Blue tech stack
Blue builds mostly with Kotlin, Node JS. Its stack also includes AWS, Amazon ECS, PostgreSQL, LiteRT. LLM is named in 3 of the 4 job postings Blue published in the last 12 months (75%). Counted by Alion from the job postings of Blue, updated Nov 7, 2026.
What programming languages does Blue use?
Kotlin is named in 25% of job postings at Blue, followed by Node JS (25%).
What frameworks and libraries does Blue use?
LiteRT is named in 25% of job postings at Blue, followed by ONNX Runtime (25%).
What cloud and platforms does Blue use?
AWS is named in 50% of job postings at Blue, followed by Amazon ECS (25%), Amazon S3 (25%), Anthropic (25%).
What developer tools does Blue use?
llama.cpp is named in 25% of job postings at Blue, followed by WebSockets (25%).
llama.cpp
1 25%
WebSockets
1 25%
Which engineering practices does Blue ask for?
AI Agents is named in 100% of job postings at Blue, followed by Edge AI (25%), Function Calling (25%), Knowledge Distillation (25%).
AI Agents
4 100%
Function Calling
1 25%
Knowledge Distillation
1 25%
Quantization
1 25%
Speech Recognition
1 25%
Show all (10)
How does your stack fit Blue?
How modern is the Blue stack?
Blue scores 72 out of 100 (Modern). 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 Blue stack in its industry?
Share of the 694 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Blue
Questions about the Blue tech stack
What programming languages does Blue use?
The languages named in Blue job postings are Kotlin (25%), Node JS (25%), as a share of the 4 postings of the last 12 months.
What cloud and platforms does Blue use?
The cloud and platforms named in Blue job postings are AWS (2), Amazon ECS (1), Amazon S3 (1) (postings in brackets).
Is the Blue tech stack changing?
No new technology has appeared in Blue job postings in the last six months.
How modern is the Blue tech stack?
Blue scores 72 out of 100 (Modern). 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 Blue tech stack?
Alion reads every job posting Blue 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 Nov 7, 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, "Blue tech stack: 26 technologies from 4 job postings", as of Nov 7, 2026. https://alion.io/company/blue/technologies