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Co-creating Solutions for a Better Future
Senior Fullstack Developer – React/Node.js
Location
Brazil
Posted
68 days ago
Salary
0
Seniority
Senior
Job Description
Senior Fullstack Developer – React/Node.js
Stefanini Brasil
• Automated Testing: Development of unit and integration tests (Test Pyramid). • Programming Logic: Strong understanding of basic data structures, algorithms, and flow control. • Version Control (Git): Essential commands (branch, commit, pull, push), workflows (Gitflow/GitHub Flow) and resolving simple conflicts. • HTTP Protocol: Understanding of verbs, status codes and how to use them to build or consume REST APIs. • Data Persistence: Basic knowledge of databases (SQL/NoSQL) and performing CRUD operations. • Design Patterns: Practical application of common patterns (Factory, Singleton, Observer, etc.) to solve recurring problems. • SOLID & Clean Code: Writing modular, extensible and maintainable code following the five SOLID principles. • Security: Implementation of authentication/authorization techniques (JWT, OAuth2) and mitigation of common risks. • API Design: Designing APIs following industry best practices (versioning, pagination, response patterns). • Observability: Ability to instrument code with logs and metrics to facilitate production diagnostics. • Containerization: Ability to create and manage images (Docker), understand volumes, basic networking and Docker Compose for local environments. • Architecture and Solution Design: Identify and design integrations between distributed systems and communication patterns. • Scalability and Resilience: Designing systems that handle high load and recover from failures (caching, messaging, circuit breakers). • Software Lifecycle (DevOps): Expertise in CI/CD pipelines, deployment strategies and process automation. • Mentoring and Code Review: Raising the team's technical bar through critical reviews and educational support to more junior engineers. • Pragmatism and Trade-offs: Ability to decide between quick and robust solutions based on context (deadlines, cost and team capacity). • Technical Debt Management: Strategic view on when to accept technical debt and planning for system modernization. • Production of RFCs, ADRs and other project documentation. • Experience with a cloud provider and its core services (preference for GCP).
Job Requirements
- JavaScript/TypeScript: Proficient with ES6+ and basic use of interfaces and types.
- NestJS: Familiarity with modules, controllers and services (basic CLI structure).
- (Optional) Express: Creating routes, using basic middleware and simple error handling.
- Testing: Writing tests using Jest or Vitest and using mocks.
- Runtime: Understanding of the Event Loop (single-threaded) and package management (npm/yarn).
- NestJS (Proficient): Mastery of Dependency Injection, DTOs with class-validator, Pipes and Guards.
- TypeScript: Use of Generics and Utility Types for robust typing.
- ORM: Basic CRUD operations using Prisma or TypeORM and migrations.
- (Optional) Advanced Express: Folder structuring (Controller-Service pattern), creating custom middleware and global error handling.
- NestJS Architecture: Proficient with Interceptors and Custom Decorators.
- Performance: Identifying memory leaks; handling Streams/Buffers for large files.
- Software Architecture: Deciding when to use the simplicity of Express (Lambdas/Cloud Functions) vs. the robustness of NestJS (complex systems).
- Fundamentals: Basic lifecycle (Hooks: useState, useEffect).
- Componentization: Creating functional components and passing props.
- Styling: CSS Modules, Styled Components or Tailwind CSS.
- Forms: Basic handling of inputs and state.
- Testing: Writing tests using Jest + React Testing Library (RTL).
- Advanced Hooks: Optimization with useMemo, useCallback and useRef.
- State Management: Context API or libraries like Zustand or Redux Toolkit.
- Routing: Configuring complex routes with React Router or Next.js.
- Front-end Architecture: Design Systems, Compound Components and rendering patterns.
- Performance: Analysis of re-renders, Code Splitting (Dynamic Imports) and focus on Core Web Vitals.
- Accessibility: Implementing ARIA attributes, focus management and keyboard navigation support.
Benefits
- Meal allowance or food voucher;
- Discounts on courses, universities and language schools;
- Stefanini Academy — platform with free, up-to-date online courses and certificates;
- Mentoring;
- Benefits club for medical consultations and exams;
- Health insurance;
- Dental insurance;
- Discounts and perks at leading establishments;
- Travel club;
- Pet care partnership.
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