Services

What we do

End-to-end data structuring for LLM fine-tuning, pre-training, evaluation and RAG pipelines.

01 — JSONL Dataset Creation

Training data your model can actually learn from

We design, build and validate JSONL datasets for fine-tuning. Every dataset is schema-matched to your model architecture, with format, quality filters and annotation tailored to your use case.

instruction-tuning DPO pairs RLHF chat format completion
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1

Schema design

We define the exact JSON structure needed for your training framework — OpenAI, HuggingFace, Axolotl, etc.

2

Data transformation

Raw inputs are converted, cleaned and formatted into the agreed schema with deduplication and normalisation.

3

Quality validation

Every row is validated against the schema. A quality score is assigned and flagged rows are reviewed manually.

4

Delivery with data card

Final JSONL file + data card + stats report + sample validation set.

02 — Parquet Conversion

Large-scale datasets, columnar and fast

We convert large raw datasets into schema-optimised Parquet files ready for ingestion via Hugging Face Datasets, Apache Spark, S3, BigQuery or any other columnar data store.

pre-training columnar HuggingFace Spark
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Output formats we deliver

.parquetcolumnar, compressed
.jsonlnewline-delimited JSON
.arrowApache Arrow IPC
.csvon request
HF Datasetpush_to_hub ready
Customyour schema
03 — Data Cleaning and QA

Clean data is the foundation of every good model

We run your raw corpus through a full cleaning pipeline: deduplication, language detection, normalisation, PII scrubbing, toxicity filtering, and quality scoring. You get a clean, audited dataset with a full report.

deduplication PII removal language filter quality score toxicity filter
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Duplicate rows removed 12.4%
PII instances scrubbed 847
Low quality rows filtered 3.1%
Final quality score 0.97 / 1.00
04 — Evaluation Datasets

Know if your model is actually getting better

We build held-out evaluation and benchmark sets with human-verified ground truth labels, designed to expose model weaknesses and track fine-tuning progress across training runs.

benchmarks human labels held-out sets annotator agreement
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1

Task definition

We work with you to define evaluation dimensions, scoring rubrics and edge case coverage.

2

Human annotation

Labels are created and verified by human reviewers with inter-annotator agreement scoring.

3

Benchmark delivery

Eval set in JSONL + Parquet + scoring script. Ready to plug into your eval harness.

05 — RAG Chunking

Retrieval data that actually retrieves

We segment, chunk and enrich documents for Retrieval-Augmented Generation pipelines. Chunking strategy, overlap settings and metadata enrichment are all tuned to your vector database and embedding model.

RAG embeddings chunking metadata vector DB ready
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"chunk_id": "doc_42_chunk_7",
"text": "The transformer architecture...",
"tokens": 256,
"overlap": 32,
"source_page": 14

Compatible with Pinecone, Weaviate, Qdrant, pgvector, Chroma and more.

06 — Custom Pipelines

Recurring pipelines built around your workflow

For teams with ongoing data needs, we build repeatable batch processing pipelines — weekly jobs, format converters, annotation tooling and automated QA reporting — that run without intervention.

recurring jobs automation annotation tooling QA reports
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Weekly batch · runs every Monday 02:00 UTC
Auto QA report delivered by email
2 rows flagged for manual review
48,291 rows delivered · avg score 0.97
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Not sure which service you need?

Describe your data and your goal. We'll tell you exactly what to do with it.

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