Senior Software Engineer - Special Projects
Status
Atlanta, USA
Full time
Remote
Compensation is not specified
Role
Software Engineer
Description
About the Company:
Circle is a company in the financial technology sector advancing the internet of money. They enable the seamless global transfer of value like digital data with significant cost and speed benefits over traditional settlement systems. Through innovations like USDC, a blockchain-based dollar, Circle supports businesses, institutions, and developers in leveraging these advancements to move the digital economy forward.
About the Team:
Circle fosters a culture of transparency and stability as they expand into strong global markets. Operating under core values of Multistakeholder, Mindfulness, Excellence, and Integrity, the organization empowers employees to thrive in a remote setting where collaboration drives success. Circles promotes a flexible and inclusive work environment that welcomes new ideas and values every contributor.
Key Responsibilities:
Joining the USDC Smart Contract team, you will be tasked with developing and scaling smart contracts for USDC across diverse blockchain protocols such as Ethereum, Solana, and Cosmos. As a Senior/Staff Software Engineer, your role will involve leading the technical aspects of smart contract implementation.
Primary Duties:
- Design, construct, test, and deploy smart contracts to ensure secure and efficient transactions.
- Improve existing smart contracts to enhance developer productivity, safety, and overall effectiveness.
- Implement security protocols and optimization strategies to uphold best practices.
- Conduct risk assessments and devise mitigation plans to fortify the security and resilience of smart contracts on varied blockchain networks.
Requirements:
Senior Software Engineer (III)
- 4+ years of professional software development experience with focus on internships.
- 2+ years of proven expertise in smart contract development on blockchain platforms.
- Proficiency in non-EVM languages like Rust or Go for smart contract programming.
- Demonstrated skill in architecting, coding, testing, and deploying secure smart contracts.
- Strong knowledge of security practices and successful implementation in smart contract development.
- Passion for staying up-to-date with blockchain trends to drive innovation.
- Excellent problem-solving abilities and analytical mindset for addressing challenges in smart contract development.
- Ability to conduct independent research and offer innovative solutions.
Staff Software Engineer (IV)
All the requisites of a Senior Software Engineer with:
- 7+ years of professional software development experience, including internships.
- 4+ years of practical experience in smart contract development on blockchain networks.
- Proficiency in non-EVM languages and tech stacks.
- Profound understanding of blockchain principles and protocols in web3 ecosystems.
- Strong leadership skills to guide technical teams, mentor junior developers, and collaborate effectively across departments.
- Effective communication skills for team consensus and stakeholder management.
Additional Information:
This role may qualify for immediate PERM sponsorship for eligible candidates.
Circle offers competitive compensation packages tailored to factors like experience, skill set, and business needs, giving consideration to a diversity of elements.
Compensation Scales:
Senior Software Engineer (III)
- Base Pay Range: $147,500 - $195,000
- Annual Bonus Target: 12.5%
Staff Software Engineer (IV)
- Base Pay Range: $172,500 - $227,500
- Annual Bonus Target: 15%
Employees receive equity and benefits including medical, dental, vision, and 401(k) plans. Circle offers a flexible vacation policy and provides paid sick leave and holidays in the U.S.
Circle is an equal opportunity employer that values inclusivity and diversity, promoting a workplace free of discrimination based on traits like race, religion, gender, or veteran status. Compliance with the E-Verify Program is upheld in certain locations as necessitated by regulations.
Skills Required
Circle
Website
www.circle.comCompany size
Not specified
Location
United States
Description
Not specified
Status
SADR B
Sales Partner / Business Developer Needed for Oferli (Commission & Revenue Share)
Remote, USA
Remote, USA
Part time
Remote
Description:
Oferli is officially launched and scaling rapidly. We are looking for a results-driven Sales Partner / Business Developer to drive client outreach and secure project acquisitions.
What we offer:
Performance-based model (Competitive revenue sharing structure).
Direct collaboration with executive leadership and technical teams.
A fast-growing digital business environment.
Requirements:
Proven experience in B2B sales, client outreach, and deal closing.
Strong communication skills (English required).
Ability to deliver consistent results and manage outreach pipelines efficiently.
If you are Pro for results and ready to scale with us, apply with your recent closed deals or portfolio.
Oferli is officially launched and scaling rapidly. We are looking for a results-driven Sales Partner / Business Developer to drive client outreach and secure project acquisitions.
