Cloud Infrastructure Engineer

About PayPay Securities / PayPay証券について PayPay is a FinTech company that has surpassed 70 million users (as of July 2025) in 7 years since its launch in 2018, is rapidly expanding its business scale as a payment platform used by approximately one out of every two smartphone users in Japan. PayPay Securities Corporation provides a unique and familiar asset management service that anyone can easily use in their daily lives as a specialized smartphone brokerage firm that can be used through PayPay. As a member of the PayPay Group, we are refining our products at an overwhelming speed that no other company can imitate, and we will promote the spread of cashless payments in Japan and the financial life platform that uses them at a dash. We are looking for people who are passionate about these things as professionals, who can identify issues on their own, and who can work together with others to create new value. ※ Please note that you cannot apply or be selected in parallel with PayPay Corporation, PayPay Card Corporation and PayPay Securities Corporation. 2018年にサービスを開始してから約7年でユーザー数7,000万人（2025年7月時点）を突破したフィンテック企業で ある「PayPay」は日本国内においてスマホユーザーのおよそ2人に1人が使用する決済プラットフォームとして急速 に事業規模を拡大しています。 PayPay証券株式会社は「PayPay」から使用できるスマホ専業証券会社として「資産運用」を日常の中で誰もが簡 単にできるユニークで身近な資産運用サービスを提供しています。 他社に真似できない圧倒的なスピードでプロダクトを磨き上げ、日本のキャッシュレス決済、またそれを使用した金

融ライフプラットフォームとしての普及を一気に推進することにプロフェッショナルとして情熱を持って取り組み、ユー

ザーの為に新しい価値創出を共に推進する仲間を募集します。 ※ PayPay証券株式会社へご応募いただく際にはPayPay株式会社、PayPayカード株式会社へ併願応募はご遠 慮いただいております。ご了承ください。

Job Description / 業務について PayPay Securities, as an important part of PayPay’s financial ecosystem, has launched “Point Management” with over 20 million users and “PayPay Asset Management, the first initiative in Japan that enables asset management on a payment application. Now that the business foundation of the financial ecosystem is finally in place, we intend to expand our business to change the structure of asset management in Japan, with the main target being those who have not yet started asset management or were not interested in it before. To achieve our goal, PayPay Securities is preparing to bring in technical talents not only from Japan but also globally, just as we have done with PayPay’s product division. As a Frontend Engineer, you will be collaborating with engineers, designers and QAs, and working in an environment where you can be one of the founding members to build up a new organization within PayPay Securities. ※ Please note that this job is for Japan Residents Only

PayPay証券はPayPayの金融エコシステムの重要な一角を担う企業として、2,000万ユーザーを超える「ポイント運 用」と、決済アプリ上で資産運用ができる日本初の取り組みである「PayPay資産運用」をスタートさせました。ようや く金融エコシステムの事業基盤が整ったところで、日本の資産運用の構造を変えるべく、これからはまだ資産運用を

始めていない方や関心がない方たちをメインターゲットと捉えて事業を拡大させていきます。 そのためにPayPay証券のエンジニアリング部門は、PayPayと同様なレベルでの技術力と開発スピードの向上およ び内製化を進めています。 日本国内に限らず海外からも優秀な人材を迎え入れるグローバル組織を構築する予定です。（英語力については

翻訳チームやWebツールを活用しながら入社後に学んで頂く形でも問題はありません）

Highlights of the opportunity / ポジションの魅力:

Be part of the team to build up a new organization and environment Develop skills in making business plans from a high perspective, through the high-level

coordination with departments and affiliated companies within PayPay Group to support the top management’s decision

Gain experience in a company that aiming to be the pioneer in the market to provide a brand new Mobile Securities services, which never had before during the era of Financial reformation

Able to utilize PayPay’s services and user base

新しい組織・環境を一緒に作り上げることができる点 経営トップの意思決定サポートや各部門・PayPayを始めとした関係会社とのハイレベルな調整を通じ、高

い視点に立った企画立案能力を獲得することができる点 金融業界の変革期のなかで、これまでにない新しいモバイル証券サービスの提供を目指す当社において、

業界の最前線にて業務経験を積むことができる点 PayPayのサービス・ユーザー基盤を活用できる点

Responsibilities / 主な担当業務:

