> Markdown version of [/jobs/ext/3944315-full-stack-engineer-senior-lead-id41561-2-500-signing-bonus](https://www.wearedevelopers.com/jobs/ext/3944315-full-stack-engineer-senior-lead-id41561-2-500-signing-bonus). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Full Stack Engineer (Senior/Lead) Id41561 ($2,500 Signing Bonus) - **Company:** Agileengine, Llc. - **Location:** Zaragoza, Spain (Remote available) - **Contract:** Contract - **Skills:** Java (Programming Language), JavaScript (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Applications Architecture, Code Generation, Databases, Software Debugging, Python (Programming Language), Node.Js, Software Engineering, TypeScript, ReactJS, Codebase, Programming Languages - **Published:** October 27, 2026 - **Apply:** https://www.jobleads.com/es/job/full-stack-engineer-senior-lead-id41561-2-500-signing-bonus--zaragoza--e79ab16fe0e3c560ae505b7a93f947b66 ## About the Role We're looking for experienced Full-Stack Software Engineers to support an AI training project focused on software development, debugging, code evaluation, and technical problem-solving., * Python * React * JavaScript * Java * Node.js * Rust * Go * TypeScript * Strong full-stack development experience * Experience with APIs, databases, application architecture, and debugging ## Description Sr. Full-Stack Software Engineer - Remote Full-Stack Software Engineer Location: Global, Fully Remote Job Type: Contractor | ~15 hours/week Schedule: Flexible We're looking for experienced Full-Stack Software Engineers to support an AI training project focused on software development, debugging, code evaluation, and technical problem-solving. Key Responsibilities * Develop and debug front-end and back-end applications. * Build features, APIs, services, and data models. * Understand and work across unfamiliar codebases. * Troubleshoot application, API, database, and integration issues. * Review and evaluate AI-generated code for correctness, security, performance, and maintainability. * Translate and adapt software builds between programming languages. Required Skills * Python * React * JavaScript * Java * Node.js * Rust * Go * TypeScript * Strong full-stack development experience * Experience with APIs, databases, application architecture, and debugging Hiring Process * Submit application and screening questions. * Complete a ~30-minute AI interview. * Complete a technical assessment, if required. * Hiring manager review.