Arena

Assistant Controller

8+ years in accounting at high-growth tech startups; GAAP, ASC 606, revenue recognition; CPA; ERP experience; Big 4 preferred; AI workflows experience.

Founding Abuse Engineer

Abuse Engineer

6+ years production software engineering; experience in trust & safety, anti-abuse, anti-fraud, or risk engineering; strong SQL; backend languages Node.js/TypeScript/Python/Go.

Senior Software Engineer, Product

Senior Software Engineer

4+ years in software engineering; experience building user-facing web apps across frontend, backend, and database; strong communication; proven shipping and iteration; product-focused engineering.

Data Scientist 

6+ years in data science/ML analytics or applied research; strong Python (Pandas, NumPy) and Spark; statistical modeling, causal inference, experimental design; ability to communicate insights.

GTM Engineer

Proficient in Python or JavaScript; experience building SaaS integrations via APIs; AI fluency; strong ownership; understands pipeline metrics and revenue operations.

Associate General Counsel, Commercial & IP

8+ years in IP and commercial transactions; JD; CA bar preferred; enterprise contracting; IP portfolio management; AI/ML familiarity.

Social Media Lead

5+ years in social media management, tech/startup experience, proven growth on X/LinkedIn/Reddit, excellent writing, ability to translate technical topics for broad audiences, independent work with cross-functional collaboration.

Product Solutions Engineer 

4+ years software engineering; TypeScript; modern web frameworks; experience with LLM APIs; cloud and CI/CD; frontend/backend; strong communication; customer-facing work.

Business Development Lead

10+ years in business development/sales; proven closer of seven-figure deals; AI fluency; strong pipeline management; strategic enterprise growth.

Analytics Engineer

3+ years in analytics engineering or data engineering; strong SQL; modern data warehouse experience; Airflow or similar; Python; data modeling expertise.

Technical Recruiter

10+ years full-cycle technical recruiting in deep-tech; strong sourcing/closing; translates business needs into hiring plans; collaborative and committed to inclusive hiring.

Senior Software Engineer, ML Infrastructure

5+ years in software engineering focusing on infrastructure or large-scale data and ML systems; distributed systems; low-latency, high-throughput; PyTorch experience preferred.

Senior Software Engineer, Full Stack

Senior Full-Stack Software Engineer

5+ years in software engineering; full-stack or backend product development; strong SQL and databases; testing practices; excellent communication and collaboration; bonus: Supabase or Vercel AI SDK experience.

Senior Software Engineer, Data Infrastructure

Software Engineer

5+ years software engineering with data engineering focus; SQL and Python; experience with data processing pipelines, Spark or Ray Data; able to build scalable data infrastructure.

Senior Product Security Engineer

8+ years in software or security engineering; staff-level security; threat modeling, secure architecture, production systems; backend development (Node.js, TypeScript, Python, Go); distributed systems security; strong cross-team communication.

Senior Infrastructure Engineer

8+ years backend/infrastructure or systems engineering; staff-level; distributed systems at scale; strong networking, observability, and collaboration with security and product engineering.

Machine Learning Scientist - Open Source Lead

Machine Learning Scientist

PhD or equivalent in ML/NLP or related field; experience training large-scale models; strong ML/statistics foundation; Python and ML libraries (PyTorch/JAX/TensorFlow) proficiency; ability to design experiments and publish/open-source contributions.

PhD or equivalent research experience; strong ML/NLP foundations; Python and ML libraries; experience with large-scale models and evaluation.

Machine Learning Engineer

Senior ML engineer with 4+ years of experience, strong programming across the stack, deep learning/LLMs, and data/eval pipeline expertise.

Title	Location	Date
Assistant Controller Full Time · 8+ YOE Bay Area, California, United States · Hybrid	Bay Area, California, United States Hybrid	Apr 28, 2026
Founding Abuse Engineer Full Time · 6+ YOE Bay Area, California, United States · Hybrid	Bay Area, California, United States Hybrid	Apr 22, 2026
Senior Software Engineer, Product Full Time · 4+ YOE United States · Hybrid	United States Hybrid	Apr 20, 2026
Data Scientist Full Time · 6+ YOE United States · Hybrid	United States Hybrid	Mar 19, 2026
GTM Engineer Full Time · $130K-$180K United States · Hybrid	United States Hybrid	Mar 19, 2026
Associate General Counsel, Commercial & IP Full Time · 8+ YOE California, United States · Hybrid	California, United States Hybrid	Mar 18, 2026
Social Media Lead Full Time · $140K-$200K · 5+ YOE United States · Hybrid	United States Hybrid	Feb 24, 2026
Product Solutions Engineer Full Time · 4+ YOE California, United States · Hybrid	California, United States Hybrid	Feb 23, 2026
Business Development Lead Full Time · $180K-$250K · 10+ YOE California, United States · Hybrid	California, United States Hybrid	Feb 23, 2026
Analytics Engineer Full Time · 3+ YOE United States · Hybrid	United States Hybrid	Feb 3, 2026
Technical Recruiter Full Time · 10+ YOE United States · Hybrid	United States Hybrid	Dec 18, 2025
Senior Software Engineer, ML Infrastructure Full Time · 5+ YOE United States · Hybrid	United States Hybrid	Dec 18, 2025
Senior Software Engineer, Full Stack Full Time · 5+ YOE California or United States · Hybrid	California or United States Hybrid	Dec 18, 2025
Senior Software Engineer, Data Infrastructure Full Time · 5+ YOE California or United States · Hybrid	California or United States Hybrid	Dec 18, 2025
Senior Product Security Engineer Full Time · $210K-$320K · 8+ YOE United States · Hybrid	United States Hybrid	Dec 18, 2025
Senior Infrastructure Engineer Full Time · 8+ YOE United States or California · Hybrid	United States or California Hybrid	Dec 18, 2025
Machine Learning Scientist - Open Source Lead Full Time United States · Hybrid	United States Hybrid	Dec 18, 2025
Machine Learning Scientist Full Time United States · Hybrid	United States Hybrid	Dec 18, 2025
Machine Learning Engineer Full Time · 4+ YOE California, United States · Hybrid	California, United States Hybrid	Dec 18, 2025

Activities	AI model benchmarkingCrowdsourced human preference evaluationLarge language model testingPerformance leaderboard hostingAI evaluation data licensing
Headquarters	US
Industries	Artificial IntelligenceSoftware
Name	Arena
Employees	75
Type	Private
Tagline	Benchmarks AI models using crowdsourced human preference evaluations.
Founded	2,025
Website	arena.ai
Latest Funding Round	Series A
Latest Funding Year	2,026
Latest Funding Amount	150,000,000
Latest Investors	FelicisUC Investments

Arena

About Arena