Elio Capella Sánchez
me@eliocapella.com • LinkedIn • Madrid, SpainI'm a technology leader and Computer Science Engineer with over 17 years of hands-on experience, leading by example to set a high bar. I build calm, high-output engineering teams where trust, ownership, and transparency turn into customer outcomes. I favor simple systems, small bets, and written decisions. I care about people first and results always.
Work Experience
Head of Engineering
Filestage - manage feedback on creative
assets
– Present
Remote
- Leading engineering for a platform serving 150,000+ monthly active users with 50+ NPS customer satisfaction
- Scaled the engineering team 6→22 in 9 months while maintaining budget constraints
- Accelerated product velocity with per-PR testing by introducing infrastructure as code to achieve multiple releases every day
- Fostered a strong team culture through regular 1:1s and career development to achieve consistent 9/10 satisfaction scores
- Helped ship AI-powered review features by unblocking technical roadblocks and adapting infrastructure to run Python ML workloads to enable sub-30-second review processing.
- Architected global infrastructure strategy for U.S. market expansion, implementing multi-region deployment and data residency compliance
- Led security initiatives that secured ISO 27017 certification and SOC 2 Type II attestation, while maintaining clean yearly audit reports
–
Remote
- Instrumental in securing €2.8M Series A funding through comprehensive technical due diligence and engineering strategy presentation
- Implemented team performance metrics to identify bottlenecks and optimize processes.
- Reduced change by failure rate by leading the adoption of automated testing (100% unit coverage + E2E browser tests), enforced via CI/CD.
- Involved in feature concept discussions to ensure reliable, performant and secure software
- Played key role in hiring: interviewed candidates, onboarded new engineers, and introduced a take home assignments.
- Enabled real time collaboration features in our app with a websocket service
- Protected our free trial from abuse to reduce infrastructure costs and allowing the team to focus on the genuine power users.
Senior Software Engineer
Filestage - manage feedback on creative
assets
–
Remote
- First full-time developer at Filestage, taking over from founders, students, and contractors to stabilize a fragile codebase.
- Implemented admin panel with impersonation capabilities to improve customer support efficiency by reducing by half the time to investigate issues
- Stabilized platform reliability from multiple weekly outages to 99.9% uptime through observability and monitoring
- Architected modular system design, reducing codebase complexity by 25K LOC and enabling faster feature development
Technical Founder
Histories - Amazing historical facts near
you
–
Madrid, Spain
- Developed cost-efficient web service powering complex geo queries at 100 req/s and 200ms p99 response time
- Developed high-quality native mobile apps achieving 99.5% crash-free sessions
- Combined our apps reached 100k MAU and 4.5/5 rating
- Hired, coached and led a small team of junior developers
- The Spanish Ministry of Culture granted the project with 50k€ (2nd out of 500 projects)
Technical Founder
Kolobee - Tourism apps
–
Madrid, Spain
- Built comprehensive platform enabling point-of-interest creation and native mobile app publishing with offline functionality
- The Spanish Ministry of Tourism granted our project with 206k€
- More than 200 apps released with our builder with a total of 250k downloads
Technical Founder
Kolobee - Interesting things nearby
–
Madrid, Spain
- Developed feature-rich geotagging social network for web and mobile platforms
- Accepted from 500 applications in a startup incubator (Desafío 22)
Software developer
BBVA - Corporate Investment Banking
–
Madrid, Spain
- Led development of critical trading systems for derivatives pricing within 20-developer team
- Automated deployment processes, reducing deployment time from hours to minutes
Software developer
Afi - finance consultancy and training
services
–
Madrid, Spain
- Improved financial web portal performance by 50% through systematic optimization
Technical Expertise
- Architecture & Platforms: AWS, Infrastructure as Code, API Design, Multi-region Deployments, Data Residency Compliance
- Leadership-enabling Technologies: CI/CD, Monitoring & Observability, Security & Compliance (ISO 27017, SOC 2 Type II), Performance Optimization
- Core Programming: JavaScript (Browser & Node.js), Java, SQL, Bash, Swift, Python
- Databases & Storage: PostgreSQL, MongoDB, SQLite, Data Architecture
- Engineering Management: Team Scaling (6→22 engineers), Technical Strategy, Hiring & Onboarding, Performance Management
- Development Practices: Test-Driven Development, Domain-Driven Design, Code Review Processes, Quality Frameworks
- Project & Product: OKRs, Agile Methodologies, Technical Due Diligence, Startup Environments
Education
Courses
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