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

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.

See more

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
See more

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.

Education

Add your educational history here.

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Real Estate & Construction

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
See more