Remote IT jobs in Japan

Join the SDK team at Supabase to own the Python developer experience. You will build and maintain the library that connects Python applications to Supabase services, including Database, Auth, and Edge Functions. The work is public, involving open repositories, issue triage, and community collaboration. This role requires deep expertise in modern Python typing and asyncio. You will design APIs that feel natural in Python, manage dependency ranges, and ensure the SDK works seamlessly across various environments like serverless, notebooks, and AI agents.

• Fully remote (Global)
• Python + Asyncio
• Open Source focus
• ESOP included

Join Animation Inc. as a freelance writer to shape the voices of AI characters in the Animates app. You will create authentic Japanese dialogue that reflects distinct personalities, emotions, and conversational rhythms, moving beyond simple translation to true creative expression. The team values creativity and an ear for nuance over years of experience. You will collaborate with international product and creative teams to ensure characters feel alive and build genuine connections with users through text.

• Freelance contract
• Native Japanese required
• English communication
• AI companion app

Join BJAK, a leading insurance and financial platform in Southeast Asia, as a Mobile UI Designer. You will create elegant, intuitive interfaces for mobile applications used by millions, focusing on insurance, payments, and investments. Working alongside product managers and engineers, you will build design systems and ensure high-quality implementation across devices. This position demands a mobile-first mindset and strong attention to visual detail.

• Fully remote (Japan)
• Mobile UI Design
• Figma expert
• iOS & Android

BJAK seeks an Engineering Manager to lead a high-performing team developing scalable financial applications. You will drive engineering decisions, ensure code quality, and manage delivery across frontend, backend, and full-stack domains. The position requires balancing technical depth with people leadership. You will collaborate with product and design teams to translate ambiguous problems into clear technical execution while maintaining high standards for reliability and speed.

• Hybrid (3 days office)
• Engineering Manager
• Full-time position
• English required

As a PMO at Trust Wallet, you will act as the connective tissue between Product and Engineering, ensuring complex projects stay on track. You will drive initiatives to completion by managing dependencies, clearing blockers, and maintaining healthy team dynamics through empathetic leadership.

• Fully remote (Global)
• Web3 & Crypto focus
• Bridge Product & Eng
• 3+ years experience

You will manage print curriculum projects from kickoff to final file delivery, ensuring alignment with business goals. Reporting to the Director of Program Management, you will coordinate with internal stakeholders, external vendors, and contractors to maintain project status and resolve production issues.

• Print curriculum focus
• English & Spanish products
• Vendor management
• JIRA & Monday.com

Join ElevenLabs to design and scale automated moderation systems, abuse detection capabilities, and guardrails for AI agents. You will own the architecture and reliability of internal safety services while partnering with ML engineers to deploy models into production. The team collaborates closely with Product, Legal, and Safety Policy groups to translate regulatory requirements into practical engineering solutions. This position focuses on building end-to-end backend services and tools that ensure platform safety without compromising user experience.

• Fully remote (Global)
• Python + Backend
• AI Safety focus
• Senior level

Join the C++ Functional Team at DuckDuckGo to develop core browser technologies focused on privacy and performance. You will implement features like tracker blocking and VPN integration while ensuring the browser remains fast and responsive. This position offers end-to-end ownership of projects, requiring you to translate vague problems into clear technical plans. You will collaborate asynchronously with product and design teams to deliver solutions that protect user privacy.

• Senior C++ Engineer
• Fully remote worldwide
• Modern C++ & Chromium
• €157k annual salary (EU)

You will drive product direction for major AI Investing areas, balancing strategy with hands-on execution. This position requires leading cross-functional squads to deliver high-quality financial tools while navigating regulatory and business constraints. BJAK is expanding beyond insurance into spending, saving, and investing. You will help simplify complex financial journeys for users across Southeast Asia, working with a diverse global team.

• Product Lead
• AI Investing focus
• Hybrid (Japan)
• Fintech experience plus

You will own product areas within BJAK's AI Neobank, covering services like insurance, payments, and investing. The team focuses on turning complex financial products into simple customer journeys by collaborating closely with engineering, design, and data teams. This position requires a builder who can define roadmaps, launch features quickly, and iterate based on user feedback and production data. You will make trade-offs between speed, compliance, and user experience to help people get more from their money.

