Senior Full Stack Developer

Freelance Full Stack Developer (AI-Driven Automation) – Insurance

Engagement: Freelance / Contract (initial 6 months, when all goes well we extend to permanent)

Work setup: Remote (Must be avaialbile for calls Berlin 9:00-18:00)

Start: ASAP

Commitment: Full time is required

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Project Overview

We're building AI-driven automation for complex insurance workflows, from early prototypes to production-ready systems.

Over the next ~10 months, we'll validate core technology and scale it toward a standalone spin-out company.

We're looking for a senior freelance Full Stack Developer who combines strong technical execution with deep business understanding.

You'll work directly with our Senior AI CTO and engineering leadership in a highly autonomous environment.

In today's world of Cursor, Claude, and AI-assisted coding, raw syntax knowledge is no longer the differentiator. The most important skill we evaluate is your ability to:

• Quickly understand what the business actually needs
• Reason about how customers think and behave
• Translate vague, high-level goals into clear technical requirements and shipped systems ⸻

How We Think About This Role

We can test technical skills relatively easily — and we will, to verify your claimed background.

However, the majority of our hiring decision is based on:

• Business understanding
• Ability to work with very little direction
• Ownership mindset and personal working attitude The key question we ask ourselves is: Is this someone we can give a high-level business problem to — and trust that one month later there's a working prototype, and three months later it's something we can put in front of real customers?

If that framing excites you, this project is likely a good fit.

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What You'll Be Working On

• Turning loosely defined business problems into concrete technical solutions
• Designing and building backend and full-stack services using TypeScript, , and
• Creating AI-powered workflow automation using frameworks like Mastra, LangChain, or similar
• Integrating and experimenting with leading LLMs (Claude, ChatGPT, Gemini) and routing platforms such as OpenRouter
• Building observability and evaluation into AI systems (LangSmith, Langfuse, LangWatch, or custom tooling)
• Deploying and maintaining cloud infrastructure on AWS and/or GCP
• Working with serverless architectures (e.g. AWS Lambda)
• Managing infrastructure via infrastructure-as-code (CloudFormation; Terraform a plus)
• Setting up and improving CI/CD pipelines
• Prototyping quickly, shipping iteratively, and refining based on real customer and stakeholder feedback
• Collaborating directly with the CTO on architecture, AI strategy, and long-term technical direction
• Developing a working understanding of insurance workflows and translating domain complexity into scalable systems

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What We're Looking For

• Strong experience with TypeScript, , and modern web/backend frameworks
• Hands-on experience with , serverless systems, and cloud-native development
• Experience with AI orchestration frameworks (LangChain, Mastra, or equivalents)
• Practical experience working with modern LLMs and multi-model setups
• Solid knowledge of AWS and/or Google Cloud Platform
• Experience with CI/CD, automated testing, and deployment workflows

Equally important (and what we care most about):

• Proven ability to understand business context quickly
• Comfort working from ambiguous, high-level requirements
• Strong product and customer intuition — you think in terms of users, workflows, and outcomes
• Ability to turn minimal direction into:
• clear technical plans
• fast prototypes
• production-ready systems
• High ownership and reliability in a remote, async-first setup
• Comfortable using AI tools daily as part of your development and thinking process
• Clear, structured communication in English (German is HUGE plus all the test data is in German)

Job Types: Full-time, Permanent, Freelance

Contract length: 24 months

Pay: From ₹99,000.00 per month

Benefits:

• Flexible schedule
• Work from home

Work Location: Remote