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Hardware Lifecycle Solutions Made Digital and Circular
Full Stack Developer – Poland, Germany
Location
Germany
Posted
125 days ago
Salary
0
Seniority
Senior
Job Description
Full Stack Developer – Poland, Germany
B2X Care Solutions
• Design and implement backend services for invoice data extraction, validation, calculation, and transformation based on contractual rules, SLAs, pricing matrices and repair service conditions • Develop logic to consolidate data from logistics events, repair operations, partner services and external financial inputs • Ensure accurate settlement and reconciliation between partners (e.g., repair centers, logistics providers) and customers • Maintain audit trails and financial data integrity across the entire billing workflow • Build configurable approval workflows for internal and external stakeholders (e.g., finance controllers, partner managers, customer approvers) • Implement rule engines for exception handling, dispute management and manual overrides • Provide UI features for reviewing, commenting, and approving billing items and invoice lines • Develop scalable solutions that support onboarding of new customers and business areas • Design, develop and maintain robust backend APIs (REST) and microservices supporting billing and invoicing features • Create and modernize intuitive front-end interfaces for financial reporting, approval monitoring, dispute resolution, and invoice line-item inspection • Ensure seamless integration with operational systems, logistics platforms and finance systems • Contribute to database schema design focusing on financial accuracy, performance and auditability • Implement and maintain validation frameworks ensuring high data accuracy across billing sources • Ensure compliance with financial regulations, tax rules, customer/partner contracts and data protection requirements • Build monitoring and alerting systems to detect anomalies in pricing, invoice volumes or approval delays • Work closely with Finance, Operations, Partner Management and Data Engineering teams to improve billing performance and accuracy • Translate business requirements into technical specifications, workflows and architecture components • Support internal and external audits through transparent documentation and traceable system behaviour
Job Requirements
- Strong proficiency in full-stack development (e.g., TypeScript/Node.js, Java, Python, C#, or similar backend languages; React, Angular or Vue for frontend)
- Experience with relational databases (MySQL, PostgreSQL is an advantage) and data modelling for financial transactions
- Knowledge of microservice architectures, API design, message queues and integration patterns
- Experience with cloud platforms (AWS), GitLab and CI/CD pipelines
- Understanding of invoicing, billing rules, tax logic and financial reconciliation processes
- Experience in logistics, repair services, or supply chain is a plus
- Fluent English (required) - for business communication, documentation and interaction with international stakeholders
- Fluent Polish (required) - for collaboration with Polish-speaking technical teams and operational stakeholders
- Agile mindset, embracing iterative development, continuous improvement, transparency and collaboration
- Strong analytical and problem-solving abilities, with high attention to financial accuracy
- Ability to work cross-functionally and translate complex requirements into scalable technical solutions
- Clear communication skills for stakeholder discussions and documentation
Benefits
- A versatile area of responsibility with which you are at the pulse of the company with the opportunity to influence crucial decisions
- A flexible inclusive working environment
- A multi-cultural operating company
- An open-minded, positive and motivated environment with flat hierarchies and short decision paths
- The ability to work independently and responsibly and contribute your talents
- Colleagues which are more than happy to welcome you
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