RUNREQ :: job/c214a481-1d23-845a-a0be-25b46633836b
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← ANTHROPIC JOB LEDGER

Software Engineer, Tokens and Prompt Structures

SAN FRANCISCO, CA | NEW YORK CITY, NY / AI RESEARCH & ENGINEERING / TYPE NOT LISTED

SOURCE STATEOPENAPPLY AT ANTHROPIC ↗
FIRST SEENSEP 16, 2026RUNREQ OBSERVATIONDAYS OPEN2855D COMPANY MEDIANTEAM OPEN66AI RESEARCH & ENGINEERING30D TEAM+7NEWLY OBSERVEDTRACKED COMP$320K–$405K /YRDISCLOSED RANGE / ALL TIERSSOURCEVERIFIEDCHECKED 10H AGO
JOB DESCRIPTIONSHORTENED FROM SOURCE

Key responsibilities

4 ITEMS
  • Maintain and improve encoding libraries used by engineers and researchers.
  • Design data structures and abstractions for encoded data and prompt structures.
  • Run experiments and adapt encoding libraries to support research and production.
  • Optimize encoding performance across systems that depend on these libraries.

Qualifications needed

4 ITEMS
  • Have a bachelor's degree or equivalent education, training, or experience in a relevant field, plus at least five years of software engineering experience.
  • Understand ML terminology and LLM architecture well enough to work with researchers and interpret experiment results.
  • Have experience completing complex refactors in large codebases.
  • Preferred: Experience with tokenizers, widely used libraries, performance optimization, Python, Rust, reinforcement learning, or model training infrastructure.
EVENT>Anthropic :: Software Engineer, Tokens and Prompt Structures first observed 28 days ago