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Hello! I’m a full-stack web developer with 6 years of experience leading cross-functional teams to deliver scalable, high-performance web applications. I focus on end-to-end development, optimizing both frontend UX and backend architecture, and accelerating time-to-market with CI/CD and rigorous code quality practices. I enjoy delivering measurable improvements in performance, reliability, and customer engagement.…Hello! I’m a full-stack web developer with 6 years of experience leading cross-functional teams to deliver scalable, high-performance web applications. I focus on end-to-end development, optimizing both frontend UX and backend architecture, and accelerating time-to-market with CI/CD and rigorous code quality practices. I enjoy delivering measurable improvements in performance, reliability, and customer engagement.

Marc Colldeforns Armero

Full Stack Developer, Web Developer, Back-End Developer, +1

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Hello! I’m a full-stack web developer with 6 years of experience leading cross-functional teams to deliver scalable, high-performance web applications. I focus on end-to-end development, optimizing both frontend UX and backend architecture, and accelerating time-to-market with CI/CD and rigorous code quality practices. I enjoy delivering measurable improvements in performance, reliability, and customer engagement.…Hello! I’m a full-stack web developer with 6 years of experience leading cross-functional teams to deliver scalable, high-performance web applications. I focus on end-to-end development, optimizing both frontend UX and backend architecture, and accelerating time-to-market with CI/CD and rigorous code quality practices. I enjoy delivering measurable improvements in performance, reliability, and customer engagement.

Available to hire

Hello! I’m a full-stack web developer with 6 years of experience leading cross-functional teams to deliver scalable, high-performance web applications.

I focus on end-to-end development, optimizing both frontend UX and backend architecture, and accelerating time-to-market with CI/CD and rigorous code quality practices. I enjoy delivering measurable improvements in performance, reliability, and customer engagement.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Work Experience

Full-Stack Developer & Technical Lead at TalkTime AI

March 1, 2025 - November 1, 2025

Sole developer and technology lead for TalkTime AI; built the entire product stack end-to-end, from backend services to real-time front-end interfaces; developed real-time conversation analysis systems to provide actionable coaching feedback; integrated Large Language Models (LLMs) and Speech-to-Text for AI-driven language interactions.

Senior Full-Stack Developer at Inmobiliaria Ibercasa

May 1, 2024 - September 1, 2024

Designed, developed, and maintained frontend and backend applications supporting Ibercasa’s core business operations; contributed to the migration and refactoring of legacy systems into modern, maintainable, and scalable architectures; built internal platforms that improve customer experience and operational efficiency across multiple business areas.

Full-Stack Developer at Achieve.nl

April 1, 2020 - January 1, 2024

Built and maintained full-stack features, improving system stability and reducing bug reports; collaborated on designing scalable and robust systems aligned with Achieve.nl’s product vision; wrote clean, maintainable, and efficient code while following software engineering best practices.