LangChain tech stack
LangChain builds mostly with Python, JavaScript, TypeScript, Go. Its stack also includes Cloudflare, AWS, PostgreSQL, Redis. Cloudflare is named in 124 of the 124 job postings LangChain published in the last 12 months (100%). Counted by Alion from the job postings of LangChain, updated Sep 26, 2026.
What programming languages does LangChain use?
Python is named in 48% of job postings at LangChain, followed by JavaScript (29%), TypeScript (27%), Go (12%).
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What frameworks and libraries does LangChain use?
React.js is named in 7% of job postings at LangChain, followed by OpenTelemetry (4%), TRL (3%), Transformers (3%).
React.js
9 7%
OpenTelemetry
5 4%
TRL
4 3%
Transformers
4 3%
Unsloth
4 3%
Tailwind CSS
2 2%
FastAPI
1 1%
Next.js
1 1%
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What databases does LangChain use?
PostgreSQL is named in 12% of job postings at LangChain, followed by Redis (10%), ClickHouse (7%), BigQuery (2%).
BigQuery 
What cloud and platforms does LangChain use?
Cloudflare is named in 100% of job postings at LangChain, followed by AWS (33%), GCP (33%), Kubernetes (33%).
Cloudflare
124 100%
AWS
41 33%
GCP
41 33%
Kubernetes
41 33%
Azure
40 32%
Datadog
12 10%
Grafana
10 8%
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What developer tools does LangChain use?
Terraform is named in 10% of job postings at LangChain, followed by Helm (9%), Prometheus (9%), Rest API (6%).
Terraform
13 10%
Helm
11 9%
Prometheus
11 9%
Rest API
7 6%
Axolotl
4 3%
Babel
3 2%
Vite
3 2%
Webpack
3 2%
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What AI and ML technologies does LangChain use?
LLM is named in 52% of job postings at LangChain, followed by Claude (2%), ChatGPT (1%).
Which engineering practices does LangChain ask for?
AI Agents is named in 100% of job postings at LangChain, followed by LLM Guardrails (18%), RAG (12%), Platform Engineering (10%).
AI Agents
124 100%
RAG
15 12%
Platform Engineering
13 10%
CI/CD
10 8%
GitOps
8 6%
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What does each LangChain team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Sales
40 postingsSolutions
23 postingsBackend
13 postingsCustomer Success
8 postingsAI/ML
6 postingsHow does your stack fit LangChain?
How much does LangChain pay by technology?
Median stated pay of the postings that name each technology, against the median of all LangChain postings with stated pay: $240k across 14 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Cloudflare | 14 | $240k | 0% |
| LLM | 8 | $240k | 0% |
| TypeScript | 8 | $240k | 0% |
| Python | 6 | $245k | +2% |
| JavaScript | 5 | $240k | 0% |
How is the LangChain 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 LangChain stack?
LangChain scores 86 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: 3; legacy ones: 0.
How common is the LangChain stack in its industry?
Share of the 851 companies in the same industries, whose stack Alion knows, that use each technology.
What sets LangChain apart
LangChain products in its job postings
Postings at LangChain name its own products. They describe what the company makes, so they are left out of the stack above.
Companies with a stack like LangChain
Questions about the LangChain tech stack
What programming languages does LangChain use?
The languages named in LangChain job postings are Python (48%), JavaScript (29%), TypeScript (27%), Go (12%), SQL (3%), as a share of the 124 postings of the last 12 months.
Does LangChain use React.js?
Yes. React.js is named in 9 of 124 job postings (7%) and required in 7 of them.
What cloud and platforms does LangChain use?
The cloud and platforms named in LangChain job postings are Cloudflare (124), AWS (41), GCP (41) (postings in brackets).
What skills do you need for a Sales job at LangChain?
Sales postings at LangChain most often require Cloudflare (40), Replit (21), LLM (6), Python (3), out of 40 postings in the last 12 months.
Is the LangChain tech stack changing?
Yes. BigQuery, Google BigQuery, Axolotl, DPO first appeared in LangChain job postings in the last six months.
How modern is the LangChain tech stack?
LangChain scores 86 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: 3; legacy ones: 0.
How does Alion know the LangChain tech stack?
Alion reads every job posting LangChain publishes and tags the technologies each one names. The figures on this page count the 124 postings of the last 12 months and were updated on Sep 26, 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, "LangChain tech stack: 89 technologies from 124 job postings", as of Sep 26, 2026. https://alion.io/company/langchain/technologies