Slack tech stack
Slack builds mostly with Python, SQL, Scala, PHP. Its stack also includes Agentforce, AWS, React.js, Hadoop. Agentforce is named in 32 of the 32 job postings Slack published in the last 12 months (100%). Counted by Alion from the job postings of Slack, updated Sep 30, 2026.
What programming languages does Slack use?
Python is named in 31% of job postings at Slack, followed by SQL (22%), Scala (19%), PHP (19%).
Python
10 31%
SQL
7 22%
Scala
6 19%
PHP
6 19%
TypeScript
6 19%
Java
5 16%
JavaScript
5 16%
Kotlin
4 13%
Show all (13)
What frameworks and libraries does Slack use?
React.js is named in 16% of job postings at Slack, followed by Hadoop (16%), Jetpack Compose (13%), LangChain (6%).
React.js
5 16%
Hadoop
5 16%
Jetpack Compose
4 13%
LangChain
2 6%
LangGraph
2 6%
Vue.js
2 6%
JAX
1 3%
Show all (15)
What databases does Slack use?
Presto is named in 13% of job postings at Slack, followed by MySQL (6%), Snowflake (3%).
What cloud and platforms does Slack use?
Agentforce is named in 100% of job postings at Slack, followed by AWS (22%), Spark (19%), Airflow (16%).
AWS
7 22%
Spark
6 19%
Airflow
5 16%
Azure
2 6%
GCP
2 6%
Show all (17)
What developer tools does Slack use?
WebSockets is named in 9% of job postings at Slack, followed by Claude Code (6%), Cursor (6%), Terraform (3%).
WebSockets
3 9%
Claude Code
2 6%
Cursor
2 6%
Terraform
1 3%
Docker
1 3%
Nessus
1 3%
ONNX
1 3%
TensorRT
1 3%
Which engineering practices does Slack ask for?
AI Agents is named in 100% of job postings at Slack, followed by Machine Learning (9%), CI/CD (6%), Dimensional Modeling (6%).
AI Agents
32 100%
CI/CD
2 6%
SLI/SLO/SLA
2 6%
Dependency Injection
2 6%
Show all (21)
What other technologies does Slack use?
Swift Concurrency is named in 3% of job postings at Slack.
Swift Concurrency
1 3%
What does each Slack team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
10 postingsMobile
6 postingsData Science
5 postingsHow does your stack fit Slack?
How much does Slack pay by technology?
Median stated pay of the postings that name each technology, against the median of all Slack postings with stated pay: $314k across 25 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Agentforce | 25 | $314k | 0% |
| Python | 9 | $314k | 0% |
| AWS | 6 | $260k | −17% |
| Scala | 5 | $314k | 0% |
| Java | 5 | $314k | 0% |
| SQL | 5 | $260k | −17% |
| Spark | 5 | $260k | −17% |
How is the Slack 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 Slack stack?
Slack scores 77 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: 1; legacy ones: 0.
How common is the Slack stack in its industry?
Share of the 4,780 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Slack apart
Companies with a stack like Slack
Questions about the Slack tech stack
What programming languages does Slack use?
The languages named in Slack job postings are Python (31%), SQL (22%), Scala (19%), PHP (19%), TypeScript (19%), as a share of the 32 postings of the last 12 months.
Does Slack use React.js?
Yes. React.js is named in 5 of 32 job postings (16%) and required in 3 of them.
What cloud and platforms does Slack use?
The cloud and platforms named in Slack job postings are Agentforce (32), AWS (7), Spark (6) (postings in brackets).
What skills do you need for a Backend job at Slack?
Backend postings at Slack most often require Agentforce (10), AWS (3), PHP (3), Claude Code (2), out of 10 postings in the last 12 months.
Is the Slack tech stack changing?
Yes. Dependency Injection first appeared in Slack job postings in the last six months.
How modern is the Slack tech stack?
Slack scores 77 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: 1; legacy ones: 0.
How does Alion know the Slack tech stack?
Alion reads every job posting Slack publishes and tags the technologies each one names. The figures on this page count the 32 postings of the last 12 months and were updated on Sep 30, 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, "Slack tech stack: 79 technologies from 32 job postings", as of Sep 30, 2026. https://alion.io/company/slack/technologies