Backend Developer

株式会社withB

80-120万円[Monthly]
Remote5-10 Yrs ExpBachelorFreelance
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Remote Details

Open CountryJapan

Language RequirementsJapanese

This remote job is open to candidates in specific countries. Please confirm if you want to continue despite potential location restrictions

Job Description

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Description

Our company is a recruitment agency specializing in the Japanese WEB3, blockchain, and cryptocurrency industry. This job listing is for positions available with our client companies.


【Job Description】

As a Rust Engineer, you will be involved in the development and maintenance of our company's service network, responsible for building secure, scalable, and privacy-focused blockchain solutions.


【Specific Responsibilities】

・Design of Backend Architecture

 - Design and implement robust and scalable backend systems that handle transaction processing, block generation, and decentralization

 - Make appropriate architectural decisions from the perspectives of security, performance, and privacy

・Development and Maintenance

 - Develop and maintain nodes using Rust, implementing core functions such as transaction processing, block generation, and node decentralization

・Database Management

 - Integrate PostgreSQL to ensure secure and efficient data storage and retrieval

 - Ensure the performance and reliability of database operations within the node

・Security

 - Implement security processes that include detection and mitigation of potential vulnerabilities to enhance code safety

 - Implement secure access controls to the database to prevent unauthorized access

 - Conduct regular security audits to minimize risks of unauthorized access and data leaks

・Testing and Debugging

 - Perform thorough testing and debugging to ensure the stability and performance of distributed nodes

・Performance Optimization

 - Continuously monitor and improve the performance and scalability of nodes

 - Identify bottlenecks in the system and optimize as necessary


Scope of Job Description Changes: May change within the company's defined scope

【Required Skills and Experience】

- Extensive practical experience in backend development using Rust (familiarity with system-level programming is essential)

- Proven track record in designing and optimizing large-scale backend architectures

- Knowledge of database systems such as PostgreSQL (including query optimization and schema design)

- Experience in performance profiling and scalability enhancement

- Business-level proficiency in Japanese

Communication will primarily take place via chat, so reading and writing skills are sufficient.

- Experience working in Japan or with Japanese companies (understanding Japanese corporate culture and business manners)

- Candidates residing in Japan or available to work during Japanese daytime hours (JST)


【Preferred Skills and Experience】

- Experience in blockchain development or cryptographic technology

- Knowledge of distributed systems and network protocols

- In-depth expertise in cryptocurrency

- A deep understanding of cryptocurrencies, including technical aspects, protocols, and philosophies

- Insights into other protocols and philosophies

- Ability to understand, compare, and analyze various blockchain protocols and their ideological backgrounds

- Adaptability to crypto culture

- An affinity for and the ability to adapt to the culture, values, and philosophies of the cryptocurrency ecosystem

- Experience contributing to open-source projects

Working Hours:

Flextime System·コアタイムあり

Holidays and Work Styles:

Two-Day Weekends (Saturdays and Sundays Off)

Social Insurance:

No Insurance

Period of Contract:

Non-fixed

Passive Smoking Measures:

No Smoking Indoors

RustSQLblockchainbackendcryptocurrencycrypto
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Posted on 06 September 2025

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