Site Reliability Engineer, Blockchain Infrastructure
Status
USA
Full time
Remote
Compensation is not specified
Role
DevOps
Description
Company Overview:
At Galaxy, we are dedicated to developing products and services that facilitate global investment in economic advancement through crypto and blockchain technologies. With a firm belief in the transformative potential of these innovations, we strive to create a future where value and ownership are as fluid as information itself. Galaxy operates as a prominent digital asset and blockchain player, offering tailored platform solutions suited for a digital-native ecosystem through three key business segments: Global Markets, Asset Management, and Digital Infrastructure Solutions. Our comprehensive offerings encompass trading, lending, advisory services, investment solutions, mining and hosting services, network validation, and custodial technology development. Led by our CEO and Founder Michael Novogratz, our team combines crypto enthusiasts with seasoned industry professionals, centrally focused on shaping the future of finance and Web3. Headquartered in New York City, Galaxy operates globally across North America, Europe, and Asia.
Company Values:
We are a diverse team of forward-thinkers and high-achievers united by a mission to revitalize the global economy for investors and innovators. We seek individuals who excel in a culture of innovation, value performance, embrace transparent feedback, and prioritize mission-centric work. Our values embodied in seeking excellence, selective efficiency, aligned collaboration, transparent objection, empowered decision-making, and team building, drive our culture and contribute to our collective success.
Role Overview:
As an SRE/DevOps Engineer specializing in Web3/Blockchain at Galaxy, you will play a pivotal role in maintaining the reliability, scalability, and security of our blockchain infrastructure. Working closely with teams managing proof-of-stake validators, Bitcoin mining operations, and digital asset custody solutions, you will contribute by enhancing and supporting our cutting-edge technology stack. Your proficiency in cloud infrastructure, monitoring tools, and observability practices will be instrumental in advancing our business objectives.
Key Responsibilities:
- Design, build, and uphold scalable, secure infrastructure for proof-of-stake validators, Bitcoin mining, and custody solutions
- Collaborate with diverse teams to identify and implement enhancements in infrastructure, monitoring capabilities, and incident response procedures
- Deploy monitoring and observability tools to ensure the health, performance, and resilience of our blockchain infrastructure
- Develop and maintain automation solutions to streamline deployment, scalability, and recovery processes
- Support the Bitcoin mining team in deploying and managing cloud components, VMWare, and other virtualization technologies
- Implement and uphold security best practices across infrastructural aspects including access controls, encryption, and network security
- Engage in on-call duties to ensure continuous service reliability and uptime
- Stay informed on emerging trends and advancements in the Web3/blockchain domain through ongoing research
Qualifications:
- Bachelor's degree in Computer Science, Engineering, or related discipline, or equivalent professional experience
- Minimum 5 years of experience in SRE/DevOps, specializing in Web3/blockchain technologies
- Previous experience in managing Ethereum or Solana infrastructure is essential
- Deep understanding of proof-of-stake consensus mechanisms, with experience in validator management
- Proficient in cloud platforms (AWS, Azure, GCP) and virtualization technologies (VMWare, KVM, Docker)
- Skilled in scripting languages (Python, Bash) and infrastructure automation tools (Terraform, Ansible, Chef)
- Strong background in monitoring and observability tools (Prometheus, Grafana, ELK Stack, Datadog)
- Knowledgeable in security practices such as encryption, access control, and network security
- Exceptional problem-solving skills, effective communication, and team collaboration abilities
- Capable of adapting to a fast-paced, dynamic work environment
Additional Skills (Preferred):
- Experience with digital asset custody solutions and security practices
- Familiarity with other blockchains (Cosmos, etc.) and layer2 strategies
- Bonus points for exposure to various Web3/blockchain ecosystems
Benefits:
- Competitive base salary with bonus potential
- Flexible paid time off policy
- 3% company contribution to 401(k) retirement plan
- Comprehensive health and protective benefits for employees and families
- Generous paid Parental Leave
- Access to virtual coaching and counseling services through Ginger
- Learning opportunities in the Crypto industry
- In-office complimentary daily snacks
- Dynamic, entrepreneurial, and collaborative colleagues
- Employee Resource Groups support network
(Note: Benefit offerings may vary by location)
Equal Opportunity Statement:
Galaxy values diversity and commits to providing equal employment opportunities without regard to factors such as age, race, gender, pregnancy-related conditions, gender identity, sexual orientation, marital status, ancestry, disability, military veteran status, genetic information, or other protected categories. We strive to accommodate qualified applicants with disabilities unless there is an undue operational hardship. If you require accommodation during the application process or interview, please contact careers@galaxy.com.
