FusionAuth tech stack
FusionAuth builds mostly with Java, Go, JavaScript. Its stack also includes Kubernetes, AWS, MySQL, PostgreSQL. Java is named in 2 of the 3 job postings FusionAuth published in the last 12 months (67%). Counted by Alion from the job postings of FusionAuth, updated Sep 28, 2026.
What programming languages does FusionAuth use?
Java is named in 67% of job postings at FusionAuth, followed by Go (33%), JavaScript (33%).
What databases does FusionAuth use?
MySQL is named in 33% of job postings at FusionAuth, followed by PostgreSQL (33%).
MySQL
1 33%
PostgreSQL
1 33%
What cloud and platforms does FusionAuth use?
Kubernetes is named in 67% of job postings at FusionAuth, followed by AWS (33%), GitHub Actions (33%), Linux (33%).
What developer tools does FusionAuth use?
Claude Code is named in 67% of job postings at FusionAuth, followed by Copilot (33%), Helm (33%), Rest API (33%).
Which engineering practices does FusionAuth ask for?
AI Agents is named in 33% of job postings at FusionAuth, followed by CI/CD (33%), PKI (33%), Platform Engineering (33%).
What does each FusionAuth team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
3 postingsHow does your stack fit FusionAuth?
How modern is the FusionAuth stack?
FusionAuth scores 81 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: 0; legacy ones: 0.
How common is the FusionAuth stack in its industry?
Share of the 268 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like FusionAuth
Questions about the FusionAuth tech stack
What programming languages does FusionAuth use?
The languages named in FusionAuth job postings are Java (67%), Go (33%), JavaScript (33%), as a share of the 3 postings of the last 12 months.
Does FusionAuth use Kubernetes?
Yes. Kubernetes is named in 2 of 3 job postings (67%) and required in 2 of them.
What cloud and platforms does FusionAuth use?
The cloud and platforms named in FusionAuth job postings are Kubernetes (2), AWS (1), GitHub Actions (1) (postings in brackets).
What skills do you need for a Backend job at FusionAuth?
Backend postings at FusionAuth most often require Claude Code (2), Java (2), Kubernetes (2), out of 3 postings in the last 12 months.
Is the FusionAuth tech stack changing?
No new technology has appeared in FusionAuth job postings in the last six months.
How modern is the FusionAuth tech stack?
FusionAuth scores 81 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: 0; legacy ones: 0.
How does Alion know the FusionAuth tech stack?
Alion reads every job posting FusionAuth 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 Sep 28, 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, "FusionAuth tech stack: 19 technologies from 3 job postings", as of Sep 28, 2026. https://alion.io/company/fusionauth/technologies