SORAMITSU is the developer of and major contributor to the open-source blockchain platform Hyperledger Iroha, which is tailored for enterprise and public-sector use. Hyperledger Iroha, a project of Hyperledger Foundation, part of the Linux Foundation, has a permissions system that is scalable and performant.

Utilizing blockchain, SORAMITSU has developed a digital currency for the National Bank of Cambodia, a CBDC Proof-of-Concept with the Bank of the Lao PDR, a closed-loop payment system for the University of Aizu in Japan, an identity verification system prototype for Bank Central Asia in Indonesia, we were finalists in the Monetary Authority of Singapore CBDC Challenge, and are currently participating in Asia-Pacific's first proof-of-concept test of a cross-border, multi-currency security settlement system using distributed ledger technology with the Asian Development Bank. We have also conducted proof-of-concept tests for several major Japanese enterprises, and are active contributors to open source projects, such as Klaytn, South Korea's leading Layer-1 blockchain, KAGOME, the C++ Polkadot Host implementation, the SORA crypto-economic system, the Polkaswap DEX, and the DeFi wallet, Fearless Wallet

Based on these experiences, SORAMITSU aims to deploy cutting-edge technology on a global level in order to expedite financial inclusion and health, mitigate economic inefficiencies, and contribute to the fulfilment of the Sustainable Development Goals.

You can find out more by visiting our homepage at soramitsu.co.jp or check out our Twitter profile.

We are seeking a highly skilled blockchain developer with deep expertise in blockchain technologies and smart contract development, focusing on Solidity, Ethereum, and various Layer 1 and Layer 2 protocols. This role will involve designing, implementing, and optimizing secure and scalable blockchain solutions.

You will be responsible for:

• Develop, deploy, and maintain secure, efficient, and scalable smart contracts on Ethereum and other blockchain networks.
• Architect decentralized systems and define smart contract standards for new projects and features.
• Lead code reviews and provide mentorship to junior and mid-level developers.Optimize smart contract code for gas efficiency, performance, and security.
• Collaborate with cross-functional teams including frontend developers, product managers, and security experts.Identify and mitigate security risks within smart contracts.
• Stay up-to-date with the latest trends, tools, and best practices in Solidity and blockchain development.
• Perform rigorous testing and auditing of contracts, and ensure all code is secure and bug-free.

Requirements:

• 3+ years working specifically with Solidity and Ethereum-based development.
• Deep understanding of Ethereum's architecture, smart contracts, and related technologies.
• Proficient in Solidity, Web3.js, and Ethers.js.Experience with deploying and interacting with smart contracts on Ethereum, Binance Smart Chain, or other EVM-compatible blockchains.
• Familiarity with common design patterns (e.g., ERC-20, ERC-721, ERC-1155) and decentralized protocols.Expertise in smart contract security practices, including common vulnerabilities (e.g., reentrancy, overflow/underflow, front-running).
• Knowledge of decentralized finance (DeFi) protocols and their smart contract ecosystems.
• Experience with testing frameworks (e.g., Truffle, Hardhat, Foundry).
• Experience with CI/CD pipelines and blockchain-specific deployment strategies.
• Ability to communicate complex technical concepts effectively to both technical and non-technical stakeholders.
• Strong problem-solving, debugging, and optimization skills.
  Preferred:
• Experience in developing for Layer 2 networks or alternative blockchain protocols (e.g., Optimism, Arbitrum, Polygon).
• Familiarity with cross-chain technologies and bridging protocols.
• Experience with smart contract auditing tools like Slither, MythX, and others
• Experience with Polkadot ecosystem (Rust, Substrate)

General Skills:

• Programming Languages: Solidity, JavaScript, Python, with knowledge of Rust considered a plus.
• Blockchain Platforms: Ethereum, Binance Smart Chain, Polygon, Arbitrum, Optimism, etc.
• Frameworks & Libraries: Truffle, Hardhat, Foundry, Web3.js, Ethers.js.
• Security Best Practices: Smart contract auditing, vulnerability mitigation, best practices for gas optimization.
• Collaboration Tools: Git, GitHub/GitLab, JIRA, Slack, etc.
• Soft Skills: Strong communication in English, problem-solving, and analytical thinking.

Additional Requirements:

• Please include a link to your GitHub profile showcasing examples of your code or repositories where you’ve contributed.

What we offer:

• A relaxed remote-first (work from anywhere) work environment with flexible working hours
• A permanent, full-time role with a rapidly growing international team of professionals
• An educational budget to support your continued growth and development
• Opportunities to attend global meetups and conferences for learning and/or speaking engagements
• An opportunity to be a part of an award-winning team designing a better world through decentralized technologies

This is a remote position. Our distributed team is mostly spread across Europe and Asia. Team meetings are held generally during European working hours, and it is expected that you would adapt if necessary and be available accordingly.

If you have the required qualifications and are passionate about the Web3 industry, we encourage you to apply for this exciting opportunity.

SORAMITSU values diversity and is committed to providing equal opportunities for all applicants and employees. Our employment decisions, such as hiring, promotion, discipline, and termination, are based solely on an individual's qualifications, performance, and business needs. We do not discriminate against anyone on the basis of their race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, veteran status, or any other protected status under federal, state, or local law.

