Freelancer profile translated to English.
Back to original languageAbout Levi
I am Levi Esteller, asenior full-stack developerwith over 10 years of experience creating complex web platforms, SaaS, ERP integrations, and corporate applications. I work personally on each project and, when the scope requires it, I have the support of a small, trusted technical team with whom I have collaborated for years. This allows me to offer the closeness of a freelancer and the technical capacity of a senior team.
I specialize in developing custom solutions of high complexity, with advanced logic, multiple roles, external integrations, security, and scalable architecture.
Featured Experience
- Global order platform for IDP Direct, used by stores like Loewe, Prada, Louis Vuitton, Scalpers, Celine, or Calvin Klein. Integration with NetSuite ERP.
- CRM + quote manager + pipeline for BAXI Group, integrated with ERP M3, used as a product master in several companies.
- Industrial kitchen configurator for Rosinox (Ali Group) with pricing, CAD drawings, and technical sheets.
- More than 10 interactive web apps for museums in Europe and the USA for Mediapro.
- Several end-to-end MVPs, including one in pilot with Danone and AWS.
- Development of a subscription-based social network with thousands of users in Spain.
What I Bring
- Full-stack development (backend, frontend, databases, and APIs).
- Design of scalable architectures and business-oriented systems.
- Complex integrations: NetSuite, M3, external APIs.
- Building SaaS, CRMs, dashboards, and configurators.
- Clean, documented, and maintainable code.
- Capacity for complete projects or team reinforcement.
Technologies
React, Next.js, TypeScript, Python, Django, FastAPI, Node.js, PHP, Symfony, Laravel, PostgreSQL, MySQL, MongoDB, AWS, Docker, CI/CD.
I am currently looking for new clients and have immediate availability.
I propose scheduling a video call without any commitment.
Spanish
Native or bilingual
English
Fluent
Catalan
Native or bilingual
Remote only
Primarily works remotely
Experience
- Offing Web SolutionsProgrammer and Project ManagerSOFTWARE PUBLISHINGFebruary 2016 - September 2025 (9 years and 7 months)Barcelona, SpainFor over nine years, I worked as a senior developer and technical lead, managing the development of complex web platforms, custom SaaS, and integrations with corporate systems. I designed architectures, developed backend and frontend, defined data models, and coordinated end-to-end projects with international clients.I participated in the development of high-impact projects, such as:Global order platforms and advanced integrations with ERP (NetSuite, M3).Industrial configurators with generation of plans, pricing, and technical documentation.Interactive web apps for museums in Europe and the USA.Complete MVPs ready for validation with real users.Systems with multiple roles, complex logic, and scalability and security requirements.This period allowed me to gain a complete vision of the development cycle and a solid foundation to work today as a senior freelancer, providing robust, scalable solutions aligned with real business needs.
- Offing.esProgrammer and Project ManagerOctober 2012 - January 2016 (3 years and 3 months)I managed several development projects, including a custom CRM for one of the BAXI group companies.
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Education
- Software Engineering & Continuous Technical TrainingMultiple Accredited Online Programs (Microsoft, AWS Training, Udemy, etc.)2010Full-stack development, software architecture, cloud fundamentals, DevOps basics, API design, databases, security principles and modern web technologies (React, Next.js, Node.js, Python, PHP).