Pencil tech stack
Pencil builds mostly with SQL, Python. Its stack also includes Apollo, Figma. Claude is named in 4 of the 20 job postings Pencil published in the last 12 months (20%). Counted by Alion from the job postings of Pencil, updated Oct 21, 2026.
What programming languages does Pencil use?
SQL is named in 15% of job postings at Pencil, followed by Python (5%).
What cloud and platforms does Pencil use?
Apollo is named in 15% of job postings at Pencil, followed by Figma (15%), AWS (10%), Azure (10%).
What developer tools does Pencil use?
Claude Code is named in 15% of job postings at Pencil.
Claude Code
3 15%
What AI and ML technologies does Pencil use?
Claude is named in 20% of job postings at Pencil, followed by Midjourney (15%), ChatGPT (10%), GPT-4 (5%).
Which engineering practices does Pencil ask for?
Digital Twin is named in 40% of job postings at Pencil, followed by Recommender Systems (40%), AI Agents (20%), IAM (10%).
AI Agents
4 20%
Fine-tuning
1 5%
Function Calling
1 5%
Show all (11)
What does each Pencil team work with?
The technologies each team's postings require most often, with the number of postings that require them.
AI/ML
4 postingsHow does your stack fit Pencil?
How is the Pencil 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 Pencil stack?
Pencil scores 86 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: 7; legacy ones: 0.
How common is the Pencil stack in its industry?
Share of the 1,522 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Pencil apart
Companies with a stack like Pencil
Questions about the Pencil tech stack
What programming languages does Pencil use?
The languages named in Pencil job postings are SQL (15%), Python (5%), as a share of the 20 postings of the last 12 months.
Does Pencil use Apollo?
Yes. Apollo is named in 3 of 20 job postings (15%) and required in 3 of them.
What cloud and platforms does Pencil use?
The cloud and platforms named in Pencil job postings are Apollo (3), Figma (3), AWS (2) (postings in brackets).
What skills do you need for a AI/ML job at Pencil?
AI/ML postings at Pencil most often require Claude (3), Claude Code (3), SQL (3), out of 4 postings in the last 12 months.
Is the Pencil tech stack changing?
Yes. Claude Code, SQL, Apollo first appeared in Pencil job postings in the last six months.
How modern is the Pencil tech stack?
Pencil scores 86 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: 7; legacy ones: 0.
How does Alion know the Pencil tech stack?
Alion reads every job posting Pencil publishes and tags the technologies each one names. The figures on this page count the 20 postings of the last 12 months and were updated on Oct 21, 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, "Pencil tech stack: 26 technologies from 20 job postings", as of Oct 21, 2026. https://alion.io/company/pencil-2/technologies