• Hybrid (Japan)
• Fintech & AI
• English required
• Fast hiring process

Join BJAK as a Technical Product Owner to drive product areas within the AI Investing division. You will define user problems, manage roadmaps, and work closely with engineering and design teams to launch and iterate on financial products. The company is expanding beyond insurance into savings, investing, and travel, aiming to help users get more from their money. This role requires high ownership and the ability to make decisions with incomplete information.

• Hybrid (Japan)
• AI Investing focus
• Fintech experience plus
• Strong English required

Join BJAK, the leading mobile-first insurance platform in Southeast Asia, as it expands into broader financial services. You will secure AI products by managing risks associated with third-party models, agent permissions, and user data isolation. The team works globally to redefine financial accessibility through next-generation technology.

• AI Security focus
• Python + TypeScript
• 3+ years experience
• English required

As a Security Architect at BJAK, you will define security architecture across products, applications, and cloud platforms. You will partner with Engineering, Product, and Compliance teams to build secure systems that meet regulatory requirements in Southeast Asia. You will lead threat modeling, design reviews, and implementation of security controls for AWS and GCP environments. Your work ensures the safety of millions of users accessing insurance and financial services through mobile-first platforms.

• Fully remote role
• Security Architecture
• AWS and GCP
• Regulatory compliance

Join BJAK, the leading mobile-first insurance platform in Southeast Asia, as a Data Privacy Security Engineer. You will partner with engineering, legal, and compliance teams to secure sensitive data across products and third-party services. Your work will focus on reducing risks through privacy-by-design principles, managing data flows, and ensuring compliance with regional regulatory frameworks while supporting the company's mission to help people manage their finances.

• Data Privacy Engineering
• AWS and GCP
• 3+ years experience
• English required

Join BJAK, the leading mobile-first insurance platform in Southeast Asia, as you help redefine how people manage their money. You will work with global teams to embed security into CI/CD pipelines and cloud infrastructure, ensuring safe and efficient product delivery.

• AWS + GCP
• DevSecOps focus
• English required
• 3+ years exp

BJAK is expanding its financial services beyond insurance to include spending, saving, and investing. As a Cloud Infrastructure Security Engineer, you will protect cloud environments across AWS and GCP, strengthening configuration, access controls, and resilience. You will work with a diverse global team to redefine financial applications for the region.

• AWS + GCP security
• Compliance focus
• Infrastructure as Code
• Global team

Join BJAK, the leading mobile-first insurance platform in Southeast Asia, as an Application Security Engineer. You will secure web applications, APIs, and backend services while coordinating with mobile stakeholders to manage cross-platform risks. Your work will focus on integrating security into design, development, and release workflows. You will help redefine how people in the region plan, save, and grow their money by ensuring robust protection for financial applications.

• Fully remote (Global)
• AppSec + Pen Testing
• OWASP Top 10 Expertise
• 3+ Years Experience

Join Kraken’s global engineering team to develop technology that redefines utilities and optimizes renewable energy generation. You will work on a large-scale operating system that empowers utilities to deliver better customer experiences and manage intelligent grids. This position involves solving complex problems in energy markets, financial products, or communication engines. You will collaborate with a multi-discipline team of around 1,400 engineers, utilizing agile methods and cutting-edge tools to drive industry transformation.

• Mid-level Backend Role
• Python & Django Stack
• Remote in Japan
• No Visa Sponsorship

Actai builds AI-native applications for email, notes, tasks, and calendars, aiming to reduce the need for complex prompting. The team focuses on high reliability, persistent context, and real-world task completion to organize users' lives. As a Product Designer, you will define new interaction patterns for human-AI collaboration. You will create interfaces that allow users to guide, correct, and monitor AI actions across multi-step workflows, ensuring clarity and trust in automated processes.

• Product Design (UX/HCI)
• AI workflow design
• Figma proficiency
• Small high-density team

ActAI is building proactive, AI-native applications for email, notes, tasks, and calendars that require minimal prompting. The company focuses on high reliability for long-running workflows and real-world task completion to help users organize their lives efficiently. As Strategy & Operations Lead, you will partner with core teams to execute critical business initiatives. You will help scale the organization by establishing new capabilities, improving operational efficiency, and driving strategic projects from planning to delivery.

