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Job ID : 1603324 Date Updated : July 22nd, 2026

English Speaking Frontend Developer

Hiring Company Security Startup Company
Location Tokyo - 23 Wards, Shibuya-ku
Job Type Permanent Full-time
Salary 5 million yen ~ 9 million yen

Work Style

Casual Clothing Flex Time

Job Description

Alchemista Labs is developing next-generation software that enables enterprise R&D teams to transform raw experimental data into structured, analysis-ready datasets.

As a Front-end Engineer, you will design and build intuitive user interfaces that simplify complex scientific workflows and large-scale data operations.

You'll work in a small, highly autonomous engineering team using modern technologies including React 19, TypeScript, OpenAPI-generated clients, and end-to-end testing.

Responsibilities

  • Develop front-end features for the Alchemista Labs platform
  • Build interfaces for transforming raw experimental data into structured datasets
  • Develop spreadsheet-level editable data grids
  • Implement drag-and-drop dataset creation workflows
  • Design intuitive user experiences for complex workflows
  • Collaborate closely with backend engineers, product managers, and designers
  • Lead frontend architecture and technical decision-making in a small engineering team
  • Maintain high-quality, maintainable, and scalable frontend code

Tech Stack

  • Frontend: JavaScript (VueJS, ReactJS)
  • Backend APIs: RESTful architecture
  • Cloud: AWS
  • Security: Confidential computing, data encryption, AI inference over encrypted data

 

General Requirements

Minimum Experience Level Over 3 years
Career Level Mid Career
Minimum English Level Business Level (Amount Used: English Only)
Minimum Japanese Level None
Minimum Education Level High-School
Visa Status Permission to work in Japan required

Required Skills

Required Qualifications

  • At least 2 years of professional software development experience
  • Experience integrating with RESTful APIs
  • Professional experience using React or Vue.js
  • Experience developing UI with component libraries or design systems such as:
    • Chakra UI
    • Material UI (MUI)
  • Strong interest in Artificial Intelligence and Privacy-Enhancing Technologies (Secure Computation)
  • Business-level English proficiency
  • Currently residing in Japan, or previously lived in Japan with confirmed plans to relocate

Preferred Qualifications

  • Experience developing and operating SaaS products on AWS
  • Experience building products from scratch (0→1 product development)
  • Experience developing sophisticated data-driven interfaces such as:
    • Editable grids and tables
    • Drag-and-drop interfaces
    • Complex form-based applications
  • Business-level Japanese proficiency

Ideal Candidate

We are looking for someone who:

  • Enjoys solving complex UX challenges through elegant interface design
  • Thrives in a small, fast-moving engineering team with significant ownership
  • Has a strong passion for AI, secure computation, and emerging technologies
  • Is proactive, collaborative, and comfortable taking initiative

 

Job Location

  • Tokyo - 23 Wards, Shibuya-ku

Work Conditions

Job Type Permanent Full-time
Salary 5 million yen ~ 9 million yen
Work Hours 10:00-19:00 Full flex time system (no core time)
Industry Internet, Web Services

Job Category

Company Details

Company Type Small/Medium Company (300 employees or less)
Non-Japanese Ratio Majority Japanese