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Luis Ramírez CalleLR

Luis Ramírez Calle

B2B SaaS Development, Automation, AI, Auditing

€480/day
Las Palmas de Gran Canaria, ES
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Luis

I help startups, SMEs, and product teams transform ideas, manual processes, or unstable applications into scalable, maintainable, and business-oriented web software.

I analyze the problem, technical risks, integrations, and costs to build a useful solution from day one.

I can help you with:
  • MVP and B2B SaaS product development.
  • Custom web applications.
  • Multi-tenant architectures.
  • Process and workflow automation.
  • AI, LLM, RAG, and agent integration.
  • Integrations with CRM, ERP, payments, and APIs.
  • Application modernization and rescue.
  • Technical audits for architecture, performance, and costs.
  • Support as an external CTO or technical lead.

My Working Method

I combine development, architecture, and product vision. I prioritize maintainable code, security, performance, scalability, and infrastructure cost control.

I can handle a complete project or get involved in a specific phase: technical discovery, architecture, development, integration, auditing, or evolution of an existing platform.

Technologies

TypeScript, JavaScript, Vue, Nuxt, Node.js, PostgreSQL, REST APIs, Docker, Cloudflare, serverless, and generative AI.

My goal is to help you reduce risks, accelerate time-to-market, and build a solid technical foundation that allows the product to evolve without constant refactoring.
  • Spanish

    Native or bilingual

  • English

    Fluent

Can work on-site
Las Palmas de Gran Canaria (up to 30km)

Experience

  • Oncoviva
    Senior Full Stack Engineer
    MEDICAL
    November 2025 - Today (9 months)
    Las Palmas, Spain
    I'm developing an educational tech platform designed to bridge the gap between theoretical documentation and real-world enterprise implementation.
    • - Technical Simplification: Created accessible and pragmatic technical content designed to address the lack of context found in traditional abstract examples.
    CTO TypeScript React.js NestJs PostgreSQL
  • TALKUAL
    Tech Lead
    E-COMMERCE
    May 2023 - November 2025 (2 years and 6 months)
    Lleida, Spain
    • Development and maintenance of a fruit and vegetable e-commerce platform.
    • Frontend migration from Nuxt 2 to Nuxt 3.
    • Odoo ERP integration.
    • Management of the IT department and the company's technology strategies.
    Node.js Nuxt.js Odoo Strapi PostgreSQL
  • tuklo
    Full Stack Developer
    LOGISTICS AND SUPPLY CHAIN
    July 2022 - May 2023 (10 months)
    Seville, Spain
    • Saas development
    • Tuklo: Saas for last-mile package delivery.
    • MoxDelivery: Saas for home food delivery.
    PHP Laravel AWS Vue.js

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Education

  • Engineer's Degree, IT Applications
    University of Las Palmas de Gran Canaria
    2016
    Engineer's Degree, IT Applications

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