Full-Stack Developer – Backend & Migration Specialist

Full-Stack Developer – Backend & Migration Specialist

Location: Remote with occasional international travel
Position Type: 40 h / week
This is an initial one-year fixed-term engagement, with the possibility of extension and longer-term collaboration.

Global Standard gGmbH is a self-funded non-profit organisation registered in Germany, dedicated to the development and implementation of Voluntary Sustainability Standards for the textile industry currently through their Global Organic Textile Standard ( GOTS ). The organisation is in the process of developing a second sustainability standard for textiles. Our work focuses on contributing to sustainable development through comprehensive standards that address environmental, social, and economic challenges across the entire textile supply chain.

We are looking for a Full Stack Developer – Backend & Migration Specialist to help review, improve and migrate existing prototype applications into stable, secure and maintainable AWS-based systems.

The main focus of this role is backend development, REST APIs, PostgreSQL implementation, prototype review and application migration. Full stack skills are needed, but frontend work will mainly be required for smaller fixes, interface adjustments and support during the migration.

At the beginning, the developer will review and document existing prototype applications, fix issues where needed, improve workflows and help keep the prototypes running while the migration is taking place.

In the longer term, the role will support the migration of these applications into production-ready systems. This includes reliable PostgreSQL database structures, backend services, documented APIs, secure data handling, logging, audit trails and maintainable code.

The developer will work under technical guidance and with relevant stakeholders to make sure that database structures, application logic, security needs, compliance considerations and operational requirements are properly reflected in the new systems.

The Full Stack Developer will be responsible for:

• Reviewing existing prototype applications, including workflows, permissions, user roles, business logic, data structures and integration points.
• Documenting how the current prototypes work, including workflows, dependencies, data models, technical assumptions and integrations.
• Supporting short-term fixes, calibration, troubleshooting and improvements to keep existing prototypes functional during the migration.
• Developing and implementing PostgreSQL database schemas based on existing prototype data structures and agreed technical requirements.
• Building and maintaining backend services for application logic, data access, integrations and future system extension.
• Developing, documenting and maintaining REST APIs that connect applications, PostgreSQL databases, AI model services and third-party platforms.
• Supporting data migration tasks, including data mapping, transformation, validation checks and quality checks.
• Implementing secure data handling, access controls, validation checks, logging, audit trails and maintainable code structures.
• Making sure that migrated systems are production‑ready, with a strong focus on performance, security, maintainability and scalability.
• Considering relevant compliance requirements during design, implementation and documentation.
• Troubleshooting issues across databases, APIs, backend logic, integrations, prototype workflows, frontend interfaces and AI service connections.
• Preparing clear technical documentation for data models, APIs, integrations, migration logic, dependencies, access‑control logic and handover needs.

The ideal candidate should be:

• Practical and structured, with a hands‑on approach to reviewing, improving and migrating prototype applications.
• Comfortable working across the stack, with a clear strength in backend development, REST APIs, databases and migration work.
• Mid‑level, with around 2–4 years of relevant professional experience in backend development, full stack development, systems integration or application migration.
• Not a complete beginner, but also not necessarily a senior architect.
• Able to…