Programming Languages in AI Training

Method and definitions

The public job boards of the AI training platforms this site tracks, read every day. Languages are read from role titles on every platform, and from the full descriptions of the roles whose job board publishes one. Every figure is computed by one database query over the window shown, the same query for the live report and for every edition. Each figure states its sample beneath it.

Language named

A role names a language when its title does, or, at the platforms that publish a full description, when its description does. Matching is on whole words, case-insensitive, with the documented pattern of each language. A role naming several languages counts for each; descriptions often list several accepted languages.

Names that are also words

Go, C, R, Swift, Rust, Ruby, Dart, Julia and Lean count only in a programming context: an explicit phrase ('Golang', 'C/C++', 'R programming', 'Lean 4', 'iOS/Swift'), a list beside another language ('Java, Go, Rust', 'Python or R'), or the head of a title before a role word ('Go Code Review Developer'). The bare name counts only written with its capital, so the verb 'go' and 'lean manufacturing' never do.

Coding role

A role this site classifies as Coding & Software Evaluation, one of the twelve kinds of AI training work. Languages named in other kinds of work (Math & STEM, AI evaluation, agentic tasks) are counted separately.

Pay by language

The median hourly rate advertised by the roles naming a language, of any kind of work. A median needs 8 roles stating a rate, and is ranked only when those roles come from at least 2 platforms; a median resting on one platform is shown, marked, and not ranked.

Framework or tool

A library, framework, cloud, infrastructure or developer tool named in a description (React, PyTorch, Kubernetes, AWS, Git), each with a documented pattern; words shared with other fields ('angular momentum', a laboratory flask) count only in a software context.

Coverage

Titles are read on every platform; full descriptions only where the job board publishes them (Mercor, micro1, AfterQuery and Braintrust, about three in ten open roles). Each figure states which it reads.

Open role

A role listed by a given day and still in its platform's feed that day.

Kind of work

Each role is classified from its title and description into one of the twelve kinds of AI training work this site tracks, from AI evaluation and coding to multilingual and audio work. Every kind links to its own page.

Window

Live: the last 28 complete days, in UTC. Edition: one calendar month, in UTC.

What this data cannot tell you

• Platforms that recruit without a public job board are not counted. Several large ones invite workers to projects directly.
• A listing is not a hire. Some platforms keep evergreen roles open for months, and some post one listing per language or country.
• Descriptions are read only for the platforms that publish them, which are expert networks: description figures lean towards expert and senior work, and coding roles elsewhere are read from their titles alone, so many name no language.
• Roles listing several accepted languages carry one rate for all of them, so the pay of languages named together differs less than the table suggests; a mention may be a preference rather than a requirement.
• The coding kind of work also holds some engineering roles outside software (CAD, hardware, audio engineering), which name no programming language.
• A pattern can miss a language written in an unusual way; nothing is inferred beyond what the text says (an 'iOS' or 'Android' title names a platform, not a language).

How the job feeds are read and roles are classified: site methodology. How fresh, complete and consistent the data is, checked every day: data quality and coverage.

Editions

The live report covers the last 28 complete days and changes every day. Each complete month is also published as an edition, frozen two days after the month ends, so a figure you cite from an edition never moves.

• Live data (this page)Last 28 complete days, recomputed daily

Cite and reuse

Free to quote, chart and republish under CC BY 4.0 with a link to this page. Live figures change daily: cite a monthly edition for numbers that will read the same later, or keep the access date.

@misc{aitrainingjobs_programming_languages_in_ai_training_live,
  author = {{AITraining.jobs}},
  title = {Programming Languages in AI Training (live data, 21 Sep 2026 to 18 Oct 2026)},
  year = {2026},
  howpublished = {\url{https://aitraining.run/research/programming-languages-in-ai-training}},
  note = {Accessed 19 Oct 2026},
}

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