Senior Full-Stack Software Engineer, Applied AI

hace 8 horas

Madrid, Madrid, España Jobgether A tiempo completo
This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Full-Stack Software Engineer, Applied AI in Spain. We are seeking a versatile Senior Full-Stack Software Engineer to join a dynamic Applied AI team, developing cutting-edge AI-powered solutions. In this role, you will design, build, and deploy full-stack applications that leverage large language models (LLMs) to create transformative experiences. You will ship production-ready features, design experiments, and optimize AI infrastructure, all while collaborating with cross-functional teams. The ideal candidate is highly curious, enjoys rapid iteration, and thrives in a fast-paced environment where innovation meets execution. This role offers the opportunity to shape real-world AI applications, contribute to scalable systems, and make a tangible impact across products used by thousands of users. Accountabilities:
  • Develop full-stack AI applications, including front-end components (ReactJS) and back-end services (Ruby on Rails), shipping projects end-to-end.
  • Design and execute experiments, such as A/B tests and AI evaluations, to validate features, measure impact, and guide iterative improvements.
  • Build and maintain infrastructure for AI inference, ensuring performance, reliability, and scalability.
  • Collaborate with product, design, and leadership teams to shape features and drive innovation.
  • Continuously improve processes, tools, and systems to accelerate AI feature deployment.
  • Stay current with emerging AI research, tools, and technologies, applying relevant advancements to production use cases.
  • Maintain high standards of code quality, user experience, and operational reliability.
Requirements:6+ years of experience as a full-stack engineer on high-traffic, production applications.Proficiency with Ruby on Rails, ReactJS, and relational databases (MySQL/PostgreSQL).Hands-on experience developing AI features in production (e.g., LLM-powered tools, RAG systems, AI agents).Strong experimentation mindset: designing, running, and iterating on tests to validate feature impact.Ability to work in a fast-paced environment with autonomy, personal accountability, and collaboration across teams.Comfortable learning new technologies quickly and navigating ambiguity.Strong alignment with organizational values.Proficient in English (CEFR Level C2 / ILR Level 5). Benefits:Competitive salary: $130,000 – $140,000 USD per year, with annual review and equity options.Fully remote: work from anywhere in the world.High autonomy and trust in executing your work.Generous paid time off: 35 days annually, plus paid sabbatical after 5 years.Comprehensive medical coverage or reimbursement options.Parental leave and family support benefits.Home office and professional development stipends.Annual bonus potential.Twice-yearly fully paid company retreats in international locations. Why Apply Through Jobgether? We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team. We appreciate your interest and wish you the best  Why Apply Through Jobgether? 
Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.

#LI-CL1 We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

  • Senior Full-Stack Engineer

    hace 11 horas

    Madrid, Madrid, España BEAI Energy A tiempo completo

    Company DescriptionBEAI is a specialized Artificial Intelligence company for the energy and industrial sectors that revolutionizes the application of this technology by placing human beings at the center of our solutions and applying the highest ethical standards.We have an AI laboratory with exceptional talent that our clients can leverage through anas a...

  • Full-stack Engineer – Internal AI Platform

    hace 10 horas

    Madrid, Madrid, España Groupon A tiempo completo

    About the RoleHybrid from Madrid or ValenciaYou will engineer the core of our proprietary internal platform that democratizes AI across the company. This is not a standard full-stack role maintaining existing systems, you will build the factory that enables other teams to create autonomous AI Agents. You will design Chain of Thought reasoning flows,...

  • Full-Stack AI Engineer

    hace 9 horas

    Madrid, Madrid, España Avooq A tiempo completo

    Avooq is an innovative AI startup that generates complete instant novels on demand. Our mission is to revolutionize literary creation with advanced AI technology, enabling users to obtain coherent and personalized stories in seconds. We believe in the power of AI to democratize storytelling and transform digital entertainment.We are seeking a talented and...

  • Senior Full Stack Engineer

    hace 9 horas

    Madrid, Madrid, España Description Ciklum A tiempo completo

    DescriptionCiklum is looking for a Senior Full Stack Engineer to join our team full-time in Spain.We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners,...

  • Applied AI Engineer

    hace 11 horas

    Madrid, Madrid, España Jobgether A tiempo completo

    This position is posted by Jobgether on behalf of a partner company. We are currently looking for an Applied AI Engineer in Spain. We are seeking an innovative Applied AI Engineer to design and deploy AI-powered features used by millions of people worldwide. In this role, you will work across a diverse ecosystem of products, embedding AI into user...

  • Full-Stack AI Engineer

    hace 10 horas

    Madrid, Madrid, España Avooq A tiempo completo

     About UsAvooq is an innovative AI startup that generates complete instant novels on demand. Our mission is to revolutionize literary creation with advanced AI technology, enabling users to obtain coherent and personalized stories in seconds. We believe in the power of AI to democratize storytelling and transform digital entertainment.We are seeking a...

  • Full Stack Software Engineer

    hace 8 horas

    Madrid, Madrid, España KIME A tiempo completo

    About KIMEKIME is building the future of brand visibility in the age of AI. Our platform helps companies scale by unlocking discovery across emerging AI ecosystems - from ChatGPT, Gemini, and Perplexity to the next generation of intelligent search.As consumer behavior shifts from traditional search to conversational AI, KIME enables brands to understand,...

  • Senior Full-Stack Software Engineer, CMS

    hace 9 horas

    Madrid, Madrid, España Jobgether A tiempo completo

    This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Full-Stack Software Engineer, CMS in Spain. We are seeking an experienced full-stack engineer to join a high-impact engineering team focused on content management and site-building platforms. In this role, you will develop and ship features used by...

  • Full Stack Software Engineer

    hace 10 horas

    Madrid, Madrid, España Chapter One A tiempo completo

    Job DescriptionWe're looking for Full Stack Software Egineer with strong TypeScript and mobile development skills to join our fully remote team. You'll lead the charge on building high-impact, scalable mobile applications, collaborating with a global team of engineers, and working within a modern, AI-assisted development workflow.Send your resume here:...

  • Senior Full-Stack Software Engineer

    hace 10 horas

    Madrid, Madrid, España Wizeline A tiempo completo

    We are:Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact.With the right people...