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# Senior / Staff Backend Engineer AI Search - Remote Worldwide - Up to $185k

- **Company:** matcha
- **Location:** Spain (Remote available)
- **Salary:** €185,000.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Data Structures, Perl (Programming Language), Node.Js, Search Technologies, Retrieval-Augmented Generation, Prompt Engineering, Backend, Virtual Agents, Golang
- **Published:** November 6, 2026
- **Apply:** https://www.jobleads.com/es/job/senior-staff-backend-engineer-ai-search-remote-worldwide-up-to-185k--spain--e44cf5a33b9716252fe07bac8c2c3a762

## About the Role

* 7+ years building backend systems that power a user-facing product
 * Hands-on with AI agent tooling: eval frameworks, RAG pipelines, prompt engineering
 * Fundamental understanding of complex data structures and algorithms
 * Strong in at least one of Perl, Go or Node.js, and happy to work across all three
 * Experience mentoring senior engineers
 * Good product acumen, you understand what users need and can make tradeoffs when necessary
 * Clear written and spoken communication, you work well in a distributed team
 * A track record of owning systems end to end

Compensation and benefits

## Description

Full-time · Fully remote (US, UK, Canada, Europe, Switzerland, Argentina, Brazil, Mexico, Uruguay, South Africa) · Up to $185k per year, the same regardless of where you live

This is a Senior / Staff Backend Engineer role on the AI search team of a fully remote company.

Looking for a senior or staff backend engineer to build AI-assisted answers into a search product used by a large audience. You will own this end to end, from first design to production, in a backend spanning Perl, Go and Node.js.

What you'll do

 * Build AI-assisted answers into search, from retrieval and prompting to evaluation and rollout
 * Own your work end to end: design, implementation, deployment, monitoring and iteration
 * Work across backend services written in Perl, Go and Node.js
 * Set up and run eval frameworks so changes to models and prompts are measured, not guessed
 * Make product and technical tradeoffs and explain them clearly to the team
 * Mentor senior engineers and raise the bar on how the team builds

You

 * 7+ years building backend systems that power a user-facing product
 * Hands-on with AI agent tooling: eval frameworks, RAG pipelines, prompt engineering
 * Fundamental understanding of complex data structures and algorithms
 * Strong in at least one of Perl, Go or Node.js, and happy to work across all three
 * Experience mentoring senior engineers
 * Good product acumen, you understand what users need and can make tradeoffs when necessary
 * Clear written and spoken communication, you work well in a distributed team
 * A track record of owning systems end to end

Compensation and benefits

 * Compensation: Up to $185k per year, the same regardless of where you live
 * Unlimited PTO
 * No core working hours, around 40 hours a week on average
 * Flexible hours, organize your day around your life