What we offer:
Performance-based model (Competitive revenue sharing structure).
Direct collaboration with executive leadership and technical teams.
A fast-growing digital business environment.
Requirements:
Proven experience in B2B sales, client outreach, and deal closing.
Strong communication skills (English required).
Ability to deliver consistent results and manage outreach pipelines efficiently.
If you are Pro for results and ready to scale with us, apply with your recent closed deals or portfolio.
Payment in Crypto
Adrian Cole
Project Manager — Web3 / SaaS
Remote, USA
Remote, USA
Full time
Remote
About WalletFunnel
WalletFunnel is a Web3 analytics and attribution platform built to help crypto projects understand which marketing channels, campaigns, and influencers actually generate valuable on-chain users.
We connect marketing activity with wallet actions such as wallet connections, deposits, transactions, volume, revenue, and ROI.
About the Role
We are looking for a proactive Project Manager to join WalletFunnel and help coordinate product development, marketing, operations, and communication between team members.
You will work closely with developers, designers, marketing specialists, and management to keep projects organized, deadlines clear, and execution moving forward.
Responsibilities
• Plan and manage projects from idea to launch
• Create tasks, milestones, priorities, and deadlines
• Coordinate developers, designers, marketing, and other team members
• Track progress and identify blockers before they become problems
• Organize workflows using project management tools
• Help improve internal processes and team communication
• Prepare clear project updates and reports
• Make sure deliverables meet requirements and deadlines
• Participate in product planning and feature prioritization
• Help coordinate external contractors and partners when required
Requirements
• 1–3+ years of experience in project management, operations, or a similar role
• Strong organizational and communication skills
• Experience working with remote teams
• Ability to manage multiple tasks and priorities simultaneously
• Understanding of Agile workflows and task management
• Comfortable working with developers and technical teams
• Strong written English
• Independent, proactive, and able to take ownership
Nice to Have
• Previous experience in Web3, crypto, SaaS, fintech, or analytics products
• Basic understanding of blockchain, wallets, DeFi, or crypto marketing
• Experience with startup environments
• Experience working with distributed international teams
What We Offer
• Fully remote position
• Flexible working environment
• Opportunity to work on an early-stage Web3 product
• Direct communication with the founding team
• Opportunity to influence product development and internal processes
• Competitive compensation based on experience
We are looking for someone who does more than simply track tasks. We want a Project Manager who can take ownership, communicate clearly, identify problems early, and help the team move faster.
If this sounds like you, apply with a short introduction about your experience and tell us about one project you managed from planning through delivery
WalletFunnel is a Web3 analytics and attribution platform built to help crypto projects understand which marketing channels, campaigns, and influencers actually generate valuable on-chain users.
We connect marketing activity with wallet actions such as wallet connections, deposits, transactions, volume, revenue, and ROI.
About the Role
We are looking for a proactive Project Manager to join WalletFunnel and help coordinate product development, marketing, operations, and communication between team members.
You will work closely with developers, designers, marketing specialists, and management to keep projects organized, deadlines clear, and execution moving forward.
Responsibilities
• Plan and manage projects from idea to launch
• Create tasks, milestones, priorities, and deadlines
• Coordinate developers, designers, marketing, and other team members
• Track progress and identify blockers before they become problems
• Organize workflows using project management tools
• Help improve internal processes and team communication
• Prepare clear project updates and reports
• Make sure deliverables meet requirements and deadlines
• Participate in product planning and feature prioritization
• Help coordinate external contractors and partners when required
Requirements
• 1–3+ years of experience in project management, operations, or a similar role
• Strong organizational and communication skills
• Experience working with remote teams
• Ability to manage multiple tasks and priorities simultaneously
• Understanding of Agile workflows and task management
• Comfortable working with developers and technical teams
• Strong written English
• Independent, proactive, and able to take ownership
Nice to Have
• Previous experience in Web3, crypto, SaaS, fintech, or analytics products
• Basic understanding of blockchain, wallets, DeFi, or crypto marketing
• Experience with startup environments
• Experience working with distributed international teams
What We Offer
• Fully remote position
• Flexible working environment
• Opportunity to work on an early-stage Web3 product
• Direct communication with the founding team
• Opportunity to influence product development and internal processes
• Competitive compensation based on experience
We are looking for someone who does more than simply track tasks. We want a Project Manager who can take ownership, communicate clearly, identify problems early, and help the team move faster.