Architect and build a robust, scalable and stable infrastructure Architect and build Infrastructure that is easily maintainable during patching and upgrades without

downtime Architect and build Infrastructure with AWS regional level failure tolerance Work together with our Security Engineers to provision a secure Infrastructure Automations for AWS Deployments to ensure fast delivery of Cloud Services to our developers Provide through Automations means for developers to easily deploy resources on AWS

堅牢でスケーラブルかつ安定したインフラストラクチャの設計と構築 パッチ適用やアップグレード時にダウンタイムが発生せず、容易に保守可能なインフラストラクチャの設計と

構築 AWSのリージョナルレベルの耐障害性を備えたインフラストラクチャの設計と構築 セキュリティエンジニアと協力して、安全なインフラストラクチャを提供する AWSへのデプロイを自動化し、開発者にクラウドサービスを迅速に提供する 開発者がAWSにリソースを簡単にデプロイできるよう、自動化手段を提供する

Qualifications / 必要なスキル・経験 :

5+ years of technical experience in AWS based Infrastructure solution design and build Experience in production level Infrastructure change management and releases for High traffic &

business-critical systems Good understanding of Cloud security best practices and payment industry compliance standards Experience in production incident management and cross team collaboration Extensive technical hands-on experience of Computing, Storage and Analytical Services on

Cloud(AWS) Experience with IAC tools in AWS such as Terraform etc. Experience with Linux Internals and System Administration Experience with Cloud Services Monitoring, Detection and Response Experience in Cloud Infrastructure Service patching and upgrades Have excellent written, verbal and interpersonal communication skills Business level in either English or Japanese (Native Japanese speaker or JLPT N1 equivalent)

5年以上のAWSを利用したプロダクトのインフラソリューション設計・構築の経験 高トラフィックかつビジネスクリティカルなシステムの本番レベルのインフラ変更管理、およびリリースの経

験 クラウドセキュリティのベストプラクティスと金融業界のコンプライアンス基準をよく理解していること 本番インシデント管理、およびチーム間コラボレーションの経験 AWS上のコンピューティング、ストレージ、分析サービスに関する豊富な技術的ハンズオン経験 TerraformなどのAWSにおけるIACツールの使用経験 Linuxの内部およびシステム管理の経験 クラウドサービスの監視、検知、対応経験 クラウドインフラサービスのパッチ適用とアップグレード経験 文書、口頭、対人コミュニケーションに優れたスキルを持っていること 日本語（日本語が母国語、もしくは、日本語能力試験N1同等レベル） 英語に苦手意識がないこと（業務において必要であれば通訳を介します）

Preferred Qualifications / あると望ましいスキル・経験:

Has maintained over 200 servers/containers in a production, customer facing cloud environment Experience in Disaster recovery for cloud systems and improvements for RTO and RPO Experience with other cloud service providers (e.g Google Cloud) Experience in Cloud Services Performance Tuning, cost controls and management Experience using and contributing to Open Source tools Published papers / blogs / articles - Experience in managing IT compliance and security risk Experience in working for infrastructure design and build in securities, finance, or similar

industries Experience in in-house service operations

本番環境、顧客向けクラウド環境で200台以上のサーバーを保守した経験 クラウドシステムのディザスターリカバリー、RTOとRPOの改善経験 AWS以外のクラウドサービスプロバイダー（GCPなど）の利用経験 クラウドサービスのパフォーマンスチューニング、コスト管理、マネジメント経験 オープンしたツールの利用、貢献経験 論文/ブログ/記事の発表、ITコンプライアンスとセキュリティリスクの管理経験 証券・金融業界でのインフラ設計、構築経験

インハウスでの自社サービス運用経験 英語（ビジネスレベルでの会話が可能なレベル）

The ideal candidates at PayPay Securities / PayPay証券が求める人物像

PayPay 5 senses

Working Conditions

Employment Status

Full Time

Office Location

Hybrid Workstyle (flexible working style including Remote and office)　　　　　　　　　　　　　　　　　　　　 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　※There are no fixed rules regarding office attendance in Product group; it depends on each individual's discretion.

