99X tech stack
99X builds mostly with Java, SQL, Python, TypeScript. Its stack also includes Azure, Kubernetes, PostgreSQL, Spring Boot. Azure is named in 9 of the 14 job postings 99X published in the last 12 months (64%). Counted by Alion from the job postings of 99X, updated Oct 22, 2026.
What programming languages does 99X use?
Java is named in 43% of job postings at 99X, followed by SQL (29%), Python (21%), TypeScript (14%).
Show all (9)
What frameworks and libraries does 99X use?
Spring Boot is named in 29% of job postings at 99X, followed by Quarkus (21%), Angular (7%), Celery (7%).
Spring Boot
4 29%
Quarkus
3 21%
Angular
1 7%
Celery
1 7%
Django
1 7%
FastAPI
1 7%
Flink
1 7%
Haystack
1 7%
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What databases does 99X use?
PostgreSQL is named in 29% of job postings at 99X, followed by Redis (7%).
PostgreSQL
4 29%
Redis
1 7%
What cloud and platforms does 99X use?
Azure is named in 64% of job postings at 99X, followed by Kubernetes (50%), GitLab CI (36%), Grafana (29%).
Azure
9 64%
Kubernetes
7 50%
GitLab CI
5 36%
Grafana
4 29%
AWS
3 21%
Apache Kafka
3 21%
Azure AKS
3 21%
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What developer tools does 99X use?
Rest API is named in 29% of job postings at 99X, followed by Terraform (29%), ArgoCD (29%), Prometheus (21%).
Rest API
4 29%
Terraform
4 29%
ArgoCD
4 29%
Prometheus
3 21%
Ansible
2 14%
gRPC
2 14%
Helm
2 14%
Loki
2 14%
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Which engineering practices does 99X ask for?
CI/CD is named in 57% of job postings at 99X, followed by FinOps (21%), AI Agents (14%), Function Calling (14%).
CI/CD
8 57%
FinOps
3 21%
AI Agents
2 14%
Function Calling
2 14%
Prompt Engineering
2 14%
RAG
2 14%
SLI/SLO/SLA
2 14%
Show all (21)
What does each 99X team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
4 postingsDevOps
4 postingsHow does your stack fit 99X?
How modern is the 99X stack?
99X scores 75 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: 1; legacy ones: 0.
How common is the 99X stack in its industry?
Share of the 7,519 companies in the same industries, whose stack Alion knows, that use each technology.
What sets 99X apart
Companies with a stack like 99X
Questions about the 99X tech stack
What programming languages does 99X use?
The languages named in 99X job postings are Java (43%), SQL (29%), Python (21%), TypeScript (14%), Bash (7%), as a share of the 14 postings of the last 12 months.
Does 99X use Spring Boot?
Yes. Spring Boot is named in 4 of 14 job postings (29%) and required in 4 of them.
What cloud and platforms does 99X use?
The cloud and platforms named in 99X job postings are Azure (9), Kubernetes (7), GitLab CI (5) (postings in brackets).
What skills do you need for a Backend job at 99X?
Backend postings at 99X most often require Java (4), Rest API (3), Spring Boot (3), Quarkus (2), out of 4 postings in the last 12 months.
Is the 99X tech stack changing?
No new technology has appeared in 99X job postings in the last six months.
How modern is the 99X tech stack?
99X scores 75 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: 1; legacy ones: 0.
How does Alion know the 99X tech stack?
Alion reads every job posting 99X publishes and tags the technologies each one names. The figures on this page count the 14 postings of the last 12 months and were updated on Oct 22, 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, "99X tech stack: 80 technologies from 14 job postings", as of Oct 22, 2026. https://alion.io/company/99x/technologies