Senior AI-First Full-Stack Engineer – Barcelona

Krell Consulting & Training, S.L.; Barcelona; Remote; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Early-stage equity participation

Job summary

MaxIT Consulting – Max Corporate Group in Barcelona, Spain, is seeking a Senior AI-First Full-Stack Engineer to own the complete product stack from idea to production for an AI-powered healthcare workforce platform. You will work in a founder-led team, using AI coding assistants daily, shaping architecture across frontend (TypeScript/React) and backend (Java/Kotlin/Python/Go) deployed on AWS or GCP.

This hands-on role offers autonomy, base salary between €60,000 and €90,000 gross annually, and

Qualifications

• 5+ years of professional software engineering experience.
• Ownership of production web applications from frontend through backend and deployment.
• Strong TypeScript experience and frontend framework React.
• Backend languages such as Java, Kotlin, Python, or Go.
• Strong SQL knowledge designing schemas for complex workflows.
• Experience deploying on AWS or GCP.
• Daily, practical use of AI coding assistants.
• Ability to critically evaluate and verify AI-generated code.
• Strong product mindset and autonomy.

Responsibilities

• Design, build, deploy, and operate production web applications end to end.
• Work across frontend, backend, databases, cloud infrastructure, and product workflows.
• Build modern user experiences using TypeScript and React or comparable frontend technologies.
• Develop backend services using Java, Kotlin, Python, Go, or related technologies.
• Design robust SQL schemas for complex, real-time operational workflows.
• Deploy and operate applications in AWS or GCP environments.
• Use AI coding assistants as part of the daily software-development workflow while maintaining strong review and verification practices.
• Collaborate directly with product, design, operations, and customer-facing teams.
• Take ownership of technical outcomes from initial problem definition through production operation.
• Build secure and reliable systems handling sensitive healthcare‑related information.

Skills

TypeScript

React

Java

Kotlin

Python

Go

SQL

AWS

GCP

AI coding assistants

Code verification

Autonomy

Product mindset

Job description

MaxIT Consulting – Max Corporate Group in Barcelona, Spain, is seeking a Senior AI-First Full-Stack Engineer to own the complete product stack from idea to production for an AI-powered healthcare workforce platform. You will work in a founder-led team, using AI coding assistants daily, shaping architecture across frontend (TypeScript/React) and backend (Java/Kotlin/Python/Go) deployed on AWS or GCP.

This hands-on role offers autonomy, base salary between €60,000 and €90,000 gross annually, and