Teppei Suyama

90 % Regression testing cut Replaced manual test cycles with automated C# unit tests 60 % Overtime reduced VBA automation tools lifted the load across the whole team 40 h / mo RPA savings Fully automated sales operations with Power Automate 15.45 % Search CTR Personal site SEO improvements reached ~3x the industry average (78 clicks in 25 days)

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Strengths

Drive from problem discovery to execution

I spot inefficiencies in day-to-day operations and ship fixes with VBA or Power Automate. Results include 60% less overtime and 40 person-hours/month saved with full RPA.

Full-stack skills from requirements to production

I cover the full cycle: requirements, design, backend, frontend, test automation, and operations. Certifications include Japan's Applied Information Technology Engineer, Java Gold, and LPIC.

Business outcomes through trust

I build alignment with stakeholders and turn it into business outcomes — 4× project-scale expansion at one engagement. On this self-operated portfolio I have also lifted search CTR to 15.45% (~3x industry average) through SEO improvements.

Products

Products I build on the side

Not accepting new users

YumeHashi — Turn Dreams Into Daily Action

With a dream, even the largest wall can be crossed.

YumeHashi turns dreams into daily action via three steps (write, break, keep going) plus 12-constellation gamification. Built on Flutter Web. Signups paused.

DreamsGoal ManagementGamificationFlutter

Defrago — A GTD App to Defragment Your Mind

The simplicity of taking the shortest path to the goal.

Defrago defragments your mind: capture into Inbox, classify with 4 buttons, then engage and review without hesitation. Essentialism redesign v2.0.0.

GTDTask ManagementProductivityPython

In development — stay tuned

Tasukiba — PM Platform Connecting Knowledge

The more you run it, the better the next one goes. Project management that connects knowledge.

Tasukiba passes knowledge between projects like a baton. WBS, risks, and retrospectives all connect with knowledge at the center. Built on Next.js + PostgreSQL.

Project ManagementKnowledge ManagementBusiness SoftwareNext.js