Role Overview
We’re looking to bring a Software Developer (Electronic Invoicing) to join a small, technically focused team building and maintaining a B2B electronic invoicing platform. We work with international standards and integrate with national tax systems worldwide. In this role, you’ll take end-to-end ownership of backend systems — from design and implementation to production operations.

About B2Brouter
B2Brouter is a leading European provider of electronic document exchange solutions, specializing in e-invoicing, e-procurement, and B2B data integration. We help companies automate, secure, and optimize their electronic transactions through reliable, scalable, and compliant digital platforms.

Key Responsibilities
- Design, build, and maintain REST APIs for invoice processing, document exchange, and third-party integrations.
- Develop and manage asynchronous processing pipelines using background jobs and queue systems.
- Build and maintain integrations with external platforms, including government tax authorities and document exchange networks.
- Optimize database queries,



ensure data consistency, and manage concurrency in high-throughput environments.
- Participate in code reviews, technical discussions, and contribute to backend architecture decisions.
- Support production operations, including incident response, monitoring, and troubleshooting.
- Write and maintain technical documentation (systems, APIs, integration specs, and operational runbooks).

Required Skills & Qualifications
- 4+ years of experience developing with Ruby on Rails in production environments.
- Strong experience designing and maintaining RESTful APIs.
- Hands-on experience with background job / queue systems and asynchronous workflows.
- Solid SQL knowledge and experience in database performance tuning & optimization.
- Comfortable working with XML-based formats and transformations (e.g., XML, XSLT) as well as JSON.
- Proven ability to work with third-party integrations and external d

📌 Software Developer (Sabadell)
🏢 B2Brouter
📍 Sabadell