Trajectory tech stack
Trajectory builds mostly with C++, Python, TypeScript, JavaScript. Its stack also includes OpenAI, Hugging Face, JAX, PyTorch. OpenAI is named in 8 of the 8 job postings Trajectory published in the last 12 months (100%). Counted by Alion from the job postings of Trajectory, updated Nov 13, 2026.
What programming languages does Trajectory use?
C++ is named in 13% of job postings at Trajectory, followed by Python (13%), TypeScript (13%), JavaScript (13%).
What frameworks and libraries does Trajectory use?
JAX is named in 38% of job postings at Trajectory, followed by PyTorch (38%), CUDA (13%), React.js (13%).
What cloud and platforms does Trajectory use?
OpenAI is named in 100% of job postings at Trajectory, followed by Hugging Face (75%), Figma (25%), GitHub (13%).
What developer tools does Trajectory use?
Claude Code is named in 100% of job postings at Trajectory, followed by Windsurf (88%), Braintrust (75%).
Which engineering practices does Trajectory ask for?
AI Agents is named in 100% of job postings at Trajectory, followed by Post-training (25%), KV Cache (13%).
What does each Trajectory team work with?
The technologies each team's postings require most often, with the number of postings that require them.
AI/ML
6 postingsHow does your stack fit Trajectory?
How is the Trajectory 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 Trajectory stack?
Trajectory 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: 0; legacy ones: 0.
How common is the Trajectory stack in its industry?
Share of the 164 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Trajectory
Questions about the Trajectory tech stack
What programming languages does Trajectory use?
The languages named in Trajectory job postings are C++ (13%), Python (13%), TypeScript (13%), JavaScript (13%), as a share of the 8 postings of the last 12 months.
Does Trajectory use JAX?
Yes. JAX is named in 3 of 8 job postings (38%) and required in 3 of them.
What cloud and platforms does Trajectory use?
The cloud and platforms named in Trajectory job postings are OpenAI (8), Hugging Face (6), Figma (2) (postings in brackets).
What skills do you need for a AI/ML job at Trajectory?
AI/ML postings at Trajectory most often require Windsurf (6), Claude Code (5), OpenAI (5), Braintrust (4), out of 6 postings in the last 12 months.
Is the Trajectory tech stack changing?
Yes. Figma first appeared in Trajectory job postings in the last six months.
How modern is the Trajectory tech stack?
Trajectory 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: 0; legacy ones: 0.
How does Alion know the Trajectory tech stack?
Alion reads every job posting Trajectory publishes and tags the technologies each one names. The figures on this page count the 8 postings of the last 12 months and were updated on Nov 13, 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, "Trajectory tech stack: 21 technologies from 8 job postings", as of Nov 13, 2026. https://alion.io/company/trajectory/technologies