Work Hours

Super Flex Time (No Core Time) In principle, 9:00am-5:45pm + 1h break (actual working hours: 7h45m + 1h break)

Holidays

Every Sat/Sun/National holidays (In Japan) Summer break (2 days / generally taken between July 1st and September 30th / subject to

change depending on month of employment) Year-end and New Year holidays (12/31-1/3)

Paid leave

Annual paid leave (1 to 10 days depending on the month of joining will be granted upon employment date)

Salary

Annual salary paid in 12 installments (monthly) Based on skills, experience and abilities Review once a year Special Incentive once a year *Based on company performance and individual contribution and

evaluation Overtime allowance, Late overtime allowance, Commuting and transportation expenses, Work

style support allowance

Benefits

Social Insurances (Health insurance, Employee pension, Employment insurance and Industrial accident compensation insurance)

401K

待遇・条件

雇用形態

正社員

勤務地

自宅または本社

勤務時間

スーパーフレックス制（コアタイム無し） 原則：午前9時～午後17時45分（実働7.75時間＋休憩時間 1時間）

休日

完全週休2日制（土日祝） 有給休暇（入社時付与あり／入社月に応じて1日〜10日付与） 夏季休暇（2日／原則7/1-9/30の間に取得／入社月に応じて変動あり） 年末年始休暇（12/31-1/3）

休暇（法定休暇および会社福利厚生）

年次有給休暇(初年度10日間、入社月に応じて按分付与。入社日から使用可）

給与

年俸制 経験、スキル、業績、貢献度に応じ当社規定により決定 昇給（年1回） 会社業績および個人貢献度により賞与支給（年1回） 時間外勤務手当、深夜勤務手当、通勤交通費、WorkStyle支援金

ベネフィット

社会保険（健康保険、厚生年金、雇用保険、労災保険） 企業型確定拠出年金（401ｋ）

Full Stack Engineer

#1 on ProductHunt. Over 10,000 AI agents generated worldwide within months of launch – that’s our voice AI agent platform Omakase.ai. The product has evolved with major updates including a voice+chat hybrid widget, a smarter recommendation engine, and Shopify integration. Monetization is live, and early ARR is tracking strongly. We’re confident in the trajectory for global impact — that’s why we’re hiring elite engineers to join us from Japan. Let’s scale a Japanese-born AI product globally! What We Do We’re revolutionizing sales with Omakase.ai – because chatbots just answer questions, but our Agentic Voice AI agents actually close sales. Our voice-powered sales agents behave like real sales reps – persuasive, helpful, and always on-brand. They provide live product recommendations during conversations, conversation analytics to understand customer behavior, and a smarter scraping engine that learns any website instantly with zero setup required. As a Full Stack Engineer You’ll dive into global AI product development during our zero-to-one phase. You’ll work directly with our CEO and core team from Japan while building for global markets, experiencing AI-driven development with rapid iteration from concept to release. This is your chance to shape the future of sales technology from the ground up in an international work environment that welcomes both Japanese and non-Japanese speakers. Your Typical Day With Us

Take full technical ownership of a key product domain (integration systems, data pipeline architecture, conversational AI engine, or client application layer)

Lead end-to-end full-stack development, from front-end interfaces to

backend services and data storage Make system architecture decisions designed to scale to millions of

concurrent users Provide technical leadership through expertise and execution, without

direct reports

What you'll Need

9+ years building production software systems 5+ years building scalable backend services in production environments with Go,

plus working knowledge of Ruby on Rails. Equivalent experience with other backend technologies (Python, C#, Node.js, etc.) will also be considered

3+ years building modern web applications with React or Vue Experience with distributed systems design and microservices architecture Global state management in complex frontend applications Production database optimization and query performance tuning CI/CD pipeline design and automated testing strategies Application monitoring, logging, and performance optimization Security implementation across authentication, authorization, and data protection Experience shipping features that measurably impacted business metrics

Technical Environment

Backend: Go microservices with Rails BFF layer Frontend: React with TypeScript Data: PostgreSQL with Redis caching Infrastructure: Cloud-native deployment with container orchestration Development: GitHub-based workflows with automated deployment

