Data Scientist
Exploring data and building ML models to solve business problems
Level:
Programming Fundamentals
7 skills · 35 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| Algorithms & Data Structures | |||||
| Algorithms & Complexity | Awareness | Working | Advanced | Expert | Expert |
| Data Structures | Awareness | Working | Advanced | Expert | Expert |
| OOP & Design Patterns | |||||
| OOP & SOLID Principles | Awareness | Working | Advanced | Expert | Expert |
| Design Patterns | Awareness | Working | Advanced | Expert | Expert |
| Concurrency & Parallelism | |||||
| Multithreading | Awareness | Working | Advanced | Expert | Expert |
| Async Programming | Awareness | Working | Advanced | Expert | Expert |
| Clean Code & Refactoring | |||||
| Code Quality & Refactoring | Awareness | Working | Advanced | Expert | Expert |
Backend Development
2 skills · 10 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| Web Frameworks | |||||
| Python Web Frameworks | Awareness | Working | Advanced | Expert | Expert |
| Caching | |||||
| Redis | Awareness | Working | Advanced | Expert | Expert |
Database Management
5 skills · 25 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| Relational Databases | |||||
| PostgreSQL | Awareness | Working | Advanced | Expert | Expert |
| Advanced SQL | Awareness | Working | Advanced | Expert | Expert |
| NoSQL Databases | |||||
| ClickHouse | Awareness | Working | Advanced | Expert | Expert |
| Database Optimization | |||||
| Database Indexing | Awareness | Working | Advanced | Expert | Expert |
| Query Optimization | Awareness | Working | Advanced | Expert | Expert |
API & Integration
3 skills · 15 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| REST API | |||||
| REST API Design | Awareness | Working | Advanced | Expert | Expert |
| GraphQL | |||||
| GraphQL Design | Awareness | Working | Advanced | Expert | Expert |
| API Management | |||||
| API Documentation | Awareness | Working | Advanced | Expert | Expert |
Cloud & Infrastructure
4 skills · 20 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| Containerization | |||||
| Docker | Awareness | Working | Advanced | Expert | Expert |
| Kubernetes & Orchestration | |||||
| Kubernetes Core | Awareness | Working | Advanced | Expert | Expert |
| Cloud Providers | |||||
| AWS | Awareness | Working | Advanced | Expert | Expert |
| Networking | |||||
| Network Fundamentals | Awareness | Working | Advanced | Expert | Expert |
DevOps & CI/CD
1 skills · 5 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| CI/CD | |||||
| GitHub Actions / GitLab CI | Awareness | Working | Advanced | Expert | Expert |
Testing & QA
3 skills · 15 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| Unit Testing | |||||
| Unit Testing | Awareness | Working | Advanced | Expert | Expert |
| Unit Testing | Awareness | Working | Advanced | Expert | Expert |
| Integration Testing | |||||
| Integration Testing | Awareness | Working | Advanced | Expert | Expert |
Security
2 skills · 10 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| Application Security | |||||
| OWASP & Application Security | Awareness | Working | Advanced | Expert | Expert |
| Secure Coding Practices | Awareness | Working | Advanced | Expert | Expert |
Data Engineering
6 skills · 30 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| Batch Processing | |||||
| Apache Spark | Awareness | Working | Advanced | Expert | Expert |
| Pandas / Polars | Awareness | Working | Advanced | Expert | Expert |
| SQL-based ETL | Awareness | Working | Advanced | Expert | Expert |
| Data Quality | |||||
| Data Quality | Awareness | Working | Advanced | Expert | Expert |
| Data Visualization | |||||
| BI Dashboards | Awareness | Working | Advanced | Expert | Expert |
| Data Visualization | Awareness | Working | Advanced | Expert | Expert |
Machine Learning & AI
35 skills · 175 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| Classical Machine Learning | |||||
| Classical ML (scikit-learn) | Awareness | Working | Advanced | Expert | Expert |