Skills Required
Galaxy
Website
galaxycrypto.caCompany size
Not specified
Location
United States
Description
Not specified
Status
DeGameVerse
Game Developer / AI Integration Developer — Startup
Full time
Remote
About DeGameVerse
DeGameVerse is building a next-generation Web3 gaming ecosystem where developers create games and players play, progress, and earn within a unified platform.
We are building:
▫️ AI-assisted game creation tools
▫️ Web-based casual & idle games
▫️ Player-first reward economy
▫️ Walletless onboarding experience
This is an early-stage startup forming its core founding team.
Role Overview
We are looking for a creative and technically strong Game Developer who can also explore AI-driven game generation and integration.
You will help build engaging web-based games and connect them to the DeGameVerse ecosystem.
This is a builder role, not a traditional employment position.
Responsibilities
Develop simple to mid-level web games (JavaScript / Phaser / Unity WebGL)
Design core gameplay mechanics (progression, rewards, loops)
Integrate games into DeGameVerse platform ecosystem
Work on AI-assisted game creation concepts and prototypes
Handle game logic, scoring, and interaction systems
Collaborate with full-stack developer for platform integration
Optimize games for mobile-first web experience
Requirements
Strong understanding of JavaScript or game development frameworks
Experience building browser-based or mobile-friendly games
Good grasp of game mechanics and player engagement loops
Creative mindset for designing fun and scalable gameplay
Bonus Skills
Experience with Phaser / Unity WebGL / Three.js
Exposure to AI tools (GPT APIs, procedural generation, etc.)
Interest in Web3 gaming or digital economies
Experience with casual or idle game development
What We Offer
Early founding team position in DeGameVerse ecosystem
Equity-based contribution model
Opportunity to publish games under a shared ecosystem
High creative freedom in game design and experimentation
Direct collaboration with core product founder
Important Note
This is an early-stage startup role.
There is no fixed salary at this stage. Compensation is based on equity and long-term ecosystem growth.
How to Apply
Send:
Portfolio / GitHub / game demos
Short intro about your experience
Why you want to build Web3 games
Any previous projects (if available)
DeGameVerse is building a next-generation Web3 gaming ecosystem where developers create games and players play, progress, and earn within a unified platform.
We are building:
▫️ AI-assisted game creation tools
▫️ Web-based casual & idle games
▫️ Player-first reward economy
▫️ Walletless onboarding experience
This is an early-stage startup forming its core founding team.
Role Overview
We are looking for a creative and technically strong Game Developer who can also explore AI-driven game generation and integration.
You will help build engaging web-based games and connect them to the DeGameVerse ecosystem.
This is a builder role, not a traditional employment position.
Responsibilities
Develop simple to mid-level web games (JavaScript / Phaser / Unity WebGL)
Design core gameplay mechanics (progression, rewards, loops)
Integrate games into DeGameVerse platform ecosystem
Work on AI-assisted game creation concepts and prototypes
Handle game logic, scoring, and interaction systems
Collaborate with full-stack developer for platform integration
Optimize games for mobile-first web experience
Requirements
Strong understanding of JavaScript or game development frameworks
Experience building browser-based or mobile-friendly games
Good grasp of game mechanics and player engagement loops
Creative mindset for designing fun and scalable gameplay
Bonus Skills
Experience with Phaser / Unity WebGL / Three.js
Exposure to AI tools (GPT APIs, procedural generation, etc.)
Interest in Web3 gaming or digital economies
Experience with casual or idle game development
What We Offer
Early founding team position in DeGameVerse ecosystem
Equity-based contribution model
Opportunity to publish games under a shared ecosystem
High creative freedom in game design and experimentation
Direct collaboration with core product founder
Important Note
This is an early-stage startup role.
There is no fixed salary at this stage. Compensation is based on equity and long-term ecosystem growth.
How to Apply
Send:
Portfolio / GitHub / game demos
Short intro about your experience
Why you want to build Web3 games
Any previous projects (if available)
DeGameVerse
Full Stack Developer (Core Builder) — Startup
Full time
Remote
About DeGameVerse
DeGameVerse is building a next-generation Web3 gaming platform where developers can create games and players can play, progress, and earn inside a unified ecosystem.
We are focused on:
Walletless onboarding
AI-assisted game creation
Player-first game economy
Mobile-friendly gaming experiencesexperiences
This is an early-stage startup currently building its core founding team.
