Senior Software Engineer (Blockchain)
Status
London, UK
Full time
Office
Compensation is not specified
Role
Software Engineer
Description
Copper is a technology company specializing in digital assets, with a focus on assisting institutional investors in acquiring, trading, and securely storing crypto assets. Founded and led by Dmitry Tokarev, an expert in software and financial engineering, the company offers a range of custody, trading, and settlement solutions to minimize counterparty risk and enhance efficiency in digital asset markets. At the core of Copper's services is its innovative Multi-Party Computation (MPC) technology, known for its unparalleled security features in custody. The firm's award-winning custody system uniquely allows connectivity to centralized exchanges, DeFi applications, and staking pools while assets remain in custody.
Developed over this advanced custody framework, ClearLoop™ stands out as the industry's first solution designed to mitigate counterparty risk associated with exchanges. By enabling rapid settlement times independent of blockchain networks and incorporating robust security measures, ClearLoop™ is revolutionizing the way asset managers trade and manage capital. Copper boasts industry-leading security certifications and substantial insurance coverage from a top-rated insurer, making it a preferred partner for institutions seeking asset protection.
Department environment: Copper aims to blend a corporate and startup culture, fostering proximity to product solutions. The department is structured into small, autonomous teams empowered to make decisions throughout the product development lifecycle. Collaboration, innovation, and support are key components as teams progress from conceptualization through architecture, development, release, iteration, and support.
Role Responsibilities:
- Enhance and maintain existing services handling over 50 blockchain protocols and 500+ cryptocurrency assets.
- Research and implement new blockchain integrations and solutions; focus areas include blockchain data processing, crypto protocols, DeFi integration, etc.
- Address and resolve client and stakeholder issues effectively.
Your experience, skills, and knowledge:
- Proficiency in OOP languages like Scala, JS/TS (Node.js), Kotlin, Java, or Go.
- Familiarity with relational databases such as PostgreSQL.
- Strong understanding of unit testing principles and ability to construct automated server-side tests.
- Demonstrated curiosity and aptitude for continuous learning as a versatile developer.
Desirable skills:
- Hands-on experience with containerization and DevOps practices.
- Previous involvement in Smart Contract development.
- Familiarity with blockchain development components like cryptocurrency wallets, blockchain data processing, DeFi, etc.
- Expertise in optimizing systems for extensive data handling within database interactions and across services.
- Prior experience with Go programming language.
Our core tech stack: In this role, you will predominantly work with Scala and Typescript:
- Languages: Scala, Javascript/Typescript (Node.js)
- Storage: PostgreSQL, Mongo DB, Clickhouse
- Backend Frameworks: Spring, Akka HTTP
- Frontend Frameworks: React, ElectronJs
- Communication: RabbitMQ
- Architecture: Service-Oriented Architecture (SOA)
- Infrastructure: AWS, Terraform, Ansible, Docker, Mesos/Marathon, Consul, Nginx, GoCD CI/CD, Prometheus, Kibana, Grafana
Benefits offered:
- 27 days of annual paid holiday in addition to bank holidays.
- Progressively accrued Seniority Days providing additional paid time off (up to three years).
- Comprehensive medical and dental coverage, including audiology and optical benefits.
- Specialized support programs like menopause assistance and vital diagnostic services.
- Generous pension contribution matching.
- Employee well-being initiatives, such as mental health consultations and fitness subsidies.
- Learning and development opportunities sponsored by the company.
- Various social events and activities to engage employees.
Copper is committed to fostering diversity and equal opportunities within its team to enhance work quality through a blend of backgrounds and perspectives. The organization values inclusivity and encourages individuals to bring their unique experiences and skills to contribute to the company’s growth and innovation. Copper is an equal opportunity employer focusing on enhancing engagement between institutional investors and digital assets while also being a Disability Confident Employer, supporting applicants with disabilities.
If you believe you possess the qualifications we seek and more, we invite you to apply for this exciting opportunity.
Skills Required
Copper
Website
copper.coCompany size
Not specified
Location
United States
Description
Not specified
Status
xelora S
Senior solidity developer for our CritiQ project
New York, USA
New York, USA
Full time
Remote
We're currently building CritiQ, an innovative insurance platform.
It's an on-chain, parametric-first insurance solution designed to deliver fast, fair, and fully transparent coverage.
