Backend Developer

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!