Freelance Software Architects in SpainFreelance Software Architects in Spain
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Marcel Stredak's avatar
Marcel Stredak
pro03730 Xàbia, Spain
Senior Full-Stack Architect & Strategic Product Lead
$10k+
Earned
3x
Hired
5.0
Rating
21
Followers
Senior Full-Stack Architect & Strategic Product Lead
Cover image for Domior: A Config-Driven Question Flow for Property Site
Domior: A Config-Driven Question Flow for Property Site
1
5
Cover image for Interactive Architectural Portfolio and System Simulator
Interactive Architectural Portfolio and System Simulator
1
22
Cover image for Self-hosted Multi-User SaaS with Logic Overrides
Self-hosted Multi-User SaaS with Logic Overrides
0
7
Cover image for AI SaaS Platform with Multi-User Accounts and Payments
AI SaaS Platform with Multi-User Accounts and Payments
0
9
Software Architect(5)
Esteban Aleart Salas's avatar
Esteban Aleart Salas
Madrid, Spain
Full Stack Dev & SaaS Architect, scalable B2B platforms.
New to Contra
Full Stack Dev & SaaS Architect, scalable B2B platforms.
Cover image for I designed and developed the
I designed and developed the La Carolina website, utilizing technologies such as Next.js and React. The website is responsive and features a modern and minimalist user interface. I implemented a gallery of images and a contact form for visitors to send messages to the company. Skills demonstrated * Development of web applications with Next.js and React * Design of modern and minimalist user interfaces * Implementation of image galleries and contact forms * Deployment of websites on Vercel -- Results * A modern and attractive website that clearly and concisely presents the company and its services. * A responsive website that adapts to different devices and screen sizes. * A contact form that allows visitors to send messages to the company in a easy and secure way.
0
40
Cover image for Zweifel Capital is a financial
Zweifel Capital is a financial services website developed to present investment strategies, institutional services, and market insights for client engagement and brand positioning. The platform focuses on clarity, trust, and responsive delivery across devices, helping visitors access key information efficiently. Designed and developed a responsive and user-centric interface with clean navigation. Built scalable front-end components, optimized for performance and accessibility. Structured content to reinforce brand credibility and professional positioning. Integrated dynamic sections for insights, services, and contact workflows. Delivered well-documented, maintainable code with clear architectural patterns. Tech stack highlights: Next.js / React, responsive design, performance optimization, modern UI/UX standards.
0
59
Cover image for Lyons One is a web‑based
Lyons One is a web‑based CRM built for managing leads in an educational platform headquartered in Uruguay. The project focuses on streamlining lead capture, tracking, and conversion processes through intuitive admin tools and clear performance metrics. Key features include: Lead registration and segmentation by source, interest, and status Conversion pipeline visualization Lead search, filter, and activity tracking Analytics to improve lead generation and follow‑up strategies Technologies used: Next.js, React, Node.js, PostgreSQL, Tailwind CSS My role encompassed full‑stack architecture design, frontend and backend development, implementation of real‑time data features, and deployment.
0
62
Cover image for Nakama (wearenkm.com (http://wearenkm.com)) es un
Nakama (wearenkm.com (http://wearenkm.com)) es un ecosistema de consultoría y desarrollo enfocado en la creación de productos digitales escalables. Trabajamos con startups y empresas en crecimiento para diseñar, construir y evolucionar plataformas web, SaaS y soluciones basadas en inteligencia artificial. Nuestro enfoque combina desarrollo full stack (JavaScript, React, Next.js), arquitectura de sistemas e integración de tecnologías modernas como APIs, automatización y modelos de IA (embeddings, RAG), permitiendo transformar ideas en productos sólidos y preparados para crecer. Más que desarrollo, en Nakama aportamos visión técnica y de producto, ayudando a tomar decisiones estratégicas que eviten deuda técnica y aseguren escalabilidad a largo plazo.
0
25
Software Architect(3)
Arnau Sastre's avatar
Arnau Sastre
proBarcelona, Spain
Analista de Datos | Insights, modelos | optimización | ML
Analista de Datos | Insights, modelos | optimización | ML
Cover image for Built a centralized investment analytics
Built a centralized investment analytics and business intelligence platform to automate KPI tracking, operational reporting and executive dashboards. The solution integrated multiple data sources into a single decision support system, eliminating manual reporting while providing daily insights into investments, clients, providers and overall business performance. The platform included automated data pipelines, KPI monitoring and executive dashboards designed to support faster and more informed business decisions.
0
27
Cover image for Multi-Horizon Demand Forecasting Designed and implemented
Multi-Horizon Demand Forecasting Designed and implemented a multi-horizon demand forecasting system for an e-commerce business to improve inventory planning and operational decision-making. The solution generated forecasts across multiple planning horizons while automating forecasting workflows and scenario analysis. This enabled business teams to make more informed purchasing and inventory decisions while reducing manual forecasting efforts.
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21
Cover image for Credit Risk Modeling Developed a machine
Credit Risk Modeling Developed a machine learning solution for consumer credit risk assessment, helping improve lending decisions through predictive analytics. The project included feature engineering, model evaluation and probability calibration to deliver reliable risk predictions while supporting regulatory and business requirements. The final solution provided a scalable analytical framework for consistent and data-driven credit decision making.
0
23
Cover image for Designed an AI-powered decision support
Designed an AI-powered decision support system combining quantitative models, machine learning and deep learning techniques to analyze financial markets. The platform automated data collection, strategy evaluation and backtesting, providing a scalable framework for continuous strategy development. The project demonstrated how advanced analytics can support systematic and data-driven investment decisions.:
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33
Software Architect(1)