Our initial offerings include Flight Delay, Smart Contract Risk, and Commercial Property insurance, with plans to expand as oracle infrastructure develops.
It's an on-chain, parametric-first insurance solution designed to deliver fast, fair, and fully transparent coverage.
Our initial offerings include Flight Delay, Smart Contract Risk, and Commercial Property insurance, with plans to expand as oracle infrastructure develops.
Payment in Crypto
xelora S
senior solidity developer
New York, USA
New York, USA
Part time
Remote
We're currently building CritiQ, an innovative insurance platform.
It's an on-chain, parametric-first insurance solution designed to deliver fast, fair, and fully transparent coverage.
Our initial offerings include Flight Delay, Smart Contract Risk, and Commercial Property insurance, with plans to expand as oracle infrastructure develops.
It's an on-chain, parametric-first insurance solution designed to deliver fast, fair, and fully transparent coverage.
Our initial offerings include Flight Delay, Smart Contract Risk, and Commercial Property insurance, with plans to expand as oracle infrastructure develops.
Payment in Crypto
Alarab Company
Operator exchange
Giza, Egypt
Giza, Egypt
Full time
Remote
Exchange USD to USDT into crypto currency and USDT to USD and eur account.USD/ EUR/ to USDT/BTC/ BNB
Payment in Crypto
Travala
Senior Business Development Manager (Listings)
Full time
Remote
About Travala
Founded in 2017 and now backed by industry giant Binance, Travala is the leading crypto-native travel booking service, offering 2,200,000+ properties across 230 countries, 600+ airlines, 50,000+ car rental locations, and 400,000+ activities globally.
Travala is a champion of cryptocurrency adoption, accepting over 100 leading cryptocurrencies alongside traditional payment methods. In addition to unbeatable prices via its Best Price Guarantee, Smart members on Travala can also enjoy additional discounts and loyalty rewards for eligible bookings made on the platform.
By incorporating next-generation blockchain technology and tokenised loyalty rewards, Travala.com is creating a cutting-edge experience at the intersection of Web3 and travel.
About the Role
Travala.com is the world's leading Web3 travel booking platform, with AVA as its native utility token. We're hiring a Senior BD Manager to own new coin listings on Travala end-to-end — sourcing targets, pitching, negotiating, and closing deals. Listings may be structured as a traditional paid fee or as an in-kind token arrangement, decided deal by deal — the specific structure isn't the focus of this role, closing quality listings is.
This is a hunter role, not a strategist or management role. You'll have sales collateral and initial market research to build from - you're not starting from a completely blank page.
While this is a fully remote position, candidates based in the Asia-Pacific (APAC) region are preferred to align with working hours across our wider growth team and key internal departments, with flexibility for exceptional candidates in other locations.
Key Responsibilities
Own the full listing deal cycle: prospecting, outreach, pitching, negotiation, and closing - across paid listings and in-kind/token-based listing arrangements
Build and actively manage a prioritized pipeline of target projects, using our existing research as a starting point and expanding it over time
Represent Travala directly to token project founders, BD leads, and treasury teams to pitch new listings
Negotiate commercial terms within approved guardrails, and manage the process through to signature
Keep leadership updated on pipeline status, deal velocity, and market feedback on our listing offering
Build strategic token partner relationships to drive revenue, while identifying broader ecosystem or co-marketing leads for internal teams.
Act as primary BD liaison for internal teams (product, legal, marketing, finance) to coordinate workflows, documentation, and compliant token integration.
Research and stay up to date with cryptocurrency market trends, emerging tokens, and innovative blockchain projects to identify potential listing opportunities.
What's Not in Scope
To keep this role focused and avoid overlap with our marketing team, the following sit outside this role:
Post-signature announcements, co-marketing, and campaign work - owned by our CMO's team once a deal is signed.
Broader strategic partnerships beyond listings (e.g. major platform integrations) - owned separately.
Managing other BD staff -this is an individual contributor role, not a management position.
What You'll Have From Day One
Sales collateral and initial market research to support outreach and pipeline-building
Direct access to leadership for deal support and approvals - no bureaucratic layers slowing down a close
Requirements
5+ years of professional experience in business development or sales within the blockchain or cryptocurrency industry.
Deep understanding of Web3, including tokenomics, crypto payments, wallets, and market trends.
