Senior Full Stack Developer at Keenfolks designing and optimizing web applications for AI-driven marketing. Collaborating with teams to deliver clean and impactful technical solutions.
Responsibilities
Build and optimize robust, scalable web applications across front-end and back-end stacks
Design and refine data pipelines to collect, process, and analyze large-scale datasets
Implement analytical tools to extract actionable insights that drive business decisions
Mentor and guide development teams, fostering collaboration and excellence
Translate business needs into technical solutions through clear, proactive communication
Manage and supervise external subcontractors, ensuring quality and deadlines are met
Maintain high standards in code quality, documentation, and established procedures
Work in Agile frameworks (Scrum, Kanban) to deliver results efficiently and iteratively
Partner with business, data, and creative teams to align on technical objectives
Drive best practices through code reviews and process optimization
Keep processes and developments well-documented and transparent
Requirements
5+ years as a Full Stack Developer in projects related to Data Engineering and Analytics
Bachelor’s in Systems Engineering, Computer Science, or related fields
Professional English proficiency (official company language). Spanish is a plus
Proficiency in Python, JavaScript, Java, or similar languages
Experience with React, Angular, or Vue.js (front-end) and Node.js, Django, or Flask (back-end)
Knowledge of SQL and NoSQL databases (MySQL, PostgreSQL, MongoDB)
Familiarity with cloud platforms like AWS, Azure, or Google Cloud
Proven ability to lead and mentor teams while managing complex projects
Analytical mindset, proactive problem-solving, adaptability, and strong collaboration
Hands-on experience in Agile environments (Scrum or Kanban)
Benefits
Hybrid Work: 2 days in our beautiful Barcelona office, 3 from home
Free Lunch on office days
Coffee, tea & fresh fruit always available
Office fun: ping pong, yoga, and social activities
Free Friday afternoons
Afterworks & team buildings every month
Work from anywhere for 30 days/year
Birthday day off to celebrate your day
23 vacation days + 2 personal days
Learning & Development Program focused on AI innovation
Career growth and continuous upskilling opportunities
A dynamic, entrepreneurial culture that values creativity, trust, and constructive freedom
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