Top Tech Jobs & Startup Jobs

Build, own, and improve the evals platform that measures model capabilities and behaviors. Design datasets and grading schemes, manage execution infrastructure, diagnose failures, and deliver robust tools engineers use to clean data, provide experiment feedback, and track model growth.

Lead negotiations for high-value enterprise, partnership, hyperscaler, technology, and vendor agreements involving AI products and services. Advise senior business leaders on deal structure, risk, and non-standard terms; establish negotiation playbooks and escalation paths; develop legal processes that support sales; and mentor junior counsel. The role requires substantial commercial transactions experience, legal licensure or in-house eligibility, and five-day office attendance.

Conduct threat investigations into platform manipulation, account compromise, influence operations, fraud, and other policy violations. Design and execute large-scale enforcement sweeps, communicate findings to stakeholders, partner with engineering/product/policy teams, and coordinate with external parties, including law enforcement, while handling urgent incidents and on-call rotations.

Build and improve the X iOS app, delivering intuitive, high-performance user experiences and complex features end to end. Responsibilities include technical and product decision-making, pixel-perfect UI development, performance optimization, quality ownership, A/B testing, issue resolution, and collaboration with design, backend, Android, and web teams. The role also involves integrating APIs and AI model outputs and deploying scalable features to the App Store.

Build high-performance Android experiences for a large-scale AI application. Responsibilities include developing intuitive mobile interfaces, optimizing animations and performance, making technical and product decisions, collaborating across engineering and design teams, running A/B tests, using analytics to guide improvements, and owning products from concept through release.

Build and optimize large-scale GPU supercomputers and infrastructure for AI training and inference. Develop high-performance CUDA kernels using CUTLASS and Tensor Cores, profile systems with Nsight, and eliminate bottlenecks across GPU memory, networking, filesystems, and multi-GPU operations. Collaborate with AI research teams to deliver scalable, production-grade compute performance.

Designs and optimizes large-scale model-serving infrastructure for Grok, including distributed systems, batching, caching, load balancing, autoscaling, GPU kernels, quantization, speculative decoding, benchmarking, reliability, and CI/CD. The role improves inference latency and throughput while supporting high-concurrency production workloads serving millions of users.

Owns end-to-end planning and execution of VIP, customer, third-party, and special events. Responsibilities include vendor sourcing, agendas, registration, executive communication, onsite management, creative event branding, budgeting, logistics, inventory, gifting, and administrative process automation using AI. The role partners with Growth, Sales, Community, Developer Relations, Merchandising, and security teams to expand enterprise awareness and deliver high-quality customer experiences. Frequent travel, extended hours, weekends, and background checks for Air Force and NASA installation access are required.

Source and engage passive candidates for machine learning, software engineering, infrastructure, product, and business operations roles. Build talent pipelines, conduct intake with hiring managers, create personalized outreach, qualify candidates, maintain ATS records, track pipeline metrics, map competitor talent markets, and provide market insights. The role requires strong communication, technical sourcing skills, urgency, and full-time onsite work in Memphis, Tennessee.

Investigates and resolves customer disputes across P2P, debit and credit card, and ACH transactions. Manages chargebacks, provisional credits, representments, evidence submissions, regulatory deadlines, and customer communications. Maintains audit-ready case documentation, collaborates with Fraud and Compliance teams, supports audits and quality reviews, and identifies dispute trends for process improvement.