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Location: Midtown, New York, NY and Singapore (In-office Mon–Thurs, Remote Fridays) Team: Payments Infrastructure – Mid, Senior, Staff, or Principal Levels
Company: Fun.xyz
Company Description
At Fun.xyz, we believe a tokenized future is a beneficial inevitability, granting financial emancipation to everyone with an internet connection. For a blockchain-first global economy to exist, value exchange must become intuitive, secure, and seamless.
Enter Checkout - the highest converting payment solution in web3. By integrating Checkout, dApps enable users to complete any on-chain action using crypto from a wallet, centralized exchange, or on-ramped fiat from a card or bank account. With access to market-leading routing and their asset portfolio at the point of sale, users are faster, stickier, and more engaged. For dApps, Checkout scales their user acquisition potential without launching new chains or integrating multiple third party providers.
We built Checkout because we envision a world where anyone, anywhere, can purchase anything with any asset. If that sounds like a vision you can get behind, we want to hear from you.
About The Role
We’re looking for a BackEnd Engineer to join our growing team at Fun.xyz and help architect the backend services that power our web3 payments infrastructure. This role is foundational to the success of our platform and will shape how payments, settlement, and transaction routing are handled across chains and payment providers. You’ll be working on high-performance, low-latency systems that support complex use cases like asset conversion, identity and security verification, transaction finality, and decentralized routing—while ensuring fault tolerance, scalability, and compliance across a global user base.
What You’ll Do
- Design and Scale Core Infrastructure: Architect robust backend services that power our Checkout engine and crypto SDK integrations
- Implement Secure, Reliable APIs: Build internal and external APIs for wallet management, payments orchestration, and token conversion across off-chain networks
- Integrate with Blockchains and External Systems: Collaborate with protocol and web3 partners to securely integrate on-chain actions, while also bridging to fiat and off-chain providers like CEXs, banks, and KYC vendors
- Own Transaction Lifecycle Logic: Handle everything from initiation to settlement, including multi-party transaction signing, auditing, and reconciliation.
- Enable Developer Success: Work closely with SDK and frontend teams to build abstractions that make integrating FunKit seamless.
- Design for High Throughput: Support hundreds of transactions per second with graceful degradation and global redundancy.
- Support Regulatory & Compliance Needs: Build infrastructure that supports KYC/AML, data retention policies, and auditability requirements
- Mentor and Collaborate: Lead by example in code quality, technical design, and engineering best practices
- Bachelor’s or Master’s in Computer Science, Engineering, or a related field. Equivalent professional experience is acceptable
- 4+ years of experience building and deploying distributed backend systems
- Deep experience with backend languages, Node.js, TypeScript is preferred
- Experience with monitoring and log management tools such as Prometheus, Grafana, CloudWatch, ELK Stack, or Splunk
- Experience with system networking, including aspects like TCP/IP, DNS, load balancing, VPN, VPC, subnetting, and routing protocols
- Experience working with various database systems like MySQL, PostgreSQL, or DynamoDB.
- Experience using infrastructure-as-code tools like Terraform, CloudFormation, or AWS CDK
- Ability to write, test, and debug smart contracts
- Familiarity with DeFi protocols and NFT standards
- Proficiency in writing automated tests for smart contracts
- Experience working in high-throughput, low-latency environments
- Excellent communication and collaboration skills across cross-functional teams
- Strong understanding of system design, caching, data modeling, and error handling
- Exposure to web3 technologies, including Ethereum, EVM-compatible chains, smart contract interaction
- Experience working with crypto custody providers, decentralized wallets, or key management tools (e.g., Fireblocks, Gnosis Safe, MPC wallets)
- Previous work on payment gateways, crypto exchanges, or DeFi protocols
- Familiarity with chain abstraction layers or bridges (e.g., LayerZero, Wormhole, etc.)
- Knowledge of blockchain data indexing or transaction reconciliation
- Contributions to open-source infrastructure or developer tools
- You take ownership and accountability seriously
- You build systems with long-term maintainability and performance in mind.
- You thrive in environments that require both speed and rigor
- You are naturally curious about emerging technology and new paradigms.
- You think deeply about reliability, security, and system tradeoffs.
- You want to make a real-world impact by helping people transact with freedom and ease
- Shape the future of payments and programmable money
- Work with bleeding-edge tech in a domain where innovation moves fast
- Join a mission-driven team focused on access, openness, and trust
- Be a key contributor, not just a cog—your work will ship fast and matter
- Collaborate with top-tier protocols, builders, and financial infrastructure providers
How much do crypto jobs pay?
The salaries for cryptocurrency jobs vary widely depending on the specific role, industry, location, experience, and other factors
However, in general, cryptocurrency jobs tend to pay relatively well compared to other industries
Here are some examples of average salaries for popular cryptocurrency jobs:
- Blockchain Developer: The average salary for a blockchain developer in the US is around $105,000 per year, with salaries ranging from $60,000 to $180,000 per year.
