Head of Commercial (Japanese Speaking)

About MentTech
MentTech is a forward-thinking technology company dedicated to transforming how mentoring and learning are delivered in the digital age. By combining advanced tools, intelligent systems, and a human-first approach, MentTech helps individuals, teams, and organizations harness the power of mentorship to unlock potential, build skills, and achieve lasting growth.
The Role
We are seeking a Smart Contract Developer responsible for ensuring that game listings within MentTech work properly and ensuring compliance with all game store policies.
Key Responsibilities:
 • Architect, implement, and deploy secure smart contracts for an on-chain Play-to-Earn GameFi ecosystem
 • Lead contract design decisions with a focus on robustness, auditability, gas efficiency, and resilience to attack vectors
 • Mentor/junior developers: perform code reviews, establish standards, best practices in security & testing
 • Collaborate cross-functionally with game designers, backend, QA, and security teams to align smart contract features with product roadmap
 
Qualifications:
 • 2+ years hands‐on experience developing & deploying smart contracts (Solidity / EVM or equivalent) in production environments
 • Track record of writing secure contracts, familiarity with common vulnerabilities (reentrancy, integer over/underflow, front-running, flash loans, etc.)
 • Experience with audits, formal verification, fuzz testing, or other advanced contract assurance methods
 • Strong test suite / CI workflow skills; comfortable using tools like Hardhat, Foundry, Truffle etc.
 • Solid understanding of GameFi mechanics and how on-chain economics work
 
Bonus Points:
 • Experience on multiple EVM chains or Layer-2 / sidechains
 • Knowledge of cross-chain bridges, oracles, NFTs, tokenomics design
 • Contributions to open-source security tooling or prior audit reports or published code you’re proud of
 
Why join MentTech?
At MentTech, we cultivate a culture of flexibility, autonomy, and the freedom to make a real impact on the broader Web3 ecosystem. Experience the advantages of a fully remote working environment where your expertise and contributions are rewarded with competitive compensation tailored to your role and project influence.
Ment Tech Labs
 • Employee Equity & Incentives: Unlock future growth with equity and other potential incentives.
 • Entrepreneurial Culture: Join a collaborative environment where we innovate together as partners.
 • Cutting-edge Innovation: Work at the forefront of gaming and blockchain.
 • Key Strategic Projects: Be part of transformative initiatives that are redefining the gaming landscape.
 • Remote Flexibility: Enjoy a truly flexible, fully remote work setup that supports your lifestyle.
 • Talented Team: Collaborate with a team of passionate, driven, and skilled professionals.
 • Community Impact: Contribute to the growth and success of the Web3 and gaming communities.
 • Flexible Payment Options: Receive payments in crypto or fiat, tailored to your preference.
 • Growth Opportunities: Access valuable learning experiences and development paths.
 
MentTech Labs, Inc. is an equal opportunities workplace that doesn’t discriminate based on race, ethnicity, gender, ancestry, national origin, religion, sex, sexual orientation, gender identity, age disability, veteran status, genetic information, marital status, or any other legally protected status.

About the Project:
We’re building a SocialFi platform combining real estate and DeFi. After launching our MVP, we’re now progressing to version 2.
 
Role:
Join our remote team to develop website, smart contracts, integrate blockchain features, and ensure platform security.
 
Responsibilities:
- Develop and deploy smart contracts on Ethereum or Layer 2.
- Integrate wallet connect and decentralized features.
- Collaborate and direct contribute with frontend/backend teams.
- Conduct security audits.
 
Requirements:
- Experience with React, Ethers.js, Web3.js.
- Familiarity with wallet extensions and DeFi protocols.
- Ability to fix errors within 1 hour during tests.
- Comfortable working independently in a remote setup.
 
Nice to Have:
- Knowledge of cross-chain protocols or cryptography.
- Experience in social finance or real estate blockchain projects.
 
Application:
Send your resume and Linkedin profile. Selected candidates will do a quick coding test.
 
Contact: contact@hubsai.net
 
Join us to help shape the future of SocialFi!
 

We are building a company and looking for people who want to grow with it
Open roles
- Marketer
- Business Developer
- Recruiter
- Advertiser
Requirements
- Clear natural English communication without translators or AI
- Professional fast and reliable
- Fluent in your native language
If you want to be part of something early and actually make an impact — reach out

We are looking for a Metaverse Developer to help build interactive virtual environments and immersive digital experiences. The role involves developing 3D worlds, integrating Web3 technologies, and working with modern tools for real-time applications.
You will work with Unity, WebGL, and blockchain technologies to create engaging metaverse features and optimize them for performance across different devices. The developer will collaborate with designers and backend engineers to deliver scalable and stable products.
Requirements include experience with Unity and C#, understanding of 3D development, Web3 or blockchain basics, and familiarity with Git and API integration. Experience with VR/AR, NFTs, or multiplayer systems is a plus.
We offer remote work, flexible hours, crypto payments, and the opportunity to build innovative metaverse products.

Solana Developer Needed – Pump.fun Style Platform (Starter Code Available)
 
Hi,
 
I’m reaching out from Valiant Solution LLC. We’re currently working with a U.S.-based client who is an experienced crypto professional and we’re looking for a skilled Solana developer to help build a platform similar to Pump.fun.
 
We already have a basic codebase from GitHub that the developer can start from, so the project will mainly involve customizing, improving, and completing the functionality rather than building everything from scratch.
 
Key requirements:
• Experience with Solana smart contracts (Rust / Anchor)
• Knowledge of token launch mechanics and bonding curves
• Experience with Solana Web3 integrations
• Ability to work with an existing codebase and extend it
 
If this sounds interesting, please reply with:
• Your Solana development experience
• Links to relevant projects or GitHub
• Your availability for a quick discussion
 
Looking forward to connecting.
 
Best regards,
Valiant Solution LLC