Quality Assurance Engineer (Mid - Senior)
About us:
B2C2 is a digital asset pioneer focusing on building future-proof ecosystems. The firm enables institutional access to crypto through reliable liquidity services regardless of market conditions. Its success stems from utilizing crypto-native technology, continuous product innovation, and serving as a trusted partner for various institutions globally. Established in 2015, and acquired by SBI, a Japanese financial group in 2020, B2C2 operates independently. Headquartered in the UK, with additional offices in the US and Japan, B2C2 OTC Ltd. holds authorization and regulation by the UK’s Financial Conduct Authority (FRN 810834).
We take pride in our company culture and knack for attracting top talent aligned with our values. If you seek a role in a dynamic company within a burgeoning industry, continue reading.
*
B2C2 stands out as a leading cryptocurrency trading firm, acting as a principal risk market maker to both exchanges and OTC clients. The mission is to enhance transparency and operational efficiencies within this evolving asset class.
By bridging traditional financial and cryptocurrency markets, B2C2 is the trusted liquidity provider for brokerages, exchanges, banks, and fund managers, with a globally dispersed team possessing extensive expertise in conventional financial and crypto markets.
Emphasizing company culture and the ability to bring in not only top-tier talent but the right individuals, we welcome those looking to be part of an exciting industry at a vibrant company.
Overview of Team:
The Quality Assurance team is dedicated to offering engineer-focused testing services with a skilled, small team covering all front and middle office systems and process testing utilizing automation for efficient testing and enhanced quality.
Collaborating across technology, trading, and various business units, we develop tools and processes essential for B2C2 to sustain innovation swiftly and create industry-leading systems for both clients and internal use.
Scope of Role:
As a quality assurance engineer, your duties will involve contributing to constructing strategic functional and non-functional test frameworks and tools while prioritizing release and project testing requirements.
Additionally, as part of multiple agile teams and the QA horizontal, close collaboration with developers and business stakeholders is essential. This role will work towards satisfying internal quality assurance objectives as well as meeting the visibility testing needs of both internal and external stakeholders such as the risk team and regulators.
Key Responsibilities:
- Maintain and review regression test packs
- Contribute to developing tooling and test frameworks for functional and non-functional testing
- Take ownership of testing and quality assurance for one or more project teams concurrently
- Deliver system and system integration testing for releases
- Support user acceptance testing (UAT) for high-risk projects
- Create automated tests to evaluate new and existing systems and developments
- Present testing reports to project stakeholders to facilitate testing sign-off and project conclusion
- Aid the support and development teams in diagnosing and investigating production issues and testing subsequent fixes
- Assist the head of QA in organizing and managing business-focused manual test cases and maintaining automated test cases
The list above does not include all responsibilities, and tasks can change based on evolving roles within the company and broader business objectives of B2C2.
Mandatory Skills:
- Designing test automation frameworks for intricate systems
- Java proficiency and developing Java-based test automation frameworks
- Establishing and utilizing tooling for non-functional testing
- Analyzing tests and creating test cases with a risk-focused approach
- Investigating complex issues across a system stack
Preferred Skills:
- Conducting test automation using Cucumber to define test cases, including UI automation
- Proficiency in Python and Rust, adaptable to learning and working with other languages
- Applying test analysis to high-frequency trading systems with focus on functionality and non-functionality
- Proficiency in KDB, Q, AWS, and Kubernetes
- Understanding of trading and middleware protocols and technologies, such as Redis, FIX protocol, REST APIs, and Websockets
- Keen interest in trading systems and cryptocurrency
At B2C2, a strong culture underpins our success. We are an ambitious, innovative, meritocratic, collegiate, and risk-aware organization, striving for excellence in all aspects.
Equal Employment Opportunities Policy:
B2C2 upholds a commitment to equal employment opportunities for applicants and employees across various backgrounds. Discrimination based on race, color, religion, gender, national origin, age, disability, genetic information, marital status, or any other protected category is strictly prohibited. The company fosters an inclusive environment to attract, engage, promote, and retain the best talent by offering flexible working arrangements for its employees.
