Senior Software Engineer - Special Projects

Status
Seattle, USA
Full time
Remote
Compensation is not specified
Role
Software Engineer
Description

Circle is a pioneering financial technology company actively immersed in the advancement of the internet of money. Our focus lies in revolutionizing how value travels globally, almost instantaneously, and at reduced costs compared to traditional settlement systems. This revolutionary internet layer is shaping new payment possibilities, enhancing commerce, and influencing markets to foster global economic growth and bolster inclusivity. Our infrastructure, notably USDC, a blockchain-based dollar, empowers businesses, institutions, and developers to embrace these advancements and seize opportunities stemming from this pivotal fusion of money and technology.

About the Position:

Join our dynamic team at Circle as a proficient Senior/Staff Software Engineer dedicated to our USDC Smart Contract team. In this role, you will tactically lead the development and expansion of smart contracts for USDC across diverse blockchain protocols such as Ethereum, Solana, Cosmos, and more.

Key Responsibilities:

  • Design, develop, test, and deploy secure smart contracts to ensure smooth and protected transactions.
  • Upgrade existing smart contracts for increased efficiency, safety, and developer productivity.
  • Incorporate top-tier security practices and optimize performance.
  • Conduct risk evaluations concerning smart contract development on various blockchain platforms to identify vulnerabilities and implement appropriate protective measures for enhanced security and robustness.

Desired Skills and Experience:

Senior Software Engineer (III):

  • Over 4 years of professional software development experience, inclusive of internships.
  • More than 2 years of validated smart contract development experience on blockchain platforms.
  • Strong proficiency in programming languages used for non-EVM smart contracts like Rust, Go, and others.
  • Demonstrated expertise in at least one leading non-EVM blockchain ecosystem such as Cosmos or Solana.
  • Proven track record in designing, coding, testing, and deploying secure and efficient smart contracts.
  • Robust focus on implementing security best practices and integrating security measures in smart contract development.

Staff Software Engineer (IV) Requirements:

All criteria for a Senior Software Engineer with the following additions:

  • Over 7 years of professional software development experience, encompassing internships.
  • More than 4 years of established smart contract development expertise on blockchain platforms.
  • Exceptional knowledge of non-EVM programming languages and technology stacks.
  • Deep comprehension of blockchain principles and various blockchain and web3 protocols.
  • Ability to lead technical teams, provide mentorship to junior engineers, and collaborate effectively with cross-functional teams.
  • Effective communication skills to foster consensus-building within team members and stakeholders.

Additional Information:

  • The position welcomes day-one PERM sponsorship for eligible candidates.
  • Compensation is determined by factors like relevant experience, skill set, qualifications, and organizational requirements.

Com pensation Summaries:

  • Starting salaries for Senior Software Engineers range from $147,500 - $195,000 with an annual bonus target of 12.5%.
  • For Staff Software Engineers, base salaries range between $172,500 - $227,500 coupled with an annual bonus target of 15%.

Benefits and Discretionary Policy: Employees enjoy equity and benefits, including medical, dental, vision, and 401(k). Our discretionary vacation policy along with paid sick leave and holidays contribute to your work-life balance.

Diversity & Equality:

Circle values diversity and offers an equal opportunity workplace, fostering a culture where differences are embraced. We are committed to inclusivity and do not discriminate on the basis of various factors.

Stay innovative, challenge the status quo and redefine the future in financial technology with our empowered team at Circle!

Skills Required
Avatar
Circle
Company size
Not specified
Location
United States
Description
Not specified
Status

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Ассистент по проектам веб-разработки и веб-дизайна

Full time
Remote
Менеджер проектов – Веб и Крипто (Удалённо)
Мы ищем опытного менеджера проектов для управления проектами по веб-разработке и дизайну в сфере криптовалют.
Вы будете отвечать за полную реализацию проектов — от начала до сдачи, управляя собственной командой или координируя работу фрилансеров.
Обязанности:
Управление полным жизненным циклом проекта (планирование → сдача)
Координация разработчиков, дизайнеров и фрилансеров
Определение сроков, этапов и результатов
Обеспечение качества и своевременной сдачи проектов
Прямое взаимодействие с заказчиками
Требования:
Подтверждённый опыт управления веб-проектами
Умение работать самостоятельно или руководить командой
Опыт работы с фрилансерами
Сильные организационные и коммуникативные навыки
Базовое понимание криптовалют / Web3
Оплата:
От $3000 в месяц
Выплаты в криптовалюте (по желанию)
Долгосрочное сотрудничество
Мы предлагаем:
Полностью удалённую работу
Постоянный поток проектов
Возможность роста в сфере криптовалют
Важно:
Мы ищем человека, способного качественно и в срок реализовывать проекты «под ключ».
Payment in Crypto
3,000-5,000
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Assistant for web development and web design projects

Full time
Remote
Project Manager – Web & Crypto (Remote)
We are looking for an experienced Project Manager to manage web development and design
projects in the crypto space.
You will be responsible for delivering projects end-to-end, either by managing your own team or
coordinating freelance professionals.
Responsibilities:
- Manage full project lifecycle (planning → delivery)
- Coordinate developers, designers, and freelancers
- Define timelines, milestones, and deliverables
- Ensure quality and on-time delivery
- Communicate directly with stakeholders
Requirements:
- Proven experience in web project management
- Ability to work independently or lead a team
- Experience working with freelancers
- Strong organizational and communication skills
- Basic understanding of crypto / Web3
Compensation:
- Starting from $3000/month
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What we offer:
- Fully remote position
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- Opportunity to grow within the crypto space
Important:
We are looking for someone who can deliver complete turnkey projects with high quality and within
deadlines.
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3,000-5,000
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Startup

Chamoli Gopeshwar, India
Chamoli Gopeshwar, India
Part time
Office
Thank you for giving me the job. If I get a job in the future, I will get a chance to gain experience of working in the world. Thank you.
Payment in Crypto

Senior Software Engineer (Blockchain)

Mumbai, India +3
Mumbai, India +3
Full time
Remote
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.
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 • 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.
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Senior web3 engineer

Treynor, USA
Treynor, USA
Part time
Remote
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!
 
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