Full-Stack Developer – Backend & Migration Specialist

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.
• Supporting frontend-related tasks where needed, mainly smaller fixes or interface improvements using JavaScript, TypeScript, React, HTML and CSS.
• 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.

Candidates Profile

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 understand existing prototype systems, including workflows, business logic, permissions, data structures and integrations.
• Able to identify technical risks, dependencies and areas for improvement in existing applications.
• Confident asking the right questions to clarify requirements, logic, edge cases and implementation needs.
• Good at documentation, with the ability to clearly describe findings, data models, workflows, APIs, migration logic and handover requirements.
• Able to translate prototype logic into scalable backend and database structures, especially in PostgreSQL-based environments.
• Interested in a long-term role, supporting not only the first migration phase but also future maintenance, improvements and extensions.
• Comfortable with a practical technical assessment as part of the selection process.

Qualifications

• A degree or equivalent practical experience in computer science, software engineering, information systems or a related technical field.
• Practical experience in backend development, full stack development, systems integration or application migration.
• A structured way of understanding existing systems and translating prototype functionality into stable technical solutions.
• The ability to work independently while staying aligned with technical and business stakeholders.
• Strong attention to detail, especially around data quality, permissions, validation logic, integrations and documentation.

Experience & Knowledge

• A degree or equivalent practical experience in computer science, software engineering, information systems or a related technical field.
• Practical experience in backend development, full stack development, systems integration or application migration.
• A structured way of understanding existing systems and translating prototype functionality into stable technical solutions.
• The ability to work independently while staying aligned with technical and business stakeholders.
• Strong attention to detail, especially around data quality, permissions, validation logic, integrations and documentation.

Skills

The candidate should bring:

• Strong analytical and problem-solving skills.
• The ability to review existing prototype logic and turn it into clear technical requirements.
• Practical backend development skills with a focus on maintainability, performance and security.
• Good understanding of relational data modelling and database implementation.
• The ability to build reliable and well-documented REST APIs.
• Clear communication skills, especially when explaining technical findings, risks and dependencies.
• The ability to work with technical leads and stakeholders from technical, product and operational areas.
• A pragmatic mindset when handling short-term fixes while keeping the long-term migration goal in mind.
• The confidence to work across the full stack when needed, while keeping the main focus on backend, APIs and migration.

Why Join Global Standard

• Be part of one of the world’s most respected VSS setter at a time of critical global change.
• Make a meaningful impact on sustainable development.
• Work with a mission-driven,passionate and diverse team.
• Enjoy flexible working arrangements and an environment that values leadership, innovation and impact.
• Take pride in being self-efficient, finding fulfillment and joy

Apply

Interested candidates are invited to submit their application materials to hr@global-standard.org. Please include"Full Stack Developer - Application from [Your Name]”in the subject line. Please submit the following:

• CV/Resume
• Cover Letter
• Any information you think would be most useful for us in understanding your background and accomplishments
• Salary expectations.

Global Standard gGmbH is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.