Ailin Nakaganeku

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

1. Crombie, iLovePDF

   Software Engineer,|Oct 2025 – Present

   • Own the upload system end to end: files and folder trees up to 50 GB, built to survive unstable networks.
   • Architected a scalable upload path: browser-to-S3 multipart with presigned URLs and adaptive part sizing.
   • Shipped the product's core flows: PDF tools (compress, convert, OCR), bulk copy and delete, pagination, previews, and the paid-plan limits flow across frontend and backend.
   • Collaborated with the PHP backend team to define API contracts.
   • Set up frontend observability with Sentry and drive performance work from Lighthouse and profiler data.

2. Crombie, PUMA.com

   Frontend Engineer,|Sep 2024 – Oct 2025

   • Stabilized flaky Cypress E2E tests and contributed to automated accessibility testing, making the CI/CD pipeline reliable.
   • Built third-party integrations in a high-traffic production storefront: GA4 e-commerce events and Stylitics personalized recommendations.
   • Shipped PDP and checkout features and fixes in production: personalized recommendations, product content and the Klarna payment confirmation flow.
   • Maintained GitHub Actions CI for Storybook tests and contributed to the React 18 migration.

3. Crombie, Wpromote

   Frontend Developer,|Jul 2023 – Sep 2024

   • Built responsive, performance-focused sites for US brands, including The Second City.
   • Integrated headless CMS and e-commerce back-ends through APIs, keeping the experience consistent across desktop and mobile.
   • Delivered multiple client projects in parallel, balancing scope, timeline and quality under changing requirements.

4. Zenvia

   Frontend Engineer,|Oct 2021 – Jul 2023

   • Built features for Zenvia Conversion, a production SaaS sales inbox (WhatsApp, Instagram, Messenger), in React with Redux state management.
   • Contributed to the product redesign and rebrand, building reusable UI components with the internal design system and collaborating closely with design.
   • Integrated FullStory and Segment event tracking to analyze user flows, and resolved issues raised in NPS feedback.

5. Tag Latam - TA Group Holdings

   React Developer,|Apr 2021 – Sep 2021

   • Shipped a React Native iPad app for CVS Pharmacy that guided patients through health sessions with questions and vital-sign measurements, under HIPAA.

Frontend:

React, TypeScript, JavaScript, CSS / Sass, HTML, UI/UX, Responsive Design, Design Systems, Next.js, Redux

Cloud & DevOps:

Git, CI/CD, AWS, Docker, Google Cloud, GitHub Actions

Testing & Quality:

Performance, Accessibility (WCAG), Jest, Cypress, React Testing Library

APIs & Backend:

REST APIs, Node.js, GraphQL

AI:

LLMs, AI Agents (Function Calling, MCP), Prompt Engineering, Generative AI, Fine-Tuning (Hugging Face)

Observability & Analytics:

Sentry, Product Analytics (GA4, Segment, FullStory)

• Agents Course, | Hugging Face
• Introduction to LLMs in Python, | DataCamp
• Cloud Digital Leader, | Google Cloud
• Generative AI Practitioner, | AWS

• What Actually Happens When You Upload a File

  8 min read

  What building a 50 GB browser uploader taught me about chunking, resumable sessions, S3 multipart and presigned URLs.

Madrid, Spain