Fortnox tech stack
Fortnox builds mostly with TypeScript, JavaScript, SQL, Python. Its stack also includes React.js, Apache Kafka, PostgreSQL, Kubernetes. TypeScript is named in 11 of the 21 job postings Fortnox published in the last 12 months (52%). Counted by Alion from the job postings of Fortnox, updated Oct 9, 2026.
What programming languages does Fortnox use?
TypeScript is named in 52% of job postings at Fortnox, followed by JavaScript (52%), SQL (48%), Python (24%).
TypeScript
11 52%
JavaScript
11 52%
SQL
10 48%
Python
5 24%
Java
5 24%
Kotlin
4 19%
PHP
2 10%
C#
1 5%
Show all (12)
What frameworks and libraries does Fortnox use?
React.js is named in 43% of job postings at Fortnox, followed by Spring Boot (14%), Playwright (10%), Cypress (5%).
React.js
9 43%
Spring Boot
3 14%
Playwright
2 10%
Cypress
1 5%
Jest
1 5%
Mocha
1 5%
OpenTelemetry
1 5%
PyTorch
1 5%
Show all (15)
What databases does Fortnox use?
PostgreSQL is named in 33% of job postings at Fortnox, followed by Google BigQuery (14%), BigQuery (5%), OpenSearch (5%).
BigQuery 
What cloud and platforms does Fortnox use?
Apache Kafka is named in 38% of job postings at Fortnox, followed by Kubernetes (29%), GitHub (19%), GCP (10%).
Apache Kafka
8 38%
Kubernetes
6 29%
GitHub
4 19%
GCP
2 10%
Grafana
2 10%
Bitbucket
2 10%
MLFlow
1 5%
Show all (12)
What developer tools does Fortnox use?
Rest API is named in 19% of job postings at Fortnox, followed by Claude Code (10%), Copilot (10%), Prometheus (10%).
Rest API
4 19%
Claude Code
2 10%
Copilot
2 10%
Prometheus
2 10%
dbt
2 10%
Cursor
1 5%
Docker
1 5%
Git
1 5%
Show all (15)
What AI and ML technologies does Fortnox use?
Claude is named in 14% of job postings at Fortnox, followed by LLM (5%).
Which engineering practices does Fortnox ask for?
Machine Learning is named in 24% of job postings at Fortnox, followed by CI/CD (10%).
CI/CD
2 10%
What does each Fortnox team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
7 postingsFrontend
4 postingsAnalytics
3 postingsHow does your stack fit Fortnox?
How is the Fortnox 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 Fortnox stack?
Fortnox scores 84 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: 2; legacy ones: 0.
How common is the Fortnox stack in its industry?
Share of the 255 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Fortnox
Questions about the Fortnox tech stack
What programming languages does Fortnox use?
The languages named in Fortnox job postings are TypeScript (52%), JavaScript (52%), SQL (48%), Python (24%), Java (24%), as a share of the 21 postings of the last 12 months.
Does Fortnox use React.js?
Yes. React.js is named in 9 of 21 job postings (43%) and required in 8 of them.
What cloud and platforms does Fortnox use?
The cloud and platforms named in Fortnox job postings are Apache Kafka (8), Kubernetes (6), GitHub (4) (postings in brackets).
What skills do you need for a Backend job at Fortnox?
Backend postings at Fortnox most often require TypeScript (5), Apache Kafka (4), Java (4), JavaScript (4), out of 7 postings in the last 12 months.
Is the Fortnox tech stack changing?
Yes. Playwright, Bitbucket, GCP, Google BigQuery first appeared in Fortnox job postings in the last six months.
How modern is the Fortnox tech stack?
Fortnox scores 84 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: 2; legacy ones: 0.
How does Alion know the Fortnox tech stack?
Alion reads every job posting Fortnox publishes and tags the technologies each one names. The figures on this page count the 21 postings of the last 12 months and were updated on Oct 9, 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, "Fortnox tech stack: 62 technologies from 21 job postings", as of Oct 9, 2026. https://alion.io/company/fortnox/technologies