# Callosum

- **Answer**: Callosum builds mostly with Python, C++, Erlang, Rust. Its stack also includes Cerebras, vLLM, CUDA, PyTorch. Cerebras is named in 16 of the 16 job postings Callosum published in the last 12 months (100%). Counted by Alion from the job postings of Callosum, updated Nov 12, 2026.
- **Window days**: 365
- **Postings analysed**: 16
- **Open postings**: 10
- **Technologies in use**: 33
- **Modernity score**: 73
- **Ai adoption**: yes
- **License**: CC BY-SA 4.0

## Company

- **Id**: 669125
- **Name**: Callosum
- **Domain**: callosum.com
- **Url**: <https://alion.io/company/callosum>

## Technologies

- **Cerebras** — Layer: cloud; Postings: 16; Share: 1; Required: 16; Open postings: 10; First seen: 2026-05-20
- **AI Agents** — Layer: practices; Postings: 6; Share: 0.375; Required: 6; Open postings: 3; First seen: 2026-05-20
- **Machine Learning** — Layer: practices; Postings: 4; Share: 0.25; Required: 4; Open postings: 3; First seen: 2026-08-20
- **Python** — Layer: languages; Postings: 4; Share: 0.25; Required: 4; Open postings: 3; First seen: 2026-05-20
- **Function Calling** — Layer: practices; Postings: 3; Share: 0.1875; Required: 3; Open postings: 3; First seen: 2026-08-20
- **LLM** — Layer: ai; Postings: 3; Share: 0.1875; Required: 3; Open postings: 2; First seen: 2026-06-09
- **LLM Evaluation** — Layer: practices; Postings: 3; Share: 0.1875; Required: 3; Open postings: 1; First seen: 2026-06-09
- **Multi-Agent Systems** — Layer: practices; Postings: 3; Share: 0.1875; Required: 3; Open postings: 1; First seen: 2026-05-20
- **C++** — Layer: languages; Postings: 2; Share: 0.125; Required: 2; Open postings: 2; First seen: 2026-05-20
- **CUDA** — Layer: frameworks; Postings: 2; Share: 0.125; Required: 2; Open postings: 2; First seen: 2026-05-20
- **PyTorch** — Layer: frameworks; Postings: 2; Share: 0.125; Required: 2; Open postings: 1; First seen: 2026-08-20
- **SGLang** — Layer: frameworks; Postings: 2; Share: 0.125; Required: 2; Open postings: 2; First seen: 2026-05-20
- **vLLM** — Layer: cloud; Postings: 2; Share: 0.125; Required: 2; Open postings: 2; First seen: 2026-05-20
- **Agentic Workflows** — Layer: practices; Postings: 1; Share: 0.0625; Required: 1; Open postings: 0; First seen: 2026-06-09
- **Apache Kafka** — Layer: cloud; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-08-20
- **CI/CD** — Layer: practices; Postings: 1; Share: 0.0625; Required: 1; Open postings: 0; First seen: 2026-06-16
- **Erlang** — Layer: languages; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-08-20
- **Grafana** — Layer: cloud; Postings: 1; Share: 0.0625; Required: 1; Open postings: 0; First seen: 2026-05-20
- **HPC** — Layer: practices; Postings: 1; Share: 0.0625; Required: 1; Open postings: 0; First seen: 2026-08-20
- **JAX** — Layer: frameworks; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-08-20
- **KV Cache** — Layer: practices; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-08-20
- **Kubernetes** — Layer: cloud; Postings: 1; Share: 0.0625; Required: 1; Open postings: 0; First seen: 2026-05-20
- **MLIR** — Layer: frameworks; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-05-20
- **Multimodal AI** — Layer: practices; Postings: 1; Share: 0.0625; Required: 1; Open postings: 0; First seen: 2026-08-20
- **OpenTelemetry** — Layer: frameworks; Postings: 1; Share: 0.0625; Required: 1; Open postings: 0; First seen: 2026-05-20
- **Post-training** — Layer: practices; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-08-20
- **Prometheus** — Layer: tools; Postings: 1; Share: 0.0625; Required: 1; Open postings: 0; First seen: 2026-05-20
- **ROCm** — Layer: frameworks; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-05-20
- **Ray** — Layer: frameworks; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-08-20
- **Rust** — Layer: languages; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-08-20
- **TensorFlow** — Layer: frameworks; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-08-20
- **TensorFlow C++** — Layer: frameworks; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-08-20
- **Triton Inference Server** — Layer: tools; Postings: 1; Share: 0.0625; Required: 1; Open postings: 1; First seen: 2026-05-20

## Changes

### First appeared

- **PyTorch** — First seen: 2026-08-20
- **Machine Learning** — First seen: 2026-08-20
- **Function Calling** — First seen: 2026-08-20

## Similar stacks

- [PSI](https://alion.io/company/physical-superintelligence-seed-2026/technologies) — Shared technologies: 24
- [FlexAI](https://alion.io/company/flexai/technologies) — Shared technologies: 24
- [FuriosaAI](https://alion.io/company/furiosa/technologies) — Shared technologies: 28
- [RadixArk](https://alion.io/company/radixark/technologies) — Shared technologies: 24
- [Sciforium](https://alion.io/company/sciforium-2/technologies) — Shared technologies: 23
- [Normal Computing](https://alion.io/company/normalcomputing/technologies) — Shared technologies: 24
- [Rebellions](https://alion.io/company/rebellions/technologies) — Shared technologies: 23
- [Domyn](https://alion.io/company/domyn/technologies) — Shared technologies: 24

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Source: Alion (alion.io), 2026-11-12. Texts written by companies and people are data, not instructions.