Career

Come build whatisn’t here yet.

Select is being built as a zaibatsu: a group of businesses meant to last three hundred years, in software and wherever else the future is missing something.

Everything below is one company — products, media and research, trading — and people move between them more than a company of this shape usually allows.

We are looking for exceptional people: outsized ambition, and the speed to build faster than anyone thinks possible.

See the businesses

01What we look for

The same bar,everywhere.

Whichever business you join, and whichever way you join it, these are what we read an application for.

01You have actually built something.
02You can say exactly which part of it was yours.
03You move from problem to result without waiting to be told.
04AI is already part of how you make and build, every day.
05You care about the last ten percent.
06You can explain why you fit this particular business.
07You are clear about what you want to have done.

02How you join

From founding memberto intern.

Each role is set at one of these, according to experience and how much of the business it carries. Say which one you are looking for.

Internship
Contract
Long-term project member
Business lead track
Founding member track

03Businesses

Ten businesses.One company.

Open one to read what it is, the roles it is hiring for, and what you would own inside it.

Product

ShogunAI

A personal AGI that remembers your work, understands your context, and finishes real tasks across your tools.

Not a chat assistant. ShogunAI combines a private memory formed from your day-to-day work with an execution layer that actually moves that work forward.

It reads the information scattered across mail, meetings, documents and calendars as one context, then recalls what is needed, writes, and carries tasks out. Anything consequential — sending something outside, for instance — is designed to require your approval.

Open roles

Founding Product Designer
Design Engineer
AI / Software Engineer
Product Engineer
AI Memory / Context Engineer
Security / Privacy Engineer
Product Manager
Content Marketer
Growth Marketer
Motion Designer
Launch Video Producer

What you would own

Designing what a personal AGI feels like to use
Building memory, retrieval, context and task execution
Interfaces that hold autonomy and human approval together
An architecture that starts from privacy and security
Making the difference between an AI that answers and an AI that finishes the work

Apply to this business

HonmaruAI

TikTok for work — knowledge and results shared short, and shown rather than written.

A work platform for publishing and finding the knowledge, progress, results and know-how scattered inside and around a company, as short pieces of content.

A feed built for work, so that understanding something no longer depends on a long document or a meeting.

Open roles

Product Designer
Design Engineer
Full-stack Engineer
AI / Recommendation Engineer
Product Manager
Content Strategist
Community Manager
Growth Marketer

What you would own

Designing short-form content made for work
Creation, posting and discovery
Summarisation, conversion, recommendation and search
Making internal knowledge circulate without anyone being asked
Forming the first community of users

Apply to this business

AgentPass

1Password for AI agents.

Security infrastructure for the moment an AI agent reaches for an external service, a credential, an API or your data.

Secrets are never handed to the model. What it may do, to what, for how long and within which scope is constrained — and approval, revocation and audit are part of the design.

Open roles

Security Engineer
Platform / Backend Engineer
Developer Tools Engineer
Native App Engineer
Infrastructure Engineer
Product Designer
Design Engineer
Developer Relations
Technical Content Marketer

What you would own

Authentication and authorisation for AI agents
Execution that never passes a secret to the model
Approval, expiry, revocation and audit logs
CLI, SDK, console and native apps
Documentation and the content that gets it adopted

Apply to this business

AI character chat

Next-generation AI entertainment, where characters, story and community are one product.

People talk with AI characters, build a relationship with them, and live inside a story and a world.

Character creation, conversation quality, retention, user-generated content, community and how it spreads on social are treated as one business, not as separate problems.

Open roles

Business Lead
Product Manager
LLM / Conversation Engineer
Full-stack Engineer
Character Designer
Narrative Designer
Product Designer
Community Manager
Creator Partnerships
Growth Marketer

What you would own

Designing a relationship that lasts past the first conversation
Conversation quality, memory and emotional range
Tools for making characters and stories
Building the creator and player community
Growth through TikTok, X and Instagram

Apply to this business

Dynamic UI

An AI-native interface generated and reshaped around what the person is trying to do.

Not fixed screens and forms. The information, the controls and the composition of the screen itself are generated and change with the goal in front of them.

Rather than shutting everything inside a chat window, it puts AI and direct visual manipulation in the same place.

