Senior Full-Stack Engineer (Remote, Part-Time, AI)

Jobgether; Portugal; Remote; EUR 34,000 - 55,000; Part time

Benefits offered by this job

Output-based earnings

Fully remote opportunity

Flexible schedule 15h/week

Fast onboarding and start

Job summary

Jobgether is seeking a Sr. Full-Stack Software Engineer for a fully remote, part-time contractor role based in Portugal. You will contribute across both client and server sides, integrating AI-generated solutions and complex task validation.

Flexible hours, approximately 15 hours per week, and a focus on robust, secure software with excellent problem-solving skills. Ideal candidates will have production-ready experience across front-end and back-end, expertise with multiple languages, and the

Qualifications

• Experience building production-ready full-stack applications across front-end and back-end
• Hands-on work across multiple programming languages and tech stacks
• Strong understanding of browser-based apps, APIs, databases, and integrations
• Ability to explore unfamiliar codebases and understand architectures
• Excellent debugging and analytical thinking, delivering validated technical work independently
• Availability to contribute approximately 15 hours per week with flexible days/hours

Responsibilities

• Develop, modify, and debug front-end and back-end components.
• Build user-facing features alongside services, APIs, and data models.
• Trace data flows across browsers, applications, APIs, databases and integrations.
• Explore unfamiliar codebases and understand architectures.
• Diagnose issues related to state, contracts, authentication, persistence, networking, and deployment.
• Evaluate, improve and validate multi-language code.
• Review AI-generated solutions for correctness, performance, security, and maintainability.
• Translate coding implementations between languages.
• Meet weekly task submission requirements and adhere to specifications.

Skills

Full-stack experience

Front-end & back-end

APIs & databases

Multiple languages

Debugging & problem solving

Independent contributor

Job description

Jobgether is seeking a Sr. Full-Stack Software Engineer for a fully remote, part-time contractor role based in Portugal. You will contribute across both client and server sides, integrating AI-generated solutions and complex task validation.

Flexible hours, approximately 15 hours per week, and a focus on robust, secure software with excellent problem-solving skills. Ideal candidates will have production-ready experience across front-end and back-end, expertise with multiple languages, and the