LangChain tech stack
LangChain builds mostly with Python, JavaScript, TypeScript, Go. Its stack also includes Cloudflare, AWS, PostgreSQL, Redis. Cloudflare is named in 152 of the 152 job postings LangChain published in the last 12 months (100%). Counted by Alion from the job postings of LangChain, updated Nov 11, 2026.
What programming languages does LangChain use?
Python is named in 43% of job postings at LangChain, followed by JavaScript (24%), TypeScript (23%), Go (11%).
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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
10 7%
OpenTelemetry
6 4%
TRL
4 3%
Transformers
4 3%
Unsloth
4 3%
Tailwind CSS
2 1%
FastAPI
1 1%
Next.js
1 1%
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What databases does LangChain use?
PostgreSQL is named in 11% of job postings at LangChain, followed by Redis (9%), ClickHouse (7%), Google BigQuery (2%).
What cloud and platforms does LangChain use?
Cloudflare is named in 100% of job postings at LangChain, followed by AWS (34%), GCP (31%), Azure (30%).
Cloudflare
152 100%
AWS
51 34%
GCP
47 31%
Azure
46 30%
Kubernetes
42 28%
Datadog
13 9%
Grafana
10 7%
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What developer tools does LangChain use?
Terraform is named in 9% of job postings at LangChain, followed by Helm (7%), Prometheus (7%), Rest API (4%).
Terraform
13 9%
Helm
11 7%
Prometheus
11 7%
Rest API
6 4%
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 45% of job postings at LangChain, followed by ChatGPT (2%), Claude (2%), Gemini (1%).
Which engineering practices does LangChain ask for?
AI Agents is named in 100% of job postings at LangChain, followed by LLM Guardrails (14%), RAG (10%), Platform Engineering (9%).
AI Agents
152 100%
RAG
15 10%
Platform Engineering
14 9%
CI/CD
10 7%
GitOps
8 5%
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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
49 postingsSolutions
24 postingsBackend
16 postingsCustomer Success
9 postingsLeadership
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 20 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Cloudflare | 20 | $240k | 0% |
| LLM | 9 | $240k | 0% |
| Python | 9 | $240k | 0% |
| TypeScript | 9 | $240k | 0% |
| PostgreSQL | 7 | $240k | 0% |
| Go | 7 | $240k | 0% |
| Redis | 7 | $240k | 0% |
| JavaScript | 6 | $238k | −1% |
| ClickHouse | 5 | $250k | +4% |
| React.js | 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 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: 4; legacy ones: 0.
How common is the LangChain stack in its industry?
Share of the 1,957 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 (43%), JavaScript (24%), TypeScript (23%), Go (11%), SQL (4%), as a share of the 152 postings of the last 12 months.
Does LangChain use React.js?
Yes. React.js is named in 10 of 152 job postings (7%) and required in 8 of them.
What cloud and platforms does LangChain use?
The cloud and platforms named in LangChain job postings are Cloudflare (152), AWS (51), GCP (47) (postings in brackets).
What skills do you need for a Sales job at LangChain?
Sales postings at LangChain most often require Cloudflare (49), Replit (20), AWS (5), LLM (4), out of 49 postings in the last 12 months.
Is the LangChain tech stack changing?
Yes. AWS Bedrock AgentCore, Google BigQuery, SLI/SLO/SLA, dbt first appeared in LangChain job postings in the last six months.
How modern is the LangChain tech stack?
LangChain 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: 4; 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 152 postings of the last 12 months and were updated on Nov 11, 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: 97 technologies from 152 job postings", as of Nov 11, 2026. https://alion.io/company/langchain/technologies