If this sounds like you, apply with a short introduction about your experience and tell us about one project you managed from planning through delivery
Payment in Crypto
TAQuant
Operations Assistant
Full time
Remote
About the Role
We're looking for an Operations Assistant to work closely with our VP of Operations and help keep the company organized and running smoothly.
A big part of this role is taking things off the team's plate. You'll be working on documents, organizing files, keeping information up to date, writing and maintaining internal documentation, doing research, following up on tasks, and helping with whatever operational work needs to get done.
We're a lean team, so this is not a role where you'll be given one task and wait for the next one. There will be a lot of different things coming your way. Some will be routine, some will be completely new. We need someone who can figure things out, stay organized, and follow through without needing to be managed every step of the way.
We're also still in the process of bringing in investors, so we're keeping the team lean and being thoughtful about hiring. We're looking for someone who can be genuinely useful across different areas of the business and grow with the company.
Responsibilities
Work directly with the VP of Operations on day-to-day operational tasks
Create, organize, update, and maintain company documents and files
Keep Google Drive and other company folders clean, organized, and easy to navigate
Write and maintain SOPs, process documents, internal guides, and other documentation
Take information from meetings, chats, notes, and conversations and turn it into clear documentation
Maintain spreadsheets, trackers, reports, and other internal records
Help keep tasks, deadlines, and follow-ups organized
Research different topics and put together useful summaries and information
Help coordinate with team members and follow up on things that need to get done
Help improve the way we organize information and run internal processes
Assist with onboarding materials and other internal resources
Take on one-off projects and administrative tasks as needed
Handle confidential company information responsibly
Requirements
1+ years of experience in operations, administration, executive assistance, project coordination, or a similar role
Very organized and detail-oriented
Strong written English and comfortable writing clear documentation
Comfortable working with Google Docs, Sheets, Drive, and similar tools
Good at organizing large amounts of information and files
Able to manage multiple tasks without losing track of details
Comfortable working independently and figuring things out
Reliable and good at following through
Comfortable in a remote and fast-moving environment
Willing to do whatever needs to be done to keep things moving
Nice to Have
Experience working directly with a founder, executive, or operations team
Experience writing SOPs or internal documentation
Familiarity with Notion, Slack, ClickUp, Asana, Airtable, or similar tools
Good spreadsheet skills
Experience at a startup or small company
Comfortable using AI tools to help with research, writing, organization, and repetitive work
Experience in crypto, Web3, fintech, trading, or financial services
Who This Is For
This role is a good fit if you're naturally organized and like getting things done.
If someone sends you 20 files and says "please organize these," you should be able to figure out a sensible system and get it done.
If a process keeps coming up but nobody has documented it, you should be comfortable writing it down.
If you notice something is missing or could be done better, we want you to speak up and fix it.
We're looking for someone dependable, practical, and easy to work with. You don't need to know everything coming in. You just need to be willing to learn, take ownership, and get the work done.
We're looking for an Operations Assistant to work closely with our VP of Operations and help keep the company organized and running smoothly.
A big part of this role is taking things off the team's plate. You'll be working on documents, organizing files, keeping information up to date, writing and maintaining internal documentation, doing research, following up on tasks, and helping with whatever operational work needs to get done.
We're a lean team, so this is not a role where you'll be given one task and wait for the next one. There will be a lot of different things coming your way. Some will be routine, some will be completely new. We need someone who can figure things out, stay organized, and follow through without needing to be managed every step of the way.
We're also still in the process of bringing in investors, so we're keeping the team lean and being thoughtful about hiring. We're looking for someone who can be genuinely useful across different areas of the business and grow with the company.
