Key Facts

Remote From:

Full time

Senior (5-10 years)

German

Hard Skills

Agent-Based Model Python (Programming Language) Tool Management Evaluation Strategy Telemetry Conversational AI Multi-Agent Systems TypeScript Deep Learning Cross-Functional Collaboration Product Knowledge

Other Skills

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Communication
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Dealing With Ambiguity
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Teamwork
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Problem Solving

Roles & Responsibilities

Strong engineering background with 5+ years of production-grade Python experience and solid software design
Deep expertise in LLM applications, including agent architectures, advanced RAG strategies, and state/context management
Product mindset with comfort navigating ambiguity and shipping solutions that are good enough
Bonus skills: German language for debugging domain-specific conversations, TypeScript experience for frontend integration, and classical ML/deep-learning knowledge for model optimization

Requirements:

Architect and lead the technical development of an agent-based AI assistant for construction professionals, including tool use, RAG pipelines, guardrails, and sub-agent orchestration
Master context and memory to ensure coherent, long multi-turn interactions
Own the feedback loop: implement online and offline evaluation frameworks to balance latency, cost, and quality; collaborate with Product and Engineering to translate ambiguous business problems into concrete technical solutions
Ensure production-grade engineering: write clean Python code, establish observability, and explore future capabilities including multimodal inputs (e.g., visual plans)

Cosuno

Construction & Civil Engineering

About Cosuno

Cosuno ensures efficient and transparent collaboration between all parties involved in the construction industry from planning to payment. Customers benefit from involving subcontractors in planning at an early stage, finding the right prices on a data-driven basis, and being able to pay more quickly via the software. The benefits and savings for both sides are immense: by using Cosuno’s cloud solution instead of email, phone, and Excel spreadsheets, the time saved amounts to about 60% and the profit margin is 18% higher on average. The customers use the largest European subcontractor network for this purpose and benefit from the specially developed AI, which ensures significantly better capacity utilization. Cosuno is growing fast: since its market launch, the software has already processed a $4 billion construction volume. The new capital will flow into the development of further features and international expansion, beginning first in Europe.

Company type: Scaleup

Industry: Construction & Civil Engineering

Founded: 2018

Company size: 51 - 200

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Job description

Your mission

Architect our core AI assistant: Lead the technical development of an agent that helps construction professionals process, improve, and validate complex construction documents.
Engineer robust agentic workflows: Own tool use, complex RAG pipelines, guardrails, and sub-agent orchestration.
Master context and memory: Solve state-management challenges to ensure coherent, long multi-turn interactions.
Own the feedback loop: Implement online and offline evaluation frameworks to balance latency, cost, and quality.
Drive product impact: Work with Product and Engineering to turn ambiguous business problems into concrete technical solutions.
Production-grade engineering: Write clean Python code and establish observability so agents are reliable in production.
Explore future horizons: Identify opportunities to expand capabilities, for example with multimodal inputs like visual plans.

Your profile

Strong engineering background: 5+ years of experience with production-grade Python and solid software design.
Deep expertise in LLM applications: Experience with agent architectures, advanced RAG strategies, and state/context management.
Product mindset: Comfortable with ambiguity and able to judge when to ship something that is good enough.
Bonus skills:
- Good understanding of German to debug domain-specific conversations.
- TypeScript experience for frontend integration.
- Classical ML or deep-learning knowledge for model optimization.

Why us

Shape a product that solves real-life problems in the construction industry
Work in an open-minded, collaborative, dynamic, and international team
Fully remote team and work culture
Freedom in your working hours. It's the results that count.
Company off-sites and regular team events (offline and online)
Flexible working conditions with the possibility to do workations
Competitive compensation, a permanent contract, and modern work equipment
Open feedback culture with regular 1-on-1s

About us

Cosuno – Revolutionizing construction through technology.

We are Cosuno – a fast-growing tech startup that is making the construction industry more efficient and transparent with our digital platform for tenders and procurement processes. Our goal: to solve the most complex challenges in the industry with innovation and simplicity.

Why Cosuno?

Artificial intelligence is the key to our solution: it analyzes millions of price data points and helps construction companies create precise and efficient bids. This not only saves our customers time but also helps them avoid unnecessary costs.

But for us, it's not just about technology – it's about the people who drive it. At Cosuno, you will work with creative minds who are reshaping the construction industry. We believe in diversity because we know that the best ideas come from different perspectives. An integrative and inclusive work environment is a matter of course for us.

Join us – Build the future of construction.

Ready to apply?

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