Lead Developer (Backstage) - Energy Sector - Brussels - Freelance / CDI at AlterSolutions

The external service provider will support the client organization in the analysis, design, extension, and operation of an existing Backstage platform. The scope includes architectural consulting, plugin development, platform extensions, system integrations, and the production of comprehensive technical documentation. Key Responsibilities Technical Concept & Architecture Design • Development of technical concepts for the extension and adaptation of an existing Backstage platform • Design of scalable, high‑performance, and maintainable solutions in line with internal IT, architecture, security, and compliance standards • Analysis and consideration of security requirements, operating models, and target architectures • Preparation of technical recommendations and decision‑support documentation for future platform evolutionArchitecture & Platform Analysis • In‑depth analysis of the platform’s architecture and governance framework • Assessment of existing technologies, interfaces, plugins, and integration mechanisms • Collection and structuring of organizational, functional, and technical requirements • Consolidation and presentation of analysis results to support architectural and design decisionsBackstage Plugin Design & Development • Design, development, testing, and documentation of custom Backstage plugins (frontend and backend) • Implementation of agreed technical and business workflows • Integration with internal systems, services, and end‑to‑end process chainsPlatform Extension & Customization • Implementation of platform adaptations and extensions • Enhancement of frontend and backend components to support organizational structures, role models, and business processes • Ensuring compliance with functional and non‑functional requirements (performance, stability, security, maintainability) • Design and delivery of technical improvements based on stakeholder and project feedbackBackend Services & Integrations • Extension and configuration of the Backstage backend • Integration with internal tools, APIs, CI/CD pipelines, identity management, and asset systems • Configuration and documentation of authentication, authorization, and interface mechanisms • Technical advisory on integration patterns, security architectures, and operating modelsDocumentation & Knowledge Transfer • Creation and maintenance of clear, structured, and traceable technical documentation, including: • Architecture overviews • Technical design specifications • Plugin and API documentation • Documentation of workflows, interfaces, integrations, and configuration decisions • Support effective knowledge transfer to ensure long‑term maintainability and operational continuity