Mainstay tech stack
Mainstay builds mostly with SQL, Python, TypeScript, JavaScript. Its stack also includes AWS, GitHub, PostgreSQL, Snowflake. Claude is named in 3 of the 4 job postings Mainstay published in the last 12 months (75%). Counted by Alion from the job postings of Mainstay, updated Oct 15, 2026.
What programming languages does Mainstay use?
SQL is named in 50% of job postings at Mainstay, followed by Python (25%), TypeScript (25%), JavaScript (25%).
What frameworks and libraries does Mainstay use?
React.js is named in 25% of job postings at Mainstay, followed by Django (25%), FastAPI (25%), Next.js (25%).
What databases does Mainstay use?
PostgreSQL is named in 25% of job postings at Mainstay, followed by Snowflake (25%).
PostgreSQL
1 25%
Snowflake
1 25%
What cloud and platforms does Mainstay use?
AWS is named in 25% of job postings at Mainstay, followed by GitHub (25%).
What developer tools does Mainstay use?
Microsoft Excel is named in 25% of job postings at Mainstay, followed by Terraform (25%), dbt (25%).
What AI and ML technologies does Mainstay use?
Claude is named in 75% of job postings at Mainstay, followed by LLM (75%), ChatGPT (50%), Gemini (50%).
Which engineering practices does Mainstay ask for?
Hallucination is named in 25% of job postings at Mainstay, followed by LLM Guardrails (25%).
Hallucination
1 25%
How does your stack fit Mainstay?
How is the Mainstay 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 Mainstay stack?
Mainstay scores 90 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: 5; legacy ones: 0.
How common is the Mainstay stack in its industry?
Share of the 207 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Mainstay
Questions about the Mainstay tech stack
What programming languages does Mainstay use?
The languages named in Mainstay job postings are SQL (50%), Python (25%), TypeScript (25%), JavaScript (25%), as a share of the 4 postings of the last 12 months.
What cloud and platforms does Mainstay use?
The cloud and platforms named in Mainstay job postings are AWS (1), GitHub (1) (postings in brackets).
Is the Mainstay tech stack changing?
Yes. SQL, Claude, ChatGPT, Gemini first appeared in Mainstay job postings in the last six months.
How modern is the Mainstay tech stack?
Mainstay scores 90 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: 5; legacy ones: 0.
How does Alion know the Mainstay tech stack?
Alion reads every job posting Mainstay publishes and tags the technologies each one names. The figures on this page count the 4 postings of the last 12 months and were updated on Oct 15, 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, "Mainstay tech stack: 22 technologies from 4 job postings", as of Oct 15, 2026. https://alion.io/company/mainstaylabs/technologies