Software engineer - blockchain Job at Randstad (Tokyo)

Senior Rust Software Engineer

Serokell is a fast-growing, fully remote software development company that works...

Location

Salary:

Not provided

Serokell

Expiration Date

Until further notice

Requirements

3+ years of experience with Rust
Solid knowledge of Rust’s basics: type system, generics, lifetimes, std, serde, logging, error handling, project organisation and structure
Extensive experience with Rust’s async ecosystem (tokio, futures, streams)
Experience writing and running unit tests, integration tests
Strong grasp of computer science fundamentals, including algorithms, data structures, and concurrent programming
Knowledge of computer networks: HTTP, TCP/IP stack, understanding of poll- and push-based data synchronisation models and their usage in modern service APIs
Fluent spoken and written English

Job Responsibility

Develop robust, scalable, and maintainable Rust applications, adhering to best practices and coding standards
Participate in code reviews, providing constructive feedback and ensuring code quality
Debug and resolve technical issues, identifying and implementing effective solutions

What we offer

Competitive salary
Attractive international projects
Participation in the leading world conferences
International teams and multicultural environment
Fully remote work and flexible working hours
Possibility to take days off whenever you need
Investment in your professional and career growth, which will correspond to wage growth
Mentoring and training
Therapy sessions to support your well-being
Opportunity to contribute to one of the functional programming industry’s leading blogs

Scala Backend Software Engineer, Senior / Lead

To sustain the company's growth, Ledger is looking for new talents. You will sta...

Location

France , Paris

Salary:

Not provided

Ledger

Expiration Date

Until further notice

Requirements

Experienced engineer and continuous learner with 6+ years of relevant engineering experience
2+ years of technical leadership experience, including effective communication of complex concepts and cross-team coordination to ship critical products
Advanced Scala proficiency
expert-level proficiency, and advanced mastery of a second backend language (e.g., Rust, Java, Python, PHP) is a plus
Excellent collaboration and communication skills
Experience collaborating closely with QA, product management, and key stakeholders to develop and deliver on a shared vision
Led development of complex, high-performance interactive browser applications, including architecture, infrastructure, and optimization
Experience with various web architecture patterns (e.g., Microservices, Event-Driven, P2P)
Ability to apply and adapt software engineering best practices to the engineering environment
Experience in the Web3 ecosystem and in a project involving blockchain fundamentals

Job Responsibility

Develop and maintain high-performance, resilient microservices and APIs to power Ledger's products, including integrations with staking, yield, DeFi services, and blockchain explorers
Contribute to the architecture, design, and implementation of scalable solutions, proactively identifying and addressing technical challenges
Ensure software quality through testing, documentation, and performance optimization, including monitoring and alerting systems
Enhance and maintain CI/CD pipelines to secure and streamline deployment workflows
Provide technical leadership and mentorship, collaborating across teams to deliver impactful projects and improve engineering standards
Drive innovation by identifying opportunities for improvement, contributing to a shared knowledge base, and participating in technical outreach
Manage projects effectively, respecting deadlines, priorities, and deliverables.

What we offer

Equity: Employees are the foundation of our success, and we award stock options so you can share in that success as we grow
Flexibility: A hybrid work policy
Social: Annual company outing for Ledgerdary Days, plus frequent social events, snacks and drinks
Medical: Comprehensive health insurance policy offering extensive medical, dental and vision care coverage
Well-being: Personal development, coaching & fitness with our dedicated partners
Vacation: Five weeks of paid leave per year, in addition to national holidays and rest & relaxation (RTT) days
High tech: Access to high performance office equipment and gadgets
Transport: Ledger reimburses part of your preferred means of transportation
Discounts: Employee discount on all our products.

Fulltime

Typescript Software Engineer

We are seeking a motivated and curious JavaScript/TypeScript developer to join o...