• Strategy & Ops Lead
• Fully remote possible
• Cross-functional role
• High ownership culture

ActAI is building proactive, AI-native applications for email, notes, tasks, and calendars that require minimal prompting. The company focuses on high reliability, persistent context, and real-world task completion to organize users' lives. As Head of Strategy and Product, you will work closely with core teams to solve business challenges, build new processes, and drive execution. You will lead cross-functional projects from planning to delivery while researching new market opportunities.

• Head of Strategy and Product
• Fully remote possible
• AI-native productivity tools
• Cross-functional leadership

ActAI is building proactive, AI-native applications for email, notes, tasks, and calendars that require minimal prompting. The company focuses on high reliability, persistent context, and real-world task completion to help users organize their lives efficiently. As a Strategy & Operations Associate, you will partner with core teams to execute critical projects, improve internal processes, and support company growth. You will lead cross-functional efforts from planning to delivery, ensuring meaningful business outcomes.

• Strategy & Operations
• Cross-functional role
• High ownership culture
• Fast-paced environment

ActAI is building proactive, AI-native applications for email, tasks, and calendars that require minimal prompting. As Director of Business Operations, you will establish the operational backbone supporting the company’s global scale, ensuring efficient execution across markets. You will lead business operations partners, oversee entity incorporation, manage external vendors, and support recruiting logistics. This hands-on role requires driving process improvements and managing complex projects across finance, legal, and administrative functions.

• Director level role
• Global business ops
• Fully remote setup
• High ownership culture

ActAI is building proactive, AI-native applications for email, notes, tasks, and calendars that require minimal prompting. The company focuses on high reliability for long-running workflows and real-world task completion to help users organize their lives. As Lead, Strategy, you will partner with core teams to execute priority initiatives, research new markets, and improve operational processes. You will help build new teams and capabilities as the company scales, ensuring meaningful business outcomes through direct contribution.

• Lead, Strategy role
• Fully remote position
• Cross-functional leadership
• High ownership culture

ActAI is building proactive, AI-native applications for email, notes, tasks, and calendars that require minimal prompting. The company focuses on high reliability for long-running workflows and real-world task completion to help users organize their lives. As a Business Operations Associate, you will partner with core teams to execute critical projects, improve operational processes, and support company growth. You will lead cross-functional efforts from planning to delivery, ensuring meaningful business outcomes.

• Cross-functional role
• High ownership culture
• Fast-paced environment
• Strategic problem solving

ActAI is building proactive, AI-native applications for email, notes, and tasks that require minimal prompting. As a Founder's Associate, you will work closely with core teams to execute critical projects, improve operational processes, and help scale the company's capabilities.

• Founder's Associate
• Cross-functional role
• High ownership
• Fast-paced startup

You will be the first dedicated product hire focused on user acquisition, reporting to the product lead for Ads. Your mission is to transform RevenueCat's existing data and infrastructure into products that help developers find and acquire the right users, moving beyond just monetization. This role requires navigating ambiguity to identify high-impact opportunities in attribution, measurement, and advertising infrastructure. You will define the roadmap from scratch, leveraging deep insights into subscription outcomes to create unique value for app businesses.

• Senior Product Manager
• Fully remote global team
• Zero-to-one product role
• Mobile UA expertise required

Join SpaceXSI to build Super Intelligence technologies, including Colossus supercomputers and Grok models. As a Forward Deployed Engineer, you will work directly with customers to identify bottlenecks and ship production AI agents that solve real business problems. You own the entire lifecycle from discovery to launch, ensuring systems remain operational after deployment.

• Fully remote or onsite
• Japan based
• Japanese + English
• Python + TypeScript

You will own the strategy and execution for Supabase Realtime, shaping how developers build live, collaborative, and event-driven applications. Working closely with engineering and design, you will prioritize features like Postgres Changes and define packaging and pricing. This position requires a deep understanding of full-stack development and real-time sync patterns. You will use data to guide decisions and ensure alignment across product, go-to-market, and engineering teams.