Responsibilities
Work directly with the VP of Operations on day-to-day operational tasks
Create, organize, update, and maintain company documents and files
Keep Google Drive and other company folders clean, organized, and easy to navigate
Write and maintain SOPs, process documents, internal guides, and other documentation
Take information from meetings, chats, notes, and conversations and turn it into clear documentation
Maintain spreadsheets, trackers, reports, and other internal records
Help keep tasks, deadlines, and follow-ups organized
Research different topics and put together useful summaries and information
Help coordinate with team members and follow up on things that need to get done
Help improve the way we organize information and run internal processes
Assist with onboarding materials and other internal resources
Take on one-off projects and administrative tasks as needed
Handle confidential company information responsibly
Requirements
1+ years of experience in operations, administration, executive assistance, project coordination, or a similar role
Very organized and detail-oriented
Strong written English and comfortable writing clear documentation
Comfortable working with Google Docs, Sheets, Drive, and similar tools
Good at organizing large amounts of information and files
Able to manage multiple tasks without losing track of details
Comfortable working independently and figuring things out
Reliable and good at following through
Comfortable in a remote and fast-moving environment
Willing to do whatever needs to be done to keep things moving
Nice to Have
Experience working directly with a founder, executive, or operations team
Experience writing SOPs or internal documentation
Familiarity with Notion, Slack, ClickUp, Asana, Airtable, or similar tools
Good spreadsheet skills
Experience at a startup or small company
Comfortable using AI tools to help with research, writing, organization, and repetitive work
Experience in crypto, Web3, fintech, trading, or financial services
Who This Is For
This role is a good fit if you're naturally organized and like getting things done.
If someone sends you 20 files and says "please organize these," you should be able to figure out a sensible system and get it done.
If a process keeps coming up but nobody has documented it, you should be comfortable writing it down.
If you notice something is missing or could be done better, we want you to speak up and fix it.
We're looking for someone dependable, practical, and easy to work with. You don't need to know everything coming in. You just need to be willing to learn, take ownership, and get the work done.
Payment in Crypto
Oryon
Founding Growth & Partnerships Manager for Web3 x AI startup
Singapore
Singapore
Part time
Remote
We’re Hiring — Founding Growth & Partnerships Manager | Web3 x AI
One of Oryon’s early-stage portfolio startups is looking for a Founding Growth & Partnerships Manager to help build its commercial and ecosystem presence from an early stage.
The company is building infrastructure at the intersection of AI Agents, Web3 and on-chain applications.
Location: Remote / Global
Type: Full-time/Part-time
Compensation: $4,000–6,000 USDT/month + performance bonus (Part-time from $2,000/month)
Stage: Early-stage / Stealth
What you’ll do
Build strategic partnerships with Web3 protocols, AI projects, wallets, exchanges and infrastructure providers
Develop and execute GTM strategy
Source new ecosystem and integration opportunities
Work directly with founders on market positioning and commercial strategy
Build relationships with VCs, accelerators, KOLs and ecosystem partners
Support product launches, campaigns and community growth
Develop partnership pipelines from initial outreach through negotiation and closing
Help expand the project across APAC and global Web3 markets
We’re looking for
2+ years of experience in Web3 BD, Growth, Partnerships or Ecosystem
Existing network across Web3 / Crypto is a strong advantage
Experience closing partnerships or commercial deals
Strong understanding of DeFi, wallets, infrastructure, AI Agents or related areas
Ability to work independently in an early-stage startup environment
Professional English communication skills
Strong execution mindset — not just introductions, but ability to move deals to completion
Nice to have
Experience at a CEX, L1/L2 ecosystem, VC, launchpad or Web3 infrastructure company
Fundraising / investor relations experience
APAC network
Previous early-stage startup experience
You’ll work closely with the founding team and Oryon on partnerships, GTM and ecosystem expansion.
To apply, send your CV and a short introduction
One of Oryon’s early-stage portfolio startups is looking for a Founding Growth & Partnerships Manager to help build its commercial and ecosystem presence from an early stage.
The company is building infrastructure at the intersection of AI Agents, Web3 and on-chain applications.
Location: Remote / Global
Type: Full-time/Part-time
Compensation: $4,000–6,000 USDT/month + performance bonus (Part-time from $2,000/month)
Stage: Early-stage / Stealth
What you’ll do
Build strategic partnerships with Web3 protocols, AI projects, wallets, exchanges and infrastructure providers
Develop and execute GTM strategy
Source new ecosystem and integration opportunities
Work directly with founders on market positioning and commercial strategy
Build relationships with VCs, accelerators, KOLs and ecosystem partners
Support product launches, campaigns and community growth
Develop partnership pipelines from initial outreach through negotiation and closing
Help expand the project across APAC and global Web3 markets
We’re looking for
2+ years of experience in Web3 BD, Growth, Partnerships or Ecosystem
Existing network across Web3 / Crypto is a strong advantage
Experience closing partnerships or commercial deals
Strong understanding of DeFi, wallets, infrastructure, AI Agents or related areas
Ability to work independently in an early-stage startup environment
Professional English communication skills
Strong execution mindset — not just introductions, but ability to move deals to completion
Nice to have
Experience at a CEX, L1/L2 ecosystem, VC, launchpad or Web3 infrastructure company
Fundraising / investor relations experience
APAC network
Previous early-stage startup experience
You’ll work closely with the founding team and Oryon on partnerships, GTM and ecosystem expansion.
To apply, send your CV and a short introduction
Payment in Crypto
Oryon
Strategic Venture Partner — Web3 Markets & Ecosystem
Singapore
Singapore
Full time
Remote
Strategic Venture Partner — Web3 Markets & Ecosystem
Location: Singapore / Remote
Company: Oryon
Type: Full-time or long-term strategic engagement
About Oryon
Oryon is a hands-on venture capital firm focused on Web3 and AI. We work closely with founders and portfolio companies across strategy, partnerships, fundraising, market expansion, go-to-market execution, product growth, exchange relations, and commercialization.
Rather than operating purely as a financial investor, Oryon takes an active role in helping companies build stronger businesses and navigate complex markets.
We are currently expanding our network in Asia and are looking for an experienced Web3 professional to join us as a Strategic Venture Partner — Web3 Markets & Ecosystem.
The Role
This is a senior, relationship-driven position for someone who has spent significant time inside the crypto ecosystem and understands how projects, founders, exchanges, investors, market makers, funds, and token ecosystems interact.
You will work directly with the Oryon team and selected portfolio companies, helping identify opportunities, evaluate projects, develop strategic relationships, and support companies through key stages of growth.
The role combines venture strategy, ecosystem development, market intelligence, partnerships, and direct founder engagement.
Responsibilities
Identify promising Web3 companies, protocols, infrastructure projects, and emerging market opportunities.
Build and maintain relationships with founders, investors, exchanges, market makers, ecosystem funds, family offices, and other industry participants.
Participate in evaluating early-stage and growth-stage opportunities.
Analyze token economics, market structure, liquidity dynamics, competitive positioning, and ecosystem incentives.
Support founders with fundraising strategy and introductions to relevant strategic partners.
Help portfolio companies develop exchange, liquidity, ecosystem, and institutional relationships.
Identify strategic partnership opportunities across Asia and global Web3 markets.
Participate in discussions around new market opportunities, emerging narratives, and sector positioning.
Represent Oryon in selected private industry discussions, founder meetings, conferences, and ecosystem events.
Contribute independent investment and market perspectives to internal discussions.
Develop new commercial and strategic opportunities for both Oryon and its portfolio companies.
Who We’re Looking For
We are particularly interested in candidates with deep practical exposure to the crypto industry rather than purely theoretical experience.
A strong candidate may have experience in one or several of the following areas:
venture capital or crypto investment;
digital asset markets;
exchanges;
OTC and institutional markets;
market making;
token launches;
ecosystem development;
protocol partnerships;
crypto business development;
founder advisory;
private market transactions;
DeFi;
Web3 infrastructure.
You should have a strong understanding of how value moves through the crypto ecosystem and be comfortable speaking directly with founders, executives, investors, traders, and institutional counterparties.
Ideal Profile
5+ years of relevant experience in crypto, Web3, venture, fintech, or digital asset markets.
Strong existing network within the Web3 ecosystem.
Experience evaluating projects beyond surface-level narratives.
Good understanding of tokenomics, liquidity, exchanges, market cycles, and crypto-native business models.
Comfortable forming independent opinions and challenging consensus.
Strong negotiation and relationship-building skills.
Ability to operate independently in a distributed international environment.
Fluent professional English.
Singapore or broader APAC network is a strong advantage.
What Makes This Role Different
This is not a traditional corporate business-development role.
You will have significant exposure to founders, emerging technologies, new projects, strategic transactions, and investment discussions across the Web3 ecosystem.
We are looking for someone who already thinks like an operator and market participant and wants to work closely with companies rather than simply observe them from the outside.
What We Offer
Fully remote international working environment.
Direct interaction with founders and senior Oryon team members.