| Gradient Boosting | Awareness | Working | Advanced | Expert | Expert |
| Bayesian Methods | Awareness | Working | Advanced | Expert | Expert |
| Dimensionality Reduction | Awareness | Working | Advanced | Expert | Expert |
| Ensemble Methods | Awareness | Working | Advanced | Expert | Expert |
| Experiment Design | Awareness | Working | Advanced | Expert | Expert |
| Feature Engineering | Awareness | Working | Advanced | Expert | Expert |
| Hypothesis Testing in ML | Awareness | Working | Advanced | Expert | Expert |
| Jupyter Notebooks | Awareness | Working | Advanced | Expert | Expert |
| Pandas / NumPy | Awareness | Working | Advanced | Expert | Expert |
| Python Programming | Awareness | Working | Advanced | Expert | Expert |
| scikit-learn | Awareness | Working | Advanced | Expert | Expert |
| Statistical Analysis | Awareness | Working | Advanced | Expert | Expert |
| Time Series Analysis | Awareness | Working | Advanced | Expert | Expert |
| Deep Learning | |||||
| PyTorch | Awareness | Working | Advanced | Expert | Expert |
| Reinforcement Learning | Awareness | Working | Advanced | Expert | Expert |
| TensorFlow / PyTorch | Awareness | Working | Advanced | Expert | Expert |
| Transfer Learning | Awareness | Working | Advanced | Expert | Expert |
| Deep Learning | Awareness | Working | Advanced | Expert | Expert |
| Neural Network Architectures | Awareness | Working | Advanced | Expert | Expert |
| Natural Language Processing | |||||
| Transformers & NLP | Awareness | Working | Advanced | Expert | Expert |
| Natural Language Processing | Awareness | Working | Advanced | Expert | Expert |
| Recommender Systems | |||||
| Recommender Systems Fundamentals | Awareness | Working | Advanced | Expert | Expert |
| MLOps | |||||
| MLflow | Awareness | Working | Advanced | Expert | Expert |
| Feature Stores | Awareness | Working | Advanced | Expert | Expert |
| Model Serving | Awareness | Working | Advanced | Expert | Expert |
| Experiment Tracking | Awareness | Working | Advanced | Expert | Expert |
| ML Pipelines | Awareness | Working | Advanced | Expert | Expert |
| ML Deployment | Awareness | Working | Advanced | Expert | Expert |
| ML Experiment Tracking | Awareness | Working | Advanced | Expert | Expert |
| ML Model Evaluation | Awareness | Working | Advanced | Expert | Expert |
| Model Monitoring | Awareness | Working | Advanced | Expert | Expert |
| LLM & Generative AI | |||||
| LLM Applications | Awareness | Working | Advanced | Expert | Expert |
| LLM Fine-tuning | Awareness | Working | Advanced | Expert | Expert |
| LLM Prompt Engineering | Awareness | Working | Advanced | Expert | Expert |
AI-Assisted Development
4 skills · 19 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| AI Coding Assistants | |||||
| GitHub Copilot | Awareness | Working | Advanced | Expert | Expert |
| Cursor IDE | Awareness | Working | Advanced | Advanced | — |
| ChatGPT / Claude | Awareness | Working | Advanced | Expert | Expert |
| Prompt Engineering | |||||
| Prompt Engineering for Code | Awareness | Working | Advanced | Expert | Expert |
Architecture & System Design
1 skills · 5 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| System Design | |||||
| System Design Fundamentals | Awareness | Working | Advanced | Expert | Expert |
Observability & Monitoring
3 skills · 15 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| Logging | |||||
| Structured Logging | Awareness | Working | Advanced | Expert | Expert |
| Metrics & Monitoring | |||||
| Prometheus & Grafana | Awareness | Working | Advanced | Expert | Expert |
| Distributed Tracing | |||||
| OpenTelemetry | Awareness | Working | Advanced | Expert | Expert |
Version Control & Collaboration
2 skills · 10 requirements| Skill | Junior | Middle | Senior | Lead | Principal |
|---|---|---|---|---|---|
| Git & Workflows | |||||
| Git Advanced | Awareness | Working | Advanced | Expert | Expert |
| Code Review | |||||
| Code Review | Awareness | Working | Advanced | Expert | Expert |