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Santi EspadaSE

Santi Espada

Senior Full‑stack Engineer: TypeScript/Node/React+

€440/day
Madrid, ES
8-15 years

Average response time: 1 hour

About Santi

I consider myself a creator and a builder, one that happens to love technology and the way it empowers and enables us to solve problems and drive memorable experiences for everyone.

I help product teams ship fast, reliable web platforms that scale. With 8+ years across media outlets, NGOs, e‑commerce/adtech, fintech and banking among other sectors, I blend backend depth with frontend craft to turn ideas into production software - quickly and safely.

I typically join to build from scratch or to level up an existing codebase: designing and implementing APIs and microservices (Node.js, Python/Django/FastAPI), building performant SSR frontends (Vue/Nuxt, React/Next), and setting up CI/CD and cloud on AWS (Docker, Kubernetes, Terraform). I’ve led R&D from concept to launch, shipping AI/LLM‑powered features like visual shopping and contextual ads. Expect pragmatic engineering, clear communication, and a focus on business impact and developer experience.

Deliverables I often own: MVPs and feature slices, production APIs, data and third‑party integrations, design‑system components, performance/accessibility improvements, deployment pipelines, technical audits, and hands‑on team enablement.

Immediately available with full‑time capacity. Remote‑first (100%); happy to visit on‑site occasionally in Spain and across Europe. Spanish (native), English (C1)
  • Spanish

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • nc43tech
    Backend Engineer
    July 2023 - March 2025 (1 year and 8 months)
    Back on nc43tech, worked on various projects:
    - Adsviu, an AI-powered cookieless contextual advertisement platform.
    - Multimarkts, a visual shopping platform with AI features designed to enhance user engagement and monetization for media outlets and individual content creators.
    - Billionhands (v2), the reborn of the project. We're now building an AI enhanced rankings platform about everything you can think of. Vote for the best!
  • Secfi
    Backend Engineer
    May 2022 - January 2023 (8 months)
    Amsterdam, NH, Netherlands
    Secfi is the leading financial advisor for tech people, combining learning resources with powerful tools to get insights into your equity and offering financing among other resources to give back power to the people actually building the tech space. I worked mostly in the Planning Domain, specially in the Equity Planner, an all in-one tool to help you understand your exercise costs in detail, giving you all the info you need to act wisely.
  • Billionhands
    Backend Developer
    December 2019 - March 2022 (2 years and 3 months)
    Madrid, Spain
    nc43|tech constitutes the technology branch of the NextChance group, known for their success with the spanish startup La Nevera Roja (adquired later by Just Eat). My job was focused on Billionhands, a platform that aimed to become the "Google for offers", providing access to more than 15M offers from stores all over the internet. In my last period there, we relaunched it with a focus on just fashion and home-deco and introduced visual search features.

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Education

  • Bachelor of Science
    The Open University
    2019
    BSc (Honours) Computing and IT
  • Grado en Ingeniería Informática
    Universidad Carlos III de Madrid
    2018
    Grado en Ingeniería Informática

Skill set

Categories