• Fully remote (global)
• Async-first culture
• Postgres + Realtime
• Developer tools focus

You will own the developer experience for Supabase Auth, managing features such as email, social login, passkeys, MFA, and enterprise SSO. Working closely with engineering, design, and security teams, you will shape how developers authenticate users and manage identity in their applications. The ideal candidate understands modern authentication protocols and can balance the needs of indie developers with enterprise security requirements. You will drive the product strategy using data and direct customer feedback from various segments.

• Fully remote (global)
• Async-first culture
• Auth & Identity focus
• Developer tools PM

Join Supabase as a Postgres Deployment Engineer to elevate their PostgreSQL offerings. You will co-own the stability and deployment of products via the public supabase/postgres repository, acting as a bridge between product and infrastructure teams. The position focuses on packaging features into Docker images and AWS AMIs, enabling users to run Supabase on cloud or locally. You will refine internal methodologies and support developer self-service capabilities.

• Fully remote (global)
• PostgreSQL expert
• Nix + Docker + AWS
• ESOP included

Join the Productions team at ElevenLabs, a marketplace combining AI audio tools with human expertise. You will produce high-quality, human-edited transcripts and subtitles for clients ranging from YouTube channels to major publishers. The role offers flexible scheduling and task-based compensation within a global, AI-first environment.

• Fully remote (Global)
• Freelance contract
• Flexible workload
• Transcription & Subtitling

You will join the Salesforce Team to build and maintain the CRM systems powering event registration, grants tracking, and community engagement. Working closely with the Salesforce Engineer and Administrator, you will translate operational needs into scalable solutions for Events, Online, Groups, and Community Health teams.

• US PT to CET time zones
• Salesforce Platform Dev I
• Apex + SOQL
• Global benefits package

Supabase is establishing a central team to build and run an AI-native internal operating system where agents handle operational loads end-to-end. As the Head of AI Native Operations, you will design the architecture, build critical components, and ensure every agent is correct, safe, and improving. You will lead senior individual contributors in extending this platform and driving its adoption across various teams.

• Fully remote (global)
• Lead AI Ops team
• Build autonomous agents
• Equity ownership (ESOP)

Join the Web Dependability Engineering team to ensure seamless browsing experiences across DuckDuckGo's desktop and mobile applications. You will act as the resident expert on web compatibility, diagnosing why sites break and implementing durable fixes. Recent initiatives include reverse-engineering site detection of privacy protections, shimming browser APIs, and developing LLM agent pipelines to automate issue triage. You will take full ownership of projects from scoping to execution in a culture that values trust and empowered project management.

• Senior level role
• Fully remote worldwide
• JavaScript + Web Standards
• €157k base salary (EU)

Join the Privacy Functional Team at DuckDuckGo to protect user privacy across key company objectives. You will design systems for search indexes and AI features, build on the Tracker Radar crawler, and maintain Web Tracking and Email Protections. This position offers end-to-end ownership of projects, from scoping to postmortem. You will also participate in privacy reviews and eventually mentor other engineers to support team growth.

• Senior level role
• Fully remote team
• Go, Node.js, Python
• Privacy focus

Join HOLYWATER TECH as the sole designer on a new team creating an AI-native EdTech tool for filmmakers. You will define the user experience and visual identity of a product that merges human creativity with artificial intelligence, working directly with stakeholders to shape the vision. The company operates leading entertainment platforms like My Drama and My Muse, serving over 100 million users globally. This position offers the autonomy to establish design processes and drive product decisions in a high-growth environment backed by strategic partnerships.

• Senior Product Designer
• Build product from zero
• Figma + AI tools
• Hybrid or remote

You will own the backend and Agent systems behind Trust Wallet's LLM products. Responsibilities include building multi-turn conversation systems, defining quality metrics, and ensuring reliability in production. The role requires shipping features to real users and proving impact through data.

• Lead AI Engineer
• Fully remote (Global)
• Golang + LLMs
• Web3 experience preferred

Join the growing support team at ClickHouse to deliver high-quality technical assistance to customers in Japan and across the APJ and EMEA regions. You will manage support tickets, assist with pre- and post-sales activities, and collaborate with engineering teams to improve service delivery. This customer-facing role includes occasional onsite visits and requires strong technical expertise in database systems.

