10/07/2026 updated
100 % available
Full-Stack Software Engineer | Cloud Architecture (AWS)
Barcelona, Spain
Only remote
Bachelor of Laws (LL.B.), Department of Law, School of Law, Meiji University, Tokyo, JapanAbout me
Full-stack software engineer with 8+ years of professional development experience specialising in Python/Django and Java/Spring Boot backends, React and Vue.js frontends, and AWS-based cloud architecture.
JavaScriptAmazon Elastic Compute CloudCloud EngineeringCode ReviewDevOpsDjangoLaravelPostgreSQLNode.jsScrum MethodologySoftware ArchitectureRuby On RailsNext.jsDocker for AWSTailwind
Backend Development (Python/Django & Java/Spring Boot)
Expert-level Python/Django development with mentoring capability, combined with Java/Spring Boot, PHP/Laravel, Node.js, Go, C#/.NET, and Ruby on Rails for robust backend solutions across enterprise and freelance projects.
Cloud Architecture & DevOps (AWS)
AWS Certified Solutions Architect with hands-on experience in EC2, ECS/Fargate, Step Functions, S3, VPC, and CloudFormation, complemented by Docker, Kubernetes, Jenkins, CI/CD pipelines, Prometheus, and Grafana for scalable cloud infrastructure.
Frontend Development (React/Next.js & Vue.js)
Proficiency in React/Next.js with shadcn/ui and Tailwind CSS, as well as Vue.js/Vuetify/BootstrapVue, TypeScript, and JavaScript, enabling full end-to-end delivery of modern, responsive web applications.
Database Management
Solid experience with PostgreSQL, MySQL, DynamoDB, and DB2, including schema design, data lifecycle management, and performance optimisation for large-scale enterprise applications.
Architecture Design & Technology Selection
End-to-end architecture design and technology selection for complex systems, including Kubernetes-based autoscaling, multi-environment Docker Compose setups, and RAG-based support systems for automotive enterprise clients.
Scrum & Technical Leadership
Experience as Scrum Master support and technical lead, owning client negotiation, system design, code review, and delivery management for teams of up to 10 engineers on Tier 1 supplier projects.
AI-Assisted Development
Practical use of AI-assisted development tools including Claude Code and GitHub Copilot to accelerate implementation, code review, and specification workflows.
Ecommerce Platform Development
Solo design and development of a full EU-Japan cross-border ecommerce platform using Next.js 16, React 19, TypeScript, Tailwind CSS 4, Prisma ORM, and PostgreSQL (Neon), deployed on Vercel with full purchase flow functionality.
RAG & NLP Systems
Direction and delivery of a Retrieval-Augmented Generation (RAG) support system using hybrid BM25 search with bilingual keyword scoring, N-gram tokenisation, and a GitHub Copilot CLI-based answer-generation pipeline.
Monitoring & Observability
Delivery of end-to-end monitoring platforms using Prometheus, Grafana, and Slurm Exporter (Go) for HPC cluster nodes, including automated backup/restore and per-pod active-handle monitoring.
Expert-level Python/Django development with mentoring capability, combined with Java/Spring Boot, PHP/Laravel, Node.js, Go, C#/.NET, and Ruby on Rails for robust backend solutions across enterprise and freelance projects.
Cloud Architecture & DevOps (AWS)
AWS Certified Solutions Architect with hands-on experience in EC2, ECS/Fargate, Step Functions, S3, VPC, and CloudFormation, complemented by Docker, Kubernetes, Jenkins, CI/CD pipelines, Prometheus, and Grafana for scalable cloud infrastructure.
Frontend Development (React/Next.js & Vue.js)
Proficiency in React/Next.js with shadcn/ui and Tailwind CSS, as well as Vue.js/Vuetify/BootstrapVue, TypeScript, and JavaScript, enabling full end-to-end delivery of modern, responsive web applications.
Database Management
Solid experience with PostgreSQL, MySQL, DynamoDB, and DB2, including schema design, data lifecycle management, and performance optimisation for large-scale enterprise applications.
Architecture Design & Technology Selection
End-to-end architecture design and technology selection for complex systems, including Kubernetes-based autoscaling, multi-environment Docker Compose setups, and RAG-based support systems for automotive enterprise clients.
Scrum & Technical Leadership
Experience as Scrum Master support and technical lead, owning client negotiation, system design, code review, and delivery management for teams of up to 10 engineers on Tier 1 supplier projects.
AI-Assisted Development
Practical use of AI-assisted development tools including Claude Code and GitHub Copilot to accelerate implementation, code review, and specification workflows.
Ecommerce Platform Development
Solo design and development of a full EU-Japan cross-border ecommerce platform using Next.js 16, React 19, TypeScript, Tailwind CSS 4, Prisma ORM, and PostgreSQL (Neon), deployed on Vercel with full purchase flow functionality.
RAG & NLP Systems
Direction and delivery of a Retrieval-Augmented Generation (RAG) support system using hybrid BM25 search with bilingual keyword scoring, N-gram tokenisation, and a GitHub Copilot CLI-based answer-generation pipeline.
Monitoring & Observability
Delivery of end-to-end monitoring platforms using Prometheus, Grafana, and Slurm Exporter (Go) for HPC cluster nodes, including automated backup/restore and per-pod active-handle monitoring.
Experience
Professional experience5 - 10 years
Freelancer since2021
Languages
EnglishFluentJapaneseNative speaker
Project history
Founded and incorporated a company to build and operate an ecommerce platform, with the explicit goal of using it to run a real cross-border EU-Japan ecommerce business. Solo development of the ec-next platform using Next.js, React, TypeScript, Tailwind CSS, shadcn/ui, Prisma ORM, and PostgreSQL (Neon), deployed on Vercel.
Operates as an independent contractor delivering full-stack development and AWS architecture for enterprise clients, primarily via Open Up Solutions Inc. for end-client Denso Corporation. Owns technology selection, system design, client negotiation and Scrum delivery, in addition to hands-on backend, frontend and infrastructure implementation. Projects include ODK Support Auto-Response System (RAG-based), Sensor Data Viewer for ADAS Development (GAUDIWebApp), Slurm Cluster Visualisation System, and Image Data Lifecycle Platform for ADAS (MILA).
Software structure change visualisation tool for embedded automotive software (Open Up Solutions) as backend lead. Tech stack: Python/Django REST Framework, PostgreSQL, Docker.