Marketing Manager in 10 arx
About 10arx
10arx is an AI-native trading terminal for prediction markets. We aggregate Polymarket, Kalshi, and other exchanges into one professional-grade interface - smart market discovery, AI analytics, agentic automation, advanced execution, and a fully customizable dashboard.
We are building for serious traders - people who trade systematically and want a real edge. This is not a product for casual users. The technical team is in place. Now we are building product and growth.
The role
You are the first person responsible for all of growth. There are no existing processes. No team that already figured it out. You build everything from zero - strategy, channels, agency management, influencer partnerships, and the team itself.
This is not a support role. This is not a social media manager role. You own the entire growth function with full accountability.
What you will own
Go-to-market strategy. Build the full pre-launch and launch plan. Own the budget, justify every line of spend, and report results. Structure and accountability - not guesswork and vibes.
Influencer and KOL partnerships. Identify the right people in the prediction markets and crypto trading community. Build real long-term relationships - not one-off paid posts. We want people who actually trade on platforms like ours and talk about it authentically.
Agency management. Set briefs, control results, don't let agencies run in "report-for-show" mode. Know what you are paying for and defend every decision to the founder in two sentences.
Hiring and building the marketing team. Close the SMM role yourself - write the JD, run interviews, onboard, and build a working system. You define how the team operates.
Community and content. Own the brand voice across Twitter/X, Telegram, and Discord. Build a genuine community around prediction markets - not just manage accounts. In the early days you post yourself, daily. You engage. You make 10arx impossible to ignore in the prediction markets space.
Pre-launch activation. Build the waitlist, create pre-launch momentum, and get the first 1K traders into the product before public release. The core audience needs to exist from day one.
AI-powered marketing systems. Build and run AI agent workflows for growth: automated prospect research, influencer pipeline tracking, content generation pipelines, performance monitoring. If something can be delegated to an AI agent - it should be. This is a core part of the role, not a bonus.
Analytics and retention. Track CAC, funnel conversion, influencer ROI. Own email and Telegram retention flows. Traders leave fast if they don't see value - keeping them is your job too.
Partnerships and BD. Build integrations and co-marketing with projects in the Polymarket and prediction markets ecosystem. Access to existing audiences - not ads.
What we are looking for
You actively trade or closely follow prediction markets and know the trading community from the inside - Polymarket, Kalshi, or similar
You have built or grown a crypto Twitter/X account or Telegram community with measurable results you can show us - not just assisted, but owned it
You have real experience with crypto, Web3, or fintech influencers - not just sending pitches, but building real long-term relationships or a proven method for doing it fast
You have managed or allocated a marketing budget before and can defend every line of spend with data
You have managed agencies: you know what to ask, how to measure results, and where they tend to waste money
You have built a marketing function or team from zero - and you can do it again
You think in systems: you see the full funnel, not individual posts and campaigns
You actively use AI tools - you automate research, build agent workflows, and delegate routine systematically
You can work independently without being managed - we are a small founding team and you will own this function completely
You are proactive, fast, and comfortable operating in a space that moves every hour
Nice to have
You trade on Polymarket or other prediction markets yourself
You have an existing network of crypto traders, KOLs, or analysts
You have launched products in Web3 or fintech from zero
You understand the Polymarket Builders program and builder rewards mechanics
You have grown an audience of serious traders - not mass retail
You have hands-on experience building AI agent pipelines for marketing or growth
Not a fit if
You don't know what a prediction market is and have never traded - this is not a space where you can figure it out later
Your entire influencer experience is e-commerce or lifestyle - crypto and trading audiences work completely differently
You are used to receiving briefs and executing - here you create the strategy yourself
Your growth metrics are follower counts and impressions - we care about traders in the product, not numbers in a report
You think AI tools are for writing captions - we expect full agent workflows, not prompts in ChatGPT
What we offer
Competitive compensation based on experience - discussed individually
Performance bonuses tied directly to active trader growth and platform volume milestones
Full ownership of the growth function from day one - no bureaucracy, no approvals chain
Small founding team, direct line to the founder, decisions made fast
You are building in a market that is genuinely growing
Apply here https://form.jotform.com/261053816290050
Content Creator
Content Creator ⭐ /
Part-time /
Web3 · AI · Crypto
Apply for this job
About us
Lunacom is an AI-powered platform that analyzes crypto and on-chain data to deliver clear, actionable insights.
