Filters (Clear filters)
Salary
Categories
Search
Add
Company
Work model
Employment type
Find your next tech job
Most relevant

Search jobs

AI Engineer & Researcher - Post-trainingAI Engineer & Researcher - Post-training
xAI
San Francisco, Argentina (city)
$180k - $440k
AI
Reinforcement Learning
LLM
ML Engineer
Python
Search
Rust
Posted 2 hours ago
Sr. Paid Search ManagerSr. Paid Search Manager
Grammarly
United States, Northern America (country)
$142k - $196k
SQL
AI
Cloud
Search
Data science
Marketing
Databricks
Posted 6 hours ago
Senior Full Stack Software EngineerSenior Full Stack Software Engineer
MNTN
New York, United States (region)
$70k - $110k
Kubernetes
SQL
CSS
Software engineer
Typescript
Video
Full-stack
Git
Node.js
Marketing
React
Javascript
HTML
Docker
Open Source
Search
Cloud
GPT
AI
Posted 17 hours ago
Senior Full Stack Software EngineerNewSenior Full Stack Software EngineerNew
MNTN
United States, Northern America (country)
API
GPT
React
Kubernetes
Javascript
GitHub
Back-end
Front-end
AI
Search
AWS
Marketing
HTML
DevOps
Git
Docker
CSS
Full-stack
Software engineer
Typescript
Node.js
Cloud
Posted 17 hours ago
Content Marketing Manager - Generation GeniusContent Marketing Manager - Generation Genius
Newsela
San Francisco, Argentina (city)
$70k - $90k
CSS
Search
Marketing
HTML
Posted 17 hours ago
Growth Marketing ManagerNewGrowth Marketing ManagerNew
Espresa
United States, Northern America (country)
Video
Search
Marketing
Sales
Posted 1 day ago
Senior Fullstack Developer – AWS, Microservices & AutomationSenior Fullstack Developer – AWS, Microservices & Automation
P\S\L Group
Mexico, Central America (country)
Selenium
Lambda
Front-end
React
Terraform
S3 Bucket
GraphQL APIs
Python
ElasticSearch
Full-stack
DynamoDB
Solutions Architect
API
Kubernetes
Search
Cloud
CSS
Node.js
Developer
AWS
DevOps
GitHub
Docker
Back-end
Posted 2 days ago
Blockchain EngineerBlockchain Engineer
Flow Traders
Amsterdam, Netherlands (city)
Solidity
Redis
GCP
Kafka
AWS
API
Rust
Smart contract
Python
Back-end
Docker
Kubernetes
Cloud
Blockchain
Azure
grpc
Search
Web3
Java
Posted 2 days ago
Site Reliability EngineerSite Reliability Engineer
Flow Traders
Eastern Asia, Asia (sub-continent)
GCP
Kafka
Site reliability engineer
DevOps
AWS
Bash
Python
Docker
Ansible
Kubernetes
Cloud
Azure
Search
Terraform
Posted 2 days ago
Los Angeles Sales @ 7RLos Angeles Sales @ 7R
SevenRooms
Los Angeles, United States (city)
Marketing
Sales
Search
Posted 2 days ago
Product Manager - Group Meetings and EventsNewProduct Manager - Group Meetings and EventsNew
Duetto Research
Spain, Southern Europe (country)
Search
Cloud
Product Manager
Sales
Marketing
Posted 2 days ago
Contractor: Senior Machine Learning Engineering ServicesContractor: Senior Machine Learning Engineering Services
Newsela
Mexico, Central America (country)
SQL
Cloud
Keras
Search
NLP
Tensorflow
Python
AWS
PyTorch
Prompt Engineer
FastAPI
ML Engineer
Posted 3 days ago
Sr. Software EngineerSr. Software Engineer
ZipRecruiter
Tel Aviv, Israel (city)
Spring Boot
ElasticSearch
DynamoDB
Search
Kubernetes
Kafka
AI
Android
GCP
SQL
iOs
Java
AWS
Docker
Back-end
Azure
Posted 3 days ago
Software Engineer - Machine LearningSoftware Engineer - Machine Learning
ZipRecruiter
Tel Aviv, Israel (city)
S3 Bucket
Python
DynamoDB
Search
Kafka
AI
Android
ML Engineer
Cloud
SQL
iOs
Java
AWS
Azure
Posted 3 days ago
US Title Examiner - Title Full Search (Residential / Commercial) Work from OfficeNewUS Title Examiner - Title Full Search (Residential / Commercial) Work from OfficeNew
Stronghold Investment Management
