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# Senior Software Engineer - Fullstack

- **Company:** Voyfai
- **Location:** Berlin, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, JavaScript (Programming Language), Artificial Intelligence, Amazon Web Services, Continuous Integration, DevOps, PostgreSQL, Software Architecture, Software Engineering, SQL Databases, Systems Architecture, TypeScript, Software Organization, Large Language Models, Reliability of Systems, Technical Debt, Backend, Information Technology, Front End Software Development
- **Published:** July 22, 2026
- **Apply:** https://www.adzuna.de/details/5509259904

## About the Role

* 5+ years of professional software engineering experience, with strong backend architecture skills and comfort across the full stack
 * Solid command of JavaScript or TypeScript across both backend and frontend contexts
 * Experience with SQL databases, preferably PostgreSQL
 * Hands-on experience deploying and operating applications on cloud platforms like AWS or GCP
 * Familiarity with DevOps, CI/CD pipelines and modern software development practices
 * Clear communication skills and the ability to collaborate effectively with technical and non-technical stakeholders
 * A proactive, ownership-driven mindset suited for fast-paced startup environments

## Description

We are seeking an experienced Senior Software Engineer (m/f/d) to play a key role in building the core infrastructure of our logistics platform. In this role, you will work closely with AI engineers and product stakeholders to define system architecture, integrate with transport management systems, and develop customer-facing features powered by large language models. Your work will be critical in shaping our engineering practices and establishing a scalable foundation for future product development over the next 12 months., * Design and develop scalable software solutions with a strong focus on system architecture and clean code

 * Build and optimize integrations with transport management systems and third-party logistics platforms
 * Collaborate with AI engineers to deliver customer-facing features powered by large language models
 * Improve system reliability, maintainability and scalability by addressing technical debt and evolving the tech stack
 * Work with PostgreSQL to ensure data consistency, integrity and performance
 * Leverage cloud platforms such as AWS or GCP to support infrastructure and deployment
 * Contribute to DevOps and CI/CD practices to improve release speed and operational stability
 * Occasionally support customers directly, helping translate their needs into product and engineering solutions


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