Role Overview
We are looking for a passionate Full Stack Developer to help build the core infrastructure of DeGameVerse.
You will work directly with the founder to develop the platform architecture, user systems, game hub, and Web3 integrations.
This is not a traditional job position. We are building with a startup mindset and long-term vision.
Responsibilities
Build responsive frontend interfaces using React / Next.js
Develop backend APIs and database systems
Implement authentication and user management
Integrate MPC wallet / Web3 onboarding systems
Create scalable game hub architecture
Optimize platform performance and security
Collaborate on product decisions and feature planning
Requirements
Strong knowledge of React / Next.js
Experience with backend development (Node.js, Firebase, Supabase, etc.)
Understanding of REST APIs and databases
Basic understanding of Web3 concepts
Strong problem-solving skills
Ability to work independently in a startup environment
Bonus Skills
Wallet integration experience
Web3 or blockchain project experience
Multiplayer or gaming platform experience
AI tool integration experience
What We Offer
Early core team position
Equity-based opportunity
Direct impact on product direction
Opportunity to help build a large-scale Web3 gaming ecosystem from the ground up
Important
This is an early-stage startup role.
No fixed salary initially. Compensation will be equity-based until funding or revenue is secured.
DeGameVerse is building a next-generation Web3 gaming platform where developers can create games and players can play, progress, and earn inside a unified ecosystem.
We are focused on:
Walletless onboarding
AI-assisted game creation
Player-first game economy
Mobile-friendly gaming experiencesexperiences
This is an early-stage startup currently building its core founding team.
Role Overview
We are looking for a passionate Full Stack Developer to help build the core infrastructure of DeGameVerse.
You will work directly with the founder to develop the platform architecture, user systems, game hub, and Web3 integrations.
This is not a traditional job position. We are building with a startup mindset and long-term vision.
Responsibilities
Build responsive frontend interfaces using React / Next.js
Develop backend APIs and database systems
Implement authentication and user management
Integrate MPC wallet / Web3 onboarding systems
Create scalable game hub architecture
Optimize platform performance and security
Collaborate on product decisions and feature planning
Requirements
Strong knowledge of React / Next.js
Experience with backend development (Node.js, Firebase, Supabase, etc.)
Understanding of REST APIs and databases
Basic understanding of Web3 concepts
Strong problem-solving skills
Ability to work independently in a startup environment
Bonus Skills
Wallet integration experience
Web3 or blockchain project experience
Multiplayer or gaming platform experience
AI tool integration experience
What We Offer
Early core team position
Equity-based opportunity
Direct impact on product direction
Opportunity to help build a large-scale Web3 gaming ecosystem from the ground up
Important
This is an early-stage startup role.
No fixed salary initially. Compensation will be equity-based until funding or revenue is secured.
Bitrefill
Senior Data Scientist / ML Engineer – Crypto Payments & Lightning Network
Stockholm, Sweden
Stockholm, Sweden
Full time
Remote
About Bitrefill
Bitrefill is the world's leading crypto lifestyle platform. We enable millions of users globally to pay for gift cards, mobile phone refills, and everyday goods using Bitcoin, Lightning Network, and other digital assets. Our long-term goal is to provide everyone with the tools to use crypto as real "digital money" daily — without needing to register for additional services or log into a web platform.
We are now actively building a new product: the Bitrefill crypto card for paying for goods and services in everyday life.
The Role
We are looking for a Senior DS/ML Engineer to help us make data-driven decisions across fraud detection, Lightning Network liquidity optimization, user behavior modeling, and risk scoring for the crypto card.
You won't just build models — you'll help shape the ML infrastructure of a fast-growing crypto-payments startup.
What You'll Do
Fraud & Risk ML — Develop anomaly detection models, transaction scoring for withdrawals, and real-time predictive rules to flag suspicious activity.
Lightning Network optimization — Build models to optimize payment routing, channel liquidity management, and predict channel health.
Crypto card infrastructure — Create credit risk models and user scoring for card issuance without traditional credit history.
LTV & churn prediction — Forecast user behavior to improve retention and conversion, especially in low-crypto-adoption countries.
Product & growth analytics — Develop ML-driven hypotheses for A/B testing and recommendation systems (e.g., which gift cards to offer).
Data pipeline & MLOps — Help build pipelines for training and deploying models to production (alongside engineers).
Requirements
5+ years of experience in Data Science / Machine Learning, ideally in fintech, payments, crypto, or high-throughput transactional systems.
