data-driven decisions for OpenAI's API and B2B platform by defining metrics, running A/B tests, building dashboards, and partnering with PMs and engineers to enhance developer experience and product impact. Requires 5+ years in quantitative roles with strong SQL/Python skills.

230k – 385k/yr
Hybrid5+ YOEData Science
Zoox

Machine Learning Engineer, Simulation Scenario Generation

ZooxFoster City, CA

Develops ML models and workflows for generating simulation scenarios in autonomous vehicle testing, integrating LLMs/VLMs, collecting data for fine-tuning, and collaborating with teams to enhance safety validation. Requires MS/PhD, 2+ years ML experience, and Python/PyTorch proficiency.

151k – 257k/yr
Hybrid2+ YOEML Engineering
Mercor

Data Engineer

MercorSan Francisco, CA +1

Builds and maintains scalable data pipelines for ingestion, transformation, and reliability using SQL, Python, dbt, and Fivetran to support data science, engineering, and product teams. Requires proven data engineering experience with modern data stack tools.

130k – 500k/yr
On-siteData Engineering
WHOOP

Senior Machine Learning Engineer (Data Science Algorithms)

WHOOPBoston, MA

Designs, builds, and productionizes scalable ML systems using physiological data to deliver personalized health metrics. Requires 4+ years ML engineering experience, strong Python, cloud deployment, and backend skills.

Salary not listed
On-site4+ YOEML Engineering
Numeral

Data Analyst

NumeralSan Francisco, CA +1

Reconciles financial and transactional data from sources like Stripe and Shopify for accurate sales tax filings. Normalizes data, troubleshoots onboarding issues, supports teams with insights, and improves DBT pipelines. Requires strong SQL, analytical skills, and experience with messy datasets.

55k – 120k/yr
HybridData Analytics
Perplexity

AI Engineer, Applied ML

PerplexitySan Francisco, CA +2

Designs, builds, and iterates on AI/ML models for personalization, query understanding, and content discovery. Requires 5+ years in ML, deep learning expertise (PyTorch/TensorFlow/JAX), Python, and full ML lifecycle ownership.

220k – 405k/yr
On-site5+ YOEML Engineering
Perplexity

AI Researcher

PerplexitySan Francisco, CA +1

Advances AI products through post-training SOTA LLMs using supervised and reinforcement learning techniques on rich query datasets. Owns data pipelines, training frameworks, and model integration while collaborating across teams. Requires 2-6+ years in large-scale LLMs and Python/PyTorch expertise; PhD preferred.

220k – 485k/yr
On-site2+ YOEAI Research
CodeRabbit

Applied AI Engineer

CodeRabbitSan Francisco, CA

Designs, builds, and deploys generative AI systems including LLM-based code reviews, agentic workflows, and RAG pipelines for developer productivity tools. Requires 3+ years in ML/LLM production systems, Python/TypeScript proficiency, and AI frameworks like LangChain.

175k – 275k/yr
Hybrid3+ YOEML Engineering
OpenAI

Software Engineer, Data Infrastructure - Research

OpenAISan Francisco, CA

Designs and implements dataset infrastructure for OpenAI's large-scale LLM training stack, including standardized APIs for multimodal data, scaling pipelines across GPU fleets, and performance debugging. Requires strong distributed systems experience and collaboration with researchers.

250k – 380k/yr
On-siteData Engineering
Voltai

Machine Learning Engineer

VoltaiPalo Alto, CA

Develops and deploys AI/ML models including fine-tuning LLMs and multi-modal systems from concept to production. Requires strong AI/ML skills from top CS/EECS/Math/Physics programs and proven production experience.

Salary not listed
On-siteML Engineering
OpenAI

AI Deployment Engineer, Gov

OpenAIWashington, DC

Partners with government agencies to develop and deploy GenAI applications using OpenAI API, from strategy to production. Requires 7+ years public sector technical consulting, TS/SCI clearance, and ML implementation experience.

137k – 250k/yr
Hybrid7+ YOEML Engineering
Labelbox

Applied Research Engineer

LabelboxUnited States

Develops advanced systems for human-in-the-loop AI data alignment using RLHF/DPO, improves data quality, and builds AI-assisted labeling tools. Requires Master's/PhD, 3+ years ML experience, Python/PyTorch proficiency, and top-tier publications.

250k – 300k/yr
Hybrid3+ YOEAI Research
Zoox

AV Safety Data Reporting Engineer

ZooxFoster City, CA

Develops and maintains safety data pipelines, dashboards, and AI-assisted triage processes for AV fleet data to support compliance and internal learnings. Requires 4+ years with large-scale datasets, Python/SQL expertise, and dashboard tools like Looker/Databricks.

175k – 210k/yr
Hybrid4+ YOEData Engineering
Collate

AI Research Scientist

CollateSan Francisco, CA

AI Research Scientist explores novel LLM modeling, NLP, and reasoning approaches for healthcare applications, prototypes capabilities, and deploys them into production with engineering and product teams. Requires strong ML/NLP background with publications and hands-on deep learning experience.

Salary not listed
On-siteAI Research
LangChain

Fullstack Software Engineer, Applied AI

LangChainNew York, NY +2

Builds and deploys production-grade AI agents and workflows for business functions like marketing, recruiting, and product. Requires 3+ years experience shipping AI/ML apps, including LLM systems, with strong Python/TypeScript skills.

165k – 190k/yr
On-site3+ YOEML Engineering
Ironclad

Staff Software Engineer - Applied AI

IroncladSan Francisco, CA +3

Develops full-stack AI features for legal contracting platform using TypeScript, React, Node.js, and LLMs. Builds scalable SaaS products like summarization and redlining, collaborating with product and design teams to deliver high-impact capabilities.

240k – 295k/yr
HybridML Engineering
Letta

Research Engineer / Scientist, Memory

LettaSan Francisco, CA

Designs long-term memory architectures for LLMs, builds multi-type memory systems, researches agent memory sharing and context management, and runs evaluations. Requires deep LLM/retrieval expertise and impactful research track record.

Salary not listed
On-siteAI Research