Backend Application Developer (Core Specialist Tier)

Allps; Basel; On-site; CHF 110,000 - 160,000; Full time

Benefits offered by this job

Competitive salary

Benefits package

Job summary

Allps is seeking an experienced Backend Application Developer to support a long-term Basel project. The role focuses on designing, developing, and maintaining secure, scalable backend systems using .NET Framework/.NET Core, SQL Server, MySQL, and Python within a multi-tier architecture.

The 3-year contract offers extension potential and requires fluent German in interviews. The ideal candidate will implement high-availability services, secure API configurations, and decoupled microservice

Qualifications

• Minimum 3 to 5+ years in enterprise software development with multi-tier server architectures.
• Strong experience with .NET Framework 4.0+, .NET Core, and MySQL; MVC knowledge.
• Secure coding, performance optimization, and full SDLC understanding.

Responsibilities

• Analyse and map business requirements to enterprise backend components.
• Define runtime profiles for high availability and automated horizontal scaling.
• Model relational DB schemas and ORM mappings for performance.
• Develop, test, document, and support RESTful APIs and microservices.
• Implement identity federation using OAuth2, OpenID Connect, and SAML 2.0.
• Manage staging and test environments and automated deployment workflows.
• Provide tier-3 diagnostic support to resolve production defects.

Skills

.NET Framework

.NET Core

MySQL

MVC

SQL Server

Python

APIs

Security

Performance

Teamwork

Job description

Backend Application Developer – Core Specialist Tier

Location: Basel, Switzerland
Contract Duration: 3 years, with possible extension
Experience 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.

Requirements

Required Skills & Experience

• Minimum of 3 to 5+ years of demonstrable enterprise software development tenure in multi-tier server architectures.
• Strong experience with .NET Framework, including .NET Framework 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 software development lifecycle practices.
• Ability to work independently as well as part of a distributed project team.

Languages : Flawless bilingual/native-level business German communications proficiency (C1/C2 level written and spoken) is required. The candidate must present seamlessly in German during the technical panel interview (Anbieterfachgespräch).

• Swiss Compliance : Must hold EU/EFTA nationality or possess an active, valid Swiss permanent residency/work card (C Permit or unrestricted B/G Permit).

What We Offer:

• * Opportunity to work on challenging projects and contribute to the growth of our company
• * Collaborative and dynamic work environment
• * Professional development and growth opportunities
• * Competitive salary and benefits package

Recruitment Process – AI Screening with TARA

• As part of our recruitment process, candidates may be invited to complete an initial AI-powered screening with TARA, the interview agent.
• TARA helps us make the hiring process faster, fairer, and more consistent by asking structured, role-relevant questions based on the job requirements. The interview is designed to understand your experience, skills, motivation, and suitability for the role.

The AI screening interview may include:

• Questions about your professional background and relevant experience
• Role-specific technical or functional questions
• Questions about your motivation, availability, and communication skills
• The interview can usually be completed online in 15-20 minutes at a time that is convenient for you. Your responses will be reviewed as part of the overall selection process, together with your CV, application details, and any follow-up interviews with the hiring team.

Candidate Experience.

• We use AI to support the recruitment process, but final hiring decisions are made by people. Human recruiters and hiring managers remain involved in reviewing candidates and making selection decisions.
• We are committed to a transparent, respectful, and fair candidate experience. Your data will be handled confidentially and in accordance with applicable data protection requirements.

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