David Garcia Tort

Computer Engineer

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+81 70-4225-9780
degete@outlook.com
https://degete.cat
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Summary

Computer engineer with a BSc + MSc in Computer Engineering from the Autonomous University of Barcelona. Brings broad experience across web and mobile development, platform and infrastructure engineering, and end-to-end project delivery using modern, production-ready technologies.

Completed a MSc in Computer Science at Seoul National University in Seoul (South Korea), one of the most prestigious universities in Asia, through an exchange program. Later, moved to Taichung (Taiwan), where learned Chinese while gained valuable experience working in a startup environment at Rhinoshield, a globally recognized startup known for high-quality phone cases and screen protectors.

Currently based in Tokyo (Japan), working as a full-stack, iOS and infrastructure developer focused on cutting-edge AI technologies. Part of DoorDash | Wolt, a market-leading online delivery platform connecting consumers with local and online merchants through on-demand, retail and grocery services.

Work Experience

DoorDash | Wolt

Senior Software Engineer
April 2024 - Present Tokyo, Japan
Storefront: white-label ordering platform enabling merchants control over branding and sales
  • Architected and shipped a Kotlin/Ktor REST service on MongoDB, supporting 500+ merchants
  • Designed service shared Protobuf gRPC contracts that standardized communication across 10+ microservices
  • Implemented scoped service-to-service token authentication, hardening the security boundary between internal services
  • Integrated hCaptcha Enterprise into high-risk flows to reduce fraudulent SMS abuse and account takeover attempts by 95%
  • Established Ktlint/Detekt static-analysis standards, improving code consistency and reducing review churn team-wide
  • Provisioned AWS infrastructure with Terraform and Helm, and automated CI/CD with GitHub Actions
  • Built Datadog observability dashboard with custom metrics and alerts, reducing incident detection time by ~80%
  • Drove cross-team alignment on scope and dependencies, unblocking delivery of new projects and features
  • Authored RFCs with engineering, product, and design stakeholders to align technical direction on across major initiatives
  • Led team's evaluation and adoption of LLM tools (Cursor, Claude, Copilot, Codex...), shaping engineering workflow standards
  • Embedded AI agents into engineering workflows, accelerating delivery throughput by an estimated ~30%

Paidy

Senior Software Engineer
November 2021 - March 2024 Tokyo, Japan
Consumers API: Authentication, Authorization & Identity Management and GraphQL API
  • Built a high-throughput Rust/Actix API on PostgreSQL and Redis, serving 1,500+ rps at p99 of 2ms
  • Developed and managed a GraphQL layer that reduced average -client requests by 90%, reducing payload and latency
  • Led a zero-downtime migration to an in-house based JWT authentication from AWS Cognito for 10M+ active users
  • Integrated reCAPTCHA Enterprise into authentication flows to reduce fraudulent SMS and account takeover attempts by 95%
  • Provisioned a AWS ECS infrastructure with Terraform, and automated CI/CD with CircleCI
  • Introduced autoscaling and Spot Instances, reducing infrastructure costs by 80%
  • Cut CI/CD costs by ~80% through optimized Rust linting, parallelized builds, and targeted test caching
  • Accelerated build times by ~60% via incremental compilation and dependency caching, improving developer feedback loops
  • Reduced onboarding time from 7+ days to ~2 days by delivering a dockerized VSCode development environment

NABLAS

Senior Software Engineer
December 2019 - November 2021 Tokyo, Japan
PyGrade: e-learning platform to improve Python skills
  • Delivered a Django REST API and Vue SPA for a platform serving 10,000+ learners
  • Integrated a WebAssembly-based in-browser Python runtime using Pyodide, eliminating server execution costs by 99%
  • Provisioned and managed GKE Kubernetes infrastructure with Terraform
  • Automated CI/CD deployments with GitHub Actions
iLect: e-learning computing service platform for AI researchers and engineers
  • Built and maintained a Flask API and Vue SPA serving 500+ researchers and engineers, plus +200 students per session
  • Provisioned a production GKE Kubernetes cluster with Terraform, sustaining 99.9% uptime
  • Managed an HPC cluster across CPU and CUDA-enabled GPU nodes with JupyterLab, supporting 100+ concurrent workloads
  • Automated GKE deployments with GitHub Actions
  • Maintained CUDA-enabled Docker images with JupyterLab and VNC, keeping the ML toolchain cutting-edge updated
HPC: in-house high performance computing cluster
  • Managed an HPC cluster of NVIDIA DGX Stations with Ansible, codifying provisioning for scalability and reproducibility
  • Administered a JupyterHub server on Docker Swarm, enabling 50+ concurrent notebook sessions for the research team
  • Maintained JupyterHub Docker images for PyTorch, TensorFlow, and related ML frameworks, standardizing the team environment

