Character.AI tech stack
Character.AI builds mostly with Python, Go, Java, TypeScript. Its stack also includes Kubernetes, AWS, PyTorch, React Native. Kubernetes is named in 5 of the 10 job postings Character.AI published in the last 12 months (50%). Counted by Alion from the job postings of Character.AI, updated Sep 28, 2026.
What programming languages does Character.AI use?
Python is named in 40% of job postings at Character.AI, followed by Go (30%), Java (20%), TypeScript (20%).
What frameworks and libraries does Character.AI use?
PyTorch is named in 20% of job postings at Character.AI, followed by React Native (20%), Tailwind CSS (20%), React.js (20%).
PyTorch
2 20%
React Native
2 20%
Tailwind CSS
2 20%
React.js
2 20%
DeepSpeed
1 10%
TensorFlow
1 10%
What databases does Character.AI use?
MySQL is named in 10% of job postings at Character.AI, followed by PostgreSQL (10%).
MySQL
1 10%
PostgreSQL
1 10%
What cloud and platforms does Character.AI use?
Kubernetes is named in 50% of job postings at Character.AI, followed by AWS (20%), Azure (20%), GCP (20%).
What developer tools does Character.AI use?
Docker is named in 50% of job postings at Character.AI, followed by GraphQL (10%), Rest API (10%), TPU (10%).
What AI and ML technologies does Character.AI use?
ControlNet is named in 10% of job postings at Character.AI, followed by Gemini (10%), LLM (10%), LoRA (10%).
Which engineering practices does Character.AI ask for?
A/B Testing is named in 40% of job postings at Character.AI, followed by Machine Learning (40%), RLHF (30%), Fine-tuning (20%).
RLHF
3 30%
Fine-tuning
2 20%
Reinforcement Learning
2 20%
CI/CD
2 20%
Show all (20)
What does each Character.AI team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
3 postingsHow does your stack fit Character.AI?
How is the Character.AI 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 Character.AI stack?
Character.AI scores 85 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: 7; legacy ones: 0.
How common is the Character.AI stack in its industry?
Share of the 559 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Character.AI
Questions about the Character.AI tech stack
What programming languages does Character.AI use?
The languages named in Character.AI job postings are Python (40%), Go (30%), Java (20%), TypeScript (20%), JavaScript (20%), as a share of the 10 postings of the last 12 months.
Does Character.AI use PyTorch?
Yes. PyTorch is named in 2 of 10 job postings (20%) and required in 2 of them.
What cloud and platforms does Character.AI use?
The cloud and platforms named in Character.AI job postings are Kubernetes (5), AWS (2), Azure (2) (postings in brackets).
What skills do you need for a Backend job at Character.AI?
Backend postings at Character.AI most often require Go (2), Python (2), React Native (2), Tailwind CSS (2), out of 3 postings in the last 12 months.
Is the Character.AI tech stack changing?
Yes. SFT first appeared in Character.AI job postings in the last six months.
How modern is the Character.AI tech stack?
Character.AI scores 85 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: 7; legacy ones: 0.
How does Alion know the Character.AI tech stack?
Alion reads every job posting Character.AI publishes and tags the technologies each one names. The figures on this page count the 10 postings of the last 12 months and were updated on Sep 28, 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, "Character.AI tech stack: 55 technologies from 10 job postings", as of Sep 28, 2026. https://alion.io/company/character-ai/technologies