Allps
Backend Application Developer (Core Specialist Tier)
3-year contract (extendable) backend developer role in Basel building secure, scalable enterprise backend applications for an energy-sector project. Core stack: .NET Framework/.NET Core, Microsoft SQL Server, MySQL, Python, REST/SOAP APIs, OAuth2/OpenID Connect/SAML. Requires fluent business German (C1/C2) and Swiss/EU work authorization.
- Compensation
- Not disclosed
- Location
- Basel
- Work setup
- Not specified
- Seniority
- Not specified
- Employment
- Contract
- Experience
- 3+ years
- Category
- Backend
- Posted
Skills
Must have
- 3-5+ years enterprise software development in multi-tier server architectures
- Industry experience in Utilities & Energy, Telecommunications, Banking & Financial Services, or IT & Services
- Strong experience with .NET Framework (incl. 4.0), .NET Core, MySQL
- Good knowledge of MVC architecture
- Strong database experience with Microsoft SQL Server
- Working knowledge of Python
- Experience developing APIs, backend services, and enterprise applications
- Good understanding of secure coding, performance optimisation, and SDLC practices
- Ability to work independently and as part of a distributed project team
- German business proficiency C1/C2 (written and spoken), presented in the technical panel interview
- EU/EFTA nationality or valid Swiss work authorization (C Permit or unrestricted B/G Permit)
Nice to have
- Identity federation experience binding endpoints to OAuth2, OpenID Connect, SAML 2.0
Full description
Backend Application Developer – Core Specialist Tier
Location: Basel, SwitzerlandContract Duration: 3 years, with possible extensionExperience Required: 3+ years.Industry Experience: Utilities & Energy(Energie & Wasserversorgung) or Telecommunications or Banking & Financial Services or Information Technology & Services
Role Overview
We are looking for an experienced Backend Application Developer to support a long-term enterprise project in Basel. This is a 3-year contract role with the possibility of extension.The ideal candidate will have strong hands-on experience in designing, developing, and maintaining secure, scalable, and high-performance backend applications. The role requires solid expertise across Microsoft and open-source technologies, including .NET Framework, .NET Core, Microsoft SQL Server, MySQL, Python, and MVC architecture.Strategic Scope: Responsible for the rigorous structural translation of complex technical business processes and energy-sector transactions into scalable, highly available object-oriented server designs, secure multi-tier logical services, integrated API configurations, and decoupled microservice patterns.
Tasks
Core Responsibilities
- Requirement Extraction: Systematically analyse, document, and map granular business requirements to engineer structural software components, robust middleware layers, and complete enterprise backend applications.
- Architectural Design: Define and implement strict functional and non-functional runtime profiles, including high availability, automated horizontal scalability, enterprise-grade security protocols, and minimal processing latency parameters.
- Data Modeling: Conceptualise, construct, and manage normalized and denormalized relational database schemas, complex entity relationship models, and performance-tuned object-relational mapping configurations.
- Web Service Implementation: Build, test, document, and support enterprise web service integrations utilizing asynchronous RESTful APIs, high-security SOAP communication paths, and structured microservices architecture layouts.
- Access & Federation Protocols: Configure and map identity federation integrations across legacy and modernized components by binding application endpoints strictly to modern access frameworks (OAuth2, OpenID Connect, SAML 2.0).
- Environment Deployment Support: Manage, maintain, and provision isolated localized, staging, and continuous testing application runtime environments, orchestrating automated system packaging and localized deployment workflows.
- Defect Analysis & Root-Cause Remediation: Provide critical tier-3 engineering diagnostic support, proactively profiling running server systems to detect, reproduce, isolate, and permanently resolve complex technical defects within high-load production software systems.