Key Responsibilities
Flask Application & REST API

• Design, build, and maintain the Flask application core using clean, modular architecture.
• Develop and document RESTful API endpoints consumed by the frontend and third-party integrations.
• Implement versioning, error handling, and input validation across all endpoints.

Business Logic & Service Layer

• Translate product and functional requirements into robust service-layer components.
• Implement background processing, async task management, and scalable service patterns.
• Collaborate with AI developers to expose ML model outputs via clean API contracts.

Database Design & Multi-Tenancy

• Own the PostgreSQL schema design and evolve it via Alembic migration scripts.
• Implement multi-tenancy logic to ensure data isolation across VTU customer and internal tenants.
• Optimise queries, indexes, and connection pooling for production-scale workloads.

Azure Blob Storage Integration

• Integrate Azure Blob Storage into the backend for file upload, retrieval, and lifecycle management.
• Implement secure, signed URL patterns and storage access policies.
• Manage storage account configuration, container structure, and cost-efficient retention policies.

Ideal Candidate
We are looking for a motivated and detail-oriented Backend & API Developer who is passionate about building scalable applications, designing robust APIs, and working with modern cloud technologies. You enjoy solving complex technical challenges, writing clean and maintainable code, and collaborating with cross-functional teams to deliver high-quality solutions.
To be successful in this role, you should have:

• At least 3 years of professional experience in backend software development using Python and Flask or a similar framework.
• Strong experience designing, developing, and maintaining RESTful APIs.
• Solid knowledge of PostgreSQL, database design, query optimization, and data modeling.
• Hands-on experience with SQLAlchemy and database migration tools such as Alembic.
• Experience working with cloud-based services, preferably within the Microsoft Azure ecosystem.
• Understanding of software architecture principles, application performance, and API security best practices.
• Strong analytical thinking, problem-solving skills, and attention to detail.
• The ability to work both independently and collaboratively within an international team environment.
• Good communication skills and professional proficiency in English.

Nice to have:

• Experience with Azure Blob Storage, Azure App Services, Azure Container Apps, or Docker-based deployments.
• Knowledge of OAuth 2.0, Azure Entra ID, and authentication/authorization concepts.
• Familiarity with FastAPI or other modern Python frameworks.
• Exposure to AI/ML-powered applications or integrating AI services into enterprise solutions.

VTU Engineering is developer, engineer and supplier of processing plants in the chemistry & metallurgy, oil & gas as well as pharmaceutical industries. The work focuses on process engineering and project management from the conceptual design to a successful start-up. Furthermore, VTU Engineering delivers turn-key, customized solutions, e.g. for solvent recovery or industrial wastewater treatment.