€89,000 - €127,000 a year
Gross, as stated in the ad.
About €4,830 - €6,570 a month after tax, or €5,320 - €7,720 under the Beckham regime.
Full-time hours
Per the ad.
Fully remote
Per the ad.
Blue Card threshold
Indicative — the ad doesn’t promise sponsorship.

Requirements

Work in English
English is required, per the ad.
Have 5+ years of experience
Senior-level role.

Requirements

What we're looking for

Exceptional code quality: Clean, maintainable, trustworthy code that requires minimal review
Strong execution: You ship fast and ship well
Senior-level experience: 5+ years with React, TypeScript, Next.js, and modern frontend stack
Accountability: You own your decisions and respond when needed
Autonomy: You can own features end-to-end without hand-holding
Pragmatism: You are willing to engage with detail-oriented and iterative work that is essential to the product's success
Technical excellence: Someone who can teach us, not someone we have to teach

Nice to have

Experience with Tailwind CSS
Understanding of UI fundamentals (but design skills are NOT required)
Experience cleaning up and optimizing existing codebases
Comfort working across the stack when needed

The role

We're looking for a senior frontend engineer who is incredible at execution. This is not about building flashy new features from scratch-it's about optimizing, refining, and incrementally improving what we've already built. You'll work closely with our Product Design pod to turn detailed visual specs into clean, production-ready code.

Main Mission: Remove the bottleneck in our Product Design pod by taking ownership of incremental UX/UI improvements to existing features and code.

What you'll do

Optimize and refine existing frontend code and features
Implement incremental UX/UI improvements from detailed design specs (no design skills required)
Work autonomously with minimal code review needed-your code should be clean enough that our other Front Enders can trust it blindfolded
Collaborate with Product Designers, Design Engineers, and Front End Engineers on execution
Focus on high-impact improvements that elevate our product quality and user experience
Clean up and improve legacy code

Our Tech Stack

React, Next.js, TypeScript, Tailwind CSS, TanstackQuery

What We Value

High bar: We only hire people who wow us technically-someone better than us
Trust: We've learned that even "boring tasks" require exceptional engineers, because poor execution takes more time to review than to do right the first time
Execution over excitement: You're motivated by doing excellent work, not just working on the newest, shiniest features

Why This Role Matters

The Product Design pod has ambitious plans in the roadmap, and we need a frontend engineer who can execute flawlessly to keep pace. You'll be critical to ensuring our product quality and velocity.

This role description captures the team's emphasis on exceptional technical quality, execution, and pragmatism over design skills or working on only the most exciting features.

About StackAI

StackAI is a technology company that provides a platform for building and deploying AI applications. The company focuses on enabling developers and enterprises to create, manage, and scale AI-powered solutions, with an emphasis on practical, production-ready AI infrastructure. While the company's global footprint is still emerging, its platform is designed to serve a broad range of industries looking to leverage large language models and other AI technologies.

In Spain, StackAI is actively hiring for engineering roles, including a Senior Frontend Engineer and a Forward Deployed Engineer, indicating a growing presence in the Spanish tech ecosystem. The company's work culture is likely to be fast-paced and engineering-driven, typical of an AI startup, offering international professionals the opportunity to work on cutting-edge AI technology. For relocating professionals, this presents a chance to join a smaller, agile team where they can have a significant impact on the product and its deployment.

Good to know if you are moving

The company is actively hiring for engineering roles in Spain, indicating a growing local team.
As a startup, there may be opportunities for significant impact and career growth.
The roles are focused on AI application development, a high-demand field.
The company uses Ashby for its careers page, which is a common tool for tech startups.

In their own words

About the company & team

StackAI (by Asana) is a no-code AI workflow platform that empowers companies to build, deploy, and scale AI-powered workflows easily. With thousands of users and rapidly growing enterprise adoption, our mission is to democratize access to LLMs and bring AI into the hands of every business operator, not just developers. An Asana Company, we're building the foundational platform for the AI-driven future of work

All open roles at StackAI