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Joan Sebastian Diaz del Castillo Posso

Joan Sebastian Diaz del Castillo Posso

Tech Lead

Omnitrek | Colombia

Technologies

My Portfolio Highlights

My New Project

Predictive Modeling for Agriculture

My New Course

Supervised Learning with scikit-learn

My New Project

Predictive Modeling for Agriculture

Full-Stack Engineer and Technical Lead with Global Experience

DataCamp Course Completion

Take a look at all the courses I’ve completed on DataCamp.

Courses

Supervised Learning with scikit-learn
Data Manipulation with pandas
Introduction to Statistics
Unsupervised Learning in Python

My Work Experience

Where I've interned and worked during my career.

Tagnetize | Sep 2022 - Sep 2023

Co-Founder & Chief Technology Officer (CTO)

Spearheaded the technical vision and execution for a social media marketing platform, driving rapid growth and innovation: - Full-Stack Development: Single-handedly developed mobile (React Native) and web applications (Next.js, React.js), along with a help desk platform, ensuring seamless user experiences across all touchpoints. - Scalable Architecture: Implemented a sophisticated data management system combining GraphQL API, Neo4j graph database, Redis caching, and Meilisearch for high-performance search capabilities: • Utilized Neo4j for complex relationship modeling and intelligent content recommendations, improving user engagement. • Leveraged Redis for fast data caching, reducing database load, and improving overall system responsiveness. • Integrated Meilisearch for lightning-fast, typo-tolerant search functionality, enhancing user experience and content discovery. - Cloud Infrastructure: Leveraged Kubernetes for back-end deployment on AWS, enabling the platform to handle increases in peak demand without performance degradation. - DevOps Excellence: Implemented CI/CD pipelines using Argo CD and Netlify, reducing deployment times by 70% and enabling rapid iterations. - Cost Optimization: Utilized ARM servers to optimize performance while reducing operational costs by 40%. - International Operations: Led the integration of key alliances and APIs, automating order management for suppliers in the USA and streamlining product delivery across most of Latin America. Key Achievements: - Integrated complex APIs and automated systems, resulting in a 50% reduction in order processing time for international operations. - Expanded product delivery capabilities to cover most of Latin America, increasing the platform's market reach.
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FunThriving | Jul 2020 - Jul 2022

VP of Technology and Customer Experience

Led the launch and scaling of a new virtual office service, driving exponential growth and enhancing customer experience: - Platform Development: Solely responsible for full-stack development (React.js, Laravel) and UI/UX design of the virtual office platform. - Customer-Centric Features: Implemented key functionalities including subscription management, payment processing, and virtual phone setup using TypeScript and Node.js, increasing user retention. - Administrative Efficiency: Streamlined customer verification and document management processes, reducing administrative overhead. - Customer Service Enhancement: Led the implementation of Freshdesk, improving response efficiency by 50% and increasing customer satisfaction scores. - Database Optimization: Utilized Redis for caching, reducing database load by 50% and improving overall system responsiveness. - Multi-Company Management: Designed and implemented a system enabling enterprise clients to manage multiple virtual offices. Key Achievement: Spearheaded technical initiatives that resulted in an extraordinary 2,500% revenue escalation within the first year of launch, showcasing the ability to deliver high-impact, scalable solutions that drive significant business growth.

Omnitrek | Jun 2014 - Present

Tech Lead

Led end-to-end development of scalable software solutions, driving innovation and efficiency across multiple domains: - Full-Stack Development: Architected and implemented high-performance applications using React, Next.js, Node.js, and GraphQL, resulting in an improvement in application response times. - Cloud Infrastructure & DevOps: Optimized cloud operations using AWS (EC2, S3, ELB, CloudFront), Docker, and Argo CD, reducing deployment times by 60%. - UI/UX Design: Spearheaded the implementation of component-driven development using Figma, increasing design consistency across projects. - Data-Driven Decision Making: Integrated analytics tools (Google Analytics, Mixpanel) to improve e-commerce performance, resulting in an increase in conversion rates. - Team Leadership: Mentored and led a team of developers, implementing agile methodologies (Scrum, Kanban) that increased sprint velocity. - Innovative Technologies: Pioneered the adoption of Bun.js, reducing build times by 50% and improving overall development efficiency. Key Achievement: Designed and led a comprehensive Coding Bootcamp, upskilling team members in modern web development practices including React.js, TypeScript, and Next.js.

About Me

Joan Sebastian Diaz del Castillo Posso

Tech enthusiast, knowledge hungry, full-stack developer and UI/UX designer. Making the most of time because our potential is unlimited, but time is not.

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