Preferred Experience

Server-side rendering or modern meta-frameworks (Remix, Next.js) Specific state management libraries (Jotai, Zustand, Recoil) Observability tools (application performance monitoring, distributed tracing) High-availability system operations and incident response Experience with AI-assisted development workflows and modern tooling (Cursor,

Windsurf, AI-enhanced IDEs) Startup work experience

What makes you stand out

Engineers who understand that chatbots suck and want to build something that

actually works Full-stack developers who can cross frontend/backend boundaries and

autonomously drive product growth Builders with curiosity and drive to immediately implement new AI/LLM

technologies into products Engineers who thrive on startup speed and can push beyond limits

Team & Culture

4-person technical team reporting directly to leadership "Always Be Launching" - rapid iteration with production focus Autonomous execution expected - minimal technical guidance provided Participate in incident response and system maintenance alongside founding

team, transitioning to structured on-call rotation as we grow Japanese conversational skills welcome for team collaboration

Interview Process

Application screening → HR interview → Technical interview → CEO interview → Panel interview → Offer

Now is the time to take your code to the world

We're going after the world now, not "someday." We're excited to create an incredible future with those who share our vibe.

AI R&D - 01. VP of Engineering, AI R&D

Third Intelligence

仕事概要

会社について

Third Intelligence は、日本発の AGI の確立に挑戦する、AI 研究・プロダクト開発企業で

す。Third Intelligence が独自に提唱する「遍在型 AGI（汎用人工知能）」の確立と個人に

寄り添ったその成⾧を通じて、社会の新たな基盤となるサービスの実現を目指します。

私たちは、2 つの事業を展開しています。

1 つは、日本発の汎用人工知能（AGI）の実現。従来のような巨大なモデルを全利用者に

一律に提供するのではなく、利用者に合わせて独自に成⾧する「遍在型 AGI」の実現を目

指しています。

もう 1 つは、遍在型 AGI の特性を活かした生活者向けグローバルプロダクトの構築です。

2026 年 1 月に国内最大規模の 100 億円規模の初回資金調達を完了し、博報堂 DY グループ

との資本業務提携を経て、研究開発並びにプロダクト開発を加速しています。

ポジションについて

ポジションの意義・背景

当社の AI 研究開発組織において、エンジニアリングの観点から組織の生産性向上と研究

開発プロセスの変革を推進し、Research Scientist や Research Engineer が研究に集中し、

より高い成果を出せる環境を作り上げていくポジションです。Head of AI Development の

畠山と連携しながら、AI R&D 組織のエンジニアリング基盤と開発プラクティスを設計・

推進していただきます。

業務内容・期待成果

AI R&D 組織のマネジメント

AI R&D 組織のエンジニアリング面でのビジョン策定と中⾧期ロードマップの設計

Head of AI Development 等と連携し、研究開発の技術的方向性やリソース配分に関する意

思決定を主導

エンジニアリングバックグラウンドを持つ人材の採用戦略の立案・実行（Talent

Acquisition チームと連携）

チームメンバーのピープルマネジメント、技術力の評価、キャリア成⾧の支援

AI R&D 組織のエンジニアリング力強化