Strong experience building anti-fraud models, time series forecasting (for transactions), LTV predictions, or classification/clustering models.
Python — solid proficiency (pandas, scikit-learn, xgboost/lightgbm; PyTorch/TensorFlow is a plus).
SQL — advanced level.
Experience with Airflow, dbt, or similar ETL/ML pipeline tools.
Understanding of Lightning Network basics (or strong willingness to dive deep within 1–2 weeks).
English — sufficient to discuss ML metrics and business problems fluently.
Big Pluses
Experience with graph models (Node2Vec, GNNs) for transaction chain detection.
Familiarity with blockchain analytics (on-chain data, addresses, transactions).
Experience in credit scoring without traditional credit history.
MLOps skills (Docker, Kubeflow, MLflow, or at least deploying models via FastAPI).
Personal experience using Bitrefill or crypto as a payment tool.
We Offer
Fully remote work from anywhere in the world (with ~4–6 hours overlap with Stockholm time zone).
Opportunity to build an ML system from scratch in a startup that is truly changing how people use crypto.
Competitive salary + equity (tokens) or profit-sharing.
Minimal bureaucracy — maximum responsibility and freedom.
Work with cutting-edge technologies: Lightning Network and crypto cards.
How to Apply
Send your resume and a link to your GitHub / Kaggle / project where you solved a fraud, time series, or risk modeling problem. Mention if you have experience with Lightning or blockchain analytics — if not, just tell us how quickly you can learn new domains.
Bitrefill is the world's leading crypto lifestyle platform. We enable millions of users globally to pay for gift cards, mobile phone refills, and everyday goods using Bitcoin, Lightning Network, and other digital assets. Our long-term goal is to provide everyone with the tools to use crypto as real "digital money" daily — without needing to register for additional services or log into a web platform.
We are now actively building a new product: the Bitrefill crypto card for paying for goods and services in everyday life.
The Role
We are looking for a Senior DS/ML Engineer to help us make data-driven decisions across fraud detection, Lightning Network liquidity optimization, user behavior modeling, and risk scoring for the crypto card.
You won't just build models — you'll help shape the ML infrastructure of a fast-growing crypto-payments startup.
What You'll Do
Fraud & Risk ML — Develop anomaly detection models, transaction scoring for withdrawals, and real-time predictive rules to flag suspicious activity.
Lightning Network optimization — Build models to optimize payment routing, channel liquidity management, and predict channel health.
Crypto card infrastructure — Create credit risk models and user scoring for card issuance without traditional credit history.
LTV & churn prediction — Forecast user behavior to improve retention and conversion, especially in low-crypto-adoption countries.
Product & growth analytics — Develop ML-driven hypotheses for A/B testing and recommendation systems (e.g., which gift cards to offer).
Data pipeline & MLOps — Help build pipelines for training and deploying models to production (alongside engineers).
Requirements
5+ years of experience in Data Science / Machine Learning, ideally in fintech, payments, crypto, or high-throughput transactional systems.
Strong experience building anti-fraud models, time series forecasting (for transactions), LTV predictions, or classification/clustering models.
Python — solid proficiency (pandas, scikit-learn, xgboost/lightgbm; PyTorch/TensorFlow is a plus).
SQL — advanced level.
Experience with Airflow, dbt, or similar ETL/ML pipeline tools.
Understanding of Lightning Network basics (or strong willingness to dive deep within 1–2 weeks).
English — sufficient to discuss ML metrics and business problems fluently.
Big Pluses
Experience with graph models (Node2Vec, GNNs) for transaction chain detection.
Familiarity with blockchain analytics (on-chain data, addresses, transactions).
Experience in credit scoring without traditional credit history.
MLOps skills (Docker, Kubeflow, MLflow, or at least deploying models via FastAPI).
Personal experience using Bitrefill or crypto as a payment tool.
We Offer
Fully remote work from anywhere in the world (with ~4–6 hours overlap with Stockholm time zone).
Opportunity to build an ML system from scratch in a startup that is truly changing how people use crypto.
Competitive salary + equity (tokens) or profit-sharing.
Minimal bureaucracy — maximum responsibility and freedom.
Work with cutting-edge technologies: Lightning Network and crypto cards.
How to Apply
Send your resume and a link to your GitHub / Kaggle / project where you solved a fraud, time series, or risk modeling problem. Mention if you have experience with Lightning or blockchain analytics — if not, just tell us how quickly you can learn new domains.
