JOBSEARCHER

Senior Software Engineer Contract

HaystackDenver, COL5 SeniorOctober 30th, 2026
About the Company: A leading AGI infrastructure company working with frontier AI labs to accelerate model development through high-quality training data, evaluations, and engineering talent.
About the Role: We're looking for a high-taste engineer with a strong eye for quality. The ideal candidate will have hands-on experience with preference data and rubric creation, understanding what separates a good example from a great one. You'll communicate clearly and be able to synthesise complex technical work in a concise, structured, and actionable way. You'll be comfortable working in ambiguous, fast-moving environments and have a bias towards shipping over deliberating. What Does Day-to-Day Look Like? Design, refine, and iterate on rubrics and evaluation criteria for preference data. Review and label data to a high standard, identifying subtle issues others might miss. Build and maintain pipelines and infrastructure supporting data generation, collection, and evaluation workflows. Synthesise findings from data work into clear write-ups, updates, and recommendations. Collaborate closely with researchers and engineers to translate qualitative judgement into scalable processes.
Required Skills: 5+ years of proficiency in Python, particularly building and maintaining pipelines and infrastructure, or TypeScript. Experience contributing to or navigating large codebases, such as VS Code, is a plus. Hands-on experience with preference data collection and/or rubric creation. Strong written and verbal communication skills, with the ability to distil technical work into clear, actionable summaries. Demonstrated high-quality judgement, with the ability to articulate why something is good, not just that it is.
Perks of the Contract: Fully remote working environment. Opportunity to work on cutting-edge AI projects with leading LLM companies.