Full Stack Engineer

About the CompanyFounded in 2014, this innovative startup is on a mission to break down language barriers on the internet and enable people worldwide to access information in their native languages. Their SaaS products provide seamless multilingual and localization solutions, helping websites and mobile apps become accessible in up to 45 languages within minutes. Serving over 18,000 websites and apps, including many large enterprises expanding globally, they foster new innovations that enrich everyday life.English is the official language in the workplace, and the team includes many foreign employees.Job DescriptionJoin a fast-growing company that offers localization services for websites, mobile apps, and multimedia content. The role involves developing and enhancing SaaS solutions that automate multilingual site operations, translation, transcription, and localization workflows.You will work closely with cross-functional teams practicing the Large-Scale Scrum (LeSS) framework, in two-week sprints, focusing on quality, usability, and robust system performance. Collaboration happens primarily in-office to encourage real-time communication and teamwork, including mob programming and whiteboarding sessions.The company embraces AI technology integration in development workflows and values candidates eager to leverage these innovations.ResponsibilitiesDevelop and maintain web and mobile localization solutionsDesign and operate scalable databases (NoSQL/relational)Collaborate in cross-functional Agile teams following LeSS guidelinesEngage directly in customer observation, UX/UI design, and outcome validationContinuously learn and apply new technologies and methodsWork proactively to deliver and improve localization services with a full-stack mindsetRequired Qualifications3+ years development experience with web frameworks such as Ruby on RailsExperience designing and managing NoSQL or relational databasesStrong ownership and responsibility for project outcomesProficiency with AWS or other cloud platforms for development and deploymentInterest in languages and internationalization (i18n)Communication skills in EnglishWillingness to work in an Agile LeSS environmentCommitment to in-office collaborationOpenness to use AI tools in developmentPreferred QualificationsExperience with large systems development and securityKnowledge of algorithms, data structures, and testing (unit and end-to-end)Experience leveraging AI agents for software developmentBackground in customer observation and requirements analysisWork ConditionsFull-time regular employment with 3-month trial periodWork at office in Tokyo, no remote optionHealth insurance providedTransportation cost covered based on company policy60-minute daily break timeTech Stack HighlightsBackend: Ruby on Rails, Rust, Golang, PythonFrontend: Vue.js, TypeScript, React NativeMobile: Objective-C, Swift, JavaCloud: AWS, GCP, AzureCI/CD: GitHub Actions, CircleCI, JenkinsCollaboration Tools: Slack, Miro, Jira, Confluence, Figma