Senior AI-First Full-Stack Engineer for Engagement Apps

HappyScribe; Barcelona; Hybrid; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Competitive salary

Equity

Generous token spend policy

30 days holiday

Health coverage

Tax-smart savings

Job summary

HappyScribe in Barcelona is hiring a senior full-stack engineer to own engagement features end to end across Rails backend and React/React Native/Electron apps. You’ll partner with a designer and report to the CPTO, shaping a product area from day one.

You’ll work in a small, pragmatic team with strong emphasis on AI-first development, prototype-driven delivery, and evidence-based quality. Hybrid work with a Barcelona office awaits.

Qualifications

• 5+ years of experience in software development and shipping production apps.
• Strong full-stack capabilities across backend and frontend.
• Experience with design systems or component libraries.
• Proven ability to prototype, ship, and validate features with data.

Responsibilities

• Own Engagement features end to end across Rails backend and React/React Native/Electron apps.
• Collaborate with designer to decide scope, prototype, ship, and validate with evidence.
• Grow the design system and component library with the design team.
• Make architecture calls and improve the pod's output with data-driven decisions.

Skills

Full-stack in production

AI-first

Product judgment

Ambiguity tolerance

Evidence-based quality

Fluent English

Cross-functional collaboration

Tools

Ruby on Rails

React

React Native

Electron

Job description

HappyScribe in Barcelona is hiring a senior full-stack engineer to own engagement features end to end across Rails backend and React/React Native/Electron apps. You’ll partner with a designer and report to the CPTO, shaping a product area from day one.

You’ll work in a small, pragmatic team with strong emphasis on AI-first development, prototype-driven delivery, and evidence-based quality. Hybrid work with a Barcelona office awaits.