Handshake

Build frontier-model post-training systems at Handshake Labs, combining research insight with production-quality software, evaluations, data pipelines, and reusable platforms. This high-ownership role partners with researchers, domain experts, and customers to improve AI systems and productize successful approaches.

Handshake Labs is hiring a high-ownership Member of Technical Staff to build post-training systems, evaluations, data pipelines, and reusable platforms for frontier AI models. The role combines research judgment with hands-on machine learning engineering across fine-tuning, reinforcement learning, evaluation, and productization.

Handshake is hiring a Senior Software Engineer to build backend services, platform capabilities, and developer tooling for Handshake AI and internal LLM-powered initiatives. The role combines deep backend and data-system work with practical agentic systems experience.

Senior Forward Deployed Engineer embedded with enterprise customers to build, deploy, and improve production-grade AI agents that solve high-impact business problems. The role combines deep customer partnership, full-stack engineering, evaluation design, and domain expertise, with five days per week in Handshake’s San Francisco office.

Senior Forward Deployed Engineer responsible for designing and delivering tailored, production-grade software solutions for complex customer needs. The role combines hands-on full-stack engineering, architectural ownership, deployment scalability, and technical mentorship from Handshake’s Sofia office.

Software Engineer I on Handshake’s Quality team, building backend infrastructure that evaluates and improves the quality of data and AI evaluations delivered to frontier AI labs. The role combines real-time quality checks, data pipelines, APIs, and measurement systems in a five-days-per-week San Francisco office.

Senior Software Engineer building scalable consumer products that connect millions of students with employers. The role combines distributed-systems engineering, technical leadership, and mentorship to improve a high-growth career platform.

Build and deploy production-grade AI agents directly within enterprise customer environments, owning solutions from definition through evaluation and iteration. This forward-deployed role combines full-stack engineering, customer collaboration, and deep domain expertise to deliver measurable operational impact.