# Alvaro Bernar Silos > Lead Full Stack Software Engineer Location: San Francisco, California, United States Profile: https://flows.cv/alvaro T-shaped Software Engineer with 7+ years of experience in fast-paced environments, building complex large-scale web applications, Javascript/Typescript SDKs and UI component libraries. ## Work Experience ### Staff Software Engineer and CRM Team Lead @ Arketa Jan 2023 – Present | New York, United States - Launched the CRM suite with features designed to be multi-tenant and led the engineering team becoming the second revenue stream of the company. - Designed User Segments initially using bloom filters and later our data warehouse with more than 3M MAU's data. Its used by our partners to filter users based on behavior. - Led the CRM Automations (Workflows) feature from 0 to managing for than 7k events per second. - Implemented and later refactored the Broadcast's feature, making it ready to handle hundreds of thousands of emails per campaign. - POC on AI powered chatbot that responded to business related questions connected to our data warehouse ### Core Software Engineer (Typescript Full-Stack Developer) @ SlashAuth Jan 2022 – Jan 2023 | San Francisco Bay Area Company closed operations. Developer platform for web3 enabled apps that provides Auth (OpenID) functionality (on-chain authentication with non-custodial and managed wallets), role and token-gated based access control and data storage. - Coordinated the subscriptions project (with stakeholders, engineers and design), releasing in less than 1 week and getting first paying customers. - Launched an e2e Api testing framework using Node.js and Jest, achieving 95% of endpoints coverage to guarantee 99.95% uptime. - Reduced TTFHW from 15 to 1 minute, by creating a Sample App downloadable configured with app preferences. - Published a Typescript open source library with easy drop-in React components to reduce integration time. ### Founding Software Engineer (Typescript Full-Stack Developer) @ ProcessLabs.ai (YC W21) Jan 2022 – Jan 2022 | San Francisco Bay Area Company pivoted and closed operations. Conducted user interviews, defining the product roadmap, building and owning the MVP; a web application built with Node.js and React. - Designed a data abstraction layer using dependency injection and a multi- schema approach, preparing the product for both a multi-tenant Sass and on premise deployment. - Engineered a plugin system for data source integrations. Implemented the first change data capture (CDC) PostgreSQL approach using native triggers and stored procedures. - Released an SQL code editor with syntax highlighting and auto-completion, using CodeMirror and inserting integrated db schema data ### Senior Frontend Software Engineer @ Jobandtalent Jan 2020 – Jan 2022 | Remote Spanish unicorn with a $2B valuation, offering an on-demand staffing marketplace. - Designed and developed an internal React component library written in Typescript (with more than 40 components) and guided adoption across 6 applications owned by 8 teams. - Led an initiative of performance improvements in a Ruby on Rails and React app, from analysis using Datadog to implementation, reducing p75 and p90 endpoint metrics before a massive growth of ~2.5X after acquisitions. - Mentored and managed a team of 6 Jr and Mid frontend engineers, obtaining 2 promotions in a year. - Improved reliability of Scheduling App, by giving support in the frontend layer to solve bugs that were affecting thousands of job positions. ### Frontend Software Engineer @ CoverWallet Jan 2017 – Jan 2020 | NYC - Madrid Joined as the 9th engineer and left after the acquisition by Aon for 500M and a tech team of more than 100 engineers. - Accelerated revenue, reaching company hyper-growth (100%+ YoY) by building a multi-step form with React and Redux to generate insurance quotes as part of the Acquisition Team. - Polished a Ruby on Rails and React application as part of Customer Success and Retention teams reducing churn rate by ~45%. - Increased conversion of European market (product launched for Zurich Insurance Group) from 4% at launch to 15% through feature iteration in 6 months. - Improved site loading speed in 6 applications between 5 and 15% by reducing a Javascript shared library size ~70% using Webpack tree shaking and other techniques. - Conducted an internal workshop and tech talk about improving performance in React + Redux applications to around 80 engineers. ### Junior UI Developer @ Ideonomía - Agencia de Publicidad Jan 2015 – Jan 2017 | Madrid y alrededores, España Started as a Digital Marketing Analyst but quickly learned to code (self-taught). Liaised with clients such as JustEat, BlaBlaCar, TripAdvisor, Pandora, BBVA and Santander Bank. - Achieved 3x revenue increase by boosting development speed through the development of a custom CSS framework using PostCSS. - Monitored, optimized SEO and implemented web analytics tracking on different websites with +1M DAU. - Assembled 2 component libraries (different clients) using Javascript, React and CSSModules after conducting User Interface (UI) audits and establishing design systems, working together with a team of 3 designers. ### Digital Marketing Intern @ AVON Cosmetics - IMED Cluster Jan 2015 – Jan 2015 ### Assistant Marketing Manager @ La Nevera Roja Jan 2014 – Jan 2015 ### Assistant Business Manager @ Vinzeo (Hewlett-Packard) Jan 2014 – Jan 2014 ## Education ### Web Development Bootcamp Ironhack Jan 2017 – Jan 2017 ### SEO in SEM and Analytics Advanced Program ESIC Business & Marketing School Jan 2015 – Jan 2016 ## Contact & Social - LinkedIn: https://linkedin.com/in/alvaro-bernar-silos - Website: https://calendly.com/donbernar/30m --- Source: https://flows.cv/alvaro JSON Resume: https://flows.cv/alvaro/resume.json Last updated: 2026-03-22