Full Stack Developer (m/f/d)

O firmie: - B2X is a leading provider of post sales services specializing in circular lifecycle management for electronic hardware. Established in 2007 and head-quartered in Munich, our solutions and services spanning the whole lifetime of a wide range of consumer electronic products as well as B2B electronic infrastructure. - Our digital platform services and (web) portal solutions facilitate the digitalization and automation of multiple workflows and interactions with end-users and partners in our clients' network. - We empower companies with innovative carbon solutions to manage their hardware lifecycles towards carbon net zero. - Together with top-tier tech companies across multiple industry sectors and geographies, we create unique customer experiences at reduced complexity and cost for lifecycle management. - The kind of unique B2X operating model integrates more than 200 service partners in over 30 countries, orchestrated by our B2X team of more than 100 service professionals and steered by the proprietary B2X service management platform. Zakres obowiązków: - . Billing & Invoice Data Processing - • 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. - 2. Approval & Workflow Automation - • 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. - 3. System Architecture & Full Stack Development - • 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. - 4. Data Quality, Compliance & Security - • 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. - 5. Collaboration & Stakeholder Management - • 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. Oferujemy: - 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