Full-stack Web Engineer with 3+ years of experience building and scaling production web platforms. I lead the development of SISU Fitness Club, a React + Node.js + MongoDB platform for coaches and athletes, delivering service for over 30 athletes, improvement in web performance, and a unified platform foundation. Strong focus on secure architectures (CORS/CSP/HSTS), reliability (health checks, background schedulers), and developer productivity.

Juan Beltran

Full-stack Web Engineer with 3+ years of experience building and scaling production web platforms. I lead the development of SISU Fitness Club, a React + Node.js + MongoDB platform for coaches and athletes, delivering service for over 30 athletes, improvement in web performance, and a unified platform foundation. Strong focus on secure architectures (CORS/CSP/HSTS), reliability (health checks, background schedulers), and developer productivity.

Available to hire

Full-stack Web Engineer with 3+ years of experience building and scaling production web platforms. I lead the
development of SISU Fitness Club, a React + Node.js + MongoDB platform for coaches and athletes, delivering service
for over 30 athletes, improvement in web performance, and a unified platform foundation. Strong focus on secure
architectures (CORS/CSP/HSTS), reliability (health checks, background schedulers), and developer productivity.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Intermediate

Language

Spanish; Castilian
Fluent
English
Fluent
Swedish
Beginner

Work Experience

Lead Software Engineer (Full-Stack) at SISU Fitness Club (Platform)
September 1, 2025 - October 13, 2025
Delivered a coaching/athlete platform enabling personalized routines, progress tracking, scheduling, and membership management. Improved product delivery speed by 40% using Cursor agents and GitHub; boosted web performance by 25% through unified architecture, modular boundaries, code splitting, and asset optimization. Implemented a secure API gateway with environment-aware policies (CORS allow list, CSP/HSTS), request sanitization, and rate limiting. Automated membership tracking, billing cycles, and notifications with resilient background jobs. Designed scalable domain models for fitness workflows and integrated external services (Cloudinary, OpenAI, Google and Spotify OAuth). Deployed API and SPA as separate services on Render with fallback routing and domain redirects.
Customer Service Representative at IntouchCX
August 1, 2025 - October 13, 2025
Resolved travel-related issues for global clients on calls, emails, and messaging, ensuring 100% of clients received a solution and over 70% reported satisfaction. Provided shadowing opportunities and Q&A sessions for over 50 colleagues to improve performance. Recognized as a top-performing agent and participated in company-wide town halls for excellence.
Content Creator at Noticias IA Colombia
April 1, 2025 - October 13, 2025
Regulated content for Noticias IA Colombia, the country’s first AI-focused newspaper. Used IA agents, ChatGPT, Perplexity, Flux, WordPress, Ideogram and Canvas to produce/editorial content.
Lead Software Engineer (Full-Stack) at SISU Fitness Club (Platform)
September 1, 2025 - October 13, 2025
Led the development of SISU Fitness Club, a coaching/athlete platform enabling personalized routines, progress tracking, scheduling, and membership management. Improved product delivery speed by 40% using Cursor agents and GitHub; boosted web performance by 25% through unified architecture, modular boundaries, code splitting, and asset optimization. Implemented a secure API gateway with environment-aware policies, CORS allow lists, CSP/HSTS, request sanitization, and rate limiting. Automated membership tracking, billing cycles, and notifications with resilient background jobs. Designed scalable domain models for fitness workflows and integrated external services (Cloudinary, OpenAI, Google and Spotify OAuth). Deployed API and SPA as separate services on Render with fallback routing and domain redirects.
Customer Service Representative at IntouchCX
August 1, 2025 - October 13, 2025
Resolved travel-related issues for global clients on calls, emails, and messaging, ensuring 100% issue resolution with over 70% customer satisfaction. Provided shadowing opportunities and Q&A sessions for over 50 colleagues to improve performance. Recognized as a top-performing agent and participated in company town hall.
Content Creator at Noticias IA Colombia
April 1, 2025 - October 13, 2025
Regulated content for Noticias IA Colombia, the country’s first newspaper focused entirely on artificial intelligence (AI); collaborated with IA agents, ChatGPT, Perplexity, Flux, WordPress, Ideogram and Canvas to manage AI-driven content workflows.

Education

Professional in analysis and development of information systems at SENA
December 1, 2018 - September 1, 2021
Professional in analysis and development of information systems at SENA
December 1, 2018 - September 1, 2021

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Professional Services, Media & Entertainment, Education