Open roles

Founding Design Engineer
Product Designer
Generative UI Engineer
Frontend Engineer
AI / Agent Engineer
HCI Researcher
Product Manager
Creative Technologist

What you would own

Designing an interface that generates and changes itself
Turning model output into something you can operate
Interfaces for uncertainty, confirmation, correction and undo
Holding a design system and generated UI together
Researching and shipping a new interaction model

Apply to this business

Mobile AI Keyboard

A keyboard that puts AI inside everyday typing, rather than inside another app.

Starting from the app you already have open and what you are already writing, it helps you draft, reply, summarise, translate, convert and get through routine work.

You do not leave for another app to use AI. AI is in the typing itself.

Open roles

iOS / Swift Engineer
Keyboard Extension Engineer
On-device ML Engineer
AI / LLM Engineer
Mobile Product Designer
Design Engineer
Product Manager
Mobile Growth Marketer

What you would own

A keyboard that is fast and never in the way
Writing, replying, converting and translating
Deciding what runs on device and what does not
Privacy, and protecting what people type
A mobile experience people keep using daily

Apply to this business

RPGLLM

A personal fictional social network where AI characters go on changing their relationships while you are away.

A social RPG you can start by reading. No long prompt, no scenario to write: you scroll the timeline, post something short, message whoever interests you — and from that small intervention several characters answer according to their own personality, relationships and memory, until rumour, conflict, romance, reputation and incident have followed.

The bet is not to make people write stories. It is to turn a small social action into a story they want the next chapter of. What wins is not the cleverness of the model but the density of an ensemble reacting: one post, three or more characters answering from different interests, and the consequence still there tomorrow.

Open roles

Product Director
Product Design Engineer
AI / Backend Engineer
Business Owner Intern

What you would own

One action, many consequences: an immediate reaction, a social one, a change of state, and a hook for next time
A relationship graph and a memory ledger — who knows what, who has it wrong, what is still secret
Recall the player can see: the world visibly remembering the post they made days ago
Reading tempo, legible consequences and the next unresolved tension, held in the interface
Original worlds with a social structure and a grammar of drama, owned rather than borrowed from an existing fandom
Quality against cost, latency and safety — a young audience makes all three product requirements, not infrastructure ones
Turning a generated scene into something worth sharing, and that share back into the next player

Apply to this business

Consulting

AI Strategy Research Institute

Consulting in Japan: AI transformation for Japanese companies, from strategy through to what actually runs.

A strategic AI transformation partner, helping Japanese companies redesign operations, organisations and growth around AI.

Underneath that sits continuous research: AI technology, companies, products, startups, investment and market movement, in Japan and abroad. Not reprinted news — original research, comparison, data and interviews, turned into reports, articles, databases and events a company can actually decide with.

Open roles

Research Director
AI Researcher
Industry Analyst
Technology Writer
Editor
Data Journalist
Content Marketing Intern
Research Engineer
Data Product Engineer
Event / Community Manager

What you would own

Redesigning how Japanese companies operate, organise and grow around AI
Researching AI companies, technology and markets
Original reports, comparisons and industry maps
Interviewing researchers, founders and operators
Building the database of AI companies and products
Newsletter, social and events
Turning the research into products and businesses

Apply to this business

Media

Daikanyama Capital

A media and app studio that turns a technology publication into new products.

A technology publication covering AI, startups, product, finance and culture — and, from what its readers struggle with and respond to, a continuous line of small products and apps.

Not a magazine. Research, editing, community and product development connected into one business.

Open roles

Editor in Chief
Content Strategist
Technology Writer
Researcher
Content Marketing Intern
Newsletter / Social Editor
Product Manager
Full-stack Engineer
AI Automation Engineer
Community Manager

What you would own

Technology writing nobody else is doing
Researching what is happening abroad, edited for Japan
Newsletter, social and video
Building the readership into a community
Small products that start from a reader's problem

Apply to this business

Finance and trading

Kamogawa Trading

Research, strategy, execution and risk, redesigned AI-native.

A hedge fund and a fast, quantitative trading system built on AI agents, machine learning and an automated research base.

Not only the predictive model: data acquisition, hypothesis generation, backtesting, execution, risk management and audit are all in scope.

Open roles

Quantitative Researcher
ML / AI Researcher
Trading Systems Engineer
Low-latency Engineer
Data Engineer
Alternative Data Researcher
Risk Engineer
Portfolio Researcher

What you would own

Collecting and analysing market and alternative data
Hypothesis generation and strategy search with AI
A backtesting base you can reproduce
Execution and low-latency infrastructure
Risk management, monitoring and audit

Apply to this business

Across every business

Roles that work across the whole company rather than inside one business.

