Senior Software Engineer - Special Projects
Circle, a pioneering financial technology company, is at the forefront of revolutionizing the movement of digital value across the globe efficiently and affordably. With a focus on modernizing payment systems through blockchain technology, particularly USDC, Circle enables businesses, institutions, and developers to leverage these advancements for economic growth and financial inclusion.
Overview:
At Circle, a culture of transparency and innovation underpins our remote workplace where teamwork and adaptability are key to success. Embracing core company values such as mindfulness and integrity, employees contribute to an environment that fosters collaboration and welcomes fresh ideas and diverse perspectives.
Key Responsibilities:
Seeking a skilled Smart Contract Engineer to join the USDC Smart Contract team at Circle, you will lead the development and scalability of smart contracts across multiple blockchain ecosystems. Responsibilities include designing, coding, testing, and deploying secure smart contracts while enhancing existing solutions for improved efficiency and safety. Implementing security practices and performance optimization methods is crucial, along with conducting risk assessments and devising strategies to enhance security on various blockchain platforms.
Requirements for Candidates:
Senior Software Engineer (III) Requirements:
Over 4 years of software development experience, inclusive of internships.
Demonstrated expertise in smart contract development on blockchain platforms for a minimum of 2 years.
Proficiency in programming languages like Rust, Go, or others commonly used for non-EVM smart contracts.
Experience with non-EVM blockchain ecosystems such as Cosmos or Solana.
Strong background in architecting, coding, testing, and deploying secure smart contracts.
Emphasis on security best practices and implementing measures to enhance security in smart contract development.
Up-to-date knowledge of trends and technologies in blockchain development.
Staff Software Engineer (IV) Requirements:
Over 7 years of software development experience, with a minimum of 4 years in smart contract development on blockchain platforms.
Proficiency in non-EVM programming languages and related tech stacks.
Deep understanding of various blockchain protocols and principles.
Ability to lead technical teams, mentor junior engineers, and collaborate effectively across departments.
Strong communication skills to facilitate collaboration and consensus building among team members and stakeholders.
Additional Info:
Eligible for day-one PERM sponsorship for qualified candidates. Flexible compensation ranges consider factors such as experience, qualifications, and business needs, with added benefits like equity, discretionary vacation, health benefits, and more.
Equal Opportunity Employer Statement:
Circle values diversity and promotes an inclusive workplace where all are welcome, without discrimination based on race, religion, nationality, gender, age, or disability status. Participating in the E-Verify Program when required by law reinforces our commitment to legal compliance and a fair work environment.
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Personal Assistant to Managing Partner
Kieran McLoughlin has navigated the highest levels of traditional finance as the former Head of the Central Bank of Ireland. Today, as Managing Partner at Astralis, he is at the frontier of Web3 investment. We are looking for a unique individual to bridge these two worlds: someone who understands the rigor of institutional finance but lives and breathes the decentralized future.
This isn't a traditional "admin" role. This is a high-bandwidth, high-stakes position for a Web3 native who can act as a technical filter, a marketing scout, and a strategic executor.
The Mission
Technical Intelligence: You are the "eyes" on-chain. You’ll be responsible for vetting protocols, testing dApps, and analyzing tokenomics. You should be able to break down a complex ZK-rollup or liquid staking architecture into a concise briefing.
Marketing & Alpha Hunting: You live on X (Twitter), Farcaster, and in closed Discord research groups. You identify emerging meta-narratives before they hit the mainstream. You understand why a community thrives and how a project builds its "moat" through marketing.
Strategic Operations: Managing the flow of a Managing Partner’s world. This includes coordinating with founders of top-tier Web3 projects, preparing materials for the Investment Committee, and ensuring Kieran’s digital and technical stack is always optimized.
Executive Presence: You will represent the office of the Managing Partner. You must be able to switch from degen-speak in a Telegram chat to professional discourse with institutional LPs.
The Profile (Who You Are)
On-Chain Native: You have a DeBank profile that tells a story. You’ve bridged, swapped, provided liquidity, and perhaps been "rugged" once or twice. You don’t just read about crypto; you use it daily.
Technical Literacy: You understand the difference between consensus layers and execution layers. You can read a smart contract (at least the basics) and understand the implications of governance proposals.
Marketing Intuition: You know what "good" looks like in Web3. You can distinguish between organic community growth and paid bot engagement.
Hyper-Organized: You are a master of calendars, task management, and information flow. You thrive in high-pressure environments where speed and accuracy are non-negotiable.
Discretion & Integrity: Working with an ex-regulator requires the highest level of ethics and confidentiality.
Why This Role?
Direct Mentorship: Work side-by-side with Kieran McLaughlin. This is a masterclass in macroeconomics, regulatory strategy, and venture capital.
Access: You will be in the room for the deals that will define the next cycle of Web3.
Impact: Your technical and marketing insights will directly inform the Investment Committee’s decisions.
How to Apply:
Standard CVs are fine, but we care more about your "proof of work." Along with your resume, send us:
A brief summary of your most interesting on-chain move or investment thesis.
Your X (Twitter) handle or your DeBank/Nansen profile link.
Skills
Analytical Thinking
Communications Skills
Crypto Revenue Management
Cryptocurrency
Tokenomics
Senior Web3 / Crypto Trading Platform Developer
Fullstack Developer Needed for Web3 Prediction Market Platform
We're looking for an experienced Blockchain / Full-Stack Developer to help build a production-ready MVP for a Web3 prediction marketplace.
We’ve already built a basic UI prototype using vibe coding. The goal now is to turn this prototype into a functional, scalable dApp with clean architecture and solid Web3 fundamentals.
This is not a tutorial or experimental project — We’re looking for someone who has real experience shipping blockchain/web3 products.
What You’ll Do
Review and improve an existing UI prototype
Build smart contract logic for a prediction marketplace MVP
Integrate blockchain functionality with the frontend
Develop backend / API logic as needed
Ensure clean, maintainable, production-ready code
Collaborate on product decisions and MVP scope
Tech Stack (Preferred)
Frontend: Next.js / React
Backend: Node.js
Blockchain: Solidity / Rust
Experience with non-EVM chains is a plus (open to discussion)
What We're Looking For
- Strong experience in Blockchain & Web3 development
- Proven ability to build production-ready dApps
- Proficiency in Next.js, React, and Node.js
- Experience designing and shipping MVPs
- Good communication and ability to work independently
Nice to Have
- Previous work on prediction markets, DeFi, or marketplaces
- Experience taking projects from prototype to launch
- Performance, security, and scalability mindset
How to Apply
Please include:
- A brief summary of your Web3 experience
- Links to previous dApps or blockchain projects
- Your preferred tech stack and availability
If you’re an expert in blockchain and Web3 and enjoy building real products from early prototypes, We’d love to hear from you.