DVAbout Danilo
Is your product scaling, but your engineering velocity slowing down?
I specialize in the "Haunted Forest" phase of scale-ups: when legacy code, slow CI/CD pipelines, and architectural debt threaten to stop business growth.
I am a Fractional Staff Engineer & Technical Director with 15+ years of experience in high-scale marketplaces (Kleinanzeigen, LeBonCoin, Adevinta). I don't just write code; I design the systems and culture that allow your team to ship faster.
🚀 How I help:
1. Legacy Modernization (The "Safe" Rewrite)
I guide teams through high-risk migrations without stopping the business.
Moving from Monoliths (Java/PHP) to Modern Stack (Next.js, Node.js).
Migrating from Legacy React/SPA to Performance-first Architectures (Astro, Server Components).
2. Platform Engineering & Cost Reduction
I audit and rebuild infrastructure to slash waste.
Case Study: Reduced build times from 50m → 9m for a major platform.
Optimizing CI/CD pipelines (GitHub Actions) to save €20k+/year in infrastructure costs.
3. Technical Direction (Fractional)
For companies that need Staff-level leadership but aren't ready for a full-time hire.
Architecture Review & Decision Records (ADRs).
Mentoring Senior Engineers to Staff level.
Unlocking high-performance through Neuro-inclusive leadership.
🛠 The Stack:
Core: TypeScript, Node.js, React, Next.js, Astro.
Platform: Docker, Kubernetes, GitHub Actions, Cloudflare.
Performance: Core Web Vitals, Edge Computing.
Why Fractional?
You get strategic clarity and high-leverage implementation for a flat weekly retainer, often delivering more value in 2 days than a mid-level developer delivers in 5.
Based in Barcelona. Available for Remote Leadership across Europe.
Spanish
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- KleinanzeigenStaff Web Platform EngineerJanuary 2023 - Today (3 years and 5 months)Barcelona, SpainDriving platform architecture for Germany's leading marketplace during a critical period of infrastructure consolidation and subsequent decoupling from the Adevinta portfolio.
- Danilo Velasquez ConsultingIndependent Staff Engineer / Web Architecture ConsultantE-COMMERCENovember 2025 - Today (7 months)Barcelona, SpainI partner with engineering leadership (CTOs/VPs) to untangle complex frontend architectures.Specialized in:• - De-risking Migrations: Moving from legacy distributed/monolith apps to Monorepos without halting feature development.• - Performance Audits: Identifying bottlenecks in Web/TypeScript/NodeJS applications.• - Team Topology: Setting up platform teams to serve multiple product streams.
- AdevintaTechnical Lead FrontendE-COMMERCEMay 2022 - March 2023 (10 months)Barcelona, SpainThis project is built using TypeScript, Webpack, Lerna, ESBuild and React. The PoC of the product was made using a Micro Frontends architecture with Webpack Module Federation and dynamic runtime configurations, allowing us to update the versions of the micro-apps independently and without having to deploy anything.This project is built using TypeScript, Webpack, Lerna, ESBuild and React. The PoC of the product was made using a Micro Frontends architecture with Webpack Module Federation and dynamic runtime configurations, allowing us to update the versions of the micro-apps independently and without having to deploy anything.Skills: React.js · Micro Frontends · CD/CI · JavaScript eXtension (JSX) · PostCSS · Server Side · Chrome · Webpack · Single Page Applications · Problem Solving · Leadership · TypeScript · Hypertext Transfer Protocol (HTTP)
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Education
- Associate's degreeInstituto Profesional IACC2019Associate's degree