QA Tester - Washington, DC

As a Prompt Engineer focused on Data Science and Quality Analysis, you’ll design, test, and evaluate prompts for AI systems that interact with real-world restaurant data. You’ll work cross-functionally to develop AI solutions that drive operational efficiency, improve data interpretation, and support smarter decision-making for restaurant operators. Your work will directly shape how AI models perform in high-stakes, dynamic environments like order processing, reporting, support automation, and performance analysis. Essential Job Functions: Prompt Design & Evaluation: Develop, test, and refine prompts for tasks such as text generation, question answering, data classification, and structured data extraction to optimize Voice AI performance. Data-Driven Analysis & Quality Measurement: Design evaluation frameworks and analyze prompt outputs using quantitative metrics, human-in-the-loop evaluation, and user feedback to identify improvement opportunities. Experimentation & Iteration Conduct experiments to test prompt variations, measure their business and operational impact, and iterate to enhance accuracy, consistency, and safety. Regression Testing & Compliance Build principled regression test suites using tools like LangFuse and Galileo to ensure prompts remain compliant and high-performing as models and use cases evolve. Collaboration Across Teams: Work closely with data science, product, legal, engineering, and operations teams to align prompt designs with business goals, operational workflows, and compliance requirements. Model Adaptation & Strategy Development prompts across multiple LLMs (GPT, LLaMA, Gemini, and Checkmate’s fine-tuned models), understanding model differences to optimize outputs effectively. Team Leadership & Mentorship Lead a team of analysts focused on prompt evaluation and data quality analysis, guiding prioritization, experimentation, and reporting. Collaborate with ops teams for seamless deployment and feedback loops. Research & Continuous Learning Stay up to date on emerging prompting techniques, LLM behaviors, evaluation frameworks, and AI safety practices to keep Checkmate’s AI solutions best-in-class. Requirements Strong analytical and data science skills, with hands-on experience in Python (pandas, NumPy, scikit-learn) Experience designing and conducting experiments and evaluations in applied AI or NLP contexts Proficiency in SQL and working with relational databases (e.g. MySQL, PostgreSQL, Oracle, MS SQL) Good understanding of data processing, quality measurement, and testing fundamentals Experience leading analyst or operations teams, with strong prioritization, mentorship, and collaboration skills Strong problem-solving mindset with a drive to explore, optimize, and automate workflows Excellent communication skills for presenting insights to technical and non-technical stakeholders Bachelor’s degree in Data Science, Computer Science, Statistics, Engineering, or a related field Flexible to work US hours until at least 6 pm ET, with a strong remote setup Preferred Qualifications Experience with LLM evaluation and prompt engineering workflows Familiarity with tools like LangFuse and Galileo for prompt evaluation and analysis Knowledge of cloud platforms (AWS, GCP, Azure) and data pipeline tools Familiarity with machine learning concepts and NLP workflows Master’s or PhD in Data Science, Statistics, Computer Science, or a related field Benefits Health Care Plan (Medical, Dental & Vision) Retirement Plan (401k) Life Insurance (Basic, Voluntary & AD&D) Flexible Paid Time Off Family Leave (Maternity, Paternity) Short Term & Long Term Disability Training & Development Work From Home Stock Option Plan

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Seattle & Los Angeles overseas warehouses are currently hiring full-time and part-time staff [Job Opening in the USA] Warehouse Picker Job Responsibilities: 1. Handle daily warehouse operations, including receiving, shipping, and scanning items 2. Ensure warehouse operations comply with company policies and maintain warehouse safety 3. Assist supervisors in completing related tasks Requirements: 1. Strong English communication skills and the ability to collaborate effectively with team members 2. Team-oriented with the ability to adapt to a fast-paced work environment 3. Highly responsible and self-motivated Additional Information: Transportation options: - Seattle warehouse at 14810: Light rail available nearby; 20-minute walk to the warehouse - Seattle warehouse at 3985: Bus routes 400/501 available; 15-minute walk to the warehouse Contact: Direct hiring by the warehouse – work with peace of mind. Feel free to reach out! Manager Zhang: 9093788999

Remote part-time job with payment based on output, available in daily, weekly, or monthly settlements. Job Responsibilities 1. Screen and reply to Reddit questions daily, with a minimum of 6 replies per day (subject to approval upon review). 2. Post follow-up comments on the latest IG/FB posts, FB groups, or trending TikTok videos daily, and collect at least 30 valid leads per day (subject to approval upon review). Requirements ✔ English proficiency: Ability to fluently read and write in English (Reddit, IG, FB, and TikTok are all English-language environments). ✔ Must have accounts on any two of the following platforms: Reddit, Instagram, Facebook, or TikTok, and be familiar with their community guidelines. ✔ Strong execution skills: Ability to follow standard operating procedures (SOPs) and ensure high-quality responses. ✔ Prior experience in marketing or community management, and interest in cross-border e-commerce is preferred. Hiring Period: August How to Apply: Add WeChat ID yuki2028666