---
title: 'Senior Frontend Engineer at Jinba.io'
canonical: 'https://feeny.ai/job/senior-frontend-engineer-jinba-io-tokyo-hdmncde2yb6e'
type: 'job'
last_seen: '2026-09-07'
---

# Senior Frontend Engineer at Jinba.io

- **Company:** Jinba.io
- **Location:** Tokyo, Japan
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2025-12-14
- **Last confirmed live:** 2026-09-07
- **Apply:** https://jobs.ashbyhq.com/carnot-ai/fcdd1e5e-41c3-452f-8e31-a3dfa228aa6d

## Job description

## ABOUT THE ROLE

Senior frontend engineer who will own core product surfaces of Jinba's workflow automation platform. You'll build the interfaces where enterprise users create, visualize, and manage complex automations through natural language. This role is for someone who thrives on hard UI problems: real-time collaboration, canvas-based editors, and making AI feel predictable and trustworthy.

## RESPONSIBILITIES

- Build and own major product surfaces: workflow editor, execution monitoring, integration configuration
- Architect frontend systems that scale with product complexity and team growth
- Implement complex interactions: drag-and-drop, canvas manipulation, real-time updates
- Collaborate with design to ship polished, production-ready interfaces
- Improve developer experience: component patterns, testing strategies, build performance
- Mentor engineers and establish frontend best practices as the team grows

## REQUIREMENTS

## TECHNICAL SKILLS

- 5+ years of frontend engineering experience
- Expert-level React and TypeScript
- Deep understanding of state management patterns and when to apply them
- Experience with complex UI: canvas editors, rich text, drag-and-drop, or similar
- Strong CSS fundamentals; comfortable with Tailwind and modern styling approaches

## SYSTEMS THINKING

- Ability to architect frontend codebases that remain maintainable as they grow
- Experience with performance optimization: bundle size, rendering, perceived latency
- Understanding of accessibility standards and how to implement them practically
- Familiarity with testing strategies for complex interactive UIs

## PRODUCT SENSE

- Experience building developer tools, no-code platforms, or workflow products
- Ability to make technical decisions that improve user experience, not just code quality
- Comfort working directly with customers to understand pain points

## STRONG SIGNALS

- Frontend or full-stack roles at companies like Figma, Linear, Notion, Retool, Vercel, or similar
- Experience building canvas-based or node-graph editors
- Contributed to or maintained open-source component libraries
- Background at early-stage startups where you owned entire product surfaces
- Experience with real-time collaboration features (CRDTs, operational transforms, or WebSocket-heavy UIs)

## MINDSET

- Ownership-oriented: you want to own outcomes, not just ship tickets
- Quality bar: you care about polish, edge cases, and the details users notice
- Early-stage ready: comfortable with ambiguity and rapid iteration

## ABOUT JINBA

We help large enterprises build automated workflows using plain English. Unlike traditional no-code tools that bolt a chat agent onto their interface, Jinba is built as a native vibe coding platform from the ground up.

YC W26. International team across SF and Tokyo. Growing fast with major enterprise contracts.

## About Jinba.io

## Company Overview
- **One-liner**: Jinba provides an enterprise AI workflow builder that lets business teams create and deploy production-ready workflows using natural language, with SOC 2 compliance and on-premise deployment options.
- **Entity Type**: Private (Startup, Y Combinator Winter 2026 batch)
- **Headquarters**: San Francisco, USA (with an office in Tokyo, Japan)
- **Founded**: 2024 (estimated based on YC batch timing)
- **Founders**: Shoya Matsumori (Co-founder and CEO, Ph.D. in machine learning) and Takuya Norisugi (Co-founder and COO, former McKinsey manager)

## Core Business
- **Primary industry**: Enterprise AI Workflow Automation / No-code Development
- **Target customers**: B2B, specifically large enterprises in regulated industries (banking, insurance, financial services) and Fortune Global 500 companies
- **Mission or purpose statement**: Enable enterprises to build AI workflows just by chatting, eliminating the IT backlog and allowing business teams to deploy workflows to production with full compliance controls.

