Keystone Recruitment Jobs in United States

We are building a specialized red team to proactively stress-test advanced AI systems. The safest AI systems are those that have already been rigorously challenged by skilled human adversaries. · ...

We are collecting diverse voice recordings to support the development of a multilingual AI platform. · Place calls to a designated demo phone line and record the caller side only · Produce short, natural-sounding phone conversations with varied tone, pace, and pauses · ...

We are seeking Visual Designers to help shape critique and experiment with multi-modal design processes across digital interactive and immersive media. · Design review and critique AI-generated visual and creative workflows · Collaborate with a multidisciplinary team of designers ...

One of our clients is seeking experienced management and strategy professionals to support high-impact analytical and strategic initiatives within AI-focused research and product development teams. · ...

We are seeking an Advanced Mathematics Research Analyst to support large language model training and evaluation initiatives. You will analyze complex mathematical and logical problems, validate reasoning, · and develop structured explanations that improve AI model performance.You ...

Title: · English and Spanish Writing Specialist (Remote) · Engagement: · Hourly contract (independent contractor) · Rate: · USD 18.14/hour · Location: · Remote – candidates based in the United States, United Kingdom, Canada, Europe, Singapore, Dubai, or Australia who are legally ...

+Job summaryWe are recruiting experienced Financial Risk Specialists to support a research initiative for one of our clients. · +Qualifications4+ years of full-time professional experience as a financial risk specialistStrong understanding of financial risk management principles, ...

+ Lead Fullstack Engineer · Job Title: · Lead Fullstack Engineer (Remote) · Role Overview:We are seeking an experienced Fullstack Engineering Lead to design, build, and operate scalable web applications and production-grade LLM-powered systems. · ...

We are seeking highly qualified chemistry professionals to support the evaluation and improvement of advanced AI systems. · Review and evaluate AI-generated responses to chemistry-related questions for scientific accuracy, mechanistic correctness, and quantitative reasoning. · Cr ...

We are recruiting experienced Marriage and Family Therapists to support a research initiative for one of our clients. · Develop and review questions that reflect the duties and responsibilities of marriage and family therapists · Apply practical knowledge of therapeutic technique ...

+4+ years of full-time professional experience as a postsecondary education teacher Strong understanding of adult learning principles teaching methods and assessment techniques Excellent written communication and attention to detail Access to a desktop or laptop computer Must be ...

Our client is seeking experienced Environmental Scientists and Specialists to contribute to a research project for one of the world's leading AI companies. · ...

We are seeking an experienced finance professional to join our customer's AI team as a Structured Finance – AI Trainer. · ...

We are recruiting experienced Credit Authorizers Checkers and Clerks to support a research initiative for one of our clients This project involves using your professional experience to design occupation specific questions related to your field · Develop and review questions refle ...

+Evaluates and improves how AI systems respond to clinical and health-related questions ensuring outputs are accurate clear safe and aligned with real-world healthcare standards.+ · + · + + Write and refine prompts that guide AI behavior in healthcare medical scenarios · + Evalu ...

We are seeking an experienced Engineering Project Coordinator III to support hardware development programs within a fast-paced consumer electronics environment. · Partner with Technical Program Managers to support hardware program execution and ensure timely delivery of hardware ...

One of our clients is seeking experienced professionals in special needs financial planning to support a structured content development initiative focused on disability-related financial planning and public benefits coordination. · ...

We are seeking experienced operations professionals to support the development of AI systems focused on real-world business workflows. In this remote contract role, you will contribute practical insights related to manufacturing, food service, and retail operations to help improv ...

We are seeking detail-oriented language and transcription specialists to support a high-impact audio and video AI research project. · ...

Evaluate AI-generated responses for accuracy, clarity, tone, and completeness · ...