Freelancer profile translated to English.
Back to original languageAbout Johan
Hello, I'm Johan Cárdenas.
Full Stack Developer specializing in the design, development, and deployment of scalable web applications using Angular, Node.js, Express, MongoDB, Docker, and AWS.
I work with a focus on clean architectures, design patterns, advanced componentization, modular APIs, security, and production deployments. I am characterized by transforming complex requirements into stable, optimized, and easy-to-maintain solutions.
I have experience building end-to-end systems such as:
Administrative platforms and high-performance dashboards
POS systems with inventory, sales, cash register, and reporting modules
Financial simulators with advanced business logic
SPA applications with efficient UI/UX flows
Process automations, cron jobs, and optimized file/image handling
My background as an entrepreneur in retail and digital commerce allows me to understand the business beyond the code. I don't just develop features: I design systems that improve operations, increase profitability, and deliver real value.
I have experience in production environments with:
Docker (containers, images, build optimization)
AWS (EC2, S3, CloudFront, etc.)
PM2, Nginx, Linux (Ubuntu)
Gateway integration, JWT authentication, roles, permissions, structured logs
Additionally, I am passionate about the Web3 ecosystem, NFTs, tokenization, and decentralized digital models.
I am defined by autonomy, technical clarity, results-orientation, and the ability to take a project from scratch to production with professional standards.
I enjoy working with clarity, responsibility, and constant communication. My goal is to deliver well-made, stable projects that provide real value to their users.
Spanish
Native or bilingual
English
Basic
Can work on-site
Colombia (up to 50km)
Experience
- RomboFull Stack DeveloperOctober 2025 - November 2025 (1 month)Colombia, Colombia• ● Financial Logic: Created the API responsible for automatic calculations (installments, rates, amortization tables) and business rule validation for credit approval.• ● Data Visualization: Implemented a dynamic interface to present simulation results in real-time to the end-user.
- WorkcangoFrontend DeveloperOctober 2025 - November 2025 (1 month)Colombia, Colombia• ● UI Implementation: Translated high-fidelity designs from Figma into clean code (HTML/CSS/JS), ensuring a pixel-perfect experience.• ● Optimization: Structured reusable components and ensured full adaptability to mobile devices (Responsive Design).
- NexPOSFull Stack & UI/UX EngineerMay 2025 - November 2025 (6 months)Colombia, ColombiaLed the integral development of a modular POS system for sales and inventory management. Architecture & Backend: Designed a scalable architecture with Node.js and Express, managing complex modules for products, warehouses, and reports. Frontend & UI: Built a modern and responsive interface with Angular, translating business requirements into intuitive user flows. Code Quality: Implemented rigorous version control using Git and GitHub, ensuring continuous integration and modular phased work. Impact: Developed an administrative dashboard and a referral system to boost business growth.
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Education
- Full Stack Developer BootcampBogotá Institute of Technology (BIT)2025Bootcamp Full Stack Developer
- Fundamentals of Blockchain and Crypto Assets2022Fundamentos de Blockchain y Cripto Activos