Senior Frontend Developer (React)

Roles

We’re currently looking for a Senior Frontend developer (React) to join our fast-paced growing team. As part of the engineering team, you will be responsible for building cloud-security solutions used by thousands of enterprise companies. Our flagship product, HENNGE One, provides functionalities ranging from access control, email filtering, online storage, and email archiving. We focus on implementing state-of-the-art security functionalities, ensuring SLA 99.9% in distributed fault-tolerant deployment, and providing the best user experience to our customers.

Responsibilities

• Design, develop, and maintain innovative features based on business needs
• Bring our design system to life by implementing high-fidelity UI using a modern frontend framework
• Ensure high-quality deliverables through CI/CD pipelines, tests, and documentation
• Collaborate with Design, Product Management and Customer Success teams to continuously improve the product
• Support the team by actively participating in discussions and reviewing others’ code
• Improve team synergy and mentor junior engineers

Our Tech Stack

Each product team is free to choose their own tech stack. Each project uses Typescript as the base language, with a combination of these technologies:

React:

• Styled Components
• Redux (Toolkit)
• RxJS
• Jest/Testing Library
• Testcafe

For more information, you can also check our Stackshare page out.

Requirements

Minimum Qualifications

• 3+ years of web development experience, with at least 3+ years in React.
• Ability to write proper type-safe code with Typescript
• Ability to mentor junior engineers and work collaboratively in a team environment
• Ability to write robust tests along with your code
• Understand the importance of clean code and software documentation
• Business-level English (Japanese is NOT required)
• Interested in open source/tech community activities

Nice to have

• Degree in Computer Science or other related technical fields
• Experience with state management in a complex web app (e.g. Redux, Vuex)
• Familiarity with design collaboration tools like Figma
• Knowledge setting up build and test environments, CI/CD pipelines
• Knowledge of Unix-like environment
• Team leadership experience
• React: experience with Hooks, css-in-js libraries

Work style

Flexible working hours with core time.
Hybrid work environment with emphasis on in-office collaboration and the encouragement for employees to work onsite.

Benefits

• Language learning support (English/Japanese)
• English allowance and Advanced language expert allowance
• Insurance: Health, Employment, Industrial Injury, Welfare pension
• Employee Stock Ownership Plan
• Opportunities to attend international and domestic conferences
• Financial support for technical certifications and technical learning programs
• Office clubs to join: coffee club, board game club, karaoke club, language cafe club, etc.
• Transportation allowance (maximum of 35,000yen per month)

Reasons why you will enjoy working at HENNGE:

🌎 We Celebrate Diversity
Join a vibrant team from over 20 countries, united by a love for technology and Japanese culture. Located in Shibuya, Tokyo, we offer a dynamic, non-traditional work environment in one of the world's most exciting cities.

📍 Smooth Japan Relocation
We make your move to Japan smooth and stress-free. We provide comprehensive support such as flight itineraries and visa applications to ensure a smooth onboarding process for our new hires., ensuring a seamless transition and a warm welcome for all candidates.

🎉 Balanced Work Life
Work-life balance is highly valued at HENNGE, and lots of fun happens at our office! 200+ of social channels in our Slack, from weekly board game nights to snowboarding club, internal and seasonal events, monthly tech sessions with beer bashes, attendance of international tech conferences, and more. Employees have access to a flexible working hours system (with core working hours) to accommodate their preferred working style.

❤ Passion for Technology
Our CEO, also serving as CTO, actively leads product development, fostering an environment of innovation and support. Having a leader who truly understands and is still involved in the tech side of the business makes for an exciting and supportive environment for engineers.

🙌 Collaborative Teams
Work in autonomous teams where your decisions shape our services. Influence every aspect of our products, from UX and architecture to development and deployment, in an agile and collaborative setting.

Be part of a diverse and innovative team at HENNGE, where your passion for technology and desire to make a difference are valued and celebrated. Ready to change and challenge the status quo with us?

Selection Process

1. Register and solve our coding challenge from here. You will receive an email with our guidance upon your submission, and there is no time limit to finish the challenge.
2. Once you finish the coding challenge, follow the instructions to upload your CV and Cover Letter.
3. Casual interview with our HR
4. 2 (or 3) interviews with our engineers
5. Interview with our CEO