Location

France , Paris

Salary:

800.00 - 1500.00 EUR / Month

Ledger

Expiration Date

Until further notice

Requirements

Currently enrolled in a Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field
Strong programming skills in JavaScript or TypeScript, with experience in Node.js or React (from coursework or personal projects)
Eagerness to learn about blockchain, Web3, and modern software practices
Good communication and teamwork skills, with the ability to collaborate in a dynamic, fast-paced environment
Interest in software craftsmanship, writing maintainable, well-structured code and exploring functional programming concepts
Familiarity with agile workflows and openness to feedback and iteration

Job Responsibility

Contribute to blockchain integrations by helping integrate and maintain multiple protocols (EVM, Bitcoin, Solana, Polkadot, Cosmos, etc.) within the Ledger ecosystem
Build and improve connectivity solutions that allow Ledger products to interact seamlessly with the broader Web3 ecosystem (Wallet API, Wallet Connect, Dapp integrations)
Develop your engineering skills through hands-on work in JavaScript and TypeScript, using frameworks such as Node.js and React, while applying clean code and modular design principles
Collaborate with multidisciplinary teams, participating in agile ceremonies, code reviews, and cross-functional discussions to understand how software projects are delivered at scale
Learn blockchain from the inside, discovering how various protocols operate and connect with hardware wallets — no prior blockchain experience required, only curiosity

What we offer

Frequent social events, snacks and drinks
Transportation allowance to contribute to your preferred means of transportation
Meal allowance with Swile
1 day off for every full month of work, in addition to national holidays

Fulltime

Software Engineer Intern

As an E-commerce Engineer Intern on our team, you'll work across our e-commerce ...

Location

France , Paris

Salary:

Not provided

Ledger

Expiration Date

Until further notice

Requirements

Previous engineering experience
Excellent written and verbal communication skills
Someone who is adaptable, and willing to learn new skills and approaches
Fluency in English

Job Responsibility

Support in the creation of new features and functionalities, consistently elevating our customer experience and refining the core systems' overall productivity
Collaboratively test ideas on users with your team, harnessing feedback to refine and enhance our product
Support and work closely with the optimization team

What we offer

Flexibility: A hybrid work policy
Social: Frequent social events, snacks and drinks
High tech: Access to high performance office equipment and gadgets, including Apple products
Transport: Ledger reimburses 75% of your preferred means of transportation
Food: We offer lunch vouchers with Swile
Vacation: 1 day off for every full month worked

Parttime

Typescript Software Engineer

We’re a team of experts pushing the limits of what’s possible, united by our com...

Location

France , Paris

Salary:

800.00 - 1500.00 EUR / Month

Ledger

Expiration Date

Until further notice

Requirements

Currently enrolled in a Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field
Strong programming skills in JavaScript or TypeScript, with experience in Node.js or React (from coursework or personal projects)
Eagerness to learn about blockchain, Web3, and modern software practices
Good communication and teamwork skills, with the ability to collaborate in a dynamic, fast-paced environment
Interest in software craftsmanship, writing maintainable, well-structured code and exploring functional programming concepts
Familiarity with agile workflows and openness to feedback and iteration.

Job Responsibility

Contribute to blockchain integrations by helping integrate and maintain multiple protocols (EVM, Bitcoin, Solana, Polkadot, Cosmos, etc.) within the Ledger ecosystem
Build and improve connectivity solutions that allow Ledger products to interact seamlessly with the broader Web3 ecosystem (Wallet API, Wallet Connect, Dapp integrations)
Develop your engineering skills through hands-on work in JavaScript and TypeScript, using frameworks such as Node.js and React, while applying clean code and modular design principles
Collaborate with multidisciplinary teams, participating in agile ceremonies, code reviews, and cross-functional discussions to understand how software projects are delivered at scale
Learn blockchain from the inside, discovering how various protocols operate and connect with hardware wallets.

What we offer

Frequent social events, snacks and drinks
Transportation allowance
Lunch vouchers
1 day off for every full month of work, in addition to national holidays.

Fulltime

Staff Software Engineer - Devices interactions

Staff Software Engineer role focused on devices interactions, working on Ledger ...

