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Backend Engineer — AI Trainer

Freelance / Selbstständig

France (France), Germany (Germany), Belgium (Belgium), Netherlands (Netherlands), United Kingdom (United Kingdom), Italy (Italy), Spain (Spain), Portugal (Portugal), Denmark (Denmark), Finland (Finland), Sweden (Sweden), Norway (Norway), Switzerland (Switzerland), Poland (Poland)

Veröffentlicht am 2. Juni 2026

  • Vertragsart

    Freelance / Selbstständig

  • Orte

    France (France), Germany (Germany), Belgium (Belgium), Netherlands (Netherlands), United Kingdom (United Kingdom), Italy (Italy), Spain (Spain), Portugal (Portugal), Denmark (Denmark), Finland (Finland), Sweden (Sweden), Norway (Norway), Switzerland (Switzerland), Poland (Poland)

  • Startdatum

    Ab sofort / nach Vereinbarung

  • Gehalt

    60 EUR - 130 EUR / Stunde

  • Homeoffice/Telearbeit

    Vollständig möglich

JT AI Labs illustration

Job Title: Backend Engineer

Job Type: Contract

Location: Remote

Job Summary: In this role, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required — your domain knowledge is what matters.

Key Responsibilities:

  • Design, develop, and maintain scalable backend services and APIs that meet demanding performance requirements.
  • Collaborate cross-functionally to translate business needs into technical specifications and impactful backend solutions.
  • Optimize backend systems for reliability, security, and efficiency, ensuring seamless user experiences.
  • Write clean, well-documented, and thoroughly tested code, adhering to best engineering practices.
  • Participate actively in code reviews, mentoring, and knowledge sharing sessions with fellow engineers.
  • Monitor, troubleshoot, and resolve backend issues in production environments, targeting root causes and continuous improvements.
  • Contribute to architecture discussions and decisions, bringing innovative ideas and a solutions-oriented mindset.

Required Skills and Qualifications:

  • 1+ Years Proven expertise in backend development using modern programming languages.
  • Extensive experience designing and implementing RESTful APIs and microservices architectures.
  • Strong proficiency with relational and NoSQL databases, along with data modeling principles.
  • Deep understanding of system security, authentication, and authorization best practices.
  • Experience with cloud platforms (AWS, GCP, or Azure) and containerization (Docker, Kubernetes).
  • Excellent written and verbal communication skills, with a collaborative and proactive approach.
  • Ability to thrive in a fast-paced, fully remote expert team environment.

Preferred Qualifications:

  • Familiarity with event-driven or server less architectures.
  • Experience with CI/CD pipelines and automated testing frameworks.
  • Background in mentoring or technical leadership within backend teams.

Join jtlabs.ai to see all available opportunities.

Bewerbungsfrist

Solange das Stellenangebot online ist

Studienniveau

Master-Niveau, MSc oder äquivalent; Promotion

Funktion

Technologie

Weitere Informationen über das Unternehmen

JT AI Labs

Use your expertise to train leading AI models