Fullstack Developer
Full-stack development: frontend, backend, databases, and deployment
Fullstack Developer is a role in the Frontend Engineering family. It has 65 skills across 5 levels (from Junior to Principal). 185 skills are mandatory. Key domains: Programming Fundamentals, Backend Development, Frontend Development.
Technology Stack
Focus by Level
Building simple features from UI to API. Working with React/Vue + Node.js/Python. Writing basic tests. Fixing bugs on both sides.
Independent end-to-end feature development. Designing APIs and UIs. Setting up CI/CD. Working with databases. Performance optimization.
Application architecture (frontend + backend). Technology selection. UX and performance optimization. Mentoring. Data model design.
Technical leadership of fullstack team. Architectural decisions. Frontend and backend standards. Coordination with design and product.
Product engineering strategy. Choosing technology stack for the company. Architecture for fast time-to-market.
Skill Matrix
65 skills × 5 levels. Click on a cell for details.
AI-Assisted Development
4 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| GitHub Copilot | A | W | A | E | E |
| Cursor IDE | A | W | A | A | — |
| ChatGPT / Claude | A | W | A | E | E |
| Prompt Engineering for Code | A | W | A | E | — |
API & Integration
6 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| REST API Design | A | W | A | E | E |
| GraphQL Design | A | W | A | E | E |
| WebSocket API Design | A | W | A | E | E |
| gRPC & Protocol Buffers | A | W | A | E | E |
| API Versioning Strategies | A | W | A | E | E |
| API Documentation | A | W | A | E | E |
Architecture & System Design
1 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| System Design Fundamentals | A | W | A | E | E |
Backend Development
4 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| Python Web Frameworks | A | W | A | E | E |
| Node.js Frameworks | A | W | A | E | E |
| Apache Kafka | A | W | A | E | E |
| Redis | A | W | A | E | E |
Cloud & Infrastructure
5 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| Docker | A | W | A | E | E |
| Kubernetes Core | A | W | A | E | E |
| Terraform | A | W | A | E | E |
| AWS | A | W | A | E | E |
| Network Fundamentals | A | W | A | — | — |
Database Management
6 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| PostgreSQL | A | W | A | E | E |
| MongoDB | A | W | A | E | E |
| Database Indexing | A | W | A | E | E |
| Query Optimization | A | W | A | E | — |
| Data Modeling & Schema Design | A | W | A | E | E |
| Database Migrations | A | W | A | E | E |
DevOps & CI/CD
1 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| GitHub Actions / GitLab CI | A | W | A | E | E |
Frontend Development
14 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| React Core | A | W | A | E | E |
| Next.js | A | W | A | E | E |
| Modern CSS | A | W | A | E | E |
| Tailwind CSS | A | W | A | E | E |
| Design System Development | A | W | A | E | E |
| Web Accessibility | A | W | A | E | E |
| Core Web Vitals | A | W | A | E | E |
| Bundle Optimization | A | W | A | E | E |
| Vite & Modern Bundlers | A | W | A | E | E |
| Component Testing | A | W | A | E | E |
| State Management | A | W | A | E | E |
| Data Fetching | A | W | A | E | E |
| Micro Frontends | A | W | A | E | E |
| SSR/SSG/ISR Patterns | A | W | A | E | E |
Observability & Monitoring
5 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| Structured Logging | A | W | A | E | E |
| ELK Stack | A | W | A | E | E |
| Prometheus & Grafana | A | W | A | E | E |
| OpenTelemetry | A | W | A | E | E |
| SLI / SLO / SLA | A | W | A | E | E |
Performance Engineering
1 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| Latency Optimization | A | W | A | E | E |
Programming Fundamentals
9 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| Algorithms & Complexity | A | W | A | E | E |
| Data Structures | A | W | A | E | E |
| OOP & SOLID Principles | A | W | A | E | E |
| Design Patterns | A | W | A | E | E |
| Multithreading | A | W | A | E | E |
| Async Programming | A | W | A | E | E |
| Code Quality & Refactoring | A | W | A | E | E |
| Type Safety & Type Systems | A | W | A | E | E |
| Memory Management | A | W | A | E | E |
Security
3 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| OWASP & Application Security | A | W | A | E | E |
| Secure Coding Practices | A | W | A | E | E |
| JWT / OAuth2 / OIDC | A | W | A | E | E |
Testing & QA
4 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| TDD & BDD | A | W | A | E | E |
| Unit Testing | A | W | A | E | E |
| Integration Testing | A | W | A | E | E |
| E2E Testing | A | W | A | E | E |
Version Control & Collaboration
2 skills| Skills | Jun | Mid | Sen | Lead | Princ |
|---|---|---|---|---|---|
| Git Advanced | A | W | A | E | E |
| Code Review | A | W | A | E | E |
FAQ
What skills are needed for the Fullstack Developer role?
The Fullstack Developer role requires 65 skills, of which 185 are mandatory. Skills are distributed across 5 levels: from Junior to Principal. See full matrix.
How to advance to the next level in the Fullstack Developer role?
Use the Grade Calculator to assess your current level and get personalized recommendations. The system will show which skills need to be developed for the next level.
What tech stack is used in the Fullstack Developer role?
The stack includes 5 technologies at different levels. TypeScript, React/Vue, Node.js (Express/NestJS) ╨╕╨╗╨╕ Python (FastAPI), PostgreSQL, Docker, Git, TypeScript strict, Next.js/Nuxt, NestJS/FastAPI, PostgreSQL/Redis, Prisma/SQLAlchemy, Docker Compose, CI/CD, Next.js/Remix + NestJS/FastAPI, PostgreSQL/Redis/MongoDB, Kubernetes basics, GraphQL/tRPC, Terraform basics, Monitoring...
How does the community define requirements for the Fullstack Developer role?
Role requirements are shaped by the community through a proposal system. Any member can suggest changes that go through voting and expert review.