Apply Now:

Hegemony Labs is looking for a Senior Frontend Engineer to develop a feature rich, intuitive user interface that effectively encompasses our automated trading protocol. Collaborating and clearly communicating with our development team to deliver a thoroughly tested and well-architected product is essential. We seek a self-motivated individual who is extremely detail-oriented, passionate about streamlining user experience, and able to adapt to the dynamics of a fast-paced startup environment. The ideal candidate must effectively navigate complexity, embrace challenges as if they are opportunities for growth, and persevere through troublesome tasks to drive the project forward.

Requirements:

• 4-5 years of professional experience with JavaScript frameworks such as React & Nextjs
• Proven experience in frontend development with strong skills in JavaScript, HTML, and CSS.
• Familiarity with blockchain libraries and tooling such as WAGMI and Ethers.js
• A strong track record of collaborating with designers to build sophisticated design systems
• Proven experience developing responsive, high-performance apps for both mobile and desktop platforms
• Strong web design sense and an understanding of user experience fundamentals.
• Fluency in English (both written and verbal).

Good to Have:

• Familiarity with the complete web stack, including protocols and web server optimization techniques.
• Experience building Telegram integrated front ends and/or mini apps

Key Roles:

• Utilize web technologies (React, TypeScript, HTML, CSS) to create MVPs and run experiments that validate ideas, iterating rapidly and adopting new tools as necessary.
• Development of user-facing applications that incorporate complex feature sets, including control panels for trade automation, position dashboards, trading strategy libraries, governance platforms, and various other sub menus.
• Work with the founding team to conceptually iterate, tailor fit, and troubleshoot the unique concepts, capabilities, and vision of the project within prototype front-ends.
• Plan and discuss with QA team to ensure optimal prioritization of bug fixes and feature additions.
• Keep detailed notes about issues, necessary updates, and key concepts presented during development meetings.
• Design, develop, test, deploy, maintain, and enhance software.
• Introduce innovative ideas and technologies into our platform, driving continuous improvement.
• Ensure security, performance, and accessibility are built into the core of everything you develop.
• Guide the team on browser support, integration testing, and performance optimization.
• Mentor junior frontend developers on proven methodologies, best practices, and industry conventions.

Who we are:

Hegemony Labs is an ambitious startup composed of DeFi natives, trend analysts, and technical experts. We are dedicated to delivering bleeding edge trading innovations for the betterment of Web3 at large. Funded and backed by notable VCs and angels.

What we are building:

Hedgemony is an intent-centric execution layer which blends multilayered aggregation services with AI-driven market insights to provide an enriched and unified on-chain experience. Our primary aim is to simplify DeFi interactions and empower traders with unmatched on-chain trading functionalities.

We deliver simultaneous asset swaps, multi faceted yield capture, copy trading, and hedging optionality through our infinitely customizable strategy agents. Users can configure agents to navigate DEXs, lending, yield-bearing protocols, and other derivatives synchronously via conditional triggers and adaptive logic. With one simple action, entire portfolios can be revamped, redelegated, and programmed to automatically rebalance in accordance to shifting market sentiments.

The protocol MVP is currently deployed on Arbitrum One, and currently working towards multi-chain expansion and integration for crosschain settlement compatibilities on Base, Monad, HyperEVM and beyond.

Additional Info:

• Website
• Docs

How to Apply:

Send us an email at email. Please include your name, resume or CV, three professional references, and a concise statement about what distinguishes you and why you would be a great addition to our team.

Apply Now:

The Autonomys Network (formerly, Subspace Labs)

Autonomys is an early-stage, venture-backed startup pioneering a new category at the intersection of AI and Web3. With our upcoming mainnet launch this year, the Autonomys Network is a radically decentralized, next-generation layer one blockchain powered by an innovative proof-of-archival storage (PoAS) consensus mechanism. Our project serves as a foundation for global collaboration between humans and AI, ushering in a new era of possibilities. The Subspace Protocol is based on original research funded by the US National Science Foundation.

To learn more, visit our Website and read the technical whitepaper.

In this role, you will…

• Build user flows across both web and backend (React and Node).
• Integrate directly with other blockchain networks using native RPCs.
• Collaborate with Product, Design, and Engineering to define, prioritize, and build features for Web3 users.
• Drive detailed project definition and cross-functional alignment.

Key Requirements:

• 3+ years of experience building open-source code that is clean, maintainable, and well-tested, for production networks at scale.
• 2+ years of experience working with Typescript and Node.js.
• 2+ years of experience of experience with Ethers/Web3.js or Polkadot.js.
• 2+ years of experience working with React.js.
• A passion for decentralized, peer-to-peer systems and Web3 technologies.

Preferred Skills:

• Familiarity with Substrate and the Polkadot ecosystem.
• Familiarity with Next.js, Tailwind CSS and other modern frontend frameworks.
• Experience with SubQuery data indexing and querying framework.
• Experience building developer SDKs and internal tools.
• Experience developing AI tools, including Retrieval-Augmented Generation (RAG) systems, AI agents, and custom chatbots.
• Experience integrating smart contracts with frontend.
• Theoretical knowledge of blockchains and distributed systems.

What We Offer

• The ability to work from anywhere in the world
• A competitive salary with generous equity and token grants
• Medical, dental, and vision insurance (US-based only)
• A unique opportunity to shape the future of the internet
• Team off-sites in various locations around the globe

Apply Now: