Senior Full-Stack Developer (NXJ-63)

We’re looking for a high-impact Senior Full-Stack Developer who loves building fast, scalable systems that move the needle. You’ll design data-heavy backend services, optimise pipelines, and deliver smooth, intuitive frontend features. Collaborating with teams in Spain and Israel, you’ll shape architecture, modernise components, and drive end-to-end delivery in a fast-paced, high-impact environment.

This is a hybrid position based in Spain (Malaga or Madrid ). We welcome candidates from anywhere in Europe who are open to relocation.

Responsibilities

• Design, develop, and maintain scalable backend services and data-processing pipelines using Python and AWS Serverless (Lambda, API Gateway, RDS, S3)
• Build and optimise ETL workflows and data models to support real-time analytics, automation, and AI-driven decision-making
• Collaborate closely with the engineering teams in Spain and Israel , ensuring smooth communication, alignment on architecture, and high-quality delivery
• Contribute to system design and technical decision-making , including microservices architecture, data structures, and refactoring or modernising legacy components
• Implement robust integrations and automations using AWS services, SQLAlchemy, Pandas, and serverless deployment frameworks (Chalice/Serverless)
• Maintain high coding standards through code reviews, testing, and continuous improvement of backend performance, reliability, and observability.

Requirements

• 10+ years of software development experience – 70–80% focused on backend (Python, AWS), with the remainder on React
• Strong expertise in AWS cloud services (Lambda, RDS, API Gateway, Glue, S3, CloudWatch, etc.)
• Proficient in Python (5+ years), JavaScript, and React (2+ years)
• Solid SQL knowledge
• Experience with real production systems (SaaS or data-heavy platforms)
• Familiarity with Git, Jira, and Slack for communication and version control
• Strong system design skills: microservices, ETL pipelines, and data structure design
• Experienced in code architecture, including refactoring and code migrations
• Familiar with AI developer tools (Cursor, GPT)
• Bonus: Experience with scraping tools

What we offer

• Competitive salary and benefits package
• Medical insurance
• Top equipment kit
• Collaborative and innovative work environment
• Career growth and development opportunities
• A chance to work with a talented and driven team of professional

About the project

Our client is a European technology powerhouse shaping the future of digital commerce. Their mission is to make online business management smarter, faster, and fully automated. By combining deep data expertise with intelligent software, they build autonomous agents that continuously optimise key business processes — from pricing and advertising to inventory and operations — all in real time. Behind the scenes, their team of engineers, data scientists, and product experts is redefining how technology and data work together at scale. It’s a place where innovation meets real-world impact, where cutting-edge AI systems learn, adapt, and drive growth for hundreds of online stores worldwide.

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