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jjmountain
Software Engineer
Headline / Bio
Senior software engineer with experience coordinating and delivering projects across diverse industries
Tokyo, Japan
All Rounder
Experience
7 years
Work Location
Remote
Work Schedule
Part Time
Workload
20 Hrs/Wk
Business language
JP + EN
Approx. Hourly Rate

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jjmountain
Software Engineer
Badge
Portfolio
Skills
Top Skills

Python

TypeScript

Ruby on Rails

React.js

More Skills
Vue.js
GitHub
HTML
CSS
Node.js
GraphQL
HTML5
Git
Tailwind
Figma
Software Testing
PostgreSQL
UX Design
UI Design
Capabilities
People Management
Working in a Remote Team
Flexible Working Across Time Zones
Stakeholder Management
Presenting to Clients & Leadership
Startup Experience
International Experience
Experience
Past Clients
Dream Drive
Intercom
Kraken
Sollective
Industry experience
Automotive
Customer Support
Food & Beverages
Work History
Senior Software Engineer
Employee
Kraken Technologies Japan / Energy
May 2025 - Present1 year
Building customer integrations for major energy clients including Tokyo Gas and Octopus Energy Japan. Developing scalable APIs and data processing systems that handle millions of meter readings daily for Japan's energy market transformation. Collaborating with client teams to implement complex domain models for energy systems, supporting Kraken's expansion across international markets.
Skills: Python, Django, Project Planning, Project Management
Product Engineer
Employee
Intercom / Customer Support
Dec 2023 - Apr 20251 year 4 months
Key engineer in the AI Agent team, helped to develop and drive core features of the Product including Fin over Email, Personality, Real-time translation and a new AI Architecture for Fin, rated G2's number 1 AI Agent in Spring 2025.
Lead Full-Stack Developer
Employee
DreamDrive Campervans
As the lead full-stack developer at Dream Drive Campervans in Tokyo, I have played a crucial role in driving the success of this fast-growing startup. With a strong focus on delivering innovative solutions to meet the company's IT needs, I have acted as the lead architect, project manager, and developer for a range of in-house software applications.
Full-Stack Developer
Employee
Kingsdown Breads
As the full-stack developer at Kingsdown Breads in the UK, I was tasked with rapidly developing a complete end-to-end e-commerce solution for a family bakery business. I designed custom backend data models that perfectly fit the unique needs of a bakery, and successfully ran the site in production for one and a half years without significant incident. During that time, we took thousands of orders and received praise from customers for the ease of use of the site.
Languages

Japanese

Business

English

Native

Qualifications
Higher education
University of Southampton
Bachelors
Psychology
University of Lancaster
Masters
TESOL
Certifications & Honors
JLPT N2
Japan Foundation
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