Ricardo Andres Marquina Molina
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Ricardo Andres Marquina Molina

Ricardo Andres Marquina Molina

About

Detail

Senior Fullstack Engineer | Node.js Expert | Python | Angular | CI/CD Advocate | Database Management Specialist | Open to Global Opportunities
Posadas, Misiones Province, Argentina
Contact Ricardo regarding: 
work
Full-time jobs
Starting at USD4K/month
Flexible work
Starting at USD30/hour

Timeline

work
Job
school
Education

Résumé

Jobs verified_user 0% verified
  • S
    Senior Full Stack Engineer(Remote)
    SKIFF(ACQUIRED BY NOTION)
    Oct 2020 - May 2024 (3 years 8 months)
    • Developed and maintained complex backend services using Node.js, NestJS, and TypeScript, optimizing system performance and reliability. • Built highly interactive and responsive user interfaces with React.js and Next.js, all written in TypeScript, enhancing user engagement and reducing load times. • Designed and implemented RESTful APIs using TypeScript, ensuring secure and efficient communication between frontend and backend. • Integrated microservices architecture with Docker and Kubernetes, improving the platform's scalability and resilience. • Automated deployment pipelines with Jenkins and GitLab CI, reducing deployment times by 50%.
  • S
    Full Stack Developer & AI Engineer(Remote)
    SKIFF(ACQUIRED BY NOTION)
    Oct 2020 - May 2024 (3 years 8 months)
    • Led AI testing efforts over 5 years, developing test scripts, automating model evaluations, and improving the integration process for seamless AI deployment. • Developed and maintained scalable backend services using Python and Flask, focusing on API-driven AI integrations for clients in various industries. • Collaborated with external partners to streamline AI and API testing processes, leveraging my 5 years of AI integration experience. • Applied 7 years of full stack development expertise to build intuitive user interfaces with React.js and Angular, seamlessly integrated with backend AI systems.
  • P
    Full Stack Engineer
    PRIVATE EMAIL
    Apr 2018 - Sep 2020 (2 years 6 months)
    • Developed backend services using Java and created dynamic user interfaces using React.js, improving user experience and system performance. • Integrated Python for automating backend processes and enhancing data processing capabilities. • Managed builds using Gradle and implemented CI/CD pipelines using Jenkins, improving deployment efficiency. • Worked on database management and query optimization using SQL and PostgreSQL, ensuring high availability of data. Java ◦ React.js ◦ Python ◦ Gradle ◦ Jenkins ◦ SQL ◦ PostgreSQL ◦ Git ◦ CI/CD
  • P
    Senior Backend Developer
    PRIVATEMAIL
    Apr 2018 - Sep 2020 (2 years 6 months)
    • Led backend development using Node.js, NestJS, and TypeScript, managing over 500,000 daily API requests and ensuring system stability. • Collaborated with frontend teams using Vue.js and TypeScript to create seamless user experiences and real-time dashboards. • Implemented secure RESTful APIs and handled API authentication with JWT and OAuth2, all written in TypeScript, improving security and user access control. • Migrated core services to a microservices architecture, reducing downtime and improving service scalability.
  • P
    Full Stack Developer & AI Engineer
    PRIVATE EMAIL
    Apr 2018 - Sep 2020 (2 years 6 months)
    • Developed and optimized AI and API workflows, automating AI model testing and enhancing client data processing through custom AI solutions. • Led full stack development for AI-driven applications, building scalable front-end interfaces integrated with Flask and Python-based backends. • Created automated data pipelines and developed APIs for secure, real-time data transfer using Postman and Flask, supporting large-scale client deployments.
  • Sift
    Full Stack Developer
    Sift
    Nov 2016 - Mar 2018 (1 year 5 months)
    • Built backend services using Java and Python, improving backend performance and scalability through effective use of algorithms and data structures. • Developed frontend applications using React.js and built unit tests with Jest to ensure quality and performance. • Managed project versions with Git and automated builds using Gradle, streamlining development processes. • Conducted end-to-end testing for new features, ensuring functionality met both technical and business standards.
  • Sift
    Senior Node.js Developer
    Sift
    Nov 2016 - Mar 2018 (1 year 5 months)
    • Built robust backend services using Node.js and NestJS, written entirely in TypeScript, improving application performance and API response times. • Developed dynamic, responsive frontend components using React.js and Vue.js, ensuring an optimal user experience across devices. • Designed and integrated GraphQL and RESTful APIs in TypeScript, improving data fetching efficiency and reducing network overhead. • Enhanced continuous integration and deployment (CI/CD) processes using Docker, TypeScript, and GitLab CI, reducing the frequency of manual deployments.
  • Sift
    AI & Full Stack Developer
    Sift
    Nov 2016 - Mar 2018 (1 year 5 months)
    • Developed and tested AI models for enterprise applications, utilizing advanced AI techniques to improve data accuracy and processing efficiency. • Built backend services for AI-driven applications, leveraging 10 years of backend development experience to ensure scalability and reliability. • Integrated AI models into existing systems, working closely with clients to align technical solutions with business needs while ensuring data integrity.
  • Poshmark
    Junior Software Developer
    Poshmark
    Jul 2014 - Oct 2016 (2 years 4 months)
    • Developed backend components using Node.js and TypeScript, optimizing data flow and reducing server load during high-traffic periods. • Created reusable, scalable Vue.js components in TypeScript for various e-commerce functionalities, improving maintainability and reducing development time. • Built and maintained RESTful APIs for e-commerce functionalities like payments, inventory, and user management. • Worked with MongoDB and PostgreSQL for data storage and retrieval, ensuring high availability and fault tolerance.
  • Poshmark
    Junior Full Stack Developer
    Poshmark
    Jul 2014 - Oct 2016 (2 years 4 months)