研究者の生産性を最大化するための開発基盤・ツールチェーン・ワークフローの設計と導

入

研究開発プロセスにおける AI 活用の推進

コードベースの品質管理、実験管理、再現性確保のためのプラクティスの確立

研究成果のスケーラビリティ確保

研究成果をプロダクトに展開するためのアーキテクチャ設計とプロセス整備

プロダクト開発チームとの技術的なブリッジ役として、複雑な研究成果をビジネスサイド

や他チームのステークホルダーへ効果的に伝達

大規模計算基盤の効率的な活用の推進

対外発信・技術プレゼンスの向上

カンファレンス登壇、技術ブログ等を通じた、エンジニアリング視点での技術的プレゼン

スの向上

AI R&D 組織の魅力を外部に発信し、優秀な人材の獲得に貢献

必須スキル

AI/ML 領域におけるソフトウェアエンジニアリングの実務経験（10 年以上）

研究開発組織でのマネジメント経験

10 名以上の研究組織や開発チームの立ち上げ、および拡大をリードした経験

Python、PyTorch など深層学習関連技術への深い理解

大規模分散学習や HPC インフラを活用した開発経験

ビジネスレベルの英語

歓迎スキル

基盤モデルの開発・運用経験、または関連領域での AI システムの End-to-End 構築経験

フロンティアモデルや LLM の開発・運用経験

研究組織における開発基盤や MLOps の設計・構築経験

英語による技術議論およびグローバルな開発体制における業務経験

BigTech 水準の AI 研究チームにおけるエンジニアリングリード経験

研究者のワークフロー改善や AI 活用促進の施策を主導した経験

C++/CUDA などの低レイヤー言語を用いた最適化経験

AI/ML 関連分野の修士・博士号

特許戦略の立案や、研究成果を事業に紐づけるための技術ロードマップの作成経験

応募概要

給与

応相談

※ストック・オプション制度有

勤務地

101-0052 東京都千代田区神田小川町 1 丁目 4 WORK VILLA MYJ KANDA 11F

地方からフルリモート OK。

ただし毎週、月曜日・金曜日は出社推奨日、かつ月 1 回の AllHands 出社が必要(交通費支

給)

雇用形態 正社員

勤務体系

専門型裁量労働制 または、フルフレックス（所定労働時間 8 時間、45 時間分の固定残業

代あり。超過分は別途支給）

休日：土・日、祝日、年末年始 等

入社時に特別休暇を 3 日付与（有効期限半年）、その後 6 ヶ月勤務後から最低 10 日～最大

20 日の年次有給休暇を付与

ほか特別休暇あり（慶弔休暇、アニバーサリー休暇など）

加入保険：雇用保険・労災保険・健康保険・厚生年金

試用期間 3 ヶ月

福利厚生

For Productivity

フルフレックスタイム制 or 裁量労働制

ハイブリッドワーク

東京移住時の引越補助

利用端末のスペック選択

ガジェット補助

各 AI ツールの導入推進

For Growth

書籍購入補助

海外カンファレンス参加補助

MOOCs 受講補助

英語・日本語学習支援

松尾研講座の受講補助

For Communication

チームビルディング目的の食事補助

オフサイト補助

Monthly All-Hands の実施（フルリモートも交通費補助）

フリードリンク、フリースナック

For Life Plan

エッグフリージング補助・支援

今後導入予定（変更となる可能性があります）

学費ローンの代理返済

サバティカル休暇

確定拠出年金

For Family

ベビーシッター／病児シッター補助

看護・介護休暇

アニバーサリー休暇

産休・育休・時短勤務歓迎

希望に応じて育休中の 1:1 実施

企業情報

企業名 株式会社 Third Intelligence

本社所在地 東京都千代田区神田小川町 1 丁目 4 WORK VILLA MYJ KANDA 11F

事業内容

Third Intelligence は、日本発の AGI の確立に挑戦する、AI 研究・プロダクト開発企業で

す。Third Intelligence が独自に提唱する「遍在型 AGI（汎用人工知能）」の確立と個人に

寄り添ったその成⾧を通じて、社会の新たな基盤となるサービスの実現を目指します。

Third Intelligence Company Deck（別タブで開きます）

私たちは、2 つの事業を展開しています。

1 つは、日本発の汎用人工知能（AGI）の実現。従来のような巨大なモデルを全利用者に

一律に提供するのではなく、利用者に合わせて独自に成⾧する「遍在型 AGI」の実現を目

指しています。

もう 1 つは、遍在型 AGI の特性を活かした生活者向けグローバルプロダクトの構築です。

2026 年 1 月に国内最大規模の 100 億円規模の初回資金調達を完了し、博報堂 DY グループ

との資本業務提携を経て、研究開発並びにプロダクト開発を加速しています。

Job Discription

Company information

Synspective Inc. URL https://synspective.com/

Address 3-10-3 Miyoshi, Koto-ku, Tokyo, 135-0022, Japan

Company overview

SAR Image Data Sales Satellite Data Solution Services Development and Operation of Small SAR Satellites

