Back-End Engineer (AI/ Legal Tech)

Saga is a legal innovation company building AI-driven legal workflows. As a Back-End Engineer, you will design and build TypeScript/Node.js REST APIs, data models, and systems for document processing, semantic search, and RAG-based capabilities.

• Design, build, and maintain back-end services, REST APIs, and data models using TypeScript and Node.js
• Develop document ingestion, processing, semantic search, vector search, and RAG-based systems leveraging LLMs from providers such as OpenAI, Anthropic, and Google
• Build and operate asynchronous processing pipelines, background workers, and long-running jobs
• Improve performance, reliability, scalability, and security across distributed, multi-tenant systems and databases
• Collaborate with engineering, legal, and product teams to deliver customer-facing features and contribute to architectural decisions
• Monitor, maintain, and continuously improve production systems and platform capabilities

• 3+ years of professional backend engineering experience with TypeScript and Node.js
• Strong understanding of APIs, databases, distributed systems, and backend architecture
• Experience designing and implementing solutions within existing production codebases
• Experience operating and supporting backend services in production environments
• A strong ownership mindset with a focus on reliability, maintainability, and continuous improvement
• Clear written and verbal English communication skills and the ability to collaborate effectively across teams

• A salary package between €3,000–€5,000 gross per month (all-inclusive, based on a 40-hour work week)
• A chance to build the learning foundation for one of Europe's fastest-growing AI companies serving clients globally
• Autonomy to build and experiment, with direct impact on company strategy and client success
• An international team that moves fast, thinks clearly, and builds with care