Top Tech Jobs & Startup Jobs in Los Angeles, CA

Build, integrate, and stress-test full-stack applications and backend services that leverage advanced AI models. Develop production APIs, front-end features, databases, and cloud infrastructure; troubleshoot integrations; prototype rapidly and deliver high-quality code and documentation in fast-moving environments.

Provide senior-level legal expertise to design, evaluate, and benchmark AI systems for legal tasks. Review AI outputs, create task specifications and reference solutions, develop evaluation frameworks and scoring guidelines, and give structured feedback. Collaborate with researchers, engineers, and program teams to translate professional legal judgment into consistent evaluation standards.

Define rigorous evaluation standards and rubrics for character and facial performance-transfer technology. Curate benchmarks, evaluate subtle facial and body performance differences, document visual insights, and collaborate with specialists to shape consistent human-review processes. Provide expert feedback and help develop reviewer profiles and annotation workflows. Part-time, remote with monthly in-person sessions in Los Angeles or New York.

Build and maintain full-stack production applications and services that integrate frontier LLMs. Design, test, and stress-test systems, diagnose failures, prototype rapidly, and collaborate with engineering and research teams to deliver reliable, deployable software and evaluation tooling.

Evaluate and test complex AI benchmark tasks by designing test cases, executing tasks, debugging environments, reviewing grading logic, identifying shortcuts, and developing repeatable QA processes while collaborating with researchers to maintain rigorous quality standards.

Evaluate high-resolution images and video at the pixel level to detect subtle artifacts and ensure professional image fidelity. Develop evaluation guidelines, document observations for datasets, create test samples, and collaborate with experts to maintain consistent visual-quality standards across AI-generated and enhanced outputs.

Evaluate AI-generated enterprise sales workflows, create end-to-end benchmark sales scenarios, refine scoring rubrics, produce polished sales artifacts (pitches, proposals, communications), provide structured feedback, and apply professional judgment in realistic CRM and sales-stack sandbox environments.

Evaluate and strengthen AI model behavior on cybersecurity topics by writing expert prompts, annotating and grading model responses for accuracy and safety, and applying structured guidelines to classify sensitive content. Work part-time on AI safety tasks with emphasis on secure, responsible handling of dual-use information.

Remote, contract equity research role requiring at least 2 years' experience at top firms. Analyze and extract information from public SEC filings. Minimum 10 hours/week for at least four weeks. Independent-contractor engagement with weekly payments via Stripe or Wise. U.S./Canada-based applicants only; no H-1B or STEM OPT sponsorship.

Perform L3 network troubleshooting and RCA on production enterprise networks, review telemetry/logs/configs, label and annotate network behaviors for ML training, and help define schemas and data pipelines to support AI-driven infrastructure.