Hybrid Senior Backend Developer – Golang, Data & Integrations

at i3D.net

• Job title: Senior Backend Developer – Golang, Data & Integrations
• Job type: Full Time
• Experience level: Senior
• Salary: Not specified
• Degree requirement: Bachelor's Degree
• Tech skills: Ansible, Docker, ERP, ETL, Grafana, GRPC, MariaDB, MySQL, PHP, Postgres, Prometheus, Python, SQL, Terraform, Go, .NET
• Location requirements: Hybrid, Rotterdam, Netherlands

About the role

• Senior Backend Developer focusing on data integrations and migrations at i3D.net. Building robust backend solutions in Go with hybrid work arrangements at their Rotterdam HQ.

Responsibilities

• Own data migrations and pipelines: Design and implement ETL flows to move billing, contract, and asset data into target systems with full validation and rollback capability
• Model and transform complex data structures: Analyze legacy databases, define transformation logic, and ensure consistent, idempotent data handling
• Build scalable backend services in Go: Develop services and abstraction layers that expose billing logic and enforce business rules, while leveraging the right tools (e.g. SQL, Python) for data transformations and migrations
• Standardize product and pricing models: Define reusable product and offer structures that work consistently across systems and integrations
• Integrate external systems into billing flows: Connect ERP, CRM, payment, and inventory platforms with secure, reliable data exchange and reconciliation
• Develop robust APIs and integrations: Build REST and gRPC APIs with strong validation, logging, retry logic, and monitoring
• Automate migrations and operational processes: Create tooling, scripts, and runbooks that support repeatable migrations and controlled cutovers
• Improve observability and incident response: Implement monitoring, dashboards, and alerting to quickly detect and resolve data or integration issues
• Collaborate across teams: Work closely with Finance, Product, and Business Analysts to refine business rules and validate outputs
• Mentor and contribute to architecture decisions: Share knowledge, review code, and help shape the long-term billing architecture

Requirements

• Backend engineering: 5+ years of building production systems in Go, .NET, or PHP
• Data and SQL: Strong experience with MySQL, MariaDB, or Postgres and working with complex schemas
• Migrations and ETL: Designed transformation pipelines, written idempotent scripts, and built validation tooling
• APIs and integrations: Built and integrated REST or gRPC APIs with authentication patterns like OAuth2 or JWT
• 3rd party integrations: Connected systems such as ERP, CRM, payment providers, or inventory platforms
• Infrastructure and automation: Comfortable with Docker, CI/CD pipelines, and tools like Terraform or Ansible
• Observability and reliability: Experience with Prometheus, Grafana, logging, and tracing
• Testing and quality: Write unit, integration, and contract tests to ensure reliability
• Ownership and communication: Take end to end responsibility and work effectively with technical and nontechnical stakeholders
• Remote vs Onsite: This is a hybrid position with some onsite work required at our Rotterdam office. You are either already in the Netherlands or open to relocating here, and we provide relocation services to support your move (a valid EU work permit is necessary).

Benefits

• Hybrid work arrangements
• Relocation services provided for successful candidates