Senior Full-Stack Engineer

About the Position

Our client is building an AI-powered platform that simplifies financial, accounting, and business operations through modern technology. They are looking for an experienced Senior Full-Stack Engineer to join their engineering team and contribute to the development of a modern greenfield product.

This is a temporary B2B contract position. The initial engagement is project-based, with the possibility of extension depending on project needs and business priorities.

As a Senior Full-Stack Engineer, you will work closely with product managers, designers, and engineers to build scalable, user-focused solutions. You'll take ownership of features from concept to production while contributing to technical decisions and product evolution.

Responsibilities

• Design, develop, and deliver end-to-end product features.
• Build scalable frontend and backend applications using modern web technologies.
• Develop and maintain APIs, data models, and intuitive user interfaces.
• Collaborate with cross-functional teams to deliver high-quality software in short development cycles.
• Contribute to architecture discussions and engineering best practices.
• Write clean, maintainable, and well-tested code.
• Troubleshoot, optimize, and improve application performance.

Requirements

• 5+ years of professional experience building modern web applications.
• Strong experience with TypeScript, React, and Next.js.
• Backend development experience with Node.js, FastAPI, or similar technologies.
• Experience working with PostgreSQL or other relational databases.
• Hands-on experience with Docker and modern deployment workflows.
• Bachelor's or Master's degree in Computer Science or a related field.
• Experience working in agile, cross-functional product teams.
• Strong problem-solving skills and a product-oriented mindset.
• Experience using AI tools as an integral part of the software development workflow.
• Upper-Intermediate (B2) English or higher.

Nice to Have

• Experience working on SaaS products.
• Experience with cloud platforms and modern deployment environments.
• Startup or greenfield product development experience.
• Experience mentoring other engineers.
• German language skills.

We Offer

• Opportunity to work on an innovative AI-driven product.
• Greenfield development using a modern technology stack.
• High level of ownership and technical impact.
• Collaborative international engineering team.
• Competitive B2B compensation.
• Possibility of contract extension based on project needs and performance.

About the Company

Our client is at the forefront of integrating AI into financial, accounting, and business operations, aiming to revolutionize how these sectors operate through cutting-edge technology.