Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I'm a developer who specializes in AI powered web application from Spain Senior Full-Stack Developer experienced in building AI-powered web applications with React, Node.js and Supabase. I help clients transform ideas into scalable digital products using OpenAI and LangChain. I value clear communication, quality code and long-term partnerships. Open to remote opportunities and exciting collaborations…I'm a developer who specializes in AI powered web application from Spain Senior Full-Stack Developer experienced in building AI-powered web applications with React, Node.js and Supabase. I help clients transform ideas into scalable digital products using OpenAI and LangChain. I value clear communication, quality code and long-term partnerships. Open to remote opportunities and exciting collaborations

Kjell Simon Eilertsen

Full Stack Developer, Web Developer, Back-End Developer, +3





I'm a developer who specializes in AI powered web application from Spain Senior Full-Stack Developer experienced in building AI-powered web applications with React, Node.js and Supabase. I help clients transform ideas into scalable digital products using OpenAI and LangChain. I value clear communication, quality code and long-term partnerships. Open to remote opportunities and exciting collaborations…I'm a developer who specializes in AI powered web application from Spain Senior Full-Stack Developer experienced in building AI-powered web applications with React, Node.js and Supabase. I help clients transform ideas into scalable digital products using OpenAI and LangChain. I value clear communication, quality code and long-term partnerships. Open to remote opportunities and exciting collaborations

Available to hire

Benalmadena, Spain

I’m a developer who specializes in AI powered web application from Spain

Senior Full-Stack Developer experienced in building AI-powered web applications with React, Node.js and Supabase. I help clients transform ideas into scalable digital products using OpenAI and LangChain. I value clear communication, quality code and long-term partnerships.
Open to remote opportunities and exciting collaborations

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Senior Full Stack Engineer at Enverus

August 1, 2023 - Present

Developed modern Web and AI-driven apps using industry best practices and current technology trends; built and automated backend services using Core Java, Node.js, and FastAPI; integrated frontend with React/Next.js; exposed secure RESTful APIs; focused on security, reliability, and high-performance solutions in fast-paced product environments.

Junior Developer at Lanars

September 1, 2021 - July 1, 2023

Developed responsive and user-centric web applications using React, focusing on performance, accessibility, and maintainable component architecture; built and automated backend services using Core Java, Node.js, and FastAPI; integrated modern JavaScript frameworks with Postgres/MySQL/MongoDB and RESTful APIs.

Software Developer at Lanars

September 20, 2021 - September 7, 2018

Developed responsive, user-focused web applications using React, emphasizing performance, accessibility, and maintainable components. Collaborated with designers, product managers, and backend engineers to deliver scalable features aligned with business goals. Enhanced application reliability and efficiency through code optimization, systematic debugging, and adherence to modern frontend best practices.