Karnataka, India (region)
Search
Posted 3 days ago
Title Examiner - Title Full Search (Residential / Commercial) Work from OfficeTitle Examiner - Title Full Search (Residential / Commercial) Work from Office
Stronghold Investment Management
San Francisco, Argentina (city)
$60k - $80k
Search
Posted 3 days ago
Inside Sales - Associate Account ExecutiveInside Sales - Associate Account Executive
ZipRecruiter
Phoenix, United States (city)
$15 - $15
AI
Android
iOs
Sales
Search
Posted 3 days ago
Inside Sales - Account Executive, AcquisitionInside Sales - Account Executive, Acquisition
ZipRecruiter
Phoenix, United States (city)
$24 - $24
AI
Android
iOs
Sales
Search
Posted 3 days ago
Inside Sales - Account Executive, Inbound ChannelsInside Sales - Account Executive, Inbound Channels
ZipRecruiter
Phoenix, United States (city)
$15 - $15
AI
Android
iOs
Sales
Search
Posted 3 days ago
Digital PR & Content Marketing Manager - fully remote within Europe (m/f/d)Digital PR & Content Marketing Manager - fully remote within Europe (m/f/d)
JobLeads
Northern Europe, Europe (sub-continent)
Marketing
AI
SQL
Business Intelligence
Search
Posted 4 days ago
Short-Form Video Creator & EditorShort-Form Video Creator & Editor
Puffco
Los Angeles, United States (city)
$70k - $75k
Marketing
Video
Search
Posted 4 days ago
Senior Digital Marketing Account LeadSenior Digital Marketing Account Lead
Eulerity
United States, Northern America (country)
$85k - $115k
Marketing
Video
Agile
C
Search
Posted 4 days ago
Senior Digital Marketing Account LeadSenior Digital Marketing Account Lead
Eulerity
Dallas, United States (city)
$85k - $115k
Marketing
Video
Agile
C
Search
Posted 4 days ago
Autonomy Software Engineer | Ingénieur Logiciel en AutonomieAutonomy Software Engineer | Ingénieur Logiciel en Autonomie
Shearwater
Montréal, Canada (city)
Docker
C
Python
Search
Software engineer
Robotics
Posted 5 days ago
Federal Project ManagerFederal Project Manager
Juvare
United States, Northern America (country)
Project manager
Sales
Agile
Search
Posted 5 days ago
Senior Software Engineer - InsightsSenior Software Engineer - Insights
Pulumi Corporation
Seattle, United States (city)
$166k - $209k
Search
Azure
Open Source
GCP
LLM
Software engineer
Cloud
Developer
AI
AWS
Back-end
Posted 5 days ago
Senior Software Engineer, AI/LLMNewSenior Software Engineer, AI/LLMNew
Censys
Ann Arbor, United States (city)
$134k - $180k
Prompt Engineer
API
DevOps
Helm
Software engineer
C
Python
AI
Full-stack
Back-end
FastAPI
ML Engineer
Kubernetes
Cloud
Engineering Manager
React
Front-end
LLM
Search
Golang
Posted 5 days ago
Senior Software Engineer, AISenior Software Engineer, AI
Incident IQ
Alpharetta, United States (city)
Typescript
Software engineer
AI
React
Cloud
SQL
Prompt Engineer
Back-end
Azure
C
Search
Posted 5 days ago
Strategic Account Manager (DACH)Strategic Account Manager (DACH)
Bloomreach
United Kingdom, Northern Europe (country)
Marketing
AI
Account manager
C
Search
Posted 5 days ago
Audience Editor, VideoAudience Editor, Video
The New York Times
New York, United States (region)
$120k - $135k
Video
Search
Posted 6 days ago
Sr. Product Manager, Growth (Hybrid, Bellevue)Sr. Product Manager, Growth (Hybrid, Bellevue)
OfferUp
Bellevue, United States (city)
$175k - $195k
Product Manager
Agile
Android
Phoenix
Search
iOs
Posted 6 days ago
Outside Sales RepresentativeOutside Sales Representative
Hibu
Huntsville, United States (city)
$85k - $95k
Marketing
Sales
Video
Search
Posted 6 days ago
Growth Marketing ManagerGrowth Marketing Manager
CLEAR - Corporate
