Senior Backend Engineer, Applied AI Track

Jobtailor; Leipzig; Vor Ort; EUR 90.000 - 120.000; Vollzeit

Zusammenfassung

Jobtailor in Leipzig, Germany seeks an experienced backend engineer to design, implement, and ship features focusing on backend and AI functionality, including RAG pipelines and LLM integrations.

You will collaborate with Product, DevOps, and customer-facing teams to translate requirements into robust production systems, while maintaining strong observability and secure development practices. Progressively taking ownership of AI-related work is expected.

Qualifikationen

• Significant senior-level backend engineering experience building and operating production systems end-to-end.
• Strong backend skills in TypeScript, or Go/Java/Rust with solid TypeScript fundamentals.
• Proven track record shipping production REST APIs with versioning and error handling.

Aufgaben

• Design, implement, and ship features for backend and AI functionality.
• Build and iterate RAG pipelines and LLM integrations.
• Develop evaluation approaches including quality gates and observability.

Kenntnisse

Backend Engineering

TypeScript

REST API

SQL PostgreSQL

Observability

Secure Development

LLM Integration

Ownership Mindset

Clear Communication

Adaptability

Leadership

Tools

Grafana

Sentry

PostHog

Supabase

Jobbeschreibung

• Design, implement, and ship features from discovery through production rollout, focusing on backend and AI functionality


• Build and iterate on RAG pipelines, retrieval strategies, and LLM integrations, balancing quality, latency, and cost


• Build evaluation approaches for LLM features, including quality gates, regression detection, and observability


• Scout new technologies and approaches and translate findings into production-ready solutions


• Collaborate with Product, DevOps, and customer-facing teams to turn requirements into maintainable software


• Contribute to engineering standards, code reviews, and the team's technical direction


• Begin with backend-focused contributions and progressively take ownership of AI-specific work

Requirements

• Significant senior-level experience as a backend engineer designing, shipping, and operating non-trivial production systems end-to-end


• Strong backend engineering skills in TypeScript, or Go, Java, or Rust plus solid TypeScript fundamentals


• Ability to contribute productively in a TypeScript codebase from day one


• Deep experience designing and shipping production REST APIs, including versioning, error handling, and backwards compatibility


• Strong SQL skills, ideally PostgreSQL in production, including schema design, performance tuning, and safe schema evolution


• Practical experience debugging production systems with observability tools such as Grafana, Sentry, PostHog, or equivalents


• Ability to follow secure development best practices


• Hands-on experience working with LLMs and first exposure to RAG or retrieval concepts


• Basic working understanding of how LLM and RAG applications are built


• Genuine interest in applied AI and motivation to develop deep expertise


• Fluent in English


• Strong ownership mentality and senior judgment


• Ability to communicate clearly with technical and non-technical stakeholders


• Comfortable working in a fast-moving startup environment with ambiguity and shifting priorities


• Nice to have: experience with Supabase


• Nice to have: experience with document analysis pipelines and preprocessing for retrieval


• Nice to have: experience with automated evaluation and testing for LLM features


• Nice to have: technical leadership, mentoring, setting standards, or leading cross-cutting initiatives

Core Competencies

Demonstrates strong backend engineering capabilities with significant experience in TypeScript, REST API design, and production systems. Possesses a deep understanding of LLMs and retrieval strategies, along with the ability to collaborate effectively across teams in a dynamic environment.

Highest-signal resume keywords

• Backend Engineering


• TypeScript Development


• REST API Design


• SQL Proficiency


• LLM Integration

ATS Optimization Keywords

Hard Skills

• TypeScript


• Go


• Java


• Rust


• SQL


• PostgreSQL


• REST API Design


• Debugging


• Observability


• Secure Development

Soft Skills

• Strong Ownership Mentality


• Clear Communication


• Adaptability

Industry Keywords

• AI Functionality


• RAG Pipelines


• Production Systems


• Quality Gates


• Regression Detection

Tools & Technologies

• Grafana


• Sentry


• PostHog


• Supabase