81Un tech stack
81Un builds mostly with Python, C++, SQL, Java. Its stack also includes Linux, Transformers, AWS, Flink. Python is named in 15 of the 45 job postings 81Un published in the last 12 months (33%). Counted by Alion from the job postings of 81Un, updated Oct 16, 2026.
What programming languages does 81Un use?
Python is named in 33% of job postings at 81Un, followed by C++ (18%), SQL (11%), Java (7%).
C++ 
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What frameworks and libraries does 81Un use?
Transformers is named in 16% of job postings at 81Un, followed by Flink (11%), Hadoop (7%), PyTorch (7%).
Transformers
7 16%
Flink
5 11%
Hadoop
3 7%
PyTorch
3 7%
TensorFlow
3 7%
DeepSpeed
2 4%
FastAPI
2 4%
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What databases does 81Un use?
Milvus is named in 4% of job postings at 81Un, followed by MySQL (4%), Qdrant (4%), HBase (2%).
What cloud and platforms does 81Un use?
Linux is named in 18% of job postings at 81Un, followed by AWS (11%), Spark (9%), Apache Kafka (7%).
AWS
5 11%
Spark
4 9%
Apache Kafka
3 7%
Kubernetes
3 7%
vLLM
3 7%
.NET
2 4%
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What developer tools does 81Un use?
Docker is named in 11% of job postings at 81Un, followed by Azure Data Factory (4%), Git (4%), Informatica (4%).
Docker
5 11%
Git
2 4%
OrCAD
2 4%
SLURM
2 4%
TensorRT
2 4%
AutoCAD
1 2%
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What AI and ML technologies does 81Un use?
LLM is named in 11% of job postings at 81Un, followed by ChatGPT (2%), LoRA (2%), VLM (2%).
Which engineering practices does 81Un ask for?
RAG is named in 11% of job postings at 81Un, followed by TCP/IP (9%), BGP (7%), Function Calling (7%).
RAG
5 11%
Function Calling
3 7%
AI Agents
2 4%
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What does each 81Un team work with?
The technologies each team's postings require most often, with the number of postings that require them.
AI/ML
10 postingsBackend
6 postingsData Science
4 postingsEarly Careers
3 postingsHow does your stack fit 81Un?
How is the 81Un stack changing?
Read from the dates of the postings themselves: a technology is new when the first posting that names it appeared in the last six months, rising or falling when its share of postings moved between the last two quarters.
How modern is the 81Un stack?
81Un scores 84 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: 5; legacy ones: 0.
How common is the 81Un stack in its industry?
Share of the 2,235 companies in the same industries, whose stack Alion knows, that use each technology.
What sets 81Un apart
Companies with a stack like 81Un
Questions about the 81Un tech stack
What programming languages does 81Un use?
The languages named in 81Un job postings are Python (33%), C++ (18%), SQL (11%), Java (7%), Node JS (4%), as a share of the 45 postings of the last 12 months.
Does 81Un use Transformers?
Yes. Transformers is named in 7 of 45 job postings (16%) and required in 7 of them.
What cloud and platforms does 81Un use?
The cloud and platforms named in 81Un job postings are Linux (8), AWS (5), Spark (4) (postings in brackets).
What skills do you need for a AI/ML job at 81Un?
AI/ML postings at 81Un most often require Python (7), Transformers (5), LLM (4), Linux (4), out of 10 postings in the last 12 months.
Is the 81Un tech stack changing?
Yes. CUDA, CUDA Toolkit, KV Cache, SGLang first appeared in 81Un job postings in the last six months.
How modern is the 81Un tech stack?
81Un scores 84 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: 5; legacy ones: 0.
How does Alion know the 81Un tech stack?
Alion reads every job posting 81Un publishes and tags the technologies each one names. The figures on this page count the 45 postings of the last 12 months and were updated on Oct 16, 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, "81Un tech stack: 102 technologies from 45 job postings", as of Oct 16, 2026. https://alion.io/company/81un/technologies