New York, United States (region)
$100k - $120k
Marketing
Data science
Search
Posted 6 days ago
Permanent Placement: Clinical Search - RecruiterPermanent Placement: Clinical Search - Recruiter
Curative
Irving, United States (city)
Search
Marketing
C
Posted 7 days ago
Key Account Manager - Rhode IslandKey Account Manager - Rhode Island
Braeburn
Rhode Island, United States (region)
Account manager
Sales
Search
Posted 7 days ago
Senior Enterprise Account Manager, EMEANewSenior Enterprise Account Manager, EMEANew
Pacvue
United Kingdom, Northern Europe (country)
ML Engineer
Account manager
AI
Sales
Search
Posted 8 days ago
.Net Software Engineer.Net Software Engineer
KAYAK
Kaunas, Lithuania (city)
€2k - €3k
Full-stack
Javascript
Kubernetes
Network
Cloud
SQL Server
grpc
Developer
Typescript
Azure
AWS
Docker
AI
React
MySql
Java
Search
Posted 8 days ago
Junior Java Software EngineerJunior Java Software Engineer
KAYAK
New York, United States (region)
$80k - $100k
Back-end
ElasticSearch
Spring Boot
Software engineer
Search
Java
SQL
Posted 8 days ago
Junior Java Software EngineerJunior Java Software Engineer
KAYAK
San Francisco, Argentina (city)
$70k - $90k
Back-end
ElasticSearch
Spring Boot
Software engineer
Search
Java
SQL
Posted 8 days ago
Java Software EngineerJava Software Engineer
KAYAK
Vilnius, Lithuania (city)
€2k - €3k
ElasticSearch
Software engineer
Spring Boot
SQL
Java
Search
Back-end
Posted 8 days ago
Product Marketing ManagerProduct Marketing Manager
Juvare
Atlanta, United States (city)
Jira
Cloud
Marketing
Figma
Sales
Search
Posted 8 days ago
Staff Python EngineerStaff Python Engineer
primer.ai
San Francisco, United States (city)
$185k - $245k
NLP
ElasticSearch
Agile
Kubernetes
Cloud
Golang
Terraform
Python
GCP
Azure
Flask
Kafka
ML Engineer
AWS
GitHub
AI
Open Source
Architect
Redis
Search
DevOps
Posted 8 days ago
Account Manager, E-Commerce Strategy & AnalyticsAccount Manager, E-Commerce Strategy & Analytics
Stackline
Minneapolis, United States (city)
$80k - $120k
Salt
Account manager
Search
Sales
SQL
Network
Marketing
Posted 8 days ago
Digital Marketing ManagerDigital Marketing Manager
Alarm.com
Liberty Lake, United States (city)
$80k - $120k
Business Intelligence
Jira
Cloud
Network
Marketing
.NET
Video
Sales
Search
Posted 8 days ago
Staff Machine Learning EngineerStaff Machine Learning Engineer
Angi
New York, United States (region)
$200k - $280k
Python
Business Intelligence
SQL
Network
Cloud
LLM
ML Engineer
AI
Data science
Search
Posted 9 days ago
Performance Marketing SpecialistPerformance Marketing Specialist
HousingAnywhere Group
Netherlands, Western Europe (country)
Marketing
Search
Posted 9 days ago
Senior Data AnalystSenior Data Analyst
HousingAnywhere Group
Netherlands, Western Europe (country)
Python
Business Intelligence
SQL
Data Analyst
Search
Posted 9 days ago
Team Lead, Indirect SalesTeam Lead, Indirect Sales
Constant Contact
Waltham, United States (city)
$115k - $127k
C
Sales
Search
Posted 9 days ago
Senior Product Manager - Mobile AppSenior Product Manager - Mobile App
Constant Contact
Ontario, Canada (region)
$119k - $149k
Product Manager
Agile
Marketing
C
Sales
Search
Posted 9 days ago
Senior Data AnalystSenior Data Analyst
NT Concepts
Vienna, United States (city)
Angular
Javascript
NLP
ElasticSearch
Agile
JSON
Data Analyst
Cloud
LLM
CSS
Node.js
Python
Typescript
XML
SQL
HTML
Redis
Search
Posted 9 days ago
Published: 2025-07-21  •  San Francisco, Argentina (city)
AI
LLM
ML Engineer
Search
Python
Reinforcement Learning
Rust
$180k - $440k
On-site
Full-time
About xAI

xAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge.

Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity.

We operate with a flat organizational structure. All employees are expected to be hands-on and to contribute directly to the company’s mission. Leadership is given to those who show initiative and consistently deliver excellence. Work ethic and strong prioritization skills are important.

All engineers and researchers are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.

About the Role

The post-training team at xAI transforms powerful pre-trained models to become steerable, versatile, and capable of understanding and addressing real-world challenges.

As a post-training researcher/engineer, you will enhance the model's instruction-following capability and general usefulness to fulfill our mission – developing AI systems that can accurately understand the universe, create new knowledge, and improve themselves through interactions.

Focus
  • Creating and driving research agenda to advance model quality.
  • Improving data mixtures by building data collection pipelines and developing data generation techniques.
  • Creating generalizable reward models and developing novel reinforcement learning algorithms.
  • Designing and implementing robust model evaluations.
  • Designing and implementing large-scale model training frameworks.
  • Collaborating with pre-training, reasoning, data, multimodal, applied, product efforts to push the frontiers of model capability.
Ideal Experiences
  • Expert in ML and fine-tuning large language models.
  • Track record in leading research that significantly impacts AI advancement.
  • Experience in data-driven large language model behavior improvements.
  • Experience in advanced reinforcement learning or inference-time search techniques.
  • Experience in developing benchmarks or large-scale distributed machine learning systems.
  • Experience in model optimizations under complex setups (e.g., multi-modality, multi-context, multi-agent, long-horizon tasks, diverse user preference/feedback).
Location

The role is based in the Bay Area [San Francisco and Palo Alto]. Candidates are expected to be located near the Bay Area or open to relocation.

Tech Stack
  • Python
  • Jax
  • Rust
Interview Process

After submitting your application, the team reviews your CV and statement of exceptional work. If your application passes this stage, you will be invited to a 15-minute interview (“phone interview”) during which a member of our team will ask some basic questions. If you clear the initial phone interview, you will enter the main process, which consists of four technical interviews:

  1. Coding assessment in a language of your choice.
  2. 2 x post-training technical sessions: These sessions will be testing your ability to formulate, design and solve concrete problems in post-training. It can be research or engineering, depending on background/experience. 
  3. Meet the Team: Present your past exceptional work and your vision with xAI to a small audience.

Our goal is to finish the main process within one week. All interviews will be conducted via Google Meet.

Annual Salary Range

$180,000 - $440,000 USD

xAI is an equal opportunity employer and does not unlawfully discriminate based on race, color, religion, ethnicity, ancestry, national origin, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender, gender identity, gender expression, age, disability, medical conditions, genetic information, marital status, military or veteran status, or any other applicable legally protected characteristics. 

Qualified applicants with arrest or conviction records will be considered for employment in accordance with all applicable federal, state, and local laws, including the San Francisco Fair Chance Ordinance, Los Angeles County Fair Chance Ordinance for Employers, and the California Fair Chance Act. 

For Los Angeles County (unincorporated) Candidates:

xAI reasonably believes that criminal history may have a direct, adverse and negative relationship on the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: 

  • Access to information technology systems and confidential information, including proprietary and trade secret information, and/or user data;
  • Interacting with internal and/or external clients and colleagues; and
  • Exercising sound judgment.

California Consumer Privacy Act (CCPA) Notice

Looking for talent?

Get in front of thousands of skilled ML/AI Engineers and discover a suitable candidate for your job opening.