Job description
Holycode is looking for a Fullstack Engineer - Prototyping & AI Integration to join our CASUS team. CASUS simplifies legal compliance with AI-powered tools. Their mission is to make complex workflows intuitive and efficient for businesses worldwide. Founded in 2019, they are a fast-growing team of engineers, lawyers, and designers based in Zurich.
CASUS stands for a new generation of legal work: practical rather than theoretical, integrated rather than isolated, securely hosted in Switzerland and consistently designed for efficiency and quality.
Intro:
At CASUS, they are building AI-powered tools to revolutionize legal and compliance workflows. They are looking for a Fullstack Engineer with a hacker’s mindset to join their team.
They optimize their development process for AI-assisted engineering — most of their code is generated with AI, and your role is to guide it, validate it, and deliver production-quality features quickly.
In this role, you’ll design, prototype, and ship features that leverage their modern tech stack (Node.js, TypeScript, React, Firestore, Google Cloud, and Azure LLMs).
You’ll thrive if you:
- Love building from 0 to 1 and validating ideas quickly.
- Have a fullstack skillset, enjoying collaborating across the stack.
- Are curious about AI integration (e.g., LangChain, Azure LLMs) and want to push boundaries.
- Prefer startup speed over corporate processes.
This role is ideal for someone who wants to shape a product, work with cutting-edge tech, and see their code in the hands of real users - fast.
Tasks:
- Prototyping: Rapidly validate new features (e.g., AI agents, Word Add-ins) with POCs
and iterate based on feedback.
- AI Integration: Experiment with AI frameworks (LangChain, Azure LLMs) to enhance their
product’s capabilities.
- Backend Development: Build and maintain scalable APIs, database schemas
(Firestore), and cloud services (Google Cloud).
- Frontend Development: Work on frontend components (React, TypeScript)
- Testing & QA: Ensure code quality with automated tests and contribute to their CI/CD
pipelines.
- Ownership: Take end-to-end responsibility for features, from design to deployment.
Requirements:
- Essential:
- 3+ years of Fullstack development with a backend focus (Node.js, TypeScript).
- Comfortable working with AI-assisted development and evaluating, refining AI-generated code
- Experience with NoSQL databases (Firestore or similar) and cloud platforms (Google
- Cloud/Azure).
- Prototyping skills: Ability to build quick POCs (proof-of-concept) and iterate.
- Startup mentality: Comfortable with ambiguity and building products from scratch.
- Collaboration: Enjoy working in cross-functional teams and mentoring others.
- Preferred:
- Experience with AI agent frameworks (LangChain, etc.) or Office.js (Word Add-ins).
- Knowledge of legal/Compliance-tech or similar domains.
- German language skills (not required).
- Soft Skills:
- Proactive and curious – you love solving problems creatively.
- User-focused – you care about building products that people actually want to use.
What We Offer
- Impact: Your work will directly shape a product used by thousands of legal professionals.
- Tech Stack: Modern tools (TypeScript, React, Node.js, Google Cloud, AI APIs).
- Culture: Flat hierarchies, fast decisions, and a people-first approach.
- Growth: Opportunities to learn and experiment with AI, scalability, and cutting-edge tech.
- Healthy employees: We feel good when you feel good. That’s why we promote a good work-life balance
- Private health insurance
- Flexible work model – hybrid or full remote
- Equipment of your choice (laptop, monitor, accessories)
- High-growth company with innovative products
- Supportive, international team
- Budget for professional development (courses, books, conferences)
- English and German language lessons during working hours
- Nice office in Belgrade with a stocked kitchen and game area
- Opportunity to learn, grow, and make a real impact
If you are looking for an environment where you can grow professionally, learn from the best in the field, balance work and life habits and have a pleasant and enthusiastic environment, please submit your CV in English.
