Ailin Nakaganeku

Ailin is a Software Engineer based in Madrid, Spain, who takes ownership of problems end to end and ships product. She approaches every engineering decision like a product decision, pairing technical depth with the judgment to know what to build, how to build it, and when to push back.

1. Crombie

   Frontend Engineer, iLovePDF,|Oct 2025 – Present

   Owned frontend decisions for a file management SaaS across 4 product versions. Designed the upload system: 50 GB files and nested folder trees uploaded direct-to-S3 via multipart, built to survive unstable networks with stall detection, retries with recovery cycles, and automatic pause and resume when the connection drops. Developed PDF processing workflows, bulk operations, and optimistic UI updates.

2. Crombie

   Frontend Engineer, PUMA.com,|Sep 2024 – Oct 2025

   Drove platform improvements for PUMA.com, improving the user experience at scale. Shipped a React 18 upgrade improving page performance, WCAG accessibility expanding product reach, and GA4 event tracking giving the team real data to drive better product decisions. Accelerated team shipping speed with 17% faster CI/CD builds and 8% less deployment risk.

3. Crombie

   Frontend Developer, Wpromote,|Jul 2023 – Sep 2024

   Shipped cross-platform web experiences with CMS and e-commerce integrations, keeping the user experience consistent across desktop and mobile. Managed multiple concurrent client projects, balancing scope, timeline, and quality across constantly evolving requirements.

4. Zenvia

   Frontend Engineer,|Oct 2021 – Jul 2023

   Contributed to a company-wide product redesign, building design system components that standardized the UI across all user-facing features. Integrated Segment and FullStory analytics to pinpoint user friction points, driving UX improvements that moved the NPS needle.

5. Tag Latam - TA Group Holdings

   React Developer,|Apr 2021 – Sept 2021

   Delivered a React Native iPad product for CVS Pharmacy under HIPAA compliance requirements, improving the in-store experience and day-to-day operations.

Frontend

TypeScript, React, Next.js, Tailwind CSS, Redux Toolkit

Backend

Node.js, Express.js, Nginx, REST APIs, GraphQL

Cloud & DevOps

AWS, Google Cloud (GCP), Docker, GitHub Actions, CI/CD

Databases

PostgreSQL, MongoDB, Prisma

Testing

Cypress, Jest, React Testing Library

Tools

Git, Figma, Postman

• Hugging Face: Agents Course
• DataCamp: Introduction to LLMs in Python
• GCP: Google Cloud Digital Leader
• AWS: Generative AI Practitioner
• Kaggle: 5-Day Gen AI Intensive Course
• EF Set: Official English Certificate C2 Proficient
• IBM: Generative AI Prompt Engineering
• Mastercard: Dynamic Yield Technical Certification
• Meta: Principles of UX/UI Design

• What Actually Happens When You Upload a File

  12 min read

  Ever wondered what goes on behind the scenes when you click that upload button? From chunked transfers to parallel processing, here is how the world's largest cloud platforms handle billions of file uploads every day.

Madrid, Spain