Description

・10 years experience building web applications end-to-end (React/Next.js + TypeScript + Hono/Nestjs) with strong experience in system architecture, prioritizing software lifecycle management, contributing to system performance and continuous deployment to deliver secure application delivery.

・Experienced project manager. Proactive, can work independently on projects or collaborate with a team and has experience working in startups to big tech companies, fast-paced environments with international co-workers.

・Provides technical leadership, lead team and optimized system performance across multiple teams.

・Problem solving mindset - I love solving problems with programming, and I've released several products with side hassle. (e.g miniparis.net)

Languages

English
Native or bilingual

Workplace preferences

Can work on-site

Barcelona (up to 20km)

Travel Agency Support SaaS Company [Freelance]
Full Stack Developer
January 2025 - March 2026 (1 year and 2 months)
・Tech: Next.js v16, shadcn/ui, Hono, Prisma, Jest, Vitest, OpenAPI
・Joined a project already running 2–3 months behind schedule and helped reduce the delay to just 2 weeks. Contributed by improving prioritization, coordinating work across multiple repositories, optimizing ticket management and implementing an auto-generated type definition workflow between backend and frontend. Also supported junior and newly graduated developers to improve overall team effectiveness.
・Reduced initial page rendering time from 4–5 seconds to 2 seconds for a BtoC web application handling 8–10 MB of data.
・Standardized and structured CSS to support pixel-perfect implementation.
・Organized project resources, clarified requirements and business flows and prioritized tasks effectively.
・Received recognitions from the director of the business department contributed to securing the budget for the next development phase.
Next.js React.js Hono Prisma OpenAPI
BI & ETL SaaS Provide Company [Freelance]
Lead Frontend developer
October 2023 - December 2024 (1 year and 2 months)
・Next.js v12 (page router), MUI, NestJS v9, GCP, Digdag(Pipeline).
・Visualized roadmap, build development environment, implementation, and reviews.
・Optimized a performance-critical SQL process, reducing computational complexity from O(n²) to O(n).
・Improved end-to-end performance for handling large datasets (50MB+) across backend and frontend. Resolved CSV download bottlenecks by optimizing SQL query evaluation and execution timing, meeting the business requirement of a 30-second timeout.
Next.js NestJs Sequelize trino digdag
Ad-tech Admin SaaS Company [Freelance]
Full-stack: Frontend-heavy
April 2022 - September 2023 (1 year and 5 months)
・Designed authentication/authorization and delivered FE/BE features while
・Refactoring during a replacement project.
・Replaced and implemented SPA frontend to SSR on a Node server using the React.js native API for SEO requirements from scratch.
React.js .NET