Backend Developer – Mid-level
Location
Brazil
Posted
49 days ago
Salary
0
Seniority
Mid Level
Job Description
Backend Developer – Mid-level
TRACK&FIELD
• Develop, evolve, and maintain REST APIs and microservices for the TFSports platform, ensuring scalability, performance, and security; • Work in a continuous delivery model with short cycles (tasks of 1–2 days), making frequent commits and small, focused, high-quality PRs; • Use generative AI (Claude and similar) as a technical copilot in daily work to support development, debugging, documentation, and refactoring; • Perform critical review of all code produced (by AI or humans), ensuring high standards of quality, clarity, efficiency, handling of edge cases, and security; • Actively participate in code reviews, technical discussions, and architectural decisions, contributing to the team's and product's continuous improvement; • Maintain clear and up-to-date technical documentation (READMEs, ADRs, Confluence), promoting traceability and knowledge sharing; • Contribute to the evolution of CI/CD pipelines, automated tests, and deployment processes to ensure reliable, continuous deliveries; • Take end-to-end technical responsibility, owning the quality, tests, security, and sustainability of delivered code.
Job Requirements
- Hands-on experience with production REST APIs, including endpoint design, versioning, documentation, and defining clear contracts;
- Advanced SQL proficiency (MySQL/MariaDB): data modeling, complex queries, indexes, execution plan analysis, and performance optimization;
- Practical experience with AWS: EC2, RDS, S3, Cognito, CloudWatch, and Lambda;
- Solid knowledge of authentication and authorization (OAuth 2.0, JWT, Cognito User Pools);
- Experience with backend testing (unit, integration, and contract tests);
- API security knowledge: input validation, attack prevention (e.g., injection), rate limiting, and CORS configuration;
- Advanced Git: branching strategies, rebasing, squashing, and pull request best practices;
- Applied knowledge of software architecture (SOLID, Clean Architecture, Dependency Injection);
- Active use of generative AI in development (Claude, ChatGPT, Copilot) — mandatory requirement;
- Ability to critically evaluate AI outputs, identifying inconsistencies, hallucinations, and anti-patterns;
- Knowledge of prompt engineering, including context structuring, few-shot, and guided-reasoning techniques.
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