Job description

【Position】 Satellite System Engineer

【About Job】 About Dept. and Unit The Satellite Development Department 1 designs, develops and operates satellites. Systems Engineering Team is in charge of satellite system design, satellite development process management, and design of satellite development process. Responsibility As a Satellite Systems Engineer, you will be responsible for the entire satellite system and development process. You will play a key role throughout the entire lifecycle of satellites, from concept and design to post-launch operations. You will be involved in end-to-end system engineering activities, collaborating with diverse and skilled members. Details of work

● Design of satellite system ● Conduct system-level analysis and manage system budget ● Develop and execute system verification and validation plans ● Design operation concepts and define operation scenarios ● Define, manage and track system-level requirements ● Oversee configuration and change management processes ● Manage interface between subsystems ● Continuously improve the development process and contribute to best

practices ● Coordinate with cross functional teams ● Manage workgroups or teams

Job Discription

● Manage satellite development schedule Selling points of this role

● Be involved in every phase of satellite development, from initial design to launch and operations, all the way through end-of-life.

● Work in a flexible and dynamic development environment, free from rigid large-coorporation processes.

● Join a team striving to be among the top global players in the field. ● Collaborate with professionals from diverse backgrounds, bringing

fresh perspectives to innovation. ● Develop satellites for internal missions rather than external clients,

enabling greater design freedom and adaptability. ● Contribute to society in various important areas such as disaster

prevention and disaster monitoring. （Scope of Change） All company operations

Minimum qualifications

● Bachelor degree in technical field. ● Experience working with MATLAB and Simulink. ● Minimum of 5 years work experience required in designing,

implementing and realizing physical, cross-functional products, regardless of specific industry (e.g., aerospace, automobile, consumer devices) or engineering domains (e.g., systems engineering, mechanical, electrical, software).

● Business Level English and Conversational level Japanese proficiency are required

● Experience in project management, including leading teams, defining directions, and managing schedules and budgets where you have proven:

● Great organizational skills ● Ability to synthesize diverse opinions, structure information, and

propose compromise solutions that align team consensus. ● Communication and interpersonal skills, including active listening,

logical verbalization of ideas, and confirmation of mutual understanding.

Preferred qualifications

● Business level Japanese language proficiency ● Work experience in Space Industry ● Work experience in System Engineering field ● Knowledge of either spacecraft thermal systems or spacecraft

electrical power systems

職

Working Conditions

Job Discription

Workplace （Initial Workplace） 3-10-3 Miyoshi, Koto-ku, Tokyo （Scope of Change） Any company office/business location

Employment Status

Full-time Employee (Permanent)

Expected Annual Salary

To be discussed / Negotiable

Probationary Period

3 months

Holidays/Leave - Annual Holidays: 122 days (for FY2024) - Breakdown: * Full five-day work week (Saturdays, Sundays, and

Public Holidays) - Year-end and New Year holidays (December 29 – January 3)

Social Insurance Health Insurance, Employees' Pension, Employment Insurance, Workers' Accident Compensation Insurance (Full coverage)

Benefits & Welfare

Working Hours: Flextime system / Discretionary work system Growth & Development: * Personnel evaluation system

● Learning & development cost support ● External coaching services

Work-Life Balance: * Maternity and childcare leave

● Remote work system (depending on the position) ● Side jobs permitted (subject to specific conditions)

Team Culture: Team lunch expense support

Other

【Interview】 3~4 times

Job Discription

Company information

Synspective Inc. URL https://synspective.com/

Address 3-10-3 Miyoshi, Koto-ku, Tokyo, 135-0022, Japan

Company overview

SAR Image Data Sales Satellite Data Solution Services Development and Operation of Small SAR Satellites

Job description

【Position】 Senior Ground Platform Engineer(Senior SRE)

【About Job】 About Dept. and Unit The Data Production Department operates Synspective’s proprietary small SAR satellites (“StriX” series), produces imagery from satellite data, and manages data delivery. Within this department, the Ground Platform Engineering Unit (GPE Unit) designs, develops, and operates the entire cloud platform responsible for core functionalities such as orbit operations, ground station communication, and image generation from observation data. Responsibility We are seeking a cloud engineer responsible for the design, development, and maintenance of our cloud platform, as well as the construction of a Disaster Recovery (DR) site. Details of work

● Design, build, and operate satellite ground system infrastructure in cloud environments using Terraform, including the design, deployment, and management of Kubernetes clusters, as well as improving development productivity through CI/CD pipeline optimization.

