Moss tech stack
Moss builds mostly with Java, Python, SQL, Go. Its stack also includes Flink, Spring Framework, Apache Kafka, GCP. Flink is named in 33 of the 33 job postings Moss published in the last 12 months (100%). Counted by Alion from the job postings of Moss, updated Sep 28, 2026.
What programming languages does Moss use?
Java is named in 15% of job postings at Moss, followed by Python (6%), SQL (6%), Go (3%).
What frameworks and libraries does Moss use?
Flink is named in 100% of job postings at Moss, followed by Spring Framework (9%), LangChain (3%), LangGraph (3%).
Flink
33 100%
Spring Framework
3 9%
LangChain
1 3%
LangGraph
1 3%
LightGBM
1 3%
LlamaIndex
1 3%
PyTorch
1 3%
Scikit-learn
1 3%
Show all (9)
What databases does Moss use?
BigQuery is named in 3% of job postings at Moss, followed by Google BigQuery (3%), PostgreSQL (3%).
BigQuery 
What cloud and platforms does Moss use?
Apache Kafka is named in 6% of job postings at Moss, followed by GCP (6%), Anthropic (3%), GitHub Actions (3%).
Apache Kafka
2 6%
GCP
2 6%
GitHub Actions
1 3%
Google GKE
1 3%
Kubernetes
1 3%
Vertex AI
1 3%
What developer tools does Moss use?
Rest API is named in 15% of job postings at Moss, followed by Google ADK (3%), Helm (3%), KEDA (3%).
What AI and ML technologies does Moss use?
LLM is named in 9% of job postings at Moss, followed by Claude (6%), ChatGPT (3%), Gemini (3%).
Which engineering practices does Moss ask for?
AI Agents is named in 6% of job postings at Moss, followed by Function Calling (6%), LLM Guardrails (6%), RAG (6%).
AI Agents
2 6%
Function Calling
2 6%
RAG
2 6%
Anomaly Detection
1 3%
CI/CD
1 3%
Show all (13)
What does each Moss 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 Moss?
How is the Moss 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 Moss stack?
Moss scores 90 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: 6; legacy ones: 0.
How common is the Moss stack in its industry?
Share of the 181 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Moss
Questions about the Moss tech stack
What programming languages does Moss use?
The languages named in Moss job postings are Java (15%), Python (6%), SQL (6%), Go (3%), as a share of the 33 postings of the last 12 months.
Does Moss use Flink?
Yes. Flink is named in 33 of 33 job postings (100%) and required in 28 of them.
What cloud and platforms does Moss use?
The cloud and platforms named in Moss job postings are Apache Kafka (2), GCP (2), Anthropic (1) (postings in brackets).
What skills do you need for a Backend job at Moss?
Backend postings at Moss most often require Flink (3), Java (3), Rest API (3), Spring Framework (3), out of 3 postings in the last 12 months.
Is the Moss tech stack changing?
Yes. SQL, Claude, Spring Framework, Function Calling first appeared in Moss job postings in the last six months.
How modern is the Moss tech stack?
Moss scores 90 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: 6; legacy ones: 0.
How does Alion know the Moss tech stack?
Alion reads every job posting Moss publishes and tags the technologies each one names. The figures on this page count the 33 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, "Moss tech stack: 51 technologies from 33 job postings", as of Sep 28, 2026. https://alion.io/company/moss/technologies