Payment in Crypto
New Gig Workforce Solutions
Chief Technology Officer (CTO) – Blockchain Gaming Platform
Full time
Remote
We are supporting a well-funded startup building a next-generation blockchain gaming platform powered by AI technology. The company is backed by strong investors and has already launched an initial version of its product. As the platform evolves, the team is rebuilding its technology stack and infrastructure to support scalable on-chain gaming mechanics, digital asset ownership, and advanced blockchain integrations. This role goes far beyond a typical executive position. The client is looking for a Chief Technology Officer (CTO) with deep blockchain expertise and strong leadership capabilities who can define the long-term technical vision, lead engineering execution, and help shape the future direction of the company. The ideal candidate has a hands-on mindset, startup experience, and is passionate about building innovative products in the blockchain gaming space. Responsibilities Define and lead the company’s overall technical vision and engineering strategy Oversee architecture and development of blockchain infrastructure and gaming systemsLead and scale engineering teams across Web3, backend, frontend, DevOps, and AI functions Drive technical decision-making for scalability, security, and product performance Collaborate closely with founders, product teams, and stakeholders on roadmap execution Establish engineering processes, development standards, and technical best practices Guide smart contract architecture and blockchain integrations Support hiring, mentoring, and team growth across technical departments Evaluate emerging technologies and industry trends relevant to blockchain gaming and AIRequirements Strong leadership experience as a CTO, Head of Engineering, or senior technical leader Deep understanding of blockchain ecosystems, Web3 technologies, and smart contractsStrong technical background in modern software development and system architectureExperience managing and scaling engineering teams in startup environments Understanding of cloud infrastructure, DevOps, and scalable distributed systems Experience with React, Node.js, or modern web technologies is a strong plusFamiliarity with gaming, NFT ecosystems, or digital asset platforms is highly preferredStrong communication and decision-making skillsEntrepreneurial mindset with interest in long-term product ownership and company growth Benefits and PerksCompetitive executive compensation package with equity participationHealth, dental, and vision coverage Unlimited PTOPension contributionRemote-friendly environment with flexibilityExpense reimbursement for home internet and phoneOngoing professional development and leadership growth opportunitiesOpportunity to shape the future of a blockchain gaming platform at an early stage Hiring Process Introductory conversationStrategic and technical discussions with leadership teamFinal alignment and offer discussions
Payment in Crypto
Visualpesto Sosso
We are looking for a partner who will bring users to our website
Full time
Remote
Hello everyone,
We have a website where we organize paid raffles/giveaways. We are looking for teammates who have marketing knowledge or an audience/communit and can attract people to join these raffles.
Once the required number of participants is reached, the raffle will be drawn, and after the prizes are distributed, you will receive 15% of the remaining profit from the website. I would also like to point out that your earnings are determined as soon as a raffle is created.
Requirements:
-Someone who already has an audience/community and can encourage them to participate in paid raffles,
-Someone who owns a YouTube channel, Telegram channel, or groups on other platforms and can promote/share the raffles. Or instead of the points above, someone with strong marketing skills
-Who can attract users to the website using their own methods.
Additional notes:
Payments will be made to you via Laborx once the total participant count is completed. Raffles can be for 1,000 people or even 1 million people. The more participants you bring, the better.
More games and features will also be added to the website to keep users active on the platform. If you would like to join us on this highly profitable journey, please don't hesitate to get in touch.
Note; The website is already live and fully operational. We are about to launch our very first raffle.
We have a website where we organize paid raffles/giveaways. We are looking for teammates who have marketing knowledge or an audience/communit and can attract people to join these raffles.
Once the required number of participants is reached, the raffle will be drawn, and after the prizes are distributed, you will receive 15% of the remaining profit from the website. I would also like to point out that your earnings are determined as soon as a raffle is created.
Requirements:
-Someone who already has an audience/community and can encourage them to participate in paid raffles,
-Someone who owns a YouTube channel, Telegram channel, or groups on other platforms and can promote/share the raffles. Or instead of the points above, someone with strong marketing skills
-Who can attract users to the website using their own methods.
Additional notes:
Payments will be made to you via Laborx once the total participant count is completed. Raffles can be for 1,000 people or even 1 million people. The more participants you bring, the better.
More games and features will also be added to the website to keep users active on the platform. If you would like to join us on this highly profitable journey, please don't hesitate to get in touch.
Note; The website is already live and fully operational. We are about to launch our very first raffle.
Payment in Crypto