    • Built dynamic, reusable front-end components and integrated them with robust backend systems using Python and JavaScript, optimizing performance and scalability. • Conducted AI model testing and API development, enhancing system functionality and improving the accuracy of the AI-driven components. • Gained valuable experience in full stack development, leading the backend development efforts to ensure smooth AI integrations with customer-facing applications.
  • F
    Full Stack Engineer
  • P
    Senior Backend Developer(Contract
    PRIVATEMAIL
    • Developed backend services using Python, managing over 500,000 daily API requests to ensure reliable, high-performance operations. • Designed and implemented microservices with Flask and Django, supporting 3 client applications and improving the feature delivery pipeline. • Reengineered critical PHP components, reducing integration errors and improving system stability. • Deployed serverless functions with AWS Lambda, S3, SQS, and SNS, reducing infrastructure costs by 35%. • Provided consultation on Python data processing and automation, leveraging Pandas and NumPy to enhance data workflows. • Maintained and optimized backend services using Node.js (Express.js), incorporating performance enhancements and best practices. • Mentored
  • Sift
    Senior Node.js Developer(Contract
    Sift
    • Designed and deployed 10+ RESTful APIs within a microservices architecture using Node.js and Express.js, supporting over 1 million daily transactions and improving integration speed. • Automated client management systems with Node.js and Express.js, reducing manual tasks by 80% and improving operational efficiency. • Refined React components, enhancing frontend performance and user experience. • Actively engaged in Agile SDLC using SCRUM methodologies, contributing to sprint planning, daily stand-ups, and retrospectives. • Utilized PM2 for performance monitoring, minimizing downtime in microservices. • Managed and optimized 5+ MySQL databases, reducing backup time and improving database performance. • Created UML diagrams, streamli
  • Poshmark
    Software Developer(Contract
    Poshmark
    • Developed an E-Cash Management tool handling $50 million in annual transactions, enhancing data security using Node.js, PHP, SQL, Vue.js, and Angular. • Applied MVC, Singleton, and DTO design patterns to build maintainable and scalable backend and frontend solutions, leading to efficient system development. • Optimized database performance using MySQL and MsSQL, cutting query time and boosting database efficiency. • Enhanced frontend with React.js, Vue.js, and Angular components, improving user engagement and overall interaction with the platform. • Conducted thorough integration, unit, system, and stress testing, ensuring system reliability and reducing post-release bugs. • Developed backend components with Node.js, Express.js, and
  • S
    Full Stack Engineer(Contract
    SKIFF(ACQUIRED BY NOTION)
    • Engineered backend systems with Node.js and Express.js, improving system performance and reducing server response time by 150ms, which significantly enhanced platform speed. • Spearheaded the development of RESTful APIs using Express.js and integrated Swagger for documentation, accelerating the integration of Skiff's encrypted products and streamlining cross-service communication. • Optimized database management with Mongoose and MongoDB, handling over 100 million database queries per month and reducing query response time, improving overall user experience. • Led the migration to a microservices architecture using Docker and Kubernetes, scaling services to accommodate increased traffic and reducing infrastructure costs by $150,000 an
Education verified_user 0% verified
  • N
    Bachelor of Engineering (BEng)
    NANYANGTECHNOLOGICALUNIVERSITY
    Apr 2008 - Aug 2013 (5 years 5 months)
  • Coursera
    Java Developer Professional Certificate
    Coursera
  • Amazon Web Services
    AWS Certified Solutions Architect – Associate –
    Amazon Web Services
  • Coursera
    TypeScript Developer Professional Certificate
    Coursera
  • i
    in Dynamic Environments
  • Amazon Web Services
    AWS Certified Solutions Architect – Associate
    Amazon Web Services
  • A
    AWS Certified Solutions Architect – Amazon Web Services
  • F
    Fosters
  • Coursera
    Node.js Developer Professional Certificate
    Coursera
  • Coursera
    Machine Learning Specialization
    Coursera
  • D
    Generative AI with Large Language Models –
    DeepLearningAI
Projects (professional or personal) verified_user 0% verified
  • M
    Market-Defining E-commerce Platform
    Developed and maintained a fullstack e-commerce web application using Java and React.js, integrating Python for data automation and processing. Managed the complete software lifecycle from design to deployment. Designed a Java backend for real-time data analytics integrated with a React.js frontend, using Python for data handling and automated processing. Development: Built a CRM system with a Java backend and React.js frontend, using Python for backend data ensuring seamless and improving performance.
  • R
    Real-Time Analytics System
  • E
    ERP System
  • E
    E-Commerce Platform
  • V
    Voting Election System
  • O
    Orca Solana DEX Bot
  • R
    Repair Management using AWS
    System: Developed a backend system using Node.js, NestJS, and TypeScript, with a Vue.js frontend, improving the system's speed and scalability. Built backend services in TypeScript with Node.js and NestJS, and used React.js and Next.js for the UI, optimizing trading functionalities. Developed a full-stack e-commerce platform using TypeScript with Node.js and NestJS for the backend, and React.js and Next.js for the frontend, managing product and order workflows. Led the development of an ERP system using Node.js, NestJS, and TypeScript, managing backend services, and using Vue.js for the frontend to handle complex business workflows. Created a voting system using Node.js, NestJS, and TypeScript for secure backend operations, and Vue.js for r
  • A
    AI Testing & Workflow Optimization
  • A
    AI & API Development for Client Solutions
    Designed and implemented APIs to integrate AI models into client systems, leveraging 5 years of AI integration experience to ensure smooth deployments. Led multiple AI testing projects over the last 5 years, evaluating new model versions, creating test scripts, and improving AI functionality across diverse applications.