• Senior level role
• Fully remote (Japan)
• Japanese + English
• ClickHouse + SQL

Join BJAK, a leading insurance and fintech platform in Southeast Asia, as an iOS Engineer. You will build native mobile experiences for spending, saving, and AI-assisted financial journeys. The team values clean user flows, performance, and product quality over status quo development.

• Fully remote (Japan only)
• Swift + SwiftUI
• AI Finance Agent
• Senior level expected

Join BJAK, Southeast Asia's leading insurance platform, as it expands into neobanking services. You will build clean, reliable mobile experiences for insurance, payments, and investments, working closely with product and design teams to turn complex journeys into usable apps. This position is ideal for developers who think like product builders and care deeply about user experience, performance, and reliability. You will own features end-to-end, from API integration to handling edge cases, ensuring high standards across the application.

• Hybrid (Japan)
• Android & iOS
• Kotlin / Swift
• 3+ years exp

Join Mimica, a Series B AI startup backed by Khosla Ventures, as a Staff or Lead Python Engineer. You will own the development of resilient backend applications that interface with proprietary ML models and GenAI integrations. This position offers the chance to be a founding member of the Maker Team or support the Data Intelligence Team, driving architecture and developer experience in a remote-first environment.

• Staff/Lead Level
• Fully Remote (Global)
• Python + FastAPI
• ML System Integration

White Circle builds the safety, reliability, and optimization layer for AI systems using natural-language policies. As DevRel Lead, you will own how technical audiences discover and adopt the platform, including the Halo open-source framework. You will bridge the gap between complex AI safety concepts and developer communities through content, events, and partnerships.

• Lead level role
• Fully remote (US hours)
• AI Safety focus
• Equity included

Join HOLYWATER TECH, a company blending human creativity with artificial intelligence to build entertainment products like My Drama and My Muse. You will create compelling posters for AI-generated romantic series, ensuring high visual quality and consistency across various styles including photorealism and anime.

• Fully remote or office
• Midjourney + Photoshop
• AI Art & Retouching
• 20 days vacation

Join the Developer Infrastructure team within Platform Engineering at Ava Labs. You will build durable infrastructure, tooling, and technical processes to help teams building the core Avalanche network ship code faster and with greater confidence. This is a hands-on engineering role where you will work directly in the codebase to reduce friction, automate workflows, and improve system reliability through better testing and observability.

• Staff level position
• Go and Rust
• Blockchain infrastructure
• CI/CD and testing focus

You will drive the strategy and execution of new trading products, working with engineering, design, and security teams. The goal is to deliver seamless, secure user experiences while iterating quickly based on data and market trends in the Web3 space.

• Senior Product Manager
• Fully remote globally
• Web3 & Crypto focus
• Trading growth strategy

Join the team building the Super Intelligence stack, including Colossus supercomputers and Grok models. As an AI Deployment Manager, you will own the post-sale journey for enterprise customers, ensuring successful rollouts of Grok, Grok Build, and other AI applications. You will partner with developers, administrators, and executives to shape rollout strategies and influence product roadmaps. Success is defined by customer retention, product adoption, and revenue growth within your portfolio.

• Fully remote (Japan)
• Enterprise AI focus
• Fluent Japanese required
• Customer-facing role

Join the team behind Flipper Zero to quality assure the new BUSY Bar, a smart productivity device. You will own test strategies for complex scenarios spanning firmware, backend systems, and mobile applications to ensure seamless interaction.

• Senior QA Engineer
• IoT & Embedded focus
• Fully remote worldwide
• Flexible work hours

Join HOLYWATER TECH to engineer AI-native platforms that redefine storytelling. You will design agent workflows that transform ideas into finished episodes without manual intervention, serving millions of users across products like My Drama and My Muse.

• AI Product Engineer
• TypeScript + Nest.js
• Agentic AI Architecture
• Remote or Office (UA)

You will shape and scale the Base360.ai platform by connecting user interfaces with backend systems for reservations, cleaning, and payments. Working closely with founders and operators, you will turn ambiguous customer problems into intuitive, reliable software solutions that automate manual work.

• Senior Full-Stack Role
• Fully remote worldwide
• Python + React stack
• AI & automation focus