Backend Developer

Location: IL (IL)

Description

About Black Rabbit

Black Rabbit is the leading online seller of commercial airline tickets in Israel (B2C), operating multiple brands — most notably Alice.co.il. We are one of only eight companies worldwide working directly with Google Flights, reflecting our strong market position and technical capabilities.

Over the past two years, Black Rabbit has expanded into the B2B space and is currently building a new Corporate Travel product. Our innovative approach sets us apart in a traditionally conservative industry, and we are proud to be both profitable and forward-thinking. We foster a youthful, dynamic, and collaborative work environment.

Requirements

Senior Back-End Engineer

About the Role

We are looking for a talented Senior Back-End Engineer to join our small, agile team in a fast-paced CI/CD environment. You will own features from conception to post-deployment, working closely with Product and Design to scale our architecture and build seamless user experiences.

You will also play a key role in integrating modern AI capabilities—specifically leveraging Anthropic’s Claude—to build intelligent, reliable features directly into our core product.

Our Tech Stack: C#, .NET 8, React.js, Redux, Azure, Redis, SQL Server, Snowflake.

What You’ll Do

• Scale & Evolve: Architect and build high-performance APIs and distributed services using C# and .NET 8.
• Deliver End-to-End: Take full ownership of features in a continuous delivery environment.
• Integrate Smart Features: Collaborate on implementing LLM capabilities (like Claude) to power new, user-facing AI features.
• Focus on Quality: Write clean, simple, and highly maintainable code alongside a talented peer group.

Experience & Skills

• Core Back-End: 3+ years of professional development experience with deep expertise in the C#/.NET ecosystem.
• AI & LLM Integration (Bonus/Plus): Hands-on experience or strong interest in integrating Large Language Models (specifically Anthropic Claude). Ideally, you understand:
• Prompt design (such as leveraging Claude’s XML tag structure).
• Tool use / function calling to connect LLMs to your C# backend.
• Handling LLM latency and rate limits using caching (Redis) and asynchronous workflows.
• Product Mindset: A passion for building software that delivers an exceptional, intuitive user experience.
• Team First: Strong communication skills, empathy, and a highly collaborative approach to engineering.