01
Get to the
Root.
Is it fundamental? Don't suppress the symptom —
change it from the root.
00Careers
Infrastructure is
like air.
So obvious it becomes invisible.
Stop it, and everything stops.
That is what we are building.
01The Moment
Why now.
Waste is no longer an environmental issue.
It is a question of economic security.
Resource nationalism is rising worldwide.
The CRMA, ELV rules, mandatory recycled content — regulations that close supply chains within a region are emerging one after another.
The systems to bring resources in from outside already exist.
But the systems to source the resources at our feet do not.
Their volume, their quality, how they flow — none of it is visible.
This is the real meaning of the urban mine.
Japan, too, is now a party to this.
No longer a bystander.
With the Ouranos Ecosystem, the government
has begun integrating data across the entire supply chain.
The next question is how to seamlessly connect
the data from the field.
This infrastructure layer is what is needed now.
RECOTECH has worked on resource circulation since 2007. pool runs across 1,200 sites in the City of Yokohama and 340 tenants at Tamagawa Takashimaya S·C, and implementation has begun with several major real-estate developers.
With our Series A closed, we go from cities in Japan, and from there to Asia.
The story has only just begun.
A big wave is coming.
Every giant starts from a small step.
That is RECOTECH today.
02The Work
Powering the city's resource circulation with data.
pool is the data infrastructure for the city's resource circulation — connecting weighing, collection & transport, data logging, and recycling end to end, at the level of the tenant / department, building, or district. It links discharge, collection, and sourcing — long kept apart — on a single data foundation.
It always begins from the physical. How do you wire a system into what happens on the ground? How do you turn it into data?
An overwhelming understanding of the field is what matters.
Our clients are local governments, large commercial facilities, major real-estate developers, and major manufacturers. The scale of implementation is urban infrastructure itself. This is the work of bringing that structural change down to each single day on the ground.
Areas you'll work in
Product development / Project implementation / Government partnerships / Setting industry standards / International standards (GCP, CSRD, etc.)
03The Way
The three things we hold to.
These are not slogans but everyday criteria for judgment. In hiring interviews, in project design, in code reviews — we decide by holding ourselves to these three.
Get to the
02
Start Small,
Act Now.
An idea has no value. Start small, move now —
only then does it become value.
03
Be
Disruptive.
Know the frame inside out, then step outside it. Take on what has never been done, and transform the industry.
04Open Roles
The roles we're hiring for now.
Your role and years of experience matter, of course. Beyond that, we ask: who you are, and what you want to achieve. If it feels like a fit, let's start with a casual chat.
Working with the decision-makers of the city to implement pool across society. TAKANAWA PITCH 2026 grand prize, 1,200 sites in Yokohama — with inbound inquiries surging, we're looking for someone to stand up the strategy and the front line of new business themselves.
What you'll do
- Consultative selling: Structure the client's "environmental commitment" challenges and design a six-month to one-year journey, from PoC to full rollout.
- Opening new markets: Build relationships from first contact and create deals with major manufacturers, commercial facilities, and local governments.
- Working across teams: Bring needs from the field to product and engineering, and build solutions together.
- Designing the sales motion: Stand up and refine a repeatable sales process yourself.
Who we're looking for
- B2B sales experience with large enterprises / local governments (roughly 3+ years).
- The ability to structure client challenges and map a long-term journey.
- The drive to stand up areas with no playbook on your own.
- The ability to face enterprise decision-makers and open paths through dialogue.
Nice to have
- Consultative sales experience.
- Interest in the environment / circular economy / Resource Tech domains.
- 0→1 startup experience.
Terms
Apply for this role
Start with a casual chat — feel free to reach out.
Turn "where waste ends up" into data and rewrite the supply chains of ¥3-trillion-cap companies from behind the scenes. By 2027, major companies worldwide will be required by international rules to prove how much of the waste they generate they have recycled — yet the traditional waste industry still runs on paper slips and analog collection, making tracking impossible. What solves this is pool, the data infrastructure for resource circulation. With social implementation now underway across mega cases like 1,200 sites in Yokohama and Tamagawa Takashimaya, we're hiring a Tech Lead (Head of Engineering) to draw the grand technical design and lead the development team — to keep this from ending as "just another SaaS" and elevate it into national-scale infrastructure. We're looking for someone who works beyond just technology, crossing into business intent and the resolution of the field, and who can think and act on their own in an uncertain ~10-person phase.
What you'll do
- Grand design & requirements: Absorb the rule-making on the business side, and design and direct an architecture built for long-term maintainability and extensibility.
- Managing the development team: Lead a team of in-house engineers and contract partners, managing the WBS, progress, and quality.
- Stakeholder alignment: Serve as the hub between PdM, business, users, and developers, optimizing requirements.
- Driving cutting-edge tech: Lead R&D and technical validation for field automation — image-recognition AI, predictive models, weighing-hardware integration, and more.
Requirements
- Development and design experience at lead engineer level or above on B2B SaaS / enterprise products.
- Web app / Web API development and operations (roughly 3+ years).
- Requirements definition, DB design (SQL / PostgreSQL), and building & operating AWS infrastructure.
- Management / PM experience of an engineering team (roughly 5–6+ people, contractors included).
Nice to have
- 0→1 experience launching a new service or product.
- Experience managing contractors (offshore / nearshore included).
- Knowledge of data pipeline design (ETL / ELT) and data analysis.
