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Uplers

Full Stack Engineer (Ruby On Rails & React/Vue)

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  • Posted 6 days ago
  • Be among the first 10 applicants
Early Applicant

Job Description

Experience: 5.00 + years

Salary: Confidential (based on experience)

Expected Notice Period: 15 Days

Shift: (GMT+09:00) Asia/Chita (YAKT)

Opportunity Type: Remote

Placement Type: Full Time Contract for 12 Months(40 hrs a week/160 hrs a month)

(*Note: This is a requirement for one of Uplers client - Social Chat Commerce Solution Provider)

What do you need for this opportunity

Must have skills required:

Go, Jotai, Recoil, Remix, Zustand, AI, backend architecture, C#, Cloud Server (Google / AWS), Next Js, NoSQL, PostgreSQL, Python, React Js, Ruby on Rails, Vue.js

Social Chat Commerce Solution Provider is Looking for:

#1 on ProductHunt. Over 10,000 AI agents generated worldwide within months of launch

The product has evolved WITH_REPLACED 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 are confident in the trajectory for global impact.

What We Do

We are revolutionizing sales 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_REPLACED zero setup required.

As a Full Stack Engineer

You will dive into global AI product development during our zero-to-one phase. You will work directly WITH_REPLACED our CEO and core team from Japan while building for global markets, experiencing AI-driven development WITH_REPLACED 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.

Your Typical Day WITH_REPLACED 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 Will Need


  • 5+ years building production software systems
  • 5+ years building scalable backend services in production environments WITH_REPLACED Go, plus working knowledge of Ruby on Rails. Equivalent experience WITH_REPLACED other backend technologies (Python, C#, Node.js, etc.) will also be considered
  • 3+ years building modern web applications WITH_REPLACED React or Vue
  • Experience WITH_REPLACED 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_REPLACED Rails BFF layer
  • Frontend: React WITH_REPLACED TypeScript
  • Data: PostgreSQL WITH_REPLACED Redis caching
  • Infrastructure: Cloud-native deployment WITH_REPLACED container orchestration
  • Development: GitHub-based workflows WITH_REPLACED 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_REPLACED 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_REPLACED 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_REPLACED 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

How to apply for this opportunity


  • Step 1: Click On Apply! And Register or Login on our portal.
  • Step 2: Complete the Screening Form & Upload updated Resume
  • Step 3: Increase your chances to get shortlisted & meet the client for the Interview!

About Uplers:


Our goal is to make hiring reliable, simple, and fast. Our role will be to help all our talents find and apply for relevant contractual onsite opportunities and progress in their career. We will support any grievances or challenges you may face during the engagement.

(Note: There are many more opportunities apart from this on the portal. Depending on the assessments you clear, you can apply for them as well).

So, if you are ready for a new challenge, a great work environment, and an opportunity to take your career to the next level, don't hesitate to apply today. We are waiting for you!

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About Company

Job ID: 143874635