Senior AI Product Engineer

🕒 September 10

🇩🇪 Germany – Remote

💵 €80k - €100k / year

⏰ Full Time

🟠 Senior

🧑‍💻 Full-stack Engineer

👻 Ghost score 4%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Cosuno

WebsiteLinkedInAll Job Openings

51 - 200 employees

🏗️ Construction

☁️ SaaS

💰 $30M Series B on 2022-02

Construction • SaaS

Cosuno is a leading platform for tendering and subcontractor management in the construction industry. The platform enables users to manage the entire planning cycle for projects, from storing documents and sending messages to overseeing the tendering process. Cosuno connects general contractors, project developers, architects, and subcontractors, providing a broad network of qualified subcontractors to ensure efficient procurement processes and cost savings. With features like invoice management, payment facilitation, and comprehensive communication tools, Cosuno aims to simplify and optimize purchasing construction services, increasing transparency and profitability.

📋 Description

• Build and improve LLM-powered systems for complex tendering workflows • Own features end-to-end from model/agent through API to the TypeScript front-end • Build backend services, APIs, and web application integrations • Collaborate with Product, Engineering, and Data teams to turn business problems into AI features • Monitor, alert, and continuously improve production AI systems • Practice trunk-based development with daily releases • Maintain Cypress E2E tests and strict typing, linting, and formatting • Deploy infrastructure to AWS via Kubernetes using Terraform

🎯 Requirements

• TypeScript, React, and Node.js experience • 5+ years writing production-grade Python • Experience shipping AI-powered features into a production web app end-to-end • Deep hands-on experience building and deploying LLM/agent systems, including RAG, tool use, multi-step reasoning, and evals • Backend engineering skills designing APIs, data pipelines, and services • Ability to work comfortably with ambiguity and judge when products are ready to ship • Strong problem-solving skills • Bias for action and data-driven experimentation

🏖️ Benefits

• Choose to work 100% remotely or from the modern office in Berlin • Flexible working hours • New MacBook Pro • Regular company off-sites and team events • Permanent contract in a stable, well-funded company • Competitive salary above the market average