- Knowledge of machine learning (image recognition), blockchain, and embedded software.
Why this role
- Turning the rules themselves into a system: Not building software to client requests, but joining from the business-design stage to design the very rules of resource circulation in Japan.
- A complex real × digital system: IoT weighing-hardware integration, UI/UX that prevents mistakes on the ground, AI that auto-classifies waste from images, collection-route prediction — take on design where the digital and the analog fuse.
- Autonomy and flexible work: Flextime with no core hours, remote-first. A hybrid team where members in Tokyo, Yamanashi, Hayama, and Yokohama move autonomously.
Dev environment
Terms
Apply for this role
Start with a casual chat — feel free to reach out.
An era where large enterprises and governments have no choice but to publicly commit to recycling rates and environmental action — yet the traditional waste industry still runs on paper slips and analog collection, making it hard to prove "which factory's plastic is now being recycled, where, and how." What solves this at its root is pool, the data infrastructure for resource circulation. It connects the entire process — generation, transport, weighing, regeneration — digitally, and makes it visible as trusted data (a Waste OS). With social implementation advancing across mega cases like 1,200 sites in Yokohama and Tamagawa Takashimaya, demand for adoption and new features is surging. We're hiring core engineers who don't just build to spec, but work broadly from planning and requirements through implementation, external integration, IoT connectivity, and AI — pushing the nation's "resource circulation infrastructure" forward, hands in the dirt. We're looking for people who work beyond just technology, drawing in the field and the business, and who can think and act on their own in an uncertain ~10-person team.
What you'll do
- Development & implementation: Extend pool's features with TypeScript / Kotlin / React.js, plus UAT (user acceptance testing), maintenance, and operations.
- Requirements & detailed design: Take part in the requirements definition and design of the pool system across frontend / backend / UI·UX.
- External partner coordination: Support smooth communication and progress management with outsourced development teams.
- Product improvement & tech foundations: Proactively propose improvements that reflect real operations and customer feedback, and strengthen the technical foundation.
- R&D support for cutting-edge tech: Assist in developing and validating image recognition, AI, predictive models, and weighing-hardware (IoT) integration, toward future value creation.
Requirements
- Web application development and operations experience (roughly 2–3+ years / any language; we value the appetite to pick up modern tech).
- Experience with system requirements definition and basic design, or DB design & build (SQL / PostgreSQL, etc.) — even partial is fine. Actual work is assigned according to your fit.
- Beyond technology, strong interest in and empathy for environmental and social-impact businesses.
Nice to have
- Experience launching a new service or driving a PoC (proof of concept).
- PM / PMO experience, or collaborating with and managing outsourced (contract) development teams.
- Android app development and operations experience (Kotlin).
- Experience building & operating AWS infrastructure, or knowledge of data pipelines (ETL / ELT).
Why this role
- Feel the front line of building social infrastructure: Featured in the Nikkei and watched by major governments like Tokyo, Yokohama, and Kawasaki — you'll feel the impact of driving this data infrastructure's social implementation with your own code.
- Cross into broad phases and grow: Not implementation-only — you'll gain "0→1 / 1→10" experience across planning, requirements, infrastructure design, and vendor management, raising your market value as an engineer.
- The thrill of a complex real × digital system: Take on edgy tech where the digital and the real fuse — weighing-device (IoT) integration, AI that auto-classifies items from images, collection-route prediction, and more.
- Broad autonomy in a lean team of under 10: A flat environment where, regardless of age or career stage, your proposals on the dev setup, latest tech, and process improvements go straight into the product.
Dev environment
Terms
Apply for this role
Start with a casual chat — feel free to reach out.
05Voices
What is happening here.
A word each from the members running now.
EN
I founded this company to "meet our responsibility to the next generation." Regulation, technology, capital — never in the past 18 years have they aligned like this. We build now.
Ei Nozaki
Representative Director, CEO
CB
pool aims to be a product that provides essential functions to every stakeholder and layer involved — transforming the waste stream into a supply chain, from the moment waste is discharged to the point it is reused as raw material after recycling. Beyond the basics of on-site DX, traceability, and sustainability analytics, the real question is how we deliver the insights and build the mechanisms that create genuine social impact. We design the product with both the parts and the whole always in mind.
Chie Bannai
Executive Officer, Product & Analytics
HO
Implementing a new economic model (the CE) in society is genuinely exciting, because it is uncharted territory. The data layer that captures first-hand information, in particular, is something no one has broken through — despite its importance — because the challenges on the ground are so complex. That is exactly why it is worth us taking on.
Hiroki Omura
Managing Director, Marketing & Sales
RA
No matter how clean the diagram you draw, it means nothing if it doesn't land in operations on the ground. I have long been looking for people to do the work of bridging "drawing the picture" and "making it run" with us.
Ryosuke Arai
Executive Officer, Product & Operations
06Process
How to apply.
It starts with a conversation. Let's get to know each other while going through your resume together.
Step 01
Casual chat
30–60 minutes. We'll share what pool is doing, and we'd love to hear about your journey and what you want to achieve. A place for both sides to decide whether they'd like to talk again.
Step 02
Team members + CEO interview
Conversations with members from the field and with the CEO. Time to align on the Values and make the picture of working together concrete. One to three rounds depending on the role.
Step 03
Offer
We present the terms and agree on a blueprint for your first 90 days. Please take the time to discuss it with your family too.