Senior Full-Stack Engineer for AI-Assisted Software Modernization

Oteia Systems is looking for a senior full-stack engineer who can understand existing codebases quickly and use AI coding tools without compromising security or quality. Your work will include: analysing and documenting inherited repositories; fixing issues and adding automated tests; building APIs, integrations, and new functionality; refactoring legacy components; reviewing and validating AI-generated code; delivering changes through controlled CI/CD workflows. You should have strong backend, frontend, database, API, authentication, and cloud experience. Please describe one real project where AI tools significantly improved your development speed and explain how you verified the generated code. Potential for recurring and long-term work. Individual freelancers only.