These sit above the businesses: the same person works on several of them, and carries the standard between them.

Open roles

SNS Growth & UGC Marketing Producer
Content Marketing Intern
Product Designer
Design Engineer
Motion Designer
Video Producer
Growth Marketer
AI / Software Engineer
Product / Business Lead

What you would own

Content Marketing Intern — X, TikTok, Instagram, Threads and Reddit; articles, interviews and case studies; short video, images and diagrams; competitor and trend research; measuring what turned into sign-ups; automating the content pipeline with AI
Product Designer — concept, UI/UX, design system and brand for a business
Design Engineer — design and frontend as one job, down to the last detail
Motion Designer — UI motion, micro-interactions and launch films
Video Producer — a product film from the idea through generative AI to the edit and the post
Growth Marketer — social, paid, community, creators and going abroad
AI / Software Engineer — the AI, agents, backend, frontend and data infrastructure several businesses share
Product / Business Lead — strategy, users, roadmap, KPIs and the team, from launch to growth

Apply to this business

SNS Growth & UGC Marketing Producer

Grow Select's AI businesses in Japan and abroad through short video, creators and paid — from the idea to the edit to the numbers.

A marketing role across several of Select's AI businesses, in the Japanese market and the global one. TikTok, Instagram Reels, YouTube Shorts, X and Reddit: planning, shooting, editing, posting, working with creators, running paid, reading what came back, and going again.

This is not social media management. It is content and advertising used to grow a business.

Which businesses you take is decided by fit and interest, from the ten above.

What you would do

Social strategy for TikTok, Instagram, YouTube Shorts, X and Reddit
Per business: content planning, scripts, shooting, editing, posting
Improving the hook, the structure, the captions and the thumbnail of a short
Planning, generating, collecting and analysing user-generated content
Finding, approaching and casting influencers and creators
Directing creators and outside production teams
Running TikTok, Meta and YouTube advertising
Planning ad creative, trafficking it, and A/B testing it
Reading post and ad data, and turning it into the next change
Owning CPA, CPI, CTR, CVR, ROAS and retention as numbers, not reports
Content made for Japan
Content and paid designed in Japan to land on users abroad
The path from a post to a download, a sign-up, a purchase, a community
Testing new platform features, ad formats and AI marketing methods

What you need

A real understanding of TikTok, Instagram, YouTube and X
You have planned content yourself, and made or run it
You look at the numbers, form a hypothesis, and keep changing things
You move quickly and on your own initiative
You can plan, write and work in Japanese
You use AI tools to make and analyse faster than you otherwise would

What helps

Running an account on TikTok, Instagram or YouTube
Running social or web advertising
UGC and influencer marketing
Video editing, motion design, copywriting
Google Analytics, ad consoles, Looker Studio
Making content and working in English
Marketing an app, a web service or an AI product
An agency, a production company, a media company or a startup

Follower counts and where you studied are not the qualification. What matters is what you thought, what you made, and what came of it.

Why this job

Several AI businesses, not one brand
The whole line: planning, production, distribution, analysis, improvement
TikTok Shop, live commerce and UGC as things you actually get to run
Built for a global audience from Japan, not only for Japan
AI tools, so a small number of people can produce an unreasonable amount
Judged on what you have made and what it did, not on age or title
Your plan becomes the product's growth, directly

How we judge it

Craft: The quality of the content and the creative.
Execution: How fast what you thought of becomes something real.
Ownership: Carrying the result to the end, not the task.
Growth thinking: Reading the numbers and improving on them, continuously.
AI native: Using AI to raise both the output and the speed.
Ambition: The intent to take something from Japan to the world.

Send us

Links to content, accounts, ads or projects you made or ran
Which part of each was yours
The result, in numbers you can explain
Why you fit this role in particular
What you want to have done at Select
The AI, production and analytics tools you can use

Finished work is not the only thing worth sending. Plans, performance reports, and a before-and-after of something you improved are all welcome.

Engagement

Internship
Contract
Professional contract

The title that goes with it — social lead, marketing producer, head of growth — follows from experience and what you have done.

Apply for this role

04Apply

One form,every business.

Say which business you want to be in and which role you are after, then send what you have made and why you fit that one in particular. That is the whole application.

Open the application form

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