Upstart tech stack
Upstart builds mostly with Python, Kotlin, Java, SQL. Its stack also includes AWS, Kubernetes, React.js, Ruby on Rails. Python is named in 30 of the 74 job postings Upstart published in the last 12 months (41%). Counted by Alion from the job postings of Upstart, updated Sep 27, 2026.
What programming languages does Upstart use?
Python is named in 41% of job postings at Upstart, followed by Kotlin (28%), Java (27%), SQL (22%).
Python
30 41%
Kotlin
21 28%
Java
20 27%
SQL
16 22%
Ruby
13 18%
JavaScript
13 18%
Go
8 11%
TypeScript
8 11%
Show all (16)
What frameworks and libraries does Upstart use?
React.js is named in 14% of job postings at Upstart, followed by Ruby on Rails (8%), React Native (5%), Next.js (5%).
React.js
10 14%
Ruby on Rails
6 8%
React Native
4 5%
Next.js
4 5%
FastAPI
2 3%
Flask
1 1%
PyTorch
1 1%
Ray
1 1%
Show all (21)
What databases does Upstart use?
Amazon Redshift is named in 4% of job postings at Upstart, followed by PostgreSQL (4%), Snowflake (3%), BigQuery (1%).
Amazon Redshift
3 4%
PostgreSQL
3 4%
Snowflake
2 3%
BigQuery
1 1%
ClickHouse
1 1%
Google BigQuery
1 1%
Pinecone
1 1%
What cloud and platforms does Upstart use?
AWS is named in 28% of job postings at Upstart, followed by Kubernetes (20%), Databricks (11%), Apache Kafka (9%).
AWS
21 28%
Kubernetes
15 20%
Databricks
8 11%
Apache Kafka
7 9%
Spark
4 5%
GCP
4 5%
Datadog
4 5%
Show all (27)
What developer tools does Upstart use?
gRPC is named in 11% of job postings at Upstart, followed by Terraform (5%), Claude Code (4%), Docker (4%).
gRPC
8 11%
Terraform
4 5%
Claude Code
3 4%
Docker
3 4%
GraphQL
3 4%
Rest API
3 4%
ArgoCD
3 4%
Show all (21)
What AI and ML technologies does Upstart use?
LLM is named in 3% of job postings at Upstart.
LLM
2 3%
Which engineering practices does Upstart ask for?
Machine Learning is named in 42% of job postings at Upstart, followed by CI/CD (18%), A/B Testing (15%), AI Agents (8%).
CI/CD
13 18%
AI Agents
6 8%
Platform Engineering
6 8%
Incident Management
3 4%
Show all (24)
What does each Upstart team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
28 postingsAI/ML
6 postingsAnalytics
4 postingsHow does your stack fit Upstart?
How much does Upstart pay by technology?
Median stated pay of the postings that name each technology, against the median of all Upstart postings with stated pay: $231k across 57 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Python | 25 | $231k | 0% |
| AWS | 17 | $231k | 0% |
| Kotlin | 16 | $231k | 0% |
| Java | 16 | $231k | 0% |
| SQL | 14 | $218k | −6% |
| Kubernetes | 11 | $270k | +17% |
| Ruby | 10 | $231k | 0% |
| Databricks | 8 | $230k | 0% |
| Apache Kafka | 6 | $231k | 0% |
| JavaScript | 6 | $227k | −2% |
How is the Upstart 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 Upstart stack?
Upstart 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 Upstart stack in its industry?
Share of the 737 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Upstart apart
Companies with a stack like Upstart
Questions about the Upstart tech stack
What programming languages does Upstart use?
The languages named in Upstart job postings are Python (41%), Kotlin (28%), Java (27%), SQL (22%), Ruby (18%), as a share of the 74 postings of the last 12 months.
Does Upstart use React.js?
Yes. React.js is named in 10 of 74 job postings (14%) and required in 5 of them.
What cloud and platforms does Upstart use?
The cloud and platforms named in Upstart job postings are AWS (21), Kubernetes (15), Databricks (8) (postings in brackets).
What skills do you need for a Backend job at Upstart?
Backend postings at Upstart most often require Kotlin (17), Java (16), Python (14), AWS (8), out of 28 postings in the last 12 months.
Is the Upstart tech stack changing?
Yes. OpenAI Codex, Helm, Function Calling, Tool Use first appeared in Upstart job postings in the last six months.
How modern is the Upstart tech stack?
Upstart 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 Upstart tech stack?
Alion reads every job posting Upstart publishes and tags the technologies each one names. The figures on this page count the 74 postings of the last 12 months and were updated on Sep 27, 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, "Upstart tech stack: 117 technologies from 74 job postings", as of Sep 27, 2026. https://alion.io/company/upstart/technologies