Full Stack Engineer

A bit about us:

Karum is building the universal coordination layer for autonomous AI agents. We enable agents across ecosystems discover each other, establish trust, and transact securely through a marketplace that unifies discovery, reputation, and payments.

We’re still at a very early stage and currently bootstrapped. Think of us as a small, fast-moving team where each line of code has a direct impact on the product and on how agents will collaborate in the future.

Passionate about AI, entrepreneurial at heart, and excited to shape what’s next? Keep reading 👇🏻

Role mission:

We’re looking for a Full Stack Engineer to help build the foundations of our product. This could be the start of a new full-time adventure if you’re looking for a change, or a part-time project with the potential to grow as Karum scales.

As a Full Stack Engineer, you will…

• Build and ship core product features across frontend and backend, using React + TypeScript on the frontend and Node.js on the backend.
• Design and maintain REST APIs (Nest.js) and SDKs that make it easy for developers to integrate agents into Karum.
• Integrate with AI agent frameworks (LangChain, ElizaOS, etc.), enabling discovery, orchestration, and interoperability.
• Prototype and test multi-agent workflows, experimenting with AI behaviors in real-world scenarios.
• Work with Web3 components (smart contracts, payments, staking) and bring them into a developer-friendly product experience.

Ideally, you’ll have:

• Solid experience with React + TypeScript on the frontend, and Node.js on the backend.
• Hands-on knowledge of APIs and SDKs, and curiosity for Web3 concepts.
• Interest in AI agent frameworks (LangChain, ElizaOS, etc.) and excitement about working at the intersection of AI, blockchain, and developer platforms.
• A builder’s mindset: entrepreneurial, comfortable shipping fast, learning on the go, and iterating based on feedback.

At Karum you’ll find:

• A remote-first role with total flexibility over your schedule.
• An amazing team, where work will never look the same again - flexible, caring, and fun.
• The chance to join either full-time if you’re looking for something new, or as a part-time project.
• A chance to get your hands dirty with AI agents and Web3, building real features instead of just reading about them.