Fullstack Software Engineer with focus on Backend Development (nur SV-Pflichtige) (m/f/d)
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 (e.g. 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 (e.g. 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 (e.g. 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
Profile
- Strong hands-on experience with backend development in a modern programming language such as Python, Java, Node.js or Go, and with frontend development using a modern web framework such as React, Angular or Vue
- Experience designing and implementing REST APIs, including error handling, pagination and versioning concepts
- Experience building and running containerised applications using Docker (or a comparable container runtime), including multi-stage builds, non-root containers and health checks
- Familiarity with working in environments that use orchestration and service discovery tooling such as Nomad and Consul (or similar), including understanding how applications should expose configuration, discovery and health information from an application perspective
- Experience with time-series and relational databases: e.g. InfluxDB (or an equivalent time-series store) and Postgres (or a similar relational database), including implementing read/write paths and managing connection handling from the application
- Experience implementing authentication and authorization in applications: Keycloak or similar IdP (OIDC/OAuth2), basic understanding of LDAP/OpenLDAP integration, and applying RBAC and token validation in backend and/or gateway
- Familiarity with observability concepts and instrumentation (metrics, structured logging, tracing) and their use with tools such as Prometheus, Grafana and logging stacks
- Experience with industrial/IoT/OT protocols (especially Modbus over TCP) and device-oriented data pipelines is a strong advantage
- Comfortable working in isolated on-prem environments with limited or no direct internet connectivity
- Ability to write clear technical documentation and collaborate effectively with architects, DevOps engineers and internal developers
- Experience with on-premise deployments.
Benefits
- Possibilities to work remote
- A very renowned company
About Hays
IT is and always has been our core business that laid the foundation for Hays' success. We are the biggest privately owned IT recruitment agency in Germany and offer the best jobs for every career level – whether you are interested in vacancies in agile SMEs or international DAX groups. Hays masters the entire IT job spectrum, from support to software architecture or digitalisation – thanks to our broad portfolio, we have something for everyone. In the last decades, we were able to support numerous IT experts with choosing the right path for a successful career, positioning ourselves as their lifelong partner. Our highly specialised consultants can cater to your every wish and expectation and will prepare you for interviews and contract negotiations. Give it a try and learn what the market has to offer – our services are free of charge, non-binding and discreet! We look forward to hearing from you.
Staffing process for freelance specialists
- Analysis of qualifications
- Telephone or personal interview
- Contact with customers
- Contract with Hays
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1. Analysis of qualifications
We carry out a detailed analysis of your technical qualifications on the basis of your CV, your application documents and your profile.
Contact at Hays
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