STEM Careers in the United States

STEM Careers in the United States

Date: 25-02-2026 | Company: Rexzone | Country: US | Remote Type: Remote | Employment Type: FULL_TIME | Experience Level: Mid-Senior | Industry: Technology | Job Function: Engineering | Skills: STEM engineering, machine learning, LLM evaluation, RLHF, data labeling, prompt evaluation, QA evaluation, NLP, computer vision annotation, named entity recognition, content safety labeling, training data quality, annotation guidelines compliance, model performance improvement | Salary Currency: USD | Salary Min: 63360 | Salary Max: 126720 | Pay Period: YEAR

Responsibilities

• Develop and implement machine learning models
• Evaluate large language models (LLM)
• Perform data labeling tasks including prompt evaluation, QA evaluation, and content safety labeling
• Ensure compliance with annotation guidelines and improve model performance
• Contribute to the development of training data quality standards

Requirements

• Bachelor's degree in Computer Science, Engineering, or related field
• At least 3 years of relevant work experience in machine learning or related fields
• Experience with programming languages such as Python, Java, or C++
• Strong understanding of deep learning frameworks like TensorFlow, PyTorch, or Keras
• Excellent problem-solving skills and attention to detail
• Ability to work independently and as part of a team

Qualifications

• Proficiency in natural language processing (NLP) techniques
• Knowledge of computer vision annotation tools and techniques
• Experience with named entity recognition and content safety labeling
• Understanding of reinforcement learning (RL) and human-in-the-loop feedback (HITL)

Skills

• STEM engineering
• Machine learning
• LLM evaluation
• RLHF
• Data labeling
• Prompt evaluation
• QA evaluation
• NLP
• Computer vision annotation
• Named entity recognition
• Content safety labeling
• Training data quality
• Annotation guidelines compliance
• Model performance improvement

Benefits

• Flexible remote work options
• Competitive salary range: $63,360 - $126,720 annually
• Annual pay period

Pay

• Salary currency: USD
• Salary range: $63,360 - $126,720 annually

Schedule

• Remote work option available