We help users identify opportunities, track market trends, and make smarter decisions - faster and with less noise.
Responsibilities:
Create engaging and high-quality content for social media platforms (X, TikTok, blogs) with a focus on crypto and AI topics
Write threads, posts, and short-form content that clearly explain complex ideas in a simple and engaging way
Adapt content for different platforms and audiences while maintaining a consistent and recognizable brand voice
Analyze content performance using basic metrics and continuously optimize based on data and audience response
Requirements:
Experience in content creation (written, video, or social media) with a strong focus on clarity and engagement
Strong writing and communication skills with the ability to break down complex Web3/AI topics
Basic experience with editing tools such as Canva, CapCut, or similar content creation software
Proactive, creative, and self-driven mindset with genuine interest in Web3, crypto, and AI
Contact:
Telegram @lunacom_io
Email: hello@lunacom.io
Business Development (Vietnam)
Senior DevRel Engineer
In this role, you will work closely with developers who integrate our smart contracts, APIs, and protocols. Your mission is to make complex systems understandable, integrations smooth, and feedback actionable for the core engineering team.
Responsibilities
• Support developers integrating our protocols and APIs
• Create clear technical content such as guides, examples, demos, and reference implementations
• Act as a technical bridge between the developer community and internal product and engineering teams
• Identify recurring integration issues and help improve tooling and documentation
• Represent the protocol in technical discussions, workshops, hackathons, and conferences
• Collaborate with ecosystem partners such as wallets, DeFi apps, and infrastructure providers
Qualifications
• Practical experience with Solidity and smart contract interaction
• Strong understanding of DeFi concepts and Ethereum based systems
• Ability to explain complex technical topics in a clear and structured way
• Experience working with developers or technical communities
• Comfort reading and reasoning about production smart contracts, security considerations, and gas efficiency
Why You’ll Love Working With Us
• Join a young, creative team in a fast-paced and supportive environment
• We’re open to new ideas if you’ve got a vision, pitch it and make it happen
• Enjoy competitive pay that matches your skills and experience
• Be part of a company that’s shaping the future of DeFi
• Take time when you need it we offer unlimited vacation days
• Get fully compensated for your work gear we’ll set you up for success
• Travel with us! We host an annual team retreat at a top international location
Hiring Process
• Test assignment: a practical exercise relevant to the role
• Technical interview: to discuss your solution, skills, and problem-solving
• HR interview: to talk about culture fit, expectations, and the role
Why this role matters
You will directly shape how developers experience the protocol. Your work will influence adoption, integration quality, and long term ecosystem growth by making powerful technology accessible and reliable for others to build on.
You don’t need to meet every requirement to apply - don’t worry. We value potential, motivation, and willingness to learn just as much as experience.
If this role excites you, we’d love to hear from you.
🚀 Hiring Solana Developers – Pump.fun
Hi,
I’m reaching out from Valiant Solution LLC. We’re currently working with a U.S.-based client who is an experienced crypto professional and we’re looking for a skilled Solana developer to help build a platform similar to Pump.fun.
We already have a basic codebase from GitHub that the developer can start from, so the project will mainly involve customizing, improving, and completing the functionality rather than building everything from scratch.
Key requirements:
• Experience with Solana smart contracts (Rust / Anchor)
• Knowledge of token launch mechanics and bonding curves
• Experience with Solana Web3 integrations
• Ability to work with an existing codebase and extend it
If this sounds interesting, please reply with:
• Your Solana development experience
• Links to relevant projects or GitHub
• Your availability for a quick discussion
Looking forward to connecting.
Best regards,
Valiant Solution LLC