Genuine Web3/crypto BD experience - you already understand how token teams evaluate exchange listings and partnership offers.
Existing relationships in the space are a critical component - warm pipeline beats cold outreach.
Senior enough to run a full deal cycle independently, without needing management oversight at each step.
Genuinely commission-motivated. This role is structured for someone who wants their effort and results to show up directly in their paycheck - not someone seeking a flat, low-variability package.
Strong sales instincts and comfort with rejection - this is a quota-driven, outbound-heavy role.
Not looking for a “Head of BD” or management title - this is a hands-on, deal-closing role by design.
Exchange-side experience (Preferred): Prior experience on a listings/BD team at a crypto exchange is a strong plus - you understand how listing conversations and decisions actually get made from the other side of the table.
Benefits
Compensation: Competitive Base Salary + Uncapped Commission, depending on experience. Candidates with direct exchange-side listings experience would sit at the top of this range.
Travel Perks: Access to Smart Platinum tier on Travala.com for exclusive discounts and rewards.
Work-Life Balance: Remote working mode within a dynamic, high-performing international team culture.
Flexible Engagement Models: We offer tailored contracting or employment structures depending on your jurisdiction and location (to be discussed during the interview process).
Growth: Dedicated annual budget for courses, certifications, and tech conferences.
Web3 & Tech Exposure: Direct exposure to cutting-edge and trending technologies across Blockchain, Web3, FinTech, and real-world crypto adoption.
Premium Work Tools: High-end MacBook and necessary peripherals.
Founded in 2017 and now backed by industry giant Binance, Travala is the leading crypto-native travel booking service, offering 2,200,000+ properties across 230 countries, 600+ airlines, 50,000+ car rental locations, and 400,000+ activities globally.
Travala is a champion of cryptocurrency adoption, accepting over 100 leading cryptocurrencies alongside traditional payment methods. In addition to unbeatable prices via its Best Price Guarantee, Smart members on Travala can also enjoy additional discounts and loyalty rewards for eligible bookings made on the platform.
By incorporating next-generation blockchain technology and tokenised loyalty rewards, Travala.com is creating a cutting-edge experience at the intersection of Web3 and travel.
About the Role
Travala.com is the world's leading Web3 travel booking platform, with AVA as its native utility token. We're hiring a Senior BD Manager to own new coin listings on Travala end-to-end — sourcing targets, pitching, negotiating, and closing deals. Listings may be structured as a traditional paid fee or as an in-kind token arrangement, decided deal by deal — the specific structure isn't the focus of this role, closing quality listings is.
This is a hunter role, not a strategist or management role. You'll have sales collateral and initial market research to build from - you're not starting from a completely blank page.
While this is a fully remote position, candidates based in the Asia-Pacific (APAC) region are preferred to align with working hours across our wider growth team and key internal departments, with flexibility for exceptional candidates in other locations.
Key Responsibilities
Own the full listing deal cycle: prospecting, outreach, pitching, negotiation, and closing - across paid listings and in-kind/token-based listing arrangements
Build and actively manage a prioritized pipeline of target projects, using our existing research as a starting point and expanding it over time
Represent Travala directly to token project founders, BD leads, and treasury teams to pitch new listings
Negotiate commercial terms within approved guardrails, and manage the process through to signature
Keep leadership updated on pipeline status, deal velocity, and market feedback on our listing offering
Build strategic token partner relationships to drive revenue, while identifying broader ecosystem or co-marketing leads for internal teams.
Act as primary BD liaison for internal teams (product, legal, marketing, finance) to coordinate workflows, documentation, and compliant token integration.
Research and stay up to date with cryptocurrency market trends, emerging tokens, and innovative blockchain projects to identify potential listing opportunities.
What's Not in Scope
To keep this role focused and avoid overlap with our marketing team, the following sit outside this role:
Post-signature announcements, co-marketing, and campaign work - owned by our CMO's team once a deal is signed.
Broader strategic partnerships beyond listings (e.g. major platform integrations) - owned separately.
Managing other BD staff -this is an individual contributor role, not a management position.
What You'll Have From Day One
Sales collateral and initial market research to support outreach and pipeline-building
Direct access to leadership for deal support and approvals - no bureaucratic layers slowing down a close
Requirements
5+ years of professional experience in business development or sales within the blockchain or cryptocurrency industry.