Exposure to early-stage and growth-stage Web3 companies.
Significant autonomy over partnerships and new opportunities.
Competitive compensation based on experience.
Performance-based upside for exceptional contributors.
Opportunity to develop into a broader Venture Partner role as Oryon expands.
Website: https://oryon.team
Oryon is currently operating in stealth mode, so only limited information about our activities is publicly available. Additional information about the firm, role, and collaboration structure will be discussed directly with selected candidates.
Location: Singapore / Remote
Company: Oryon
Type: Full-time or long-term strategic engagement
About Oryon
Oryon is a hands-on venture capital firm focused on Web3 and AI. We work closely with founders and portfolio companies across strategy, partnerships, fundraising, market expansion, go-to-market execution, product growth, exchange relations, and commercialization.
Rather than operating purely as a financial investor, Oryon takes an active role in helping companies build stronger businesses and navigate complex markets.
We are currently expanding our network in Asia and are looking for an experienced Web3 professional to join us as a Strategic Venture Partner — Web3 Markets & Ecosystem.
The Role
This is a senior, relationship-driven position for someone who has spent significant time inside the crypto ecosystem and understands how projects, founders, exchanges, investors, market makers, funds, and token ecosystems interact.
You will work directly with the Oryon team and selected portfolio companies, helping identify opportunities, evaluate projects, develop strategic relationships, and support companies through key stages of growth.
The role combines venture strategy, ecosystem development, market intelligence, partnerships, and direct founder engagement.
Responsibilities
Identify promising Web3 companies, protocols, infrastructure projects, and emerging market opportunities.
Build and maintain relationships with founders, investors, exchanges, market makers, ecosystem funds, family offices, and other industry participants.
Participate in evaluating early-stage and growth-stage opportunities.
Analyze token economics, market structure, liquidity dynamics, competitive positioning, and ecosystem incentives.
Support founders with fundraising strategy and introductions to relevant strategic partners.
Help portfolio companies develop exchange, liquidity, ecosystem, and institutional relationships.
Identify strategic partnership opportunities across Asia and global Web3 markets.
Participate in discussions around new market opportunities, emerging narratives, and sector positioning.
Represent Oryon in selected private industry discussions, founder meetings, conferences, and ecosystem events.
Contribute independent investment and market perspectives to internal discussions.
Develop new commercial and strategic opportunities for both Oryon and its portfolio companies.
Who We’re Looking For
We are particularly interested in candidates with deep practical exposure to the crypto industry rather than purely theoretical experience.
A strong candidate may have experience in one or several of the following areas:
venture capital or crypto investment;
digital asset markets;
exchanges;
OTC and institutional markets;
market making;
token launches;
ecosystem development;
protocol partnerships;
crypto business development;
founder advisory;
private market transactions;
DeFi;
Web3 infrastructure.
You should have a strong understanding of how value moves through the crypto ecosystem and be comfortable speaking directly with founders, executives, investors, traders, and institutional counterparties.
Ideal Profile
5+ years of relevant experience in crypto, Web3, venture, fintech, or digital asset markets.
Strong existing network within the Web3 ecosystem.
Experience evaluating projects beyond surface-level narratives.
Good understanding of tokenomics, liquidity, exchanges, market cycles, and crypto-native business models.
Comfortable forming independent opinions and challenging consensus.
Strong negotiation and relationship-building skills.
Ability to operate independently in a distributed international environment.
Fluent professional English.
Singapore or broader APAC network is a strong advantage.
What Makes This Role Different
This is not a traditional corporate business-development role.
You will have significant exposure to founders, emerging technologies, new projects, strategic transactions, and investment discussions across the Web3 ecosystem.
We are looking for someone who already thinks like an operator and market participant and wants to work closely with companies rather than simply observe them from the outside.
What We Offer
Fully remote international working environment.
Direct interaction with founders and senior Oryon team members.
Exposure to early-stage and growth-stage Web3 companies.
Significant autonomy over partnerships and new opportunities.
Competitive compensation based on experience.
Performance-based upside for exceptional contributors.
Opportunity to develop into a broader Venture Partner role as Oryon expands.
Website: https://oryon.team
Oryon is currently operating in stealth mode, so only limited information about our activities is publicly available. Additional information about the firm, role, and collaboration structure will be discussed directly with selected candidates.
Payment in Crypto