Heidi tech stack
Heidi builds mostly with Python, SQL, TypeScript, JavaScript. Its stack also includes AWS, Databricks, React.js, Redis. Python is named in 13 of the 52 job postings Heidi published in the last 12 months (25%). Counted by Alion from the job postings of Heidi, updated Nov 12, 2026.
What programming languages does Heidi use?
Python is named in 25% of job postings at Heidi, followed by SQL (17%), TypeScript (12%), JavaScript (8%).
C# 
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What frameworks and libraries does Heidi use?
React.js is named in 6% of job postings at Heidi, followed by FastAPI (4%), Cypress (2%), Django (2%).
React.js
3 6%
FastAPI
2 4%
Cypress
1 2%
Django
1 2%
Jetpack Compose
1 2%
Next.js
1 2%
Playwright
1 2%
Pytest
1 2%
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What databases does Heidi use?
Redis is named in 4% of job postings at Heidi, followed by PostgreSQL (2%).
Redis
2 4%
PostgreSQL
1 2%
What cloud and platforms does Heidi use?
AWS is named in 10% of job postings at Heidi, followed by Databricks (10%), Datadog (8%), Figma (8%).
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What developer tools does Heidi use?
Cursor is named in 15% of job postings at Heidi, followed by Claude Code (13%), Canva (10%), Rest API (8%).
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What AI and ML technologies does Heidi use?
LLM is named in 17% of job postings at Heidi, followed by Claude (8%), Gemini (4%).
Which engineering practices does Heidi ask for?
CI/CD is named in 12% of job postings at Heidi, followed by Embeddings (12%), Fine-tuning (12%), AI Agents (8%).
CI/CD
6 12%
Embeddings
6 12%
Fine-tuning
6 12%
AI Agents
4 8%
FinOps
2 4%
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What does each Heidi team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Product
8 postingsSales
6 postingsBackend
6 postingsAnalytics
4 postingsSolutions
4 postingsHow does your stack fit Heidi?
How is the Heidi 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 Heidi stack?
Heidi 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: 3; legacy ones: 0.
How common is the Heidi stack in its industry?
Share of the 617 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Heidi
Questions about the Heidi tech stack
What programming languages does Heidi use?
The languages named in Heidi job postings are Python (25%), SQL (17%), TypeScript (12%), JavaScript (8%), Go (4%), as a share of the 52 postings of the last 12 months.
Does Heidi use React.js?
Yes. React.js is named in 3 of 52 job postings (6%) and required in 3 of them.
What cloud and platforms does Heidi use?
The cloud and platforms named in Heidi job postings are AWS (5), Databricks (5), Datadog (4) (postings in brackets).
What skills do you need for a Product job at Heidi?
Product postings at Heidi most often require Claude Code (5), Cursor (5), LLM (4), Canva (2), out of 8 postings in the last 12 months.
Is the Heidi tech stack changing?
Yes. FastAPI, Redis, FHIR, HL7 first appeared in Heidi job postings in the last six months.
How modern is the Heidi tech stack?
Heidi 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: 3; legacy ones: 0.
How does Alion know the Heidi tech stack?
Alion reads every job posting Heidi publishes and tags the technologies each one names. The figures on this page count the 52 postings of the last 12 months and were updated on Nov 12, 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, "Heidi tech stack: 93 technologies from 52 job postings", as of Nov 12, 2026. https://alion.io/company/heidi/technologies