## Products & Services
- **Jinba Flow**: A vibe-coding platform where builders create and deploy workflows using natural language. Workflows can be reviewed and edited visually with flowcharts, integrated with 100+ external services, and published as APIs or batch processes.
- **Jinba App**: The execution environment where users run and interact with deployed workflows. Supports chat-based execution, auto-generated input forms, and MCP (Model Context Protocol) integration for AI agent access.
- **Jinba Toolbox (Beta)**: A centralized tool management and execution platform for AI agents, offering sandbox execution in containers, semver versioning, REST API/SDK/MCP support, and a centralized tool registry.
- **Jinba API**: Enables technical teams to build and deploy custom APIs in minutes without writing code, with 100+ integrations, SSO, RBAC, and audit logs.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed
- **Key Metric**: Total Funding — Y Combinator Winter 2026 batch (standard YC deal: ~$125K-$500K); serves 40,000 enterprise users at major financial institutions
- **Notable Investors/Partners**: Y Combinator (Winter 2026 batch); SOC 2 compliant; serves Fortune Global 500 companies in banking, insurance, and other highly regulated industries
- **Growth Signals**: 40,000 enterprise users; YC-backed with active hiring across engineering, sales, and design roles; expanding from San Francisco to Tokyo office; targeting highly regulated industries with compliance-first approach

## Competitive Advantages
- **Natural language workflow creation**: Unlike traditional no-code tools with drag-and-drop interfaces, Jinba lets users describe workflows in plain language, significantly reducing build time (promise of "Prompt to API in 5 minutes")
- **Enterprise-grade security from day one**: SOC 2 compliant with end-to-end encryption, SSO, RBAC, audit logging, on-premise or private cloud hosting, and private model hosting — designed specifically for regulated industries
- **Dual product ecosystem**: Jinba Flow for builders and Jinba App for consumers, with MCP integration allowing AI agents to access workflows
- **Targeting regulated industries**: Built specifically for banks, insurers, and compliance-heavy enterprises that competitors like Zapier, Make, and n8n cannot adequately serve due to security gaps

## Strategic Focus
- **Deep enterprise penetration**: Focused on Fortune Global 500 companies in banking, insurance, and regulated sectors
- **Security and compliance leadership**: Emphasizing on-premise deployment, private model hosting, and SOC 2 compliance as core differentiators
- **AI-native workflow automation**: Positioning as "Lovable meets n8n, but built for the enterprise" — combining vibe-coding with production-ready deployment
- **Global expansion**: Hiring across San Francisco and Tokyo offices, suggesting dual-market strategy (US and Japan)

## Why Work Here
- **YC-backed startup**: Winter 2026 batch with strong founder backgrounds (Ph.D. in ML, McKinsey) and rapid traction (40,000 users)
- **High-impact roles**: Open positions include Founding Engineer, Founding Sales Lead, Chief of Staff, Forward Deployed Engineer, and Founding Design Engineer — offering early-stage ownership and equity
- **Hybrid/remote flexibility**: Roles listed as "On-site" (San Francisco), "Hybrid" (San Francisco and Tokyo), and "Contract Hybrid" — suggesting flexibility depending on role
- **Competitive compensation**: Salary ranges listed for some roles (e.g., $150K-$250K for Founding Engineer roles)
- **Engineering culture**: Emphasis on "making something people want" and "building with AI" — strong technical culture with modern stack
- **Dual-location optionality**: Offices in San Francisco and Tokyo allow for international work opportunities

## Sources
1. [jinba.io](https://jinba.io/)
2. [jinba.io/careers](https://jinba.io/careers)
3. [ycombinator.com/companies/jinba](https://www.ycombinator.com/companies/jinba)
4. [carnot.mintlify.app](https://carnot.mintlify.app/en/introduction)
5. [jinba.io/api](https://jinba.io/api)

## Other roles at Jinba.io

- [Product Designer](https://feeny.ai/job/product-designer-jinba-io-san-francisco-4w6msjxm2k2e) — San Francisco, CA
- [Senior Engineer (Growth)](https://feeny.ai/job/senior-engineer-growth-jinba-io-san-francisco-mh1wg1y61ayg) — San Francisco, CA
- [Chief of Staff](https://feeny.ai/job/chief-of-staff-jinba-io-san-francisco-psd7excg2eq7) — San Francisco, CA
- [Founding Design Engineer](https://feeny.ai/job/founding-design-engineer-jinba-io-san-francisco-bbkdpv2jegk3) — San Francisco, CA
- [Founding Sales Lead](https://feeny.ai/job/founding-sales-lead-jinba-io-tokyo-pxhsbxegn01f) — Tokyo, Japan
- [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-jinba-io-san-francisco-vsgqka85mm5x) — San Francisco, CA
- [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-jinba-io-tokyo-5jb1hzzpphdc) — Tokyo, Japan
- [Founding Engineer](https://feeny.ai/job/founding-engineer-jinba-io-san-francisco-bdssfg0pnv08) — San Francisco, CA
- [Senior Frontend Engineer](https://feeny.ai/job/senior-frontend-engineer-clickup-canada-wdg2khrtx2jh) — Canada
- [Senior Frontend Engineer](https://feeny.ai/job/senior-frontend-engineer-clickup-united-states-n7etqt0n37xk) — United States