Trainline tech stack
Trainline builds mostly with Python, C#, SQL, PowerShell. Its stack also includes AWS, GitHub Actions, DynamoDB, PostgreSQL. AWS is named in 13 of the 34 job postings Trainline published in the last 12 months (38%). Counted by Alion from the job postings of Trainline, updated Oct 1, 2026.
What programming languages does Trainline use?
Python is named in 29% of job postings at Trainline, followed by C# (24%), SQL (15%), PowerShell (9%).
What frameworks and libraries does Trainline use?
NumPy is named in 12% of job postings at Trainline, followed by Pandas (12%), Scikit-learn (12%), IdentityServer (6%).
NumPy
4 12%
Pandas
4 12%
Scikit-learn
4 12%
IdentityServer
2 6%
Ray
1 3%
LangChain
1 3%
LangGraph
1 3%
LightGBM
1 3%
Show all (9)
What databases does Trainline use?
DynamoDB is named in 21% of job postings at Trainline, followed by PostgreSQL (21%), Apache Iceberg (3%).
What cloud and platforms does Trainline use?
AWS is named in 38% of job postings at Trainline, followed by GitHub Actions (29%), New Relic (29%), .NET (24%).
AWS
13 38%
GitHub Actions
10 29%
New Relic
10 29%
.NET
8 24%
Spark
7 21%
Azure
5 15%
MLFlow
5 15%
GitHub
5 15%
Show all (23)
What developer tools does Trainline use?
Terraform is named in 47% of job postings at Trainline, followed by Docker (41%), Jenkins (6%), pySpark (6%).
What AI and ML technologies does Trainline use?
LLM is named in 3% of job postings at Trainline.
LLM
1 3%
Which engineering practices does Trainline ask for?
CI/CD is named in 41% of job postings at Trainline, followed by Machine Learning (24%), SLI/SLO/SLA (18%), AI Agents (15%).
CI/CD
14 41%
SLI/SLO/SLA
6 18%
AI Agents
5 15%
Incident Management
5 15%
Platform Engineering
4 12%
Show all (20)
What does each Trainline team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
8 postingsAI/ML
4 postingsData Science
4 postingsSupport
4 postingsHow does your stack fit Trainline?
How much does Trainline pay by technology?
Median stated pay of the postings that name each technology, against the median of all Trainline postings with stated pay: $95k across 23 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| AWS | 9 | $95k | 0% |
| GitHub Actions | 8 | $95k | 0% |
| New Relic | 7 | $95k | 0% |
| .NET | 6 | $107k | +13% |
| C# | 6 | $107k | +13% |
| DynamoDB | 5 | $95k | 0% |
| PostgreSQL | 5 | $95k | 0% |
| Azure | 5 | $66k | −30% |
How is the Trainline 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 Trainline stack?
Trainline scores 78 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 Trainline stack in its industry?
Share of the 167 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Trainline apart
Companies with a stack like Trainline
Questions about the Trainline tech stack
What programming languages does Trainline use?
The languages named in Trainline job postings are Python (29%), C# (24%), SQL (15%), PowerShell (9%), Kotlin (6%), as a share of the 34 postings of the last 12 months.
Does Trainline use NumPy?
Yes. NumPy is named in 4 of 34 job postings (12%) and required in 3 of them.
What cloud and platforms does Trainline use?
The cloud and platforms named in Trainline job postings are AWS (13), GitHub Actions (10), New Relic (10) (postings in brackets).
What skills do you need for a Backend job at Trainline?
Backend postings at Trainline most often require .NET (8), AWS (3), C# (3), Terraform (3), out of 8 postings in the last 12 months.
Is the Trainline tech stack changing?
Yes. DHCP, DNS, PowerShell, TCP/IP first appeared in Trainline job postings in the last six months.
How modern is the Trainline tech stack?
Trainline scores 78 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 Trainline tech stack?
Alion reads every job posting Trainline publishes and tags the technologies each one names. The figures on this page count the 34 postings of the last 12 months and were updated on Oct 1, 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, "Trainline tech stack: 72 technologies from 34 job postings", as of Oct 1, 2026. https://alion.io/company/trainline/technologies