Borja Lledó López
Software Engineer and Senior Fullstack Developer with a strong track record of building digital products and e-commerce platforms in fast-paced startup environments. Primarily specialized in Backend architecture using PHP and JavaScript/Node.js (Express, NestJS) and the integration of payment gateways (such as Stripe and Redsys), I also hold dedicated experience in Frontend development with JavaScript using frameworks and libraries like React, Next.js, Vue, and Nuxt. Proficient in leveraging Redis and RabbitMQ for performance optimization and messaging architectures, alongside working knowledge of Java, Python, and AWS cloud services. I bring a comprehensive understanding of the full software development lifecycle, solid engineering standards, and a practical approach to solving complex technical challenges.
Experience
Senior Fullstack Developer
Feature Development: Designed and implemented new core features and continuous enhancements for the main platform dedicated to corporate data and business documentation.
Payment Gateways Integration: Integrated and maintained electronic and recurring payment solutions using Stripe and GoCardless to streamline subscription management and financial transactions.
Data Engineering & Processing: Assisted in organizing, extracting, and processing large datasets and business documentation for French companies.
Highlighted project
Design and Implementation of a Token-Monetized Public REST API
Engineered an enterprise-grade public REST API enabling client access to massive business datasets. Implemented a dynamic token-consumption system scaled by request complexity, alongside advanced security controls, strict rate limiting, and requests-per-second throttling to prevent abuse and ensure high availability.
Senior Fullstack Developer
Order Processing & Internal Logistics: Engineered and optimized post-purchase workflows, handling database registration and warehouse preparation across fulfillment centers in Spain, Portugal, France, and Italy.
Carrier Integrations: Integrated and automated shipping processes with multiple logistics providers (SEUR, MRW, Chronopost, etc.) dynamically assigned based on delivery destination.
International Partner Synchronization: Developed automated order synchronization systems with key third-party providers operating in major international markets such as the UK and Germany.
Florist Management WebApp: Built a dedicated web application for global local florist networks to manage orders, update delivery statuses, and upload proof-of-delivery photos.
Smart Order Allocation Algorithm: Designed and implemented an automated order allocation and auction algorithm that assigned orders to local florists based on proximity and historical delivery quality metrics.
Highlighted project
Re-engineering and Core Logistics Migration to Symfony
Spearheaded the technological modernization of mission-critical e-commerce operations, migrating a legacy codebase (dating back to 2009) to a modern Symfony architecture in 2023. Refactored high-impact subsystems, including third-party and warehouse order routing, the Customer Order Review platform, and carrier selection automation with real-time shipping label generation and printing.
Senior Fullstack Developer
Infrastructure Tooling Development: Built internal web applications for a leading banking institution to manage, track, and streamline the end-to-end server provisioning workflow for data centers.
Multi-Agent Workflow Orchestration: Automated the server request and configuration process, enabling distinct operational teams to specify software packages, system requirements, and security policies.
Compliance & Traceability Validation: Implemented step-by-step verification checks to ensure all critical security guidelines and configuration benchmarks were met prior to final delivery and rack mounting in the data center.
Highlighted project
Enterprise BPM Modernization & Vue.js Frontend Leadership
Technical lead for the frontend redevelopment during the modernization of a custom Business Process Manager (BPM) platform, migrating away from legacy Yii Framework and jQuery to a modern Laravel and Vue.js stack. Championed the adoption of Vue.js for the client side while contributing to backend engineering, delivering a highly reactive, maintainable UI optimized for complex banking workflows.
Frontend Developer
Frontend Feature Development: Dedicated exclusively to client-side development, building new key features for a hospital workforce management application.
Legacy Migration & Modernization: Played an active role in migrating the core application architecture from Backbone.js to React, significantly improving maintainability, system performance, and user experience.
Component Architecture: Designed reusable UI components and managed application state to meet the complex operational workflows required in healthcare environments.
Highlighted project
Hospital Management UI Migration to React
Co-spearheaded the technical initiative to modernize the healthcare workforce management application, driving the client-side architecture transition from Backbone.js to React. This migration significantly eliminated technical debt, improved UI performance, and delivered a scalable, component-driven user experience for daily hospital operations.
Fullstack Developer
Career Growth & Precision Frontend Development: Joined the team prior to university graduation following a successful internship. Worked closely with the creative design team to transform complex, highly custom UI/UX designs into pixel-perfect web experiences with high quality standards.
Custom CMS Engineering: Built and maintained custom e-commerce solutions utilizing a proprietary CMS developed on top of PHP (Yii Framework).
E-commerce Platform Customization: Developed custom modules and extensions for PrestaShop to tailor platform functionality to specific client business requirements.
Highlighted project
End-to-End Engineering & Advanced Customization of a PrestaShop E-Commerce
Took full technical ownership of the end-to-end architecture, custom development, and deployment of my first dedicated e-commerce project. Executed deep custom engineering on PrestaShop, building custom modules and modifying platform logic to satisfy specific business requirements while delivering a pixel-perfect frontend matching high-standard design specifications.
Technical Skills
Education
B.S. in Computer Engineering
University of Alicante
High School Diploma (Scientific-Technological Track)
I.E.S. Enric Valor
Secondary Education Certificate (ESO)
I.E.S. Enric Valor
Contact
Have a project in mind? Write to me and I will get back to you as soon as possible.