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Guillem Monterde
Guillem Monterde

Full-Stack Engineer (Cloud/DevOps)

Open to offers · Member since 28 Sep 2026
Message
Location
Barcelona, Spain
Desired salary
Unspecified
Work preference
Remote Only / Full Time, Freelance
Experience level
Lead

About

Professional summary

I am a self-taught full-stack software engineer based in Barcelona, with experience growing from junior developer to lead engineer. I specialize in building scalable web, mobile, and cloud-based SaaS products from end to end.

I have owned the architecture, development, deployment, and maintenance of multi-tenant B2C and B2B platforms. My work spans customer applications, admin back offices, partner portals, billing systems, booking flows, payments, invoicing, and customer communications.

I am experienced with Python, Node.js, TypeScript, React, React Native, PHP, and modern cloud-native development on Google Cloud Platform. I enjoy translating business requirements into reliable technical solutions and taking ownership of both backend systems and infrastructure.

I have led a small engineering team, set technical direction, made architecture decisions, and established engineering practices. I also work directly with stakeholders and customers, handling onboarding, post-launch support, and evolving platform capabilities based on business needs.

My recent work includes conversational AI booking agents, Stripe Connect marketplaces, recommendation systems using machine learning, and Spanish Veri*Factu e-invoicing compliance integrations. I bring a product-minded approach that combines engineering depth with practical experience in digital marketing, SEO, and customer-focused web development.

Skills

46 capabilities
AngularAPI DevelopmentBackend DevelopmentBigQueryCI CDCloud ArchitectureCloud FunctionsCommunity ManagementDevOpsDockerfastAPIFirebaseFirestoreFlaskFrontend DevelopmentGeminiGoogle AdsGoogle AnalyticsGoogle Cloud PlatformIonicJavaScriptJoomlaMachine LearningMobile DevelopmentNext.jsPandasPayment ProcessingPHPPythonReactReact NativeRecommendation SystemsSaaS Developmentscikit learnSEMSEOSHA 256SOAPSoftware ArchitectureStripe BillingTerraformTwilioTypeScriptWeb DevelopmentWordPressXML

Tech stack & tools

Working toolkit

Application Hosting

Cloudflare

Application Utilities

Twilio

Data Stores

MySQL

Development

DockerGitGitHubTerraformWordPress

Languages & Frameworks

HTML5JavaScriptNode.jsPHPPythonReact

Libraries

Pandas

Experience

Career history

Fullstack / Lead Software Engineer SAAS Adamantium First (Estetical)

Grew from a freelance engagement into a long-term embedded engineering leadership role, setting technical direction and making architecture decisions. Led a three-person engineering team consisting of one backend engineer and two junior frontend engineers, while establishing engineering practices from scratch.

Architected and built a multi-tenant SaaS platform end-to-end, including customer web and mobile applications, an admin back office, a partner portal, billing, booking, payment, invoicing, and reminder capabilities for B2C and B2B customers. Owned GCP backend and cloud infrastructure, built a conversational AI voice booking agent, a recommendation microservice, and a Spanish AEAT Veri*Factu e-invoicing compliance integration. Managed direct client relationships, onboarding, and post-launch support.

JavaScript & PHP Developer Milcontratos Online, S.L.

Started the first dedicated software development role after transitioning from a marketing and web background into engineering.

Built and maintained web projects using JavaScript and PHP, gaining foundational professional experience in software development and web application maintenance.

Digital Marketing & Web Various Employers and Freelance

Worked across digital marketing, community management, SEO, SEM, Google Ads, and Google Analytics roles in the Barcelona area.

Delivered increasingly technical freelance web work using WordPress, Joomla, early Angular, and Ionic projects before transitioning fully into software development.

Education

Learning history

Universitat de Girona (UDG) / Escola Mediterrani

Bachelor's degree, Digital Marketing + Chinese

Bachelor's degree focused on digital marketing and Chinese.

UPC (Universitat Politècnica de Catalunya)

JEDI Course, Mobile App Development

Short course in mobile app development.

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