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About

Full Stack Developer based in Madrid, specializing in JavaScript ecosystems and system integration. Building scalable systems that transform complex business challenges into efficient, maintainable solutions. The approach combines technical excellence with a deep understanding of business needs, delivering solutions that work well today and scale seamlessly as organizations grow.

Work focuses on the intersection of software development, system integration, and data engineering. Expertise lies in identifying bottlenecks within existing workflows and designing solutions that eliminate manual overhead while maintaining reliability and scalability. Every system built is designed with maintainability, team collaboration, and long-term growth in mind.

Currently serving as Software Developer at Tolentino Abogados (Legal Tech), providing technical leadership and defining the firm's digital architecture. Responsibilities include full stack development using Angular, React, Node.js, and Express, system integration with N8N, Zapier, and Node-RED, and integration of external services like Google API, Slack, and Notion via REST and Webhooks. Also optimizing Google Workspace with Apps Script and managing IT infrastructure with Docker.

Previously at Keldai AI Solutions, specializing in data processing systems. Built ETL workflows and data processing pipelines using Python, integrated and indexed data with Elasticsearch for fast querying, and implemented dashboards in Kibana for real-time monitoring. Worked on backend development with Node.js, managed deployments using Docker and Kubernetes, and collaborated in multidisciplinary teams under Agile methodologies.

Work philosophy centers on clean code, efficient architectures, and continuous learning. Building solutions that are not just functional but also well-documented, testable, and easy for teams to understand and extend. This approach has enabled delivering systems that reduce operational costs, improve productivity, and provide measurable business value.

Experience

  • Tolentino Abogados — Software Developer (Legal Tech)
    April 2025 — Present, Madrid

    Technical leadership and definition of the firm's digital architecture. Workflow automation with N8N, Zapier, and Node-RED for API and database integration. Full stack development using Angular, React, Node.js, and Express. Integration and orchestration of external services (Google API, Slack, Notion) via REST and Webhooks. Optimization of Google Workspace with Apps Script and automated reporting. IT infrastructure administration with Docker, access control, and data backup management.

  • Keldai AI Solutions — Software Developer
    October 2024 — March 2025, Madrid

    Automation of ETL workflows, web scraping, and data processing using Python scripts. Integration and indexing of data with Elasticsearch for fast querying. Implementation of dashboards in Kibana for real-time monitoring and visualization. Backend development focused on data analysis and processing with Node.js. Reproducible and scalable deployments using Docker and Kubernetes. Collaborative work in multidisciplinary teams under Agile methodologies (Scrum).

Education

  • Full-Time Software Development Bootcamp
    ISDI Coders | January 2024 — May 2024, Madrid

    Full Stack web development using Angular, React, NestJS, and Express.js. Designed and implemented RESTful APIs integrated with PostgreSQL and MongoDB databases. Implemented JWT authentication, data validation with Joi, and efficient middleware handling. Built responsive front-end interfaces using HTML5, CSS3, TypeScript, and JavaScript ES6+. Applied TDD, followed GitFlow, and managed version control with Git/GitHub including code reviews. Deployed applications on cloud environments (Render, Vercel) following Agile Scrum methodologies.

  • Higher Technician in Web Application Development
    EscuelaArte Granada | September 2019 — June 2021, Granada

    Frontend and backend development with Java, JavaScript, and MySQL. Designed, modeled, and managed relational databases using SQL. Developed REST web services and performed basic server configuration. Applied UX/UI principles, accessibility standards, and user-centered design. Final project: developed a complete web application integrating all layers (frontend, backend, and database).

Tech Stack

Languages

JavaScript • TypeScript • Java • Python

Frontend

Angular • React • HTML5 • CSS3 • JavaScript ES6+

Backend

Node.js • Express • NestJS • REST APIs • JWT • Joi

Databases

MongoDB • PostgreSQL • SQL • NoSQL • Elasticsearch

Automation & Integration

N8N • Zapier • Node-RED • Google Workspace API • Apps Script • Slack API • Notion API • Trello • Webhooks

Data & Analytics

Elasticsearch • Kibana • ETL Pipelines • Web Scraping • Data Processing

DevOps & Infrastructure

Docker • Kubernetes • Git/GitHub • GitFlow • CI/CD

Project Management

Trello • Agile (Scrum) • GitFlow

Methodologies & Practices

Agile (Scrum) • TDD • Automated Testing • Code Reviews • Version Control

Key Achievements

  • Process Automation: Achieved 70% reduction in execution time by automating manual workflows, directly impacting operational efficiency and reducing human error. This translated to significant cost savings and allowed teams to focus on high-value tasks.
  • Real-time Analytics: Built comprehensive dashboards that provide instant visibility into business metrics, enabling data-driven decision making across teams. These dashboards reduced reporting time from hours to minutes, improving organizational agility.
  • System Integration: Successfully integrated multiple external platforms including Google Workspace, Slack, and Notion, creating seamless workflows that eliminate context switching and data silos. This integration reduced workflow friction by 50% and improved team collaboration.
  • Data Processing: Designed and implemented ETL pipelines capable of processing millions of records efficiently, ensuring data quality and system performance at scale. These pipelines enabled real-time data insights that were previously impossible with manual processing.
  • Performance Optimization: Optimized complex queries using Elasticsearch, reducing response times by 80% and enabling real-time insights from large datasets. This improvement directly enhanced user experience and system scalability.
  • Infrastructure: Implemented containerization strategies with Docker, improving deployment consistency by 90% and enabling scalable, portable applications. This reduced deployment time from days to hours and eliminated environment-related issues.

Methodology & Approach

Development approach is centered on understanding business needs first, then designing technical solutions that align with organizational goals. Iterative development, starting with core functionality and gradually enhancing features based on real-world usage and feedback.

Prioritizing clean, maintainable code and well-documented systems. Every solution built is designed with future scalability, team collaboration, and long-term maintainability in mind. Following best practices in software architecture, design patterns, and testing to ensure quality and reliability.

Availability

Currently available for select projects and collaborations focused on system integration, full stack development, and data engineering challenges. Particularly interested in projects that involve solving complex technical problems while delivering measurable business value.

Get in Touch

Let's build something impactful together

If you're working on something interesting or have a project in mind, I'd love to hear from you. Whether it's a collaboration, a challenging problem to solve, or just a conversation about technology and automation.

antonio.quijanoberne@gmail.comView full contact details →

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