Location

France , Paris

Salary:

Not provided

Ledger

Expiration Date

Until further notice

Requirements

Engineer profile with at least 8 years of experience in software development
Tech lead experience
Proficient with JavaScript and TypeScript
Strong background/interest in algorithm development and optimization
Excellent knowledge of React and hooks

Job Responsibility

Participate in modularization effort by contributing to Device Management Kit
Maintain and extend @ledgerhq/hw-transport-* libraries
Contribute to main Ledger's initiatives like 'Clear Sign all the things'
Contribute to 'My Ledger' section on Ledger Live application
Collaborate closely with other engineering teams like Firmware team
Help QA team automate testing approaches
Investigate bugs in blockchain edge cases

What we offer

Flexible work options - work from home up to 3 times per week
Health & Wellness support - Health and Life Insurance
Financial growth opportunities - employees can become shareholders
Commuter allowance
Learning & Development - comprehensive suite of training solutions

Fulltime

Lead Blockchain Engineer

We’re looking for a Blockchain Development Lead to join our Engineering team and...

Location

India , Noida

Salary:

Not provided

Taazaa Inc

Expiration Date

Until further notice

Requirements

5+ years of software development experience
2+ years in blockchain or distributed systems
Strong experience with Solidity, Rust, or Go for blockchain protocols or smart contract development
Hands-on experience with Ethereum, Hyperledger, Polygon, or Solana ecosystems
Deep understanding of cryptographic primitives, consensus algorithms, and decentralized architectures
Familiarity with web3 libraries, Node.js/TypeScript, and REST/gRPC API integration
Proven experience in leading teams, conducting code reviews, and mentoring developers

Job Responsibility

Architecture & Design: Lead the design of scalable, secure, and efficient blockchain systems (permissioned and public)
Technical Leadership: Mentor and guide developers on smart contracts, distributed ledger design, and cryptographic principles
Integration: Collaborate with backend, cloud, and data engineering teams to integrate blockchain components with existing SaaS architectures
Innovation: Evaluate emerging technologies (L2s, ZK proofs, stablecoins, cross-chain protocols) for use in real-world business applications
Quality & Security: Establish best practices for code reviews, audits, and on-chain security
Collaboration: Partner with cross-functional teams including Product Managers, Designers, and Data Scientists to prototype and deploy blockchain-powered features

What we offer

Continuous professional growth, offering workshops and training
Work-life balance with flexible hours and remote options
Competitive salaries
Health benefits
Various perks

Fulltime

Blockchain Engineer

Token Metrics is seeking a multi-talented Smart Contract Engineer to facilitate ...

Location

Salary:

Not provided

Token Metrics

Expiration Date

Until further notice

Requirements

3+ years of professional software engineering experience or equivalent blockchain/smart contract development experience
Proficiency developing in Solidity
familiarity with precompiles
Understanding of software engineering and security best practices, in particular smart contract security
Experience interacting with dapps/web3
Experience shipping and taking engineering projects to production.

Job Responsibility

Design, implement, test, and deploy EVM smart contracts
Work with external auditors to evaluate security and safety of smart contracts
Take engineering projects from concept and design to production, while working with engineering leaders and the product team to create sound and realistic roadmaps.

Fulltime

Software engineer - blockchain

Randstad

Location:
Japan , Tokyo

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
May 09, 2025

Expiration:
September 30, 2026

Looking for more opportunities? Search for other job offers that match your skills and interests.

Similar Jobs for Software engineer - blockchain

Senior Rust Software Engineer

Scala Backend Software Engineer, Senior / Lead

Typescript Software Engineer

Software Engineer Intern

Typescript Software Engineer

Staff Software Engineer - Devices interactions

Lead Blockchain Engineer

Blockchain Engineer

Software engineer - blockchain

Randstad

Location:Japan , Tokyo

Category:IT - Software Development

Contract Type:Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:May 09, 2025

Expiration:September 30, 2026

Looking for more opportunities? Search for other job offers that match your skills and interests.

Similar Jobs for Software engineer - blockchain

Senior Rust Software Engineer

Scala Backend Software Engineer, Senior / Lead

Typescript Software Engineer

Software Engineer Intern

Typescript Software Engineer

Staff Software Engineer - Devices interactions

Lead Blockchain Engineer

Blockchain Engineer

Location:
Japan , Tokyo

Category:
IT - Software Development

Contract Type:
Not provided

Job Posted:
May 09, 2025

Expiration:
September 30, 2026