Facundo Ezequiel Diaz Cappella

Freelancer Remote Tech Lead | Solution Architect at Independent / Freelancer

Helping startups and businesses build scalable web applications and AI solutions. Designed scalable architectures and oversaw full-stack development initiatives; Drove technical decision-making aligned with business goals and industry standards; Managed and mentored remote, multicultural teams; Advised clients on technology strategy, cloud adoption, and modern development practices.

Founder at RAG Solutions Madrid

Built and launched a SaaS platform that enables both technical and non-technical users to create custom Retrieval-Augmented Generation (RAG) pipelines with a few clicks. Designed and developed the entire product from scratch as a solo founder, using Python, FastAPI, React, Docker, cloud infrastructure, vector database, LangChain, Faiss, and NLP, integrating multiple LLMs. Selected as part of the AWS Activate program.

Technical Lead Developer at Intrum

Leading the development of a unified global client portal using Angular 18 and Spring Boot, improving the system’s scalability and performance. Spearheaded the implementation of Web Accessibility Standards, ensuring Level AA compliance. Leading a remote team, and mentoring junior and middle software developers across Europe. Translating requirements into actionable features; staying updated on latest frontend features to improve scalability, performance, and security.

Sr. Software Engineer at Celonis Hybrid - Madrid

Led development of a custom canvas engine using Angular, improving scalability and modifiability of the Celonis EMS platform. Delivered the first version of the Project Sphere App within the expected timeframe. Mentored junior developers and implemented best practices. Migrated old corporate applications into new modern Angular applications, implemented Micro Frontends, and improved deployment strategies using Kubernetes and Argo CD.

Sr. Software Engineer at Cognizant - Ford eCommerce

Led frontend development for Ford eCommerce, optimizing Angular-based applications for high user engagement and seamless experiences. Developed microservice-based applications with Java and Spring Boot, leveraging hexagonal architecture to ensure flexibility and maintainability.

Sr. Software Engineer at Duonet - Santander Bank

Developed microservices for fraud detection using Java and Spring Boot, optimizing transaction filtering and improving system performance. Achieved first deployment to production enabling fraud detection across APIs used by Santander Network branches in different countries.

Front End Lead Developer at Quality Compusoft

Led migration of legacy Windows applications to modern web applications using Angular 9; cleaned code smells, implemented best standards and practices.

Software Engineer at Resolvit International - SAS Institute

Migrated a Flash-based application to Angular, optimizing performance and user experience. Developed new APIs using Java, Spring Boot, Python and FastAPI. Collaborated with an international team.

Tech Lead at GLM

Tech Lead mentoring junior developers, delivering high-quality solutions, collaborating with the business to plan feature adaptations for the client.

Software Engineer at Terminal 6

Developed and maintained software solutions for logistics, enhancing operational efficiency while mentoring junior developers to ensure high coding standards and team growth.

Software Engineer at Accenture

Contributed to development of enterprise-level applications with focus on Javascript frontend and Java backend services.

Tech Lead | Solution Architect at Freelancer

Freelancer (Remote) delivering technical leadership and solution architecture for startups and businesses, designing scalable web applications and AI solutions, driving technical decisions, and mentoring remote teams.

Founder at RAG Solutions

Built and launched a SaaS platform to create Retrieval-Augmented Generation pipelines with a few clicks; led end-to-end product development using Python, FastAPI, React, Docker, cloud infra, vector DBs, LangChain, Faiss, and multiple LLMs.

Helping startups and businesses build scalable web applications and AI solutions. Designed scalable architectures, steered full-stack development, and mentored remote, multicultural teams while aligning technology decisions with business goals.