Senior Software Engineer - Special Projects

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

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.

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

More Full-time Jobs

Show more

AI Product Lead

Full time
Remote
AI Product Lead — Portfolio Companies
Sirex Portfolio Companies
Salary: $160,000 – $225,000 USD base + equity
Location: Remote-first
About the role
Own product strategy and roadmap for AI-native products inside our portfolio (autonomous agents, AI devtools, RWA platforms). Bridge technical founders and go-to-market.
What you’ll do
•Define product vision and prioritization for AI agent platforms
•Work directly with engineering on agent architecture and user experience
•Run user research and go-to-market experiments
•Help portfolio companies ship from MVP to product-market fit
Requirements
•4+ years product experience (ideally in AI or Web3)
•Strong technical understanding of LLMs and agents
•Previous startup or VC portfolio experience
•Data-driven and execution-focused
What we offer
•Work across multiple exciting AI/Web3 companies
•Huge ownership and equity upside
•Direct mentorship from Sirex partners
Payment in Crypto
13,333-18,750
Monthly
See details

On-Chain AI Analyst / Data Scientist

Full time
Remote
On-Chain AI Analyst / Data Scientist
Sirex (Fund + Portfolio)
Salary: $145,000 – $200,000 USD base + equity
Location: Remote-first
About the role
Turn on-chain data into alpha for AI agents, DeFi protocols and RWA investments. Build dashboards, anomaly detection and predictive models using real-time blockchain data.
What you’ll do
•Develop on-chain analytics pipelines (The Graph, Dune, custom indexers)
•Build AI models that predict protocol TVL, agent activity and RWA flows
•Create internal tools for investment thesis validation
•Research and publish insights on autonomous agent behavior on-chain
Requirements
•Strong Python + SQL + data science background
•Deep experience with blockchain data (Dune, Flipside, custom subgraphs)
•Familiarity with LLMs and agent systems
•Previous crypto research or trading experience
What we offer
•Direct influence on fund investment decisions
•Access to proprietary on-chain datasets
•Fast-track to senior research roles
Payment in Crypto
12,083-16,667
Monthly
See details

RWA & Tokenization Protocol Engineer

Full time
Remote
Sirex Portfolio Companies
Salary: $155,000 – $220,000 USD base + equity + token package
Location: Remote-first
About the role
Build real-world asset tokenization protocols and compliant on-chain infrastructure for our RWA portfolio companies (real estate, carbon credits, invoices, treasuries).
What you’ll do
•Design and audit upgradeable smart contracts for RWA issuance, custody and compliance
•Implement cross-chain bridging, oracle integration and KYC/AML hooks
•Build tokenization SDKs and developer tools
•Work on regulatory-compliant mechanisms (ERC-3643, ERC-1400 style)
•Ship production protocols on Ethereum, Polygon, Arbitrum and Solana
Requirements
•4+ years Solidity + security experience (OpenZeppelin, audits)
•Deep knowledge of token standards and RWA primitives
•Experience with legal/compliance wrappers — strong plus
•Rust or Move experience is a bonus
What we offer
•Work on protocols that bring trillions in real-world value on-chain
•Direct collaboration with legal and regulatory partners
•High upside through protocol ownership and tokens
Payment in Crypto
12,917-18,333
Monthly
See details

Senior Rust Engineer — Decentralized AI Compute & GPU Orchestration

Full time
Remote
Senior Rust Engineer — Decentralized AI Compute & GPU Orchestration
Sirex Portfolio Companies
Salary: $170,000 – $240,000 USD base + meaningful equity + token package
Location: Remote-first (any timezone)
About the role
We’re building the next layer of decentralized compute for AI agents — GPU orchestration, libp2p networking, verifiable execution and on-chain coordination. Join one of our high-conviction portfolio companies or work directly with the Sirex infra team.
What you’ll do
•Design and ship production Rust services for distributed GPU clusters and agent orchestration
•Build libp2p + IPFS-based peer discovery and data exchange layers
•Implement verifiable compute primitives (zkML, TEE, or on-chain proofs)
•Optimize for cost, latency and fault tolerance at scale
•Collaborate with AI teams on autonomous agent deployment
Requirements
•4+ years Rust (production experience mandatory)
•Strong background in distributed systems, networking or blockchain infra
•Experience with libp2p, IPFS, GPU compute (CUDA/ROCm) or TEEs — big plus
•Deep understanding of AI agent workloads
What we offer
•Direct impact on core infrastructure that powers multiple portfolio companies
•Top-tier equity + token upside
•Fast growth to Staff/Principal level
•Work with the best AI + crypto teams in the space
Payment in Crypto
14,167-20,000
Monthly
See details

🚀 Hiring Solana Developers – Pump.fun

Montana City, USA
Montana City, USA
Full time
Remote
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
Payment in Crypto
13,000-20,000
Monthly
See details