● Lead the design, validation, and implementation of a Disaster Recovery (DR) site architecture, driving the project in collaboration with cross-functional stakeholders.

● Plan and implement security enhancement measures and ensure

Job Discription

compliance with relevant regulatory and organizational requirements. ● Strengthen monitoring and alerting systems to support large-scale

satellite fleet operations. ● Continuously improve operational efficiency through the use of AI

agents for automation, cost optimization, and performance tuning. Selling points of this role

● Work on mission-critical systems running primarily on Google Cloud. ● Be part of a company actively promoting AI utilization, integrating AI

agents (Claude Code, Cursor, Gemini) to tackle social and business challenges through the intersection of satellite and AI technologies.

● Gain hands-on experience building systems with unique requirements that differ from typical web applications.

The space industry is undergoing a major shift—from government-led initiatives to private-sector innovation. With Japan’s commitment to investing one trillion yen over ten years in its national space strategy fund, expectations for private space companies are rising.

Synspective aims to build a 30-satellite constellation by the late 2020s, giving you the opportunity to work at the forefront of Japan’s commercial space industry. Because few companies develop and operate both satellites and ground systems in-house, this offers a rare chance to work at the leading edge of the space business. Unlike typical vendor-led projects, our engineers design, develop, and operate their own end-to-end systems—allowing you to experience system evolution firsthand in a short time.

You’ll also collaborate with diverse experts across disciplines and tackle challenging goals, building skills essential for success in the global technology landscape. （Scope of Change） All company operations

Minimum qualifications

● 3+ years of experience as an Infrastructure Engineer, Cloud Engineer, SRE, or DevOps Engineer

● Experience building cloud-native systems using Kubernetes and Docker on a major cloud provider (AWS, Google Cloud, or Azure)

● Experience with Infrastructure as Code tools such as Terraform or OpenTofu

● Strong knowledge of computer networks ● Software development experience (requirements gathering, design,

programming, maintenance) ● Familiarity with CI/CD tools and processes (e.g., GitHub Actions,

Cloud Build, Cloud Deploy, or equivalent) ● Experience developing and operating systems in Linux environments

with an understanding of HTTP/HTTPS, DNS, load balancers, and

Job Discription

databases ● Over 6 months of experience using major AI coding assistants (e.g.,

Claude Code, Codex, Gemini, Cursor) ● Willingness to respond flexibly to occasional weekend or nighttime

incidents (about once per month) ● Comfortable communicating in English, both written and spoken ● Able to commute to the Tokyo headquarters at least once per week

Preferred qualifications

● Experience in defense, aviation, or space-related system development ● Experience adopting or operating observability tools or systems ● 3+ years of programming experience in C, C++, Go, Rust, or Python ● Experience with on-premises system construction or operation ● Experience in cloud cost optimization (FinOps), performance tuning,

incident response, and DR site design ● Experience in system renewal/migration projects for mission-critical

systems or multi-region architectures ● Business-level Japanese proficiency (JLPT N1 or equivalent, for

non-native speakers)

Technology Stack (Ground Systems)

● Google Cloud (GKE, Cloud Run, BigQuery, Cloud SQL) ● Kubernetes, Docker, Argo CD, Argo Rollouts ● Rust (mission control, data analysis), Go (observation planning,

command generation), Python ● Observability: Datadog ● Coding Agents: Claude Code, Gemini, Cursor

Ideal Candidate Profile

● Proactive and self-driven in pursuing work ● Team player with strong communication skills ● Interest in satellite communications or space-related fields ● Open to continuous learning and knowledge sharing

職

Working Conditions

Workplace （Initial Workplace） 3-10-3 Miyoshi, Koto-ku, Tokyo （Scope of Change） Any company office/business location

Employment Status

Full-time Employee (Permanent)

