Machine Learning Engineer — AI Safety & Assurance

Location: San Jose, United States; fully in-person schedule up to 5 days a week

Salary: $136,800–$359,720 annually

Company

hirify.global operates data privacy, cybersecurity, trust and safety, and AI governance infrastructure for TikTok’s U.S. apps, user data, and recommendation systems.

What you will do

• Build automated safety evaluation engines for LLM and recommendation model outputs.
• Develop monitoring frameworks to identify adversarial vulnerabilities, bias, toxicity, misinformation, and other model risks.
• Architect governance-as-code metadata frameworks and control planes for ML pipelines, training data, and model weights.
• Create low-latency safety filters and circuit breakers for real-time recommendation streams.
• Build observability and lineage platforms that make model decisions and algorithmic promotions traceable, auditable, and compliant.

Requirements

• Bachelor’s or Master’s degree in Computer Science, Machine Learning, or a related technical field.
• At least 2 years of production-level software development experience with Go, Python, or C++.
• Experience with distributed systems and high-volume ML data pipelines such as Spark, Flink, or Kafka.
• Strong foundations in data structures, algorithms, and machine learning, including deep learning, optimization, and evaluation metrics.

Nice to have

• Experience in AI alignment, model interpretability, explainable AI, or adversarial machine learning.
• Familiarity with LLM evaluation frameworks, safety fine-tuning, RLHF, DPO, or prompt-injection defense.
• Knowledge of content recommendation systems, including two-tower models, deep ranking, or reinforcement learning.
• Experience with Go for high-performance backend infrastructure and Python/PyTorch for ML modeling and research.
• Ability to translate legal and safety policies into scalable technical implementations.

Culture & Benefits

• On-site collaboration focused on speed, alignment, team development, and integrated execution.
• Medical, dental, and vision insurance from day one.
• 401(k) savings plan with company match, paid parental leave, disability coverage, and life insurance.
• Wellbeing benefits, 10 paid holidays, 10 paid sick days, and 17 days of paid personal time.
• Inclusive workplace with reasonable accommodations available during recruitment.