Fathom tech stack
Fathom builds mostly with Go, Ruby, Python, C. Its stack also includes GCP, Google GKE, ClickHouse, Redis. Go is named in 2 of the 3 job postings Fathom published in the last 12 months (67%). Counted by Alion from the job postings of Fathom, updated Oct 12, 2026.
What programming languages does Fathom use?
Go is named in 67% of job postings at Fathom, followed by Ruby (67%), Python (33%), C (33%).
What frameworks and libraries does Fathom use?
CUDA is named in 33% of job postings at Fathom, followed by PyTorch (33%), Ray (33%), Ray Serve (33%).
torchtune 
What databases does Fathom use?
ClickHouse is named in 33% of job postings at Fathom, followed by Redis (33%).
ClickHouse
1 33%
Redis
1 33%
What cloud and platforms does Fathom use?
GCP is named in 67% of job postings at Fathom, followed by Google GKE (67%), Kubernetes (67%), CUDA Toolkit (33%).
GCP
2 67%
Google GKE
2 67%
Kubernetes
2 67%
CUDA Toolkit
1 33%
GitHub
1 33%
vLLM
1 33%
GitHub Actions
1 33%
What developer tools does Fathom use?
Axolotl is named in 33% of job postings at Fathom, followed by TensorRT (33%), ArgoCD (33%), Docker (33%).
What AI and ML technologies does Fathom use?
LLM is named in 33% of job postings at Fathom, followed by LoRA (33%), PEFT (33%), QLoRA (33%).
Which engineering practices does Fathom ask for?
DPO is named in 33% of job postings at Fathom, followed by Fine-tuning (33%), GitOps (33%), KV Cache (33%).
Fine-tuning
1 33%
GitOps
1 33%
Multimodal AI
1 33%
Prompt Engineering
1 33%
Quantization
1 33%
Show all (10)
How does your stack fit Fathom?
How modern is the Fathom stack?
Fathom scores 87 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 4; legacy ones: 0.
How common is the Fathom stack in its industry?
Share of the 1,183 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Fathom
Questions about the Fathom tech stack
What programming languages does Fathom use?
The languages named in Fathom job postings are Go (67%), Ruby (67%), Python (33%), C (33%), as a share of the 3 postings of the last 12 months.
Does Fathom use GCP?
Yes. GCP is named in 2 of 3 job postings (67%) and required in 1 of them.
What cloud and platforms does Fathom use?
The cloud and platforms named in Fathom job postings are GCP (2), Google GKE (2), Kubernetes (2) (postings in brackets).
Is the Fathom tech stack changing?
No new technology has appeared in Fathom job postings in the last six months.
How modern is the Fathom tech stack?
Fathom scores 87 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 4; legacy ones: 0.
How does Alion know the Fathom tech stack?
Alion reads every job posting Fathom publishes and tags the technologies each one names. The figures on this page count the 3 postings of the last 12 months and were updated on Oct 12, 2026.
Method and citation
Alion reads every job posting the company publishes and tags the technologies each one names. Shares count the postings of the last 12 months, open and closed; the company's own products are counted apart. How we count
Alion, "Fathom tech stack: 41 technologies from 3 job postings", as of Oct 12, 2026. https://alion.io/company/fathom/technologies