Senior Backend Developer

Position Overview

Microservice Solutions GmbH is seeking a Senior Backend Developer to design and implement scalable backend systems and APIs for enterprise applications. This fully remote position requires deep expertise in server-side development, microservices architecture, and database design.

Technical Responsibilities

• Design, develop, and maintain RESTful and GraphQL APIs using Node.js, Python, or Java
• Build and optimize microservices architecture with appropriate service communication patterns
• Implement robust authentication and authorization systems (OAuth 2.0, JWT, SAML)
• Design and optimize relational and NoSQL database schemas (PostgreSQL, MySQL, MongoDB, Redis)
• Develop efficient data processing pipelines and background job systems
• Implement comprehensive API documentation using OpenAPI/Swagger specifications
• Write unit, integration, and end-to-end tests to ensure code reliability
• Monitor application performance and implement observability solutions (logging, metrics, tracing)
• Collaborate with frontend developers to define API contracts and data models
• Review code, mentor junior developers, and establish backend development standards
• Optimize database queries and implement caching strategies for high-performance systems
• Ensure security best practices including input validation, SQL injection prevention, and data encryption

Required Technical Qualifications

• Minimum 5 years of professional backend development experience
• Expert-level proficiency in at least one backend language: Node.js (Express, NestJS), Python (FastAPI, Django), or Java (Spring Boot)
• Strong understanding of RESTful API design principles and HTTP protocol
• Extensive experience with SQL databases (PostgreSQL, MySQL) and query optimization
• Proficiency with NoSQL databases (MongoDB, Redis, Elasticsearch) and their appropriate use cases
• Experience with message brokers and event-driven architectures (RabbitMQ, Kafka, Redis Pub/Sub)
• Knowledge of containerization technologies (Docker) and orchestration platforms (Kubernetes)
• Understanding of API security, authentication protocols, and data protection standards
• Experience with cloud platforms (AWS, Google Cloud, or Azure) and serverless architectures
• Proficiency with version control (Git) and CI/CD pipeline implementation
• Strong problem-solving skills and ability to debug complex distributed systems
• Fluent in English (written and verbal); German proficiency is advantageous
• Legal authorization to work in Switzerland or EU

Preferred Technical Qualifications

• Experience with multiple backend frameworks and programming languages
• Knowledge of distributed system patterns: saga, CQRS, event sourcing
• Proficiency with API gateway solutions and service mesh architectures
• Experience with monitoring and observability tools (Prometheus, Grafana, ELK Stack, Datadog)
• Understanding of DevOps practices and infrastructure as code (Terraform, Ansible)
• Knowledge of performance testing and load testing methodologies
• Experience with real-time communication protocols (WebSockets, Server-Sent Events, gRPC)
• Familiarity with search engines and data indexing (Elasticsearch, Algolia)
• Contributions to open-source backend projects or technical publications

Compensation and Working Conditions

• Competitive salary commensurate with experience and Swiss market rates
• Fully remote position with flexible working hours
• Modern technology stack and cloud infrastructure
• Professional development budget for courses, conferences, and certifications
• Opportunity to architect scalable systems and make high-impact technical decisions
• Collaborative engineering culture focused on code quality and system reliability