Senior Product Engineer (AI Agents)
Job description
Build and improve LLM-powered generative AI systems for Cosuno's construction tendering platform, owning features end-to-end from model/agent through API to the TypeScript front-end.
At a glance
- Employment
- Full-time · Employee (employment agreement)
- Work mode
- Remote · Berlin, Germany
- Languages
- English
What you'll do
- Build and improve LLM-powered systems that navigate the complex, often messy tendering workflow
- Own features from model/agent through API to the TypeScript front-end — backend service, API, and integration into the web app
- Work with Product, Engineering, and Data to translate business problems into shipped AI features
What we're looking for
- TypeScript, React, Node: comfortable shipping into the web app end-to-end — front-end, backend service, API
- Strong Python: 5+ years writing production-grade Python, clean and well-structured code
- End-to-end product delivery: shipped AI-powered features into a production web app and owned the integration from research code to real users
- LLM application depth: deep hands-on experience building and deploying LLM/agent systems — RAG, tool use, multi-step reasoning, evals
- Backend engineering skills: design APIs, data pipelines, and services
- Product mindset: comfortable with ambiguity and can judge when something is good enough to ship
- Sharp problem solver: quickly identify what matters in a complex system and decide what to do next
- Bias for action: instinct to find out with data rather than keep wondering
Benefits
- Competitive salary above the market average
- Choose to work 100% remotely or from our modern office in Berlin
- Flexible working hours
- A new MacBook Pro
- Regular company off-sites and team events
- Permanent contract in a stable, well-funded company
Apply
Direct apply at Cosuno
Opens the job posting at Cosuno
About Cosuno
Revolutionizing construction through technology.
Cosuno is a fast-growing tech startup building a digital platform for tenders and procurement processes in the construction industry. Artificial intelligence analyzes millions of price data points and helps construction companies create precise and efficient bids.
Mission
Making the construction industry more efficient and transparent with a digital platform for tenders and procurement processes, solving the most complex challenges in the industry with innovation and simplicity.
Key facts
- Construction technology
- Fast-growing tech startup
- Digital platform for tenders and procurement processes
- AI analyzes millions of price data points to help construction companies create precise and efficient bids
- Trunk-based development with daily releases
- CI/CD pipeline deploys to AWS via Kubernetes, infrastructure managed as code using Terraform
- Comprehensive Cypress E2E test suite
What they value
- Diversity
- Integrative and inclusive work environment
- Collaboration & Transparency
- Quality by Default
- Autonomy
- Bias for action