- Cryptocurrency Analyst: The average salary for a cryptocurrency analyst in the US is around $85,000 per year, with salaries ranging from $50,000 to $135,000 per year.
- Cryptocurrency Trader: The average salary for a cryptocurrency trader in the US is around $95,000 per year, with salaries ranging from $40,000 to $180,000 per year.
- Marketing and PR Manager: The average salary for a marketing and PR manager in the US is around $77,000 per year, with salaries ranging from $43,000 to $128,000 per year.
- Crypto Lawyer: The average salary for a crypto lawyer in the US is around $120,000 per year, with salaries ranging from $70,000 to $200,000 per year.
Is crypto jobs legit?
Yes, cryptocurrency jobs are generally legitimate, and the industry has created many job opportunities over the years
As the cryptocurrency industry has grown, it has attracted a significant number of legitimate businesses and organizations that require talented individuals to work in various roles, such as blockchain development, cryptocurrency analysis, trading, marketing, public relations, law, and compliance, among others
However, as with any industry, there are also fraudulent job postings and scams that try to take advantage of people looking for work
It is essential to be cautious and thoroughly research any company or job opportunity before applying or accepting a position
You should always verify that the job posting is from a legitimate company and never provide sensitive personal or financial information without ensuring that the opportunity is genuine
To avoid scams, you can do the following:
- Research the company before applying for a job or accepting a job offer. Check the company's website, social media, and reviews to ensure that it is legitimate.
- Verify the job posting and contact information. Ensure that the email, phone number, or website listed in the job posting is valid.
- Don't pay for a job or training. A legitimate company will not ask you to pay for a job or training.
- Be wary of job offers that sound too good to be true. If a job offer promises a high salary or unrealistic benefits, it could be a scam.
What careers are there in crypto?
The market of cryptocurrency jobs has grown rapidly in recent years, creating a wide range of career opportunities in various sectors
Here are some of the careers in crypto that you can explore:
- Blockchain Consultant: Consultants offer advice to businesses and organizations that are exploring the implementation of blockchain technology. They help with strategic planning, implementation, and optimization.
- Blockchain Developer: Developers are responsible for creating and maintaining blockchain-based applications and smart contracts. They need to have experience in coding languages like Solidity, C++, and Python.
- Crypto Compliance Officer: These professionals ensure that businesses operating in the crypto industry comply with relevant laws and regulations.
- Crypto Journalist: A journalist who specializes in reporting on cryptocurrencies and the blockchain industry. They write news articles, feature stories, and analysis.
- Crypto Lawyer: Lawyers who specialize in the crypto industry help navigate complex regulatory and legal frameworks.
- Cryptocurrency Analyst: An analyst researches and analyzes cryptocurrencies and the market trends. They provide insights on trading, investments, and risk management.
- Cryptocurrency Educator: Educators help individuals and businesses understand the concepts and technicalities of cryptocurrencies and the blockchain technology.
- Cryptocurrency Trader: Traders buy and sell cryptocurrencies on exchanges, making profits by predicting market movements.
- Marketing and PR Manager: These professionals are responsible for promoting crypto projects, managing the brand's online presence, and building community engagement.
Can you make a career out of cryptocurrency?
Yes, it is possible to make a career out of cryptocurrency
The cryptocurrency industry has grown rapidly in recent years, and there are now many job opportunities available in various sectors related to blockchain and digital currencies
Some of the most common career paths in cryptocurrency include blockchain development, cryptocurrency trading, cryptocurrency analysis, marketing and public relations, and cryptocurrency journalism
There are also roles in cryptocurrency consulting, law, and compliance, among others
To pursue a career in cryptocurrency, it is important to have a strong understanding of the technology and how it works
This may require education or training in computer science, economics, or finance, depending on the specific career path you choose
Additionally, keeping up with the latest developments in the industry is crucial to stay competitive and relevant
As with any career, success in the cryptocurrency industry also requires a strong work ethic, dedication, and a willingness to continuously learn and adapt to new developments
While the industry is still relatively new and rapidly evolving, it has the potential to offer exciting and rewarding career opportunities for those who are passionate about the technology and willing to put in the effort to succeed.
What is crypto jobs?
Crypto jobs refer to employment opportunities in the cryptocurrency industry
This can include jobs related to the development of cryptocurrency technology, such as blockchain development, as well as jobs in crypto-related companies, such as exchanges or payment processing firms
Some examples of crypto jobs include blockchain engineers, crypto traders, and compliance specialists
These jobs often require specialized knowledge and expertise in the field of cryptocurrencies and blockchain technology.