Harper tech stack
Harper builds mostly with Python, TypeScript, SQL, Go. Its stack also includes AWS, FastAI, PyTorch, Braze. Python is named in 7 of the 16 job postings Harper published in the last 12 months (44%). Counted by Alion from the job postings of Harper, updated Oct 16, 2026.
What programming languages does Harper use?
Python is named in 44% of job postings at Harper, followed by TypeScript (31%), SQL (31%), Go (6%).
What frameworks and libraries does Harper use?
FastAI is named in 13% of job postings at Harper, followed by PyTorch (13%), CrewAI (6%), LangChain (6%).
What databases does Harper use?
PostgreSQL is named in 6% of job postings at Harper.
PostgreSQL
1 6%
What cloud and platforms does Harper use?
AWS is named in 13% of job postings at Harper, followed by Braze (6%), GCP (6%), GitHub (6%).
AWS
2 13%
Braze
1 6%
GCP
1 6%
GitHub
1 6%
Kubernetes
1 6%
Perplexity
1 6%
AWS Lambda
1 6%
Show all (9)
What developer tools does Harper use?
Claude Code is named in 38% of job postings at Harper, followed by Cursor (38%), Windsurf (13%), Docker (6%).
What AI and ML technologies does Harper use?
LLM is named in 31% of job postings at Harper, followed by Claude (13%), ChatGPT (6%).
Which engineering practices does Harper ask for?
AI Agents is named in 44% of job postings at Harper, followed by A/B Testing (13%), Platform Engineering (13%), RAG (13%).
AI Agents
7 44%
Platform Engineering
2 13%
RAG
2 13%
CI/CD
1 6%
Hallucination
1 6%
Show all (10)
How does your stack fit Harper?
How much does Harper pay by technology?
Median stated pay of the postings that name each technology, against the median of all Harper postings with stated pay: $180k across 15 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Python | 7 | $250k | +39% |
| LLM | 5 | $280k | +56% |
| TypeScript | 5 | $280k | +56% |
| SQL | 5 | $190k | +6% |
How is the Harper 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 Harper stack?
Harper scores 89 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 Harper stack in its industry?
Share of the 2,694 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Harper
Questions about the Harper tech stack
What programming languages does Harper use?
The languages named in Harper job postings are Python (44%), TypeScript (31%), SQL (31%), Go (6%), as a share of the 16 postings of the last 12 months.
Does Harper use FastAI?
Yes. FastAI is named in 2 of 16 job postings (13%) and required in 2 of them.
What cloud and platforms does Harper use?
The cloud and platforms named in Harper job postings are AWS (2), Braze (1), GCP (1) (postings in brackets).
Is the Harper tech stack changing?
Yes. Windsurf, RAG, AWS, Platform Engineering first appeared in Harper job postings in the last six months.
How modern is the Harper tech stack?
Harper scores 89 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 Harper tech stack?
Alion reads every job posting Harper publishes and tags the technologies each one names. The figures on this page count the 16 postings of the last 12 months and were updated on Oct 16, 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, "Harper tech stack: 36 technologies from 16 job postings", as of Oct 16, 2026. https://alion.io/company/harper/technologies