Smart Contract Engineer - Vac

About the Role
We’re looking for a Blockchain Engineer to explore and build new possibilities around RGB++, CKB, and Bitcoin.
RGB++ is built around the UTXO model, so this role is particularly suited to engineers who understand Bitcoin, UTXO-based systems, or similar protocol-level architectures and are interested in exploring what new ideas can be built from that foundation.
You’ll start with RGB++ — understanding what exists today, exploring what could come next, and turning promising ideas into tools, prototypes, or infrastructure that other developers can build on.
RGB++ Protocol : https://rgbpp.com/
RGB++ GitHubRGB++ on GitHub : https://github.com/RGBPlusPlus
What You'll Do
Explore new technical and product possibilities around RGB++, CKB and Bitcoin.
Build prototypes, tools, SDKs, integrations or infrastructure to test promising ideas.
Improve the developer experience around RGB++ and related technologies.
Work with external developers, helping them understand and build on what we create.
Contribute to and collaborate with the open-source ecosystem.
Work with existing RGB++ infrastructure and contribute to its ongoing development where needed.
Share your experiments, learnings and technical thinking with the team and developer community.
What We're Looking For
Solid blockchain fundamentals and experience working beyond application-level development.
Strong hands-on engineering ability with Rust and/or JavaScript/TypeScript.
Ability to take an idea from exploration to something tangible without needing a detailed specification.
Enjoy figuring out what should be built, not only how to build it.
Strong interest in Bitcoin, blockchain infrastructure, and protocol-level innovation.
An open-source mindset and comfort building things that other developers can use and extend.
Self-driven and comfortable working independently in a remote environment.
Comfortable communicating in Chinese, with sufficient written English to read technical documentation and communicate asynchronously
Nice to Have
Hands-on experience with Bitcoin, UTXO-based systems, or other UTXO-based protocols
CKB / RGB++ experience
L1/L2 or blockchain infrastructure development experience
Systems or embedded engineering background
Meaningful open-source contributions or strong public technical projects
Why This Role
This isn't a role where you'll spend your time working through a predefined backlog. You'll start with RGB++, but you'll have room to explore broader possibilities around CKB and Bitcoin, develop your own ideas, and turn the most interesting ones into something real.
You'll be building in the open, with the opportunity to create tools and infrastructure that other developers can use and extend. We care less about titles or years of experience than whether you're curious, self-driven, technically capable, and excited to figure out what should be built next.
How to Apply
Interested? Send your application to join@ckba.build with:
A brief introduction about yourself and why this role interests you
Your resume or LinkedIn profile
Links to your GitHub, open-source contributions, or projects you’ve built
Perks & Work Environment
Remote & Flexible — Work from anywhere with a globally distributed team.
Flexible Time Off — 15 days of time off + public holidays based on your location.
AI & Tooling Support — Budget for AI and productivity tools that help you work better.
In-person Gatherings — Opportunities to meet and build together through team gatherings and ecosystem events.

Web3 Market Maker & Liquidity Manager
Company: UTOPOS
Location: Remote (Worldwide)
Compensation: Negotiable (USDC, UTOP, or a combination)
About UTOPOS
UTOPOS is a blockchain ecosystem building the future of decentralized commerce, gaming, payments, sports, and smart city infrastructure. UTOP is the ecosystem's native digital currency, designed for real-world utility across multiple platforms.
We are seeking an experienced Web3 Market Maker & Liquidity Manager to help improve the trading experience and liquidity of the UTOP token while supporting the long-term growth of the ecosystem.
Responsibilities
Develop and execute market-making strategies for UTOP.
Monitor liquidity pools and trading activity across supported decentralized exchanges.
Improve bid/ask spreads and market depth.
Recommend liquidity allocation strategies.
Monitor trading volume, volatility, and order book health.
Identify opportunities to improve trading efficiency.
Prepare regular reports on market performance and liquidity metrics.
Coordinate with the UTOPOS team on exchange listings and liquidity initiatives.
Recommend best practices for sustainable token liquidity.
Requirements
Experience as a market maker, liquidity manager, or professional crypto trader.
Strong understanding of decentralized exchanges and automated market makers.
Experience with Uniswap, Polygon, and EVM-compatible ecosystems.
Knowledge of liquidity pool management and tokenomics.
Familiarity with on-chain analytics tools.
Strong analytical and quantitative skills.
Ability to work independently in a remote environment.
Preferred Qualifications
Experience supporting emerging blockchain projects.
Understanding of treasury management.
Experience with algorithmic trading or market-making tools.
Knowledge of cross-chain liquidity strategies.
Familiarity with Web3 analytics platforms.
Compensation
Compensation is negotiable and may include:
Fixed monthly compensation.
Performance-based incentives.
Payment in USDC, UTOP, or a mutually agreed combination.
How to Apply
Please include:
A brief introduction.
Your relevant market-making or liquidity management experience.
Blockchain projects you have supported.
Exchanges and protocols you have worked with.
Examples of measurable results you achieved.
Your preferred compensation structure.
Important: UTOPOS seeks to maintain fair, transparent, and orderly markets. Applicants should have experience with legitimate market-making and liquidity management practices. Any strategies involving market manipulation, wash trading, spoofing, or other deceptive trading activities will not be considered.

Business Development & Marketing Representative (Commission-Based)
Company: UTOPOS
Location: Remote (Worldwide)
Compensation: Commission-Based (Paid in UTOP)
About UTOPOS
UTOPOS is building a decