Code Training Data for LLM Fine-Tuning and Generation
Code generation models improve when they learn from organized problems, algorithms, and equivalent solutions across programming languages. InfoBay’s coding corpus supports code LLM fine-tuning, repository reasoning, and algorithm-aware copilots.
The problem
Code generation models plateau when their training data is dominated by whatever happens to be public on GitHub — inconsistent quality, duplicated solutions, and no reliable way to compare the same problem solved idiomatically across languages. Fine-tuning runs that lean entirely on public repository dumps tend to reproduce common bugs and stale patterns at the same rate they appear on GitHub, since nothing in the data distinguishes a correct, idiomatic solution from a merely popular one. InfoBay's coding corpus is organized by problem rather than by repository, giving code LLM teams cross-language parallel structure, algorithmic reasoning depth, and repository-history context that scraped code doesn't provide.
Corpus assets & provenance
Cross-language parallel solutions
+The corpus pairs 12K+ DSA problems with 64K+ solutions across 9 languages — Java, Python, C++, JavaScript, C#, PHP, and more — so the same problem can be studied in multiple languages side by side, supporting fine-tuning that targets algorithmic reasoning independent of any one language's syntax.
Beyond DSA: SQL, machine coding, and low-level design
+The coding collection extends past algorithm problems into SQL, machine coding, low-level design, and repository-history data, giving code generation and code-review models exposure to the kind of multi-file, real-world software engineering tasks that isolated coding-challenge datasets skip entirely. Machine coding and low-level design tasks in particular mirror the open-ended, multi-step engineering problems that appear in real interview and code-review workflows, rather than the single-function katas most public benchmarks rely on.
Legacy codebases for repository-level reasoning
+200+ legacy codebases and ~1.36B+ tokens support training on repository-level context — reading, refactoring, and reasoning across an existing codebase — rather than only generating a function from a prompt in isolation.
Curated, not GitHub-scraped
+InfoBay's coding corpus is collected via formal enterprise agreements, not web-scraped. Problems and solutions are organized by taxonomy and reviewed rather than pulled wholesale from public repositories, which matters for both license clarity and training-signal quality.
Why organized-by-problem beats scraped repositories
+Pre-training on scraped GitHub repositories teaches a model the statistical shape of code without a reliable way to compare correctness or style across implementations of the same task. Because InfoBay's DSA corpus is organized by problem rather than by repository, a code generation model can be shown the same task solved correctly in multiple languages and multiple valid styles, which supports both instruction tuning aimed at correctness and evaluation sets that check whether a generated solution is actually equivalent to a reference implementation — a distinction pure code-completion pre-training rarely provides on its own.
Specifications
| Corpus | Format | Volume | Languages | Provenance |
|---|---|---|---|---|
| DSA problems & solutions | JSONL per language + problem taxonomy JSON | 64K+ solutions / ~1.36B+ tokens | 9 languages | Curated, not GitHub-scraped |
| Legacy codebases | Repository snapshots + history metadata | 200+ codebases | Java, Python, C++, and JavaScript | Curated, licensed source |
| SQL / machine coding / LLD | JSONL, task-structured | 8K+ SQL and system-design problems | SQL + 9 general-purpose languages | Curated, not GitHub-scraped |
How an engagement works
- 1
Baseline on your target languages
Every engagement starts by measuring current code-generation accuracy on the languages and task types (DSA, SQL, LLD) your model needs to improve.
- 2
Scope problem set and language mix
Problems are scoped by difficulty, topic, and language coverage against the baseline's weak points, drawing on the full DSA and legacy-codebase catalog.
- 3
Deliver and re-measure
Data ships per-language in JSONL with problem taxonomy metadata; code-generation accuracy is re-measured against the original baseline after fine-tuning.
Answers for buyers
FAQ
How many programming languages does the coding corpus cover?+
9 languages, including Java, Python, C++, JavaScript, C#, PHP, with the same DSA problems solved in parallel across each.
Is the code scraped from GitHub?+
No. Problems and solutions are curated and organized by taxonomy rather than pulled from public repositories.
Does the corpus cover more than algorithm problems?+
Yes. It extends into SQL, machine coding, low-level design, and repository-history data for real-world software engineering tasks.
What are legacy codebases used for?+
200+ legacy codebases support repository-level reasoning — reading and refactoring existing code — rather than only isolated function generation.
How large is the token volume?+
Approximately ~1.36B+ tokens across the DSA and coding corpus.
Can this data be scoped to a single language or problem type?+
Yes. Language mix, problem difficulty, and task type (DSA, SQL, LLD) are scoped per engagement against your baseline.
Does the corpus support evaluation, not just training?+
Yes. Because problems are organized with reference solutions across languages, the same data can be used to build correctness-checking evaluation sets, not only instruction-tuning examples.
Next steps