OpenTrain AI is seeking Scala AI Training Engineers for a part-time remote contract role to evaluate, refine, and write AI-generated Scala code, system designs, and technical explanations. Candidates must have production experience with Scala 2.13+ or Scala 3, deep JVM and distributed systems expertise, and at least C1 English proficiency. The role is open to applicants in 17 designated countries and requires 20+ hours per week.