WEX tech stack
WEX builds mostly with C#, Java, Python, SQL. Its stack also includes Apache Kafka, Kubernetes, MS SQL, PostgreSQL. C# is named in 8 of the 10 job postings WEX published in the last 12 months (80%). Counted by Alion from the job postings of WEX, updated Oct 5, 2026.
What programming languages does WEX use?
C# is named in 80% of job postings at WEX, followed by Java (70%), Python (50%), SQL (50%).
C# 
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What frameworks and libraries does WEX use?
ASP.NET Core is named in 30% of job postings at WEX, followed by Angular (30%), Spring Boot (30%), Blazor (20%).
ASP.NET Core
3 30%
Angular
3 30%
Spring Boot
3 30%
Blazor
2 20%
Flink
1 10%
OpenTelemetry
1 10%
React.js
1 10%
What databases does WEX use?
MS SQL is named in 40% of job postings at WEX, followed by PostgreSQL (40%), Snowflake (10%), Milvus (10%).
MS SQL
4 40%
PostgreSQL
4 40%
Snowflake
1 10%
Milvus
1 10%
OpenSearch
1 10%
Pinecone
1 10%
Weaviate
1 10%
What cloud and platforms does WEX use?
Apache Kafka is named in 70% of job postings at WEX, followed by Kubernetes (70%), GitHub (50%), Azure (40%).
Apache Kafka
7 70%
Kubernetes
7 70%
GitHub
5 50%
Azure
4 40%
Azure DevOps
4 40%
GitHub Actions
4 40%
.NET
2 20%
AWS
2 20%
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What developer tools does WEX use?
Docker is named in 60% of job postings at WEX, followed by GraphQL (40%), Terraform (40%), ArgoCD (30%).
Docker
6 60%
GraphQL
4 40%
Terraform
4 40%
ArgoCD
3 30%
Helm
3 30%
Copilot
2 20%
Rest API
2 20%
Claude Code
1 10%
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Which engineering practices does WEX ask for?
CI/CD is named in 70% of job postings at WEX, followed by AI Agents (30%), Configuration Management (10%), Context Engineering (10%).
CI/CD
7 70%
AI Agents
3 30%
Configuration Management
1 10%
Incident Management
1 10%
Prompt Engineering
1 10%
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What does each WEX team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
8 postingsHow does your stack fit WEX?
How modern is the WEX stack?
WEX scores 79 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 WEX stack in its industry?
Share of the 544 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like WEX
Questions about the WEX tech stack
What programming languages does WEX use?
The languages named in WEX job postings are C# (80%), Java (70%), Python (50%), SQL (50%), JavaScript (40%), as a share of the 10 postings of the last 12 months.
Does WEX use ASP.NET Core?
Yes. ASP.NET Core is named in 3 of 10 job postings (30%) and required in 3 of them.
What cloud and platforms does WEX use?
The cloud and platforms named in WEX job postings are Apache Kafka (7), Kubernetes (7), GitHub (5) (postings in brackets).
What skills do you need for a Backend job at WEX?
Backend postings at WEX most often require Apache Kafka (6), C# (6), Java (6), Docker (5), out of 8 postings in the last 12 months.
Is the WEX tech stack changing?
No new technology has appeared in WEX job postings in the last six months.
How modern is the WEX tech stack?
WEX scores 79 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 WEX tech stack?
Alion reads every job posting WEX publishes and tags the technologies each one names. The figures on this page count the 10 postings of the last 12 months and were updated on Oct 5, 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, "WEX tech stack: 61 technologies from 10 job postings", as of Oct 5, 2026. https://alion.io/company/wex/technologies