Expected Annual Salary

To be discussed / Negotiable

Job Discription

Probationary Period

3 months

Holidays/Leave - Annual Holidays: 122 days (for FY2024) - Breakdown: * Full five-day work week (Saturdays, Sundays, and

Public Holidays) - Year-end and New Year holidays (December 29 – January 3)

Social Insurance Health Insurance, Employees' Pension, Employment Insurance, Workers' Accident Compensation Insurance (Full coverage)

Benefits & Welfare

Working Hours: Flextime system / Discretionary work system Growth & Development: * Personnel evaluation system

● Learning & development cost support ● External coaching services

Work-Life Balance: * Maternity and childcare leave

● Remote work system (depending on the position) ● Side jobs permitted (subject to specific conditions)

Team Culture: Team lunch expense support

Other

【Interview】 3~4 times

Full Stack Engineer

#1 on ProductHunt. Over 10,000 AI agents generated worldwide within months of launch – that’s our voice AI agent platform Omakase.ai. The product has evolved with major updates including a voice+chat hybrid widget, a smarter recommendation engine, and Shopify integration. Monetization is live, and early ARR is tracking strongly. We’re confident in the trajectory for global impact — that’s why we’re hiring elite engineers to join us from Japan. Let’s scale a Japanese-born AI product globally! What We Do We’re revolutionizing sales with Omakase.ai – because chatbots just answer questions, but our Agentic Voice AI agents actually close sales. Our voice-powered sales agents behave like real sales reps – persuasive, helpful, and always on-brand. They provide live product recommendations during conversations, conversation analytics to understand customer behavior, and a smarter scraping engine that learns any website instantly with zero setup required. As a Full Stack Engineer You’ll dive into global AI product development during our zero-to-one phase. You’ll work directly with our CEO and core team from Japan while building for global markets, experiencing AI-driven development with rapid iteration from concept to release. This is your chance to shape the future of sales technology from the ground up in an international work environment that welcomes both Japanese and non-Japanese speakers. Your Typical Day With Us

Take full technical ownership of a key product domain (integration systems, data pipeline architecture, conversational AI engine, or client application layer)

Lead end-to-end full-stack development, from front-end interfaces to

backend services and data storage Make system architecture decisions designed to scale to millions of

concurrent users Provide technical leadership through expertise and execution, without

direct reports

What you'll Need

9+ years building production software systems 5+ years building scalable backend services in production environments with Go,

plus working knowledge of Ruby on Rails. Equivalent experience with other backend technologies (Python, C#, Node.js, etc.) will also be considered

3+ years building modern web applications with React or Vue Experience with distributed systems design and microservices architecture Global state management in complex frontend applications Production database optimization and query performance tuning CI/CD pipeline design and automated testing strategies Application monitoring, logging, and performance optimization Security implementation across authentication, authorization, and data protection Experience shipping features that measurably impacted business metrics

Technical Environment

Backend: Go microservices with Rails BFF layer Frontend: React with TypeScript Data: PostgreSQL with Redis caching Infrastructure: Cloud-native deployment with container orchestration Development: GitHub-based workflows with automated deployment

Preferred Experience

Server-side rendering or modern meta-frameworks (Remix, Next.js) Specific state management libraries (Jotai, Zustand, Recoil) Observability tools (application performance monitoring, distributed tracing) High-availability system operations and incident response Experience with AI-assisted development workflows and modern tooling (Cursor,

Windsurf, AI-enhanced IDEs) Startup work experience

What makes you stand out

Engineers who understand that chatbots suck and want to build something that

actually works Full-stack developers who can cross frontend/backend boundaries and

autonomously drive product growth Builders with curiosity and drive to immediately implement new AI/LLM

technologies into products Engineers who thrive on startup speed and can push beyond limits

Team & Culture

4-person technical team reporting directly to leadership "Always Be Launching" - rapid iteration with production focus Autonomous execution expected - minimal technical guidance provided Participate in incident response and system maintenance alongside founding

team, transitioning to structured on-call rotation as we grow Japanese conversational skills welcome for team collaboration

Interview Process

Application screening → HR interview → Technical interview → CEO interview → Panel interview → Offer

Now is the time to take your code to the world

We're going after the world now, not "someday." We're excited to create an incredible future with those who share our vibe.