Top Tech Jobs & Startup Jobs

Cinder is building a paid expert network for specialists who test AI models for safety risks. Projects may involve red teaming, jailbreak testing, image, video, audio, agentic, and MCP-connected systems. They seek experts in areas such as child safety, CBRNE, extremism, cybersecurity, fraud, self-harm, psychology, copyright, and multilingual or culturally specific model evaluation.

Build reinforcement learning systems from the ground up, including environments, reward functions, training pipelines, evaluation frameworks, and production systems. Train and fine-tune models using RL methods, scale training across GPU clusters, conduct experiments, and guide technical direction. The role also contributes to engineering culture and future hiring while working closely with company founders in an on-site early-stage environment.

Designs, supports, troubleshoots, and maintains telecommunications infrastructure for SpaceX facilities, launch systems, spacecraft support, and mission operations. Responsibilities include fiber and copper networks, telecom and RF systems, electrical power infrastructure, equipment installation, construction coordination, procurement, contractor management, and field technician support. The role requires hands-on work, extended hours, travel, and compliance with technical, safety, and aerospace access requirements.

Manages infrastructure capacity requests through case management systems, including triage, validation, routing, escalation, queue management, and closure. Maintains case records, capacity logs, budget trackers, and operational documentation. Uses Excel to reconcile data and produce reports on volumes, backlogs, timeliness, escalations, and accuracy. Coordinates with stakeholders, identifies recurring issues, and recommends process improvements while following established procedures and escalation guidelines.

Design, build, and evolve large-scale portfolio implementation systems covering risk controls through trade generation. Translate investment objectives into robust systematic logic, troubleshoot complex systems, streamline portfolio construction and trade delivery, and develop oversight and validation tools. The role also establishes engineering standards for maintainable systems and requires close collaboration with investment stakeholders. It is onsite four days per week in Westport, Connecticut.

Designs and maintains scalable enterprise data architectures and ETL/ELT pipelines on Microsoft Fabric and Azure. Responsibilities include developing Python-based data solutions, optimizing Fabric warehouses and lakehouses, implementing governance, security, lineage, monitoring, and CI/CD, and integrating diverse data sources. The role partners with data science, machine learning, business intelligence, engineering, and business teams to support analytics and model training while improving platform reliability, scalability, and cost efficiency.

Leads community communications for OpenAI products, developing culturally relevant narratives, earned-media opportunities, creator and journalist relationships, and community-driven stories. Connects campaigns and partnerships into sustained global narratives, surfaces authentic user experiences, develops pitches and channel content, and brings community feedback into product communications planning. The role requires strong editorial judgment, cultural fluency, storytelling, collaboration, organization, and an accurate understanding of AI’s possibilities and limitations.

Design, implement, and optimize custom GPU kernels for large-scale AI training and inference. Integrate low-level kernels into PyTorch, JAX, and internal runtimes; profile workloads, build performance models, remove bottlenecks, and collaborate across ML research, distributed systems, model serving, and hardware teams. The role also contributes to benchmarking, tooling, documentation, and testing for reliable kernel performance.

Build AI-native developer tools, spec-to-implementation workflows, code-generation systems, internal copilots, coding harnesses, sandboxes, authorization layers, and verification guardrails. Develop customer-facing AI functionality within a data-heavy enterprise SaaS platform, collaborate across engineering, product, and operations, and coach teams on safe AI-assisted development practices.

Provides senior-level desktop and end-user IT support in a military hospital environment. Installs, configures, maintains, and troubleshoots computer hardware, operating systems, applications, peripherals, and network access. Manages service tickets, user accounts, cybersecurity training compliance, technical documentation, equipment maintenance, and operational reporting. Supports military personnel transitions and collaborates with technical teams while following DoD security, IT service management, and compliance requirements.