Top Selection tech stack
Top Selection builds mostly with SQL, Python, 1C, JavaScript. Its stack also includes PostgreSQL, Apache Kafka, Linux, Hadoop. SQL is named in 22 of the 48 job postings Top Selection published in the last 12 months (46%). Counted by Alion from the job postings of Top Selection, updated Sep 27, 2026.
What programming languages does Top Selection use?
SQL is named in 46% of job postings at Top Selection, followed by Python (31%), 1C (13%), JavaScript (13%).
1C 
C# 
Show all (15)
What frameworks and libraries does Top Selection use?
Hadoop is named in 10% of job postings at Top Selection, followed by Angular (6%), CatBoost (6%), LightGBM (6%).
Show all (48)
And 8 more, each named in fewer postings.
What databases does Top Selection use?
PostgreSQL is named in 29% of job postings at Top Selection, followed by Greenplum (8%), Redis (8%), ClickHouse (6%).
PostgreSQL
14 29%
Greenplum
4 8%
Redis
4 8%
ClickHouse
3 6%
MS SQL
3 6%
Oracle
3 6%
MySQL
2 4%
Qdrant
2 4%
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What cloud and platforms does Top Selection use?
Apache Kafka is named in 15% of job postings at Top Selection, followed by Linux (15%), Spark (15%), Kubernetes (13%).
Apache Kafka
7 15%
Spark
7 15%
Kubernetes
6 13%
Grafana
6 13%
Airflow
3 6%
GitLab CI
3 6%
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What developer tools does Top Selection use?
Git is named in 35% of job postings at Top Selection, followed by Docker (17%), Prometheus (13%), Informatica (10%).
Git
17 35%
Docker
8 17%
Prometheus
6 13%
Rest API
5 10%
pySpark
5 10%
GraphQL
3 6%
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What AI and ML technologies does Top Selection use?
LLM is named in 13% of job postings at Top Selection, followed by Claude (2%), LoRA (2%), PEFT (2%).
Which engineering practices does Top Selection ask for?
CI/CD is named in 21% of job postings at Top Selection, followed by ETL/ELT (17%), AI Agents (10%), Machine Learning (8%).
CI/CD
10 21%
AI Agents
5 10%
RAG
4 8%
Function Calling
3 6%
GitOps
2 4%
Show all (26)
What other technologies does Top Selection use?
Kotlin Coroutines is named in 2% of job postings at Top Selection.
Kotlin Coroutines
1 2%
What does each Top Selection team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
9 postingsData Science
7 postingsAnalytics
5 postingsAI/ML
5 postingsHow does your stack fit Top Selection?
How much does Top Selection pay by technology?
Median stated pay of the postings that name each technology, against the median of all Top Selection postings with stated pay: $38k across 39 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| SQL | 18 | $37k | −2% |
| Python | 12 | $39k | +4% |
| PostgreSQL | 12 | $37k | −3% |
| Linux | 7 | $37k | −1% |
| Grafana | 6 | $40k | +7% |
| Apache Kafka | 6 | $40k | +7% |
| LLM | 6 | $39k | +4% |
| Kubernetes | 6 | $38k | +2% |
| 1C | 6 | $38k | +1% |
| Spark | 5 | $39k | +4% |
How modern is the Top Selection stack?
Top Selection scores 83 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: 4; legacy ones: 0.
How common is the Top Selection stack in its industry?
Share of the 42 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Top Selection apart
Companies with a stack like Top Selection
Questions about the Top Selection tech stack
What programming languages does Top Selection use?
The languages named in Top Selection job postings are SQL (46%), Python (31%), 1C (13%), JavaScript (13%), C++ (10%), as a share of the 48 postings of the last 12 months.
Does Top Selection use Hadoop?
Yes. Hadoop is named in 5 of 48 job postings (10%) and required in 5 of them.
What cloud and platforms does Top Selection use?
The cloud and platforms named in Top Selection job postings are Apache Kafka (7), Linux (7), Spark (7) (postings in brackets).
What skills do you need for a Backend job at Top Selection?
Backend postings at Top Selection most often require Git (5), SQL (4), Linux (3), .NET (2), out of 9 postings in the last 12 months.
Is the Top Selection tech stack changing?
No new technology has appeared in Top Selection job postings in the last six months.
How modern is the Top Selection tech stack?
Top Selection scores 83 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: 4; legacy ones: 0.
How does Alion know the Top Selection tech stack?
Alion reads every job posting Top Selection publishes and tags the technologies each one names. The figures on this page count the 48 postings of the last 12 months and were updated on Sep 27, 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, "Top Selection tech stack: 176 technologies from 48 job postings", as of Sep 27, 2026. https://alion.io/company/top-selection/technologies