Founding Software Engineer, Full Stack

Airweave (YC X25); Amsterdam; On-site; EUR 80,000 - 100,000; Full time

Benefits offered by this job

Health, dental, and vision coverage

Competitive salary with equity

Direct impact on product direction

Work in a skilled technical team

Job summary

A tech startup in Amsterdam is seeking a Founding Software Engineer, Full Stack, to build an innovative product layer connecting AI to user data. You'll work across the system, shipping new features rapidly. Ideal candidates have experience in both frontend and backend development, and enjoy working in fast-paced environments. This role offers a competitive salary and equity options with direct influence on early-stage product development.

Qualifications

• Ability to work across frontend and backend development.
• Comfortable with distributed systems and workflow orchestration.
• Experience in early-stage startups is a plus.

Responsibilities

• Build and improve multi-step LLM search infrastructure.
• Design microservices layer including APIs and async workers.
• Extend the sync engine to connect to various sources.
• Implement frontend features to simplify complex workflows.
• Contribute to team tooling and CI/CD processes.

Skills

End-to-end application development

Understanding of system architecture

Frontend and backend versatility

Familiarity with transformers

Experience with async Python

Adaptability in fast-paced environments

Tools

React

TypeScript

Terraform

Kubernetes

Job description

Join to apply for the Founding Software Engineer, Full Stack role at Airweave (YC X25)

This role offers a competitive salary (€80K–€100K) with meaningful equity (0.25%–0.75%). Your actual pay will be based on your skills and experience – talk with your recruiter to learn more.

Base pay range

We're looking for a full-stack founding engineer to help build Airweave's product layer that connects AI to user data.

At Airweave, you'll work across the entire system: from the search pipelines that power AI agents, to the sync infrastructure that keeps data flowing, to the APIs, MCPs and frontend that developers use every day. You'll ship features that land in production the same day.

This is early-stage work. The codebase is young, the architecture is evolving, and your decisions will shape how thousands of AI agents access information.

What you'll work on

• Build and improve our multi-step, multi-index, distributed LLM search infrastructure
• Design and maintain our microservices layer: APIs, MCP servers, and async workers coordinated through Temporal and Redis
• Extend the sync engine that connects to dozens of sources and keeps data flowing reliably
• Ship frontend features in React/TypeScript that make complex workflows feel simple
• Contribute to CI/CD, observability, and the tooling that keeps the team moving fast

You might be a fit if

• You've built and shipped applications end-to-end
• You like understanding how systems fit together, not just your slice
• You're comfortable moving between frontend and backend work
• You have familiarity with transformers, embeddings and vector search
• You've worked with async Python, TypeScript, or similar
• You're drawn to early-stage environments where things move fast and change often

Bonus Points

• Experience with data pipelines, infrastructure (Terraform, Kubernetes), or ETL systems
• Background in distributed systems or workflow orchestration

What We Offer

• Customers including one of the world's leading AI labs
• Competitive salary (€80K–€100K) with meaningful equity (0.25%–0.75%)
• Health, dental, and vision coverage
• Work in-person in the heart of Amsterdam (Herengracht) with a highly-skilled, technical team
• Direct impact on architecture and product direction from the first week

Seniority level

Entry level

Employment type

Full-time

Job function

Engineering and Information Technology

Industries

Software Development