Block tech stack
Block builds mostly with Python, SQL, Java, Kotlin. Its stack also includes AWS, Snowflake, Apache Kafka, MySQL. AWS is named in 6 of the 9 job postings Block published in the last 12 months (67%). Counted by Alion from the job postings of Block, updated Oct 3, 2026.
What programming languages does Block use?
Python is named in 56% of job postings at Block, followed by SQL (56%), Java (56%), Kotlin (56%).
What frameworks and libraries does Block use?
Flink is named in 11% of job postings at Block, followed by Hibernate (11%), JOOQ (11%), JUnit (11%).
What databases does Block use?
Snowflake is named in 56% of job postings at Block, followed by MySQL (44%), Amazon Aurora (33%), DynamoDB (22%).
Snowflake
5 56%
MySQL
4 44%
Amazon Aurora
3 33%
DynamoDB
2 22%
Redis
2 22%
Delta Lake
1 11%
Google BigQuery
1 11%
What cloud and platforms does Block use?
AWS is named in 67% of job postings at Block, followed by Apache Kafka (44%), Datadog (33%), Databricks (33%).
AWS
6 67%
Apache Kafka
4 44%
Datadog
3 33%
Databricks
3 33%
Buildkite
2 22%
Kubernetes
2 22%
Prefect
1 11%
Show all (10)
What developer tools does Block use?
Terraform is named in 44% of job postings at Block, followed by Gradle (22%), dbt (22%), gRPC (22%).
What AI and ML technologies does Block use?
Claude is named in 22% of job postings at Block, followed by LLM (11%).
Which engineering practices does Block ask for?
CI/CD is named in 33% of job postings at Block, followed by AI Agents (33%), ETL/ELT (22%), Machine Learning (11%).
What other technologies does Block use?
Bitcoin is named in 100% of job postings at Block.
Bitcoin
9 100%
What does each Block team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
6 postingsHow does your stack fit Block?
How much does Block pay by technology?
Median stated pay of the postings that name each technology, against the median of all Block postings with stated pay: $284k across 8 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| AWS | 5 | $327k | +15% |
| Snowflake | 5 | $297k | +5% |
| Python | 5 | $245k | −13% |
| SQL | 5 | $245k | −13% |
How modern is the Block stack?
Block 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: 2; legacy ones: 0.
How common is the Block stack in its industry?
Share of the 729 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Block apart
Companies with a stack like Block
Questions about the Block tech stack
What programming languages does Block use?
The languages named in Block job postings are Python (56%), SQL (56%), Java (56%), Kotlin (56%), TypeScript (22%), as a share of the 9 postings of the last 12 months.
Does Block use AWS?
Yes. AWS is named in 6 of 9 job postings (67%) and required in 4 of them.
What cloud and platforms does Block use?
The cloud and platforms named in Block job postings are AWS (6), Apache Kafka (4), Datadog (3) (postings in brackets).
What skills do you need for a Backend job at Block?
Backend postings at Block most often require AWS (4), Java (4), Kotlin (4), Bitcoin (3), out of 6 postings in the last 12 months.
Is the Block tech stack changing?
No new technology has appeared in Block job postings in the last six months.
How modern is the Block tech stack?
Block 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: 2; legacy ones: 0.
How does Alion know the Block tech stack?
Alion reads every job posting Block publishes and tags the technologies each one names. The figures on this page count the 9 postings of the last 12 months and were updated on Oct 3, 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, "Block tech stack: 48 technologies from 9 job postings", as of Oct 3, 2026. https://alion.io/company/block/technologies