Fullstack Software Engineer with focus on Backend Development (nur SV-Pflichtige) (m / f / d)

Fullstack Software Engineer with focus on Backend Development (nur SV-Pflichtige)

(m / f / d)

Freiberuflich für ein Projekt in Teilauslastung Essen Start date : asap Reference number : 858244 / 1

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Responsibilities

• Take end-to-end responsibility for the implementation of the backend and the frontend, ensuring they follow the agreed architecture, coding standards and API / UI contracts
• Design and implement the application-level behaviour for Modbus and non-Modbus device integration, including periodic data acquisition, transformation and persistence into the chosen time-series and relational data stores ( InfluxDB v3 or an equivalent time-series database, and Postgres or a similar relational database)
• Design and implement the internal APIs and, where applicable, gateway layer so that frontend, backend application and external systems can communicate reliably, securely and in a way that supports the 1 Hz device read / write requirements
• Shape and implement the application-level security model together with the Solution Architect and DevOps Engineer : integration with the identity provider ( Keycloak or a similar IdP), token-based authentication / authorization and role-based access to APIs and UIs
• Ensure that the backend and frontend are observable : define and expose meaningful metrics, logs and, where appropriate, traces that support effective operations, troubleshooting and capacity planning
• Collaborate closely with the DevOps Engineer to ensure that backend and frontend are buildable and deployable in the target on-prem environment, including suitable health checks, configuration patterns and environment handling
• Contribute to the definition and refinement of the domain model, data model and workflows ( device configuration, pipelines, alarms) and reflect these consistently in APIs, backend logic and frontend screens
• Establish and maintain an appropriate level of automated tests (unit, integration and basic end-to-end) for the implemented backend and frontend, aligned with the project’s testing strategy
• Produce and maintain application-level documentation (READMEs, API documentation, configuration notes, operational considerations) and feed back implementation experience into the overall architecture

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