We create connections to make your business transformation accelerate!
Senior Full Stack Developer, AI
Location
Spain
Posted
6 days ago
Salary
0
Seniority
Senior
Job Description
Senior Full Stack Developer, AI
LEADtech
• Building and scaling platforms and products • Working across the A.I technology stack to deliver a seamless user experience • Joining projects with a shipping fast approach and a modern tech stack • Designing, implementing, and maintaining RESTful APIs with NextJS/Express • Modeling Context Protocol (MCP) Knowledge Agents with Claude SDK • Creating AI Agents that can take actions and handle multi-step reasoning • Developing and maintaining features on both React frontend and Node.js (NextJS) backend • Building intuitive user interfaces using TypeScript, Vite, React and a UI component library • Integrating the platform with various external services • Collaborating closely with AI product managers and specialists • Contributing to database schema design and writing migrations • Collaborating on application deployment and maintaining cloud infrastructure
Job Requirements
- Extensive experience with the Python framework
- Deep API Integration experience with 3rd Party vendors
- Ability to work with multiple types of SDK to integrate into products quickly
- Highly proficient in TypeScript and its application in both frontend (React) and backend (Node.js) environments
- Strong experience with React and modern state management, including Hooks and the Context API
- Solid experience building and consuming REST APIs with Node.js and NextJS or Express
- Experience with databases like PostgreSQL, and working with an ORM or query builder
- Knowledge of LangGraph, LangChain, LangFuse
- Collaborative problem-solver, eager to take on new challenges
- Genuine passion and awareness for artificial intelligence
Benefits
- Competitive salary
- Full-time permanent contract
- Top-tier private health insurance (including dental and psychological services)
- 25 days of vacation plus your birthday off, with flexible vacation options—no blackout days!
- Flexible schedule with flextime and the option of working full remote or from our Barcelona office
- Free Friday afternoons with a 7-hour workday
- 35-hour workweek in July and August so you can savor summer!
- Internal training and an annual budget for external learning opportunities
- Ticket restaurant and nursery vouchers, paid directly from your gross salary
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