Yosuke Tanaka — Tech Lead

I turn ambiguous requirements into working systems, connecting discovery, cloud architecture, application delivery, and production operations.

日本語 · Profile website

About

As a Tech Lead, I join projects while requirements are still taking shape and work with stakeholders through architecture, implementation, and operations. I work across cloud infrastructure and applications, staying hands-on wherever the product needs it. Outside work, I have designed, built, and operated a novel and reading community since 2022. Running a long-lived service has given me practical experience beyond feature delivery, including incidents, cost, analytics, and continuous improvement. ## What Matters in My Work

Structure ambiguity

I work with consultants and users to clarify loosely defined needs through dialogue and prototypes, then turn them into buildable decisions.

Connect product delivery

I lead across cloud architecture, infrastructure, application development, and production rollout so decisions become working software.

Increase team velocity

I combine AI-assisted implementation and review with analytics, observability, and delivery foundations so designers and growing engineers can contribute.

Technologies I Work With Now

| Area | Technologies & themes | |---|---| | **AI × Product** | Vertex AI / Amazon Bedrock / Azure OpenAI / AI agents | | **Cloud Native** | Google Cloud / AWS / Azure / Cloudflare | | **Application** | Go / Python / TypeScript / Next.js | | **Platform & Delivery** | Terraform / Docker / GitHub Actions / Observability | [View all technologies used →](TECHNOLOGIES.en.md)

Selected Work

AI Agent Proof of Concept

Tech Lead · Python / Azure

Leading the design and validation of an AI agent, from shaping requirements to implementation with real operational use in mind.

Business Matching SaaS Launch

Tech Lead · Google Cloud / Cloudflare / Vertex AI / Go / Next.js

Leading across requirement discovery, cloud and application architecture, product development, and the operating model for launch.

Novel & Reading Service Re-architecture

Personal Product · Go / Next.js / Google Cloud / Terraform

Redesigned a Rails service that temporarily recorded roughly 14,000 page views in one month, using four years of operating experience to migrate it with AI-assisted engineering, quality controls, analytics, and observability while keeping it live.

[View the personal project →](projects/personal/) [View professional experience →](EXPERIENCE.en.md) ## Leadership ### Go far, together I focus on making the reasoning behind technical decisions visible so teams can act independently. While remaining hands-on, I bring designers and growing engineers into the process and close the gaps between requirements, architecture, and operations. I use AI for implementation and research, but I do not accept its output as-is. I take responsibility for checking whether it serves the goal and for validating the code, tests, security, and production operation. ## Credentials & Writing ### Certifications - Registered Product Owner — Scrum Inc. (2026) - AWS Certified Solutions Architect – Associate - AWS Certified Developer – Associate - JDLA Deep Learning for GENERAL ### Interviews & Articles

careers.lt-s.jp

“If you want to go far, go together” — a team-oriented engineering path

On continuous learning and supporting each team member’s growth.

clover.lt-s.jp

From discovery to delivery — AWS and application development at LTS

How we work across upstream planning, implementation, and production operations.

good-companies.jp

Sharing a richer and more enjoyable working life at LTS

An interview about work, career ownership, and growing with colleagues at LTS.

note.com

editch interview #1

Looking back on entering a portfolio competition and what changed afterward.