04/06/2026 updated
100 % available
Senior Software Engineer - Backend & System Integration
Singapore, Singapore
Only remote
M.Sc. Computer ScienceAbout me
Senior Backend Engineer with 10+ years in the Microsoft stack. I specialize in C#/.NET, ERP integrations (4Sellers, Sage 100, SAP), and scalable API design. Based in Singapore, working remotely with clients across Europe and APAC. Clean code, clear communication, reliable delivery.
Backend Development
Expertise in designing and delivering scalable backend systems using C#, .NET Framework, ASP.NET Core, and Python with over 10 years of experience
Cloud Architecture
Proficiency in Azure cloud services including App Services, Functions, Service Bus, DevOps, Docker, and Kubernetes for enterprise solutions
ERP Integration
Specialized knowledge in SAP Business One, Sage 100, 4Sellers, Dynamics 365, and REST/SOAP APIs for enterprise system connectivity
Database Management
Advanced skills in MS SQL Server, PostgreSQL, MongoDB, Redis, and Elasticsearch for data storage and retrieval optimization
Microservices Architecture
Experience with event-driven architecture, CQRS, Domain-Driven Design, and clean architecture patterns
API Development
Proficiency in building RESTful APIs with high performance serving 50K+ daily requests with sub-100ms response times
DevOps Tools
Knowledge of Git, Jira, Confluence, Swagger/OpenAPI, RabbitMQ, and Kafka for development workflow optimization
Programming Languages
Multi-language expertise including TypeScript, JavaScript, SQL, Go, and Python for diverse development needs
Expertise in designing and delivering scalable backend systems using C#, .NET Framework, ASP.NET Core, and Python with over 10 years of experience
Cloud Architecture
Proficiency in Azure cloud services including App Services, Functions, Service Bus, DevOps, Docker, and Kubernetes for enterprise solutions
ERP Integration
Specialized knowledge in SAP Business One, Sage 100, 4Sellers, Dynamics 365, and REST/SOAP APIs for enterprise system connectivity
Database Management
Advanced skills in MS SQL Server, PostgreSQL, MongoDB, Redis, and Elasticsearch for data storage and retrieval optimization
Microservices Architecture
Experience with event-driven architecture, CQRS, Domain-Driven Design, and clean architecture patterns
API Development
Proficiency in building RESTful APIs with high performance serving 50K+ daily requests with sub-100ms response times
DevOps Tools
Knowledge of Git, Jira, Confluence, Swagger/OpenAPI, RabbitMQ, and Kafka for development workflow optimization
Programming Languages
Multi-language expertise including TypeScript, JavaScript, SQL, Go, and Python for diverse development needs
Languages
GermanFluentEnglishNative speaker
Project history
Designed ERP integration layers, built microservices architecture, developed RESTful APIs, optimized database performance, and led migration projects from legacy systems to modern cloud platforms
Architected backend platform for B2B SaaS product, integrated SAP Business One with Dynamics 365, implemented event-driven architecture, and mentored junior developers
Developed backend services for logistics platform, built REST APIs and Windows Services, created reporting dashboards, and participated in Agile/Scrum processes