AI / NLP Engineer

AI / NLP EngineerSquarePeg.ai | Remote | Early Stage StartupJoin SquarePeg.ai, a fast-growing HR Tech startup that's already captured 50+ customers just months after launching in 2025. Backed by top-tier investors, we're building cutting-edge AI tools that are transforming job applications and resume review processes—and we need a versatile NLP Engineer to help us scale our impact. What You'll BuildAs our AI Engineer specializing in Data & ML, you'll be the technical force behind our core matching algorithms. You'll work directly with our founding team of 12 to enhance the AI systems that connect the right candidates with the right opportunities. What You'll DoNLP for Matching & ScoringBuild and maintain taxonomies for candidate and job attributes; bootstrap gold datasets and evaluation pipelines. Extract and normalize entities from resumes and job descriptions; craft and optimize prompts and fine-tuned models. Develop and refine retrieval, ranking, and scoring using embedding-based methods and LLMs. Refine our proprietary scoring algorithms that evaluate candidate-job compatibilityConduct deep-dive analyses to identify patterns in successful hires and optimize our recommendation engineImplement innovative NLP solutions that understand context, intent, and nuance in hiring languageEntity Resolution & Data EngineeringDesign and implement robust data pipelines that can handle massive volumes of resume and job posting dataBuild sophisticated entity resolution systems to normalize and deduplicate candidate profiles across multiple data sourcesCreate scalable data architectures that power real-time matching at scaleProduct ImpactCollaborate directly with our product team to translate business requirements into technical solutionsOwn the end-to-end ML lifecycle from experimentation to production deploymentContinuously iterate on algorithms based on customer feedback and performance metricsWhat You BringTechnical Expertise:Deep understanding of machine learning algorithms, particularly in recommendation systems or ranking problemsExperience with prompt engineering, prompt chaining, and LLM fine-tuningKnowledge of vector databases and semantic search technologiesFamiliarity with A/B testing and experimental design3+ years of hands-on experience with Python, SQL, and modern ML frameworks (PyTorch, TensorFlow, scikit-learn)Proven track record in NLP and working with large language models (OpenAI, Anthropic, open-source LLMs)Experience with data engineering tools and cloud platforms (AWS, GCP)Strong background in entity resolution, data matching, or similar deduplication challengesBuilding and maintaining ontologiesBuilding datasets and evaluation pipelinesChoosing different methods based on tradeoffs of cost, latency, and accuracyStartup DNA:OpinionatedData drivenIntellectually curiousThrive in an environment where you experiment and move quicklyStrong sense of ownership; Can work autonomouslyWhy SquarePeg.ai? Growth opportunity: 50 customers in just 7 months—we're solving a real problem that the market desperately needsBacked by the Best: Top-tier investor support from Next Frontier Capital, Acadian Ventures, and othersDirect Impact: In a team of 12, your work directly shapes product direction and company successGround Floor Opportunity: Shape our technical foundation and product as we scaleCutting-Edge Tech: Work with the latest in AI/ML, from GPT5 to custom transformer architecturesReady to Reimagine Hiring? The job application process is broken—billions of hours wasted on mismatched applications, biased screening, and manual resume review. We're building the AI that fixes it. If you're excited about using your technical skills to create meaningful change in how people find their next opportunity, we want to hear from you. This role offers competitive salary, equity, comprehensive benefits, and the chance to be a key player in the future of work. Apply to this Job