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Hi there! I'm Krstoffr Nichole Villejo, a Senior Full Stack Engineer with 9+ years of experience building scalable, high-performance web and mobile applications. I specialize in Python (Flask, Django, FastAPI), PHP (Laravel, Symfony), and JavaScript/TypeScript (React, React Native, Node.js). I design cloud-native architectures with AWS and Google Cloud, containerize with Docker and Kubernetes, and deliver reliable RESTful/GraphQL APIs, real-time dashboards, and microservices that power global operations. Outside of coding, I enjoy collaborating with cross-functional teams in Agile environments to ship features with performance, security, and maintainability at the forefront. I'm passionate about user experience and continuously learning new technologies to drive impact.…Hi there! I'm Krstoffr Nichole Villejo, a Senior Full Stack Engineer with 9+ years of experience building scalable, high-performance web and mobile applications. I specialize in Python (Flask, Django, FastAPI), PHP (Laravel, Symfony), and JavaScript/TypeScript (React, React Native, Node.js). I design cloud-native architectures with AWS and Google Cloud, containerize with Docker and Kubernetes, and deliver reliable RESTful/GraphQL APIs, real-time dashboards, and microservices that power global operations. Outside of coding, I enjoy collaborating with cross-functional teams in Agile environments to ship features with performance, security, and maintainability at the forefront. I'm passionate about user experience and continuously learning new technologies to drive impact.

Krstoffr Nichole Villejo

Full Stack Developer, Web Developer, Back-End Developer, +2

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Hi there! I'm Krstoffr Nichole Villejo, a Senior Full Stack Engineer with 9+ years of experience building scalable, high-performance web and mobile applications. I specialize in Python (Flask, Django, FastAPI), PHP (Laravel, Symfony), and JavaScript/TypeScript (React, React Native, Node.js). I design cloud-native architectures with AWS and Google Cloud, containerize with Docker and Kubernetes, and deliver reliable RESTful/GraphQL APIs, real-time dashboards, and microservices that power global operations. Outside of coding, I enjoy collaborating with cross-functional teams in Agile environments to ship features with performance, security, and maintainability at the forefront. I'm passionate about user experience and continuously learning new technologies to drive impact.…Hi there! I'm Krstoffr Nichole Villejo, a Senior Full Stack Engineer with 9+ years of experience building scalable, high-performance web and mobile applications. I specialize in Python (Flask, Django, FastAPI), PHP (Laravel, Symfony), and JavaScript/TypeScript (React, React Native, Node.js). I design cloud-native architectures with AWS and Google Cloud, containerize with Docker and Kubernetes, and deliver reliable RESTful/GraphQL APIs, real-time dashboards, and microservices that power global operations. Outside of coding, I enjoy collaborating with cross-functional teams in Agile environments to ship features with performance, security, and maintainability at the forefront. I'm passionate about user experience and continuously learning new technologies to drive impact.

Available to hire

Hi there! I’m Krstoffr Nichole Villejo, a Senior Full Stack Engineer with 9+ years of experience building scalable, high-performance web and mobile applications. I specialize in Python (Flask, Django, FastAPI), PHP (Laravel, Symfony), and JavaScript/TypeScript (React, React Native, Node.js). I design cloud-native architectures with AWS and Google Cloud, containerize with Docker and Kubernetes, and deliver reliable RESTful/GraphQL APIs, real-time dashboards, and microservices that power global operations.

Outside of coding, I enjoy collaborating with cross-functional teams in Agile environments to ship features with performance, security, and maintainability at the forefront. I’m passionate about user experience and continuously learning new technologies to drive impact.

Skills

Experience Level

Expert

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Language

English

Fluent

Work Experience

Senior Full Stack Engineer at Apps Tango

August 1, 2020 - March 1, 2026

Led the development of a SaaS compliance platform using Python (Flask/Django), PHP (Symfony), React/Next.js, serving 15,000+ daily users and automating regulatory reporting for global financial operations. Designed and implemented microservices architecture with REST/GraphQL APIs and event-driven communication using Kafka, boosting system throughput by 30% and achieving 99.9% uptime. Integrated payment systems with Stripe and PayPal, processing 10,000+ monthly transactions while ensuring PCI-DSS compliance and reducing errors by 15%. Built reusable, maintainable React components, managed global state with Redux Toolkit, and optimized rendering performance using React Hooks. Engineered real-time dashboards for global operations, combining FastAPI backend services with React frontends for high-performance analytics. Designed optimized database schemas for PostgreSQL and MongoDB, implemented caching strategies with Redis, improving data access speeds and reliability. Configured Linux envi

Full Stack Engineer at Napse Global

December 1, 2018 - July 1, 2020

Developed a global travel booking platform using Python (Django), PHP (Laravel), Vue.js/TypeScript, supporting 8,000+ daily bookings and increasing user retention by 28%. Built REST/GraphQL APIs and integrated RabbitMQ for real-time notifications, handling 100,000+ API requests monthly with 99.8% uptime. Engineered ETL pipelines in Python and MySQL for analyzing travel data, enabling dynamic pricing and real-time availability updates. Designed modular Vue.js interfaces, optimizing performance via virtual DOM, lazy loading, and efficient state management with Vuex/Pinia. Developed reusable UI components with Vuetify and Tailwind CSS, ensuring consistent branding across web applications. Applied containerization with Docker, orchestrated deployments, and administered cloud environments for stability, scalability, and security. Enforced robust security practices including OAuth 2.0, JWT, API rate limiting, and monitoring using New Relic and ELK Stack.

Junior Software Developer at TechTIQ Solutions

August 1, 2016 - November 1, 2018

Contributed to a healthcare scheduling platform using Node.js, Python (Flask), React, improving booking efficiency by 20% for 5,000+ monthly users. Developed secure RESTful APIs with JWT authentication and rate limiting, ensuring compliance with healthcare regulations (HIPAA). Assisted in migrating legacy systems to GCP, leveraging cloud services for scalability, availability, and cost optimization. Built reusable components and services in React and Angular, implementing SPAs and modular architectures for maintainability. Developed automated test cases using PHPUnit and Selenium, contributing to improved application reliability. Participated in Agile development cycles, from requirements gathering to deployment and post-release support.