Looking for a job

Elias Castro

@eliascastro

Message

I design AI-powered B2B and B2C products that improve conversion and retention.

Spain

Message

What I'm looking for

I'm open to Senior or Staff Product Designer roles, remotely across the EU or globally, where I can own product work end-to-end, collaborate closely with engineering, and use research, data, and AI-assisted prototyping to improve customer outcomes.

At Drops, a Kahoot! company, I lead AI-powered learning features for 35M+ users across iOS, Android, and web. I own discovery through delivery, shipping monetization and retention loops with product and engineering.

I improved day-7 retention by 18% through A/B experimentation and behavioral analytics, and cut design-to-prototype cycles by 40% using LLM-assisted workflows. Previously at The Knot Worldwide, I lifted vendor funnel conversion by 23% and reduced onboarding drop-off by 18% for WeddingWire's B2B marketplace.

I've also designed AI customer-management features, analytics dashboards, call-distribution tools, and scalable design systems for companies including Aircall, MeetFrank, Tendam, and Bloobirds. I lead with research, ship with data, and use AI-assisted prototyping to validate ideas faster alongside engineering.

Experience

Work history, roles, and key accomplishments

Current

Senior Product Designer

Current

Drops (a Kahoot! company)

Jun 2024 - Present (2 years 3 months)

Led AI-powered learning features for 35M+ users across iOS, Android, and web, owning discovery through delivery. Improved day-7 retention by 18% through A/B experimentation and cut design-to-prototype cycles by 40% with LLM-assisted workflows.

AI A B Testing Behavioral Analytics iOS Android Web Product Design LLM Prototyping

Senior Product Designer

The Knot Worldwide

Jul 2023 - Jun 2024 (11 months)

Owned UX for WeddingWire's B2B vendor marketplace with 500K+ customers, driving end-to-end design. Lifted vendor funnel conversion by 23% through UX audits and A/B testing, and reduced onboarding drop-off by 18% after 40+ research sessions.

UX Design A B Testing User Research Web Mobile Product Design Growth experimentation

Senior Product Designer

Aircall

Sep 2022 - Jun 2023 (9 months)

Owned end-to-end design of an AI customer management feature and node-based call-distribution builder for 13,000+ B2B customers. Redesigned data-heavy analytics dashboards, cutting time-to-insight and reducing configuration errors by 35%.

AI Product Design Design Systems Analytics Dashboards B2B Web Mobile engineering collaboration

Lead Product Designer

MeetFrank

May 2022 - Aug 2022 (3 months)

Designed B2B and C-suite UX flows, validated 3 business hypotheses through rapid discovery sprints, and refreshed design system foundations within an 8-week engagement.

UX Design Discovery Sprints Design Systems B2B Prototyping

Product Designer

Tendam

Apr 2021 - May 2022 (1 year 1 month)

Scaled design systems across 5 fashion brands, optimizing web and mobile components in Figma and managing delivery via agile/Jira.

Design Systems Figma Agile Jira Web Mobile

UI Designer

Bloobirds

Apr 2020 - Apr 2021 (1 year)

Built a B2B SaaS design system from scratch in Figma, including components, user flows, modals, and sales funnels, improving design workflow consistency across the product.

Design Systems Figma B2B SaaS User Flows Sales Funnels

UI Designer

Manhattan Home Design

Dec 2018 - Mar 2020 (1 year 3 months)

Enhanced web and mobile e-commerce UX for an international remote team, improving product discovery and checkout flows using Figma and Jira Kanban.

Ecommerce UX Figma Jira Web Mobile Product Discovery Checkout Flow

Graphic Designer

PALM ERA

Oct 2017 - Dec 2018 (1 year 2 months)

Created advertising campaigns for Renault, UNICEF, Daikin, and C&W at a marketing agency in Caracas, building a foundation in visual communication, brand systems, and production.

Advertising visual communication Brand System Production

Education

Degrees, certifications, and relevant coursework

Ironhack

Bootcamp, UX/UI Design

Activities and societies: Final project selected Top 3 in class, Top 10 academy-wide.

Completed a UX/UI Design Bootcamp in 2020, covering design thinking, lean UX, prototyping, and component-based design systems. Final project selected Top 3 in class and Top 10 academy-wide.