Fourth tech stack
Fourth builds mostly with C#, Java. Its stack also includes Azure, AWS, Playwright. Azure is named in 3 of the 3 job postings Fourth published in the last 12 months (100%). Counted by Alion from the job postings of Fourth, updated Oct 17, 2026.
What programming languages does Fourth use?
C# is named in 33% of job postings at Fourth, followed by Java (33%).
What frameworks and libraries does Fourth use?
Playwright is named in 33% of job postings at Fourth.
Playwright
1 33%
What cloud and platforms does Fourth use?
Azure is named in 100% of job postings at Fourth, followed by AWS (33%), Azure DevOps (33%), Grafana (33%).
Azure
3 100%
AWS
1 33%
Azure DevOps
1 33%
Grafana
1 33%
AWS Fargate
1 33%
Kubernetes
1 33%
What developer tools does Fourth use?
Copilot is named in 33% of job postings at Fourth, followed by Jenkins (33%), Octopus Deploy (33%), Prometheus (33%).
Copilot
1 33%
Jenkins
1 33%
Octopus Deploy
1 33%
Prometheus
1 33%
Ansible
1 33%
Chef
1 33%
Docker
1 33%
Puppet
1 33%
Show all (9)
What AI and ML technologies does Fourth use?
LLM is named in 33% of job postings at Fourth.
LLM
1 33%
Which engineering practices does Fourth ask for?
AI Agents is named in 33% of job postings at Fourth, followed by CI/CD (33%), Incident Management (33%), LLM Guardrails (33%).
AI Agents
1 33%
CI/CD
1 33%
Incident Management
1 33%
Configuration Management
1 33%
Platform Engineering
1 33%
How does your stack fit Fourth?
How modern is the Fourth stack?
Fourth scores 73 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 Fourth stack in its industry?
Share of the 301 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Fourth
Questions about the Fourth tech stack
What programming languages does Fourth use?
The languages named in Fourth job postings are C# (33%), Java (33%), as a share of the 3 postings of the last 12 months.
Does Fourth use Azure?
Yes. Azure is named in 3 of 3 job postings (100%) and required in 2 of them.
What cloud and platforms does Fourth use?
The cloud and platforms named in Fourth job postings are Azure (3), AWS (1), Azure DevOps (1) (postings in brackets).
Is the Fourth tech stack changing?
No new technology has appeared in Fourth job postings in the last six months.
How modern is the Fourth tech stack?
Fourth scores 73 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 Fourth tech stack?
Alion reads every job posting Fourth publishes and tags the technologies each one names. The figures on this page count the 3 postings of the last 12 months and were updated on Oct 17, 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, "Fourth tech stack: 28 technologies from 3 job postings", as of Oct 17, 2026. https://alion.io/company/fourth-2/technologies