Senior Backend Engineer AI Applications (m/f/d)

turnus.ai; Berlin; Remote; EUR 85,000 - 120,000; Full time

Benefits offered by this job

Competitive Salary & Equity

Flexibility & Remote Culture

Impact & Ownership

Growth & Learning

Dynamic Team

Job summary

A technology company in Berlin is seeking a Senior Backend Engineer to contribute to AI applications. The role involves developing features using Python/FastAPI, improving AI models, and designing integrations. Ideal candidates have strong backend development skills and experience in AI/ML. The position offers a competitive salary, remote work flexibility, and opportunities for professional growth.

Qualifications

• Deep experience in backend development with Python or TypeScript/Node.js.
• Hands-on experience with LangChain, RAG systems, and LLM deployments.
• Skilled in API design and data pipelines.
• Understanding of cloud architectures and microservices.
• Worked on B2B SaaS applications addressing security and scalability.
• Experience with SaaS applications, security, multi-tenancy, and scalability.

Responsibilities

• Develop features and prototypes using Python/FastAPI.
• Enhance AI models through data engineering.
• Design secure, scalable APIs and integrations.
• Deploy features from prototype to production.
• Ensure backend architecture remains performant.
• Partner with product and frontend teams to shape the technical roadmap.

Skills

Python

FastAPI

AI/ML

Data aggregation

Docker

API development

AWS

Tools

Docker

AWS Lambda

FastAPI

GitHub Actions

Postgres

OpenSearch

AWS CDK/CloudFormation

Job description

Senior Backend Engineer AI Applications (m/f/d)

We are redefining how suppliers meet the compliance requirements of their business customers. Our mission is to put the tedious and error-prone communication of compliance data on autopilot. Our AI systems handle the manual and repetitive tasks for our customers, allowing them to focus on their core business.

Our engineering team is at the heart of this mission. We are building a forward-thinking platform that doesn't just process data, but learns, anticipates, and automates. If you want to thrive in a dynamic, tech-driven environment and help shape a product that makes a real difference, you've come to the right place.

Tasks

We are looking for a visionary Senior Backend Engineer (m/f/d) with a passion for artificial intelligence and a drive to solve complex problems. You will play a pivotal role in developing an intelligent infrastructure that automatically aggregates data from diverse sources to accurately answer compliance questions. We’re focusing on practical implementation over lengthy planning cycles. We value engineers who can balance speed with quality and take ownership of their work. You will fundamentally shape the architecture of our AI applications, enhance our models, and build scalable integrations that guarantee a seamless service for our customers. Your work will directly contribute to transforming an entire industry.

Your tasks

Architect, Build and iterate quickly: Develop features and proof‑of‑concepts using Python/FastAPI, test with real users, and scale what works.

• Enhance Our AI Models: Collaborate closely with our AI specialists to continuously improve and fine‑tune our models (especially LLMs) through smart data engineering, GenAI evaluation techniques and feedback loops.
• Build Scalable Integrations: Design and implement secure, scalable APIs and integrations with third‑party systems (e.g., ERPs, PIMs, customer platforms) to ensure a seamless flow of data.
• Ship features end-to-end: From initial prototype to production deployment using AWS CDK/CloudFormation and GitHub Actions.
• Ensure Scalability and Performance: Take ownership of the backend architecture, ensuring our AI applications remain performant and secure as data volumes and user numbers grow.
• Collaborate on Product Innovation: Work closely with product management and the frontend team to bring innovative, AI‑powered features from idea to production and help shape the technical roadmap.

Requirements

Excellent Backend Expertise: Deep, hands‑on experience in backend development, ideally with Python or TypeScript/Node.js. You write clean, maintainable, and well‑tested code.

• Strong implementation focus: You prefer writing code to lengthy discussions and can quickly turn ideas into working prototypes.
• Solid AI/ML experience: Hands‑on experience with LangChain, RAG systems, and production LLM deployments.
• Data and API Proficiency: Skilled in designing and developing APIs (FastAPI, REST) and have experience with data aggregation, ETL processes, or data pipelines.
• Architectural Mindset: Understanding of cloud architectures (e.g., GCP, AWS) and microservices, design scalable and resilient systems.
• SaaS Experience: Worked on B2B SaaS applications and understand security, multi‑tenancy, and scalability challenges.
• "You build it, you run it" mentality: Ownership, proactive, drive to develop features to perfection and deploy successfully.
• Fluent in English: Our company language is English to ensure seamless communication. German language skills are a plus but not required.
• Techstack:
  Backend: Python, FastAPI, Docker, AWS Lambda
  Frontend: React, TypeScript, Tailwind
  AI/ML: LangChain, GenAI, RAG, Ragas, PyTorch/Tensorflow
  Database: Postgres, OpenSearch
  Cloud: AWS
  DevOps: GitHub Actions, AWS CDK/Cloudformation

Benefits

• Competitive Salary & Equity: Your contribution will be rewarded fairly, and you will participate directly in the success of our company through equity options.
• Flexibility & Remote Culture: Work fully remote (within CET ± 2 hours timezone).
• Impact & Ownership: Shape a core product from the ground up and see the direct impact of your work on our customers and the market.
• Growth & Learning: We support your professional development with a generous budget for conferences, courses, or books.
• Dynamic Team: Become part of a highly motivated team that is passionate about its mission and fosters a culture of open exchange and collaboration.

Seniority level

• Mid-Senior level

Employment type

• Full‑time

Job function

• Information Technology
• IT Services and IT Consulting

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