Innovatech Studio

iOS Developer
November 2018 - December 2019 Tokyo, Japan
Hapilk: in-house iOS health app to encourage employees to do exercise
  • Built HealthKit integration to retrieve and process real-time health metrics for 25.000+ employees
  • Leveraged GCD (DispatchQueue/DispatchGroup) for concurrent data processing, keeping the UI responsive under load
  • Stabilized dependency management with CocoaPods and Carthage, preventing dependency build inconsistencies
  • Integrated a JWT-authenticated REST API with Moya and Alamofire for secure client-server communication
  • Adopted Codable and SwiftyJSON for robust, type-safe API parsing, reducing runtime decoding errors
  • Enforced SwiftLint across the codebase, improving consistency and reducing review overhead
  • Automated builds and test execution with CircleCI, shortening the feedback loop
  • Automated App Store releases with Fastlane, cutting manual deployment effort to near zero
  • Built interactive health dashboard visualizations using the Charts framework to improve user engagement
  • Integrated Crashlytics for real-time crash reporting, accelerating issue identification and resolution time
Logijob: SAAS recruitment platform specialized for a logistic companies
  • Delivered a Laravel REST API and Vue SPA for a logistics recruitment platform
  • Built a feature-rich admin panel with Laravel Nova, accelerating internal operations
  • Drove PHPUnit unit testing and automated code coverage in CI/CD on CircleCI, raising release confidence
  • Containerized the application with Docker and deployed to Amazon ECS for scalable delivery

Rhinoshield

Full Stack & DevOps Developer
September 2016 - September 2018 Taichung, Taiwan
Boltics Core: e-commerce management service with Shopify integration
  • Built a real-time Laravel backend integrating Shopify API to sync orders and inventory, processing 50,000+ orders daily
  • Drove project delivery with JIRA Kanban, coordinating scope and priorities across the team
  • Automated the CI/CD deployment pipeline with Bitbucket Pipelines for reliable releases
  • Deployed and horizontally scaled the application on Amazon EC2 behind an Elastic Load Balancer
  • Configured Amazon CloudWatch observability for proactive monitoring and alerting
MassFulfill: automated fulfillment app published on the Shopify App Store
  • Deployed and hardened a production Ubuntu Server with NGINX on Amazon EC2
  • Implemented team billing and subscription management with Laravel Spark, enabling recurring revenue
  • Built event-driven order sync across Shopify stores using webhooks and Amazon SQS, ensuring reliable at-scale processing
Shipping system: in-house automated shipping system for processing orders
  • Developed a Laravel API with concurrent multi-order processing, increasing fulfillment throughput and reducing human errors
  • Delivered an intuitive Vue and Bootstrap SPA with real-time order status updates, improving operational visibility

WSI

Full Stack Web Developer
December 2015 - August 2016 Taichung, Taiwan
EasyBank: p2p lending platform
  • Developed a Node and Express API service backing the platform
  • Implemented stateless JWT authentication to securely manage user sessions
  • Built a responsive Angular and Bootstrap SPA for a seamless cross-device experience
  • Deployed the application on Amazon EC2 using Amazon Linux images with NGINX and PM2 for process management
  • Shipped a hybrid Android and iOS app with Ionic from a single codebase, accelerating time to market

9CIRCLE

Web Developer & Graphic Designer
September 2014 - November 2015 Taichung, Taiwan
9CIRCLE Int: company's official website
  • Built an online product catalogue with WordPress and WooCommerce, establishing the company web presence
Marketing: company's official brand identity and guidelines
  • Designed brand, business cards, advertisements, product packaging and collateral materials with Photoshop and Illustrator
  • Designed a full-printed multilingual product catalogue in InDesign to support the global sales effort
  • Designed and planned exhibition booths for international trade shows in Las Vegas and Buenos Aires
  • Represented the company as a sales representative at international trade exhibitions
Education

Seoul National University

Exchange program in Computer Science and Engineering
September 2013 - June 2014 Seoul, South Korea
Final project: mobile web app to check the restaurant's menus around the campus
  • Real-time user location using the browser geolocation API
  • Parse and normalize menus information from the restaurant's official websites
  • Responsive design using jQuery Mobile

Autonomous University of Barcelona

BSc + MSc in Computer Engineering
September 2009 - June 2014 Barcelona, Catalonia
Activities and societies: President of Microsoft DotNetClub Z2 Club
  • Led the club, organizing technical workshops and events for the engineering student community
Skills
Languages
NativeCatalan, Spanish
ProficientEnglish
IntermediateChinese, Japanese
Technologies
LanguagesGo, Java, Javascript, Kotlin, PHP, Python, Rust, Swift, TypeScript
FrameworksDJango, Ktor, Laravel, Nuxt, React, Tailwind, Vue
DatabasesMariaDB, MongoDB, PostgreSQL, Redis, SQLite
InfrastructureAnsible, AWS, Datadog, Docker, GCP, Grafana, Kafka, Kubernetes, Nginx, Prometheus, Terraform
MobileAndroid, iOS, Jetpack Compose, SwiftUI
TerminalBash, Neovim, Tmux, Vim, Zsh
AIClaude, Codex, GitHub Copilot, OpenAI