Senior System Architect & Backend Developer AI-First Solutions
Workplace: Stockholm, Sverige
Expires: September 9, 2025
We are seeking a highly experienced System Architect and Backend Developer specialized in AI-first solutions to design, develop, and lead backend architecture and AI integration projects at Codebuilders AB, Stockholm. This full-time role demands strong expertise in Java backend development, AI systems, and cloud architectures, with direct collaboration with AI specialists and product teams.
Main requirements:
  • Bachelor’s degree in Computer Science, Software Engineering, or related field or equivalent experience
  • Minimum 5 years backend development experience in Java
  • At least 2 years experience building AI-driven systems (TensorFlow, PyTorch, Hugging Face, LLM integration)
  • Proven system architecture experience for distributed and cloud-based systems (AWS, Azure, GCP)
  • Strong knowledge of CI/CD, microservice architecture, Docker, Kubernetes
  • Hands-on with messaging systems such as RabbitMQ and Apache Kafka
  • Proficiency in designing and implementing concurrent and asynchronous processing
  • Cross-functional team leadership and mentoring
  • Fluent in English (Swedish is a plus)
Responsibilities:
  • Design and develop backend solutions with AI-first architecture
  • Leverage modern technologies, cloud platforms, and MLOps processes
  • Lead architecture decisions ensuring performance, security, and scalability
  • Collaborate with AI specialists, data scientists, and product teams to integrate AI models
  • Implement and optimize data pipelines and APIs for AI services
Required hard skills:
  • Java backend development
  • AI-driven system development (TensorFlow, PyTorch, Hugging Face, LLM integration)
  • Cloud architecture (AWS, Azure, GCP)
  • CI/CD pipelines
  • Microservice architecture
  • Container technologies (Docker, Kubernetes)
  • Messaging systems (RabbitMQ, Apache Kafka)
  • Concurrent and asynchronous programming
Recommended hard skills:
  • Prompt engineering and Large Language Model integration
  • Open-source project contributions in AI/backend
  • Optimizing data models for AI training and inference
  • SQL databases and query optimization
Soft skills:
  • Cross-functional team leadership
  • Developer mentoring
  • Aligning technical decisions with business goals
  • Effective collaboration
  • Fluency in English
Coding languages:
  • Java
Frameworks:
  • TensorFlow
  • PyTorch
  • Hugging Face
Natural languages:
  • English (Proficient)
  • Swedish (Basic familiarity)
Cultural skills:
  • Collaboration with AI specialists and product teams
  • Leadership in cross-functional environments
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