06/19/2026 updated

MV
100 % available

Senior Full Stack Software Engineer | React | Node.js | AWS | Microservices

cadiz, Spain
Only remote
Engineer in Software Development
cadiz, Spain
Only remote
Engineer in Software Development

Profile attachments

INSUS_MARCOS_CV_vJun2026.docx.pdf

About me

Senior Full Stack Software Engineer with 15+ years of experience in cloud-native applications, microservices, React, Node.js, Python, and AWS. Proven track record delivering scalable, high-performance digital solutions and leading software development across international teams.

Android (Software)C++ (Programming Language)Python (Programming Language)C-Basierte Programmiersprachen NetApp ApplicationsRedisSQL DatabasesTypeScriptGoogle CloudGitFastAPIAmazon Relational Database ServiceFull Stack DevelopmentAngular UiDockerMicroservices
Full-Stack Development: React, JavaScript/TypeScript, Node.js, Python (FastAPI)
Cloud & DevOps: AWS (Lambda, RDS, S3), Docker, CI/CD, Serverless Architecture
Software Architecture: Microservices, Distributed Systems, API-First Design, Event-Driven Architectures
Data & AI: REST/GraphQL APIs, LLM Solutions, RAG, Vector Databases, Workflow Automation
Engineering Leadership: Technical Leadership, Agile Delivery, Cross-Functional Collaboration
Core Strengths: Scalability, Performance Optimization, Clean Architecture, Cloud-Native Solutions, End-to-End Product Delivery.

Experience

Professional experience10+ years
Freelancer since2013

Languages

EnglishFluentSpanishNative speaker

Project history

AI & Fullstack Lead Software Engineer

INSUS Consultant
Designed and delivered production-grade full-stack systems using modular microservices architecture. Built React-style modular frontend components for internal web-based AI tools and dashboards. Developed backend services using Node.js and Python FastAPI microservices. Implemented API-first architecture with REST and GraphQL-compatible patterns for data retrieval systems. Designed scalable AWS-based cloud infrastructure using Lambda and managed services. Built CI/CD pipelines for automated deployment and system reliability. Introduced system observability, monitoring, and performance optimization practices.

Freelance AI Software Engineer

Freelance
Developed full-stack web applications with backend APIs and frontend interfaces. Built React-compatible UI components for AI-driven web platforms. Designed backend services using Node.js and FastAPI. Integrated data retrieval pipelines with API-based architectures using REST and GraphQL-like query structures. Deployed scalable cloud applications using AWS and containerized environments. Built automation systems using orchestration tools such as n8n.

Lead App Developer

Serial Readers, Grupo Planeta
Led a development team to scale an interactive storytelling mobile app to 80,000+ downloads. Led development of a React-like component-based mobile and web application architecture. Built and maintained reusable UI components and modular frontend systems. Designed backend services supporting mobile and web platforms. Implemented AWS infrastructure including Lambda-based services and cloud scaling optimization. Reduced infrastructure costs by 40% through AWS optimization strategies. Led cross-functional engineering team and managed product delivery lifecycle.

Lead Unity Developer

Proximity
Built interactive application systems with backend integration and API-driven architecture. Worked on real-time systems with performance-critical UI components. Collaborated with clients and engineering teams in full product lifecycle delivery.

Unity Developer

Hikaru Agency
Solely responsible for the VR port of an educational game for Android and Samsung Gear VR, optimizing performance and gameplay mechanics.

Backend Web Developer

TeamCMP
Developed backend systems using LAMP stack and API-based architectures. Built CMS platforms and data-driven web applications. Implemented caching and performance optimization systems. Delivered scalable backend services for high-traffic platforms.

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