Job Description

Backend Developer

We are looking for a Senior Backend Developer responsible for designing, building and maintaining scalable backend systems, APIs and integrations.

Responsibilities:

• 
  Design, develop and maintain scalable backend services and APIs
• 
  Build and optimize GraphQL-based APIs and data layers
• 
  Develop serverless functions and event-driven components (FaaS)
• 
  Integrate with external systems including third-party APIs and OPC UA industrial servers
• 
  Work with data storage solutions and ensure performance, reliability, and scalability
• 
  Manage and evolve backend infrastructure and service architecture
• 
  Write clean, maintainable, and well-documented code

Requirements - Technical Skills:

• 
  Strong experience with Node.js in production systems
• 
  Solid understanding of GraphQL (schemas, resolvers, query optimization)
• 
  Experience with ORM tools and relational data modeling
• 
  Hands-on experience with FaaS (Function-as-a-Service) architectures
• 
  Experience integrating with:
  • 
    Third-party REST/GraphQL APIs
  • OPC UA servers and industrial data systems
• 
  Strong knowledge of PostgreSQL
  • 
    Schema design
  • 
    Query optimization
  • 
    Indexing strategies
• 
  Experience with S3-compatible object storage (e.g., MinIO)
• 
  Strong experience with Docker and containerized environments
• 
  Proficiency in scripting with:
  • Bash
  • Python
  • SQL.

If you are a good match, do not hesitate to apply!