Deep understanding of Web3, including tokenomics, crypto payments, wallets, and market trends.
Genuine Web3/crypto BD experience - you already understand how token teams evaluate exchange listings and partnership offers.
Existing relationships in the space are a critical component - warm pipeline beats cold outreach.
Senior enough to run a full deal cycle independently, without needing management oversight at each step.
Genuinely commission-motivated. This role is structured for someone who wants their effort and results to show up directly in their paycheck - not someone seeking a flat, low-variability package.
Strong sales instincts and comfort with rejection - this is a quota-driven, outbound-heavy role.
Not looking for a “Head of BD” or management title - this is a hands-on, deal-closing role by design.
Exchange-side experience (Preferred): Prior experience on a listings/BD team at a crypto exchange is a strong plus - you understand how listing conversations and decisions actually get made from the other side of the table.
Benefits
Compensation: Competitive Base Salary + Uncapped Commission, depending on experience. Candidates with direct exchange-side listings experience would sit at the top of this range.
Travel Perks: Access to Smart Platinum tier on Travala.com for exclusive discounts and rewards.
Work-Life Balance: Remote working mode within a dynamic, high-performing international team culture.
Flexible Engagement Models: We offer tailored contracting or employment structures depending on your jurisdiction and location (to be discussed during the interview process).
Growth: Dedicated annual budget for courses, certifications, and tech conferences.
Web3 & Tech Exposure: Direct exposure to cutting-edge and trending technologies across Blockchain, Web3, FinTech, and real-world crypto adoption.
Premium Work Tools: High-end MacBook and necessary peripherals.
portal sever
Social Media & Community Specialist — Web3 Gaming
United Downs, UK
United Downs, UK
Full time
Remote
Join Portal Sever and help us build a community around a growing Web3 game.
Portal Sever is a Web3 gaming project combining online gaming, digital ownership, and blockchain-powered experiences. We are looking for a Social Media & Community Specialist who understands crypto culture, knows how online communities work, and can turn content, conversations, and ideas into real community growth.
This isn't a role where you'll simply schedule posts. You'll have the freedom to experiment with content, develop our social presence, interact directly with players and crypto users, launch community activities, and help shape the public voice of Portal Sever.
If you spend time on X/Twitter, Telegram, Discord, Reddit, Web3 communities, gaming communities, or crypto media, we'd love to hear from you.
What you'll do
Manage and grow Portal Sever's social media and community channels, primarily X/Twitter, Telegram and Discord, while exploring other relevant platforms.
Create engaging content around the game, Web3, crypto gaming, product updates, community news, memes, announcements, and industry trends.
Build genuine relationships with players, community members, creators, influencers, and other Web3 projects.
Develop ideas and campaigns designed to increase followers, engagement, community activity, and player acquisition.
Organize community events such as AMAs, contests, giveaways, game activities, collaborations, and community discussions.
Keep conversations active instead of simply publishing posts and waiting for engagement.
Identify relevant trends early and turn them into timely content opportunities.
Monitor community feedback and communicate useful insights to the product and marketing teams.
Help establish Portal Sever's tone of voice and make the brand recognizable across Web3.
Research competitors, GameFi projects, gaming communities, and emerging platforms to identify new growth opportunities.
Experiment with new formats and ideas and analyze what actually works.
What we're looking for
Experience managing social media, online communities, gaming communities, crypto communities, or digital brands.
Strong understanding of Web3, cryptocurrency, blockchain, GameFi, or online gaming.
Good knowledge of X/Twitter, Telegram and Discord and how content performs differently across each platform.
Ability to communicate naturally in English with an international audience.
Strong writing skills and the ability to turn an idea or update into engaging social content.
Understanding of crypto culture, memes, trends, and community behavior.
Ability to work independently without needing detailed instructions for every task.
Comfortable communicating directly with users and handling both positive and negative feedback.
Creative mindset and willingness to test unconventional ideas.
Reliable, organized, and able to work remotely.
Nice to have
Experience with any of the following is a strong advantage: Web3 gaming, GameFi, NFT communities, gaming projects, influencer outreach, partnerships, community launches, viral content, Reddit, TikTok, YouTube, or short-form video.
Previous experience at a crypto exchange, blockchain company, Web3 startup, gaming studio, or crypto media project is welcome but not mandatory.
Why join Portal Sever?
You'll join a growing project at a stage where your ideas can have a visible impact.
We offer:
Fully remote work
Flexible working environment
A global Web3 and gaming audience
Freedom to propose and test your own ideas
Direct influence on the project's community and brand
Opportunity to grow together with the project
Exposure to the rapidly developing Web3 gaming industry
Long-term cooperation for strong performers
We care more about what you can create and grow than about formal titles or years spent in a corporate marketing department.
If you've built a community, managed a social account, created content that people actually engaged with, or simply understand how to attract attention in Web3, we want to hear from you.
When applying, please include:
A short introduction about yourself
Links to social media accounts or communities you've managed, if available
Your experience with Web3, crypto, or gaming
One or two ideas you would try to grow the Portal Sever community
Even if you don't match every requirement, feel free to apply if you believe you can bring value to the project.
Portal Sever is a Web3 gaming project combining online gaming, digital ownership, and blockchain-powered experiences. We are looking for a Social Media & Community Specialist who understands crypto culture, knows how online communities work, and can turn content, conversations, and ideas into real community growth.
This isn't a role where you'll simply schedule posts. You'll have the freedom to experiment with content, develop our social presence, interact directly with players and crypto users, launch community activities, and help shape the public voice of Portal Sever.
If you spend time on X/Twitter, Telegram, Discord, Reddit, Web3 communities, gaming communities, or crypto media, we'd love to hear from you.
What you'll do
Manage and grow Portal Sever's social media and community channels, primarily X/Twitter, Telegram and Discord, while exploring other relevant platforms.
Create engaging content around the game, Web3, crypto gaming, product updates, community news, memes, announcements, and industry trends.
Build genuine relationships with players, community members, creators, influencers, and other Web3 projects.
Develop ideas and campaigns designed to increase followers, engagement, community activity, and player acquisition.
Organize community events such as AMAs, contests, giveaways, game activities, collaborations, and community discussions.
Keep conversations active instead of simply publishing posts and waiting for engagement.
Identify relevant trends early and turn them into timely content opportunities.
Monitor community feedback and communicate useful insights to the product and marketing teams.
Help establish Portal Sever's tone of voice and make the brand recognizable across Web3.
Research competitors, GameFi projects, gaming communities, and emerging platforms to identify new growth opportunities.
Experiment with new formats and ideas and analyze what actually works.
What we're looking for
Experience managing social media, online communities, gaming communities, crypto communities, or digital brands.
Strong understanding of Web3, cryptocurrency, blockchain, GameFi, or online gaming.
Good knowledge of X/Twitter, Telegram and Discord and how content performs differently across each platform.
Ability to communicate naturally in English with an international audience.
Strong writing skills and the ability to turn an idea or update into engaging social content.
Understanding of crypto culture, memes, trends, and community behavior.
Ability to work independently without needing detailed instructions for every task.
Comfortable communicating directly with users and handling both positive and negative feedback.
Creative mindset and willingness to test unconventional ideas.
Reliable, organized, and able to work remotely.
Nice to have
Experience with any of the following is a strong advantage: Web3 gaming, GameFi, NFT communities, gaming projects, influencer outreach, partnerships, community launches, viral content, Reddit, TikTok, YouTube, or short-form video.
Previous experience at a crypto exchange, blockchain company, Web3 startup, gaming studio, or crypto media project is welcome but not mandatory.
Why join Portal Sever?
You'll join a growing project at a stage where your ideas can have a visible impact.
We offer:
Fully remote work
Flexible working environment
A global Web3 and gaming audience
Freedom to propose and test your own ideas
Direct influence on the project's community and brand
Opportunity to grow together with the project
Exposure to the rapidly developing Web3 gaming industry
Long-term cooperation for strong performers
We care more about what you can create and grow than about formal titles or years spent in a corporate marketing department.
If you've built a community, managed a social account, created content that people actually engaged with, or simply understand how to attract attention in Web3, we want to hear from you.
When applying, please include:
A short introduction about yourself
Links to social media accounts or communities you've managed, if available
Your experience with Web3, crypto, or gaming
One or two ideas you would try to grow the Portal Sever community
Even if you don't match every requirement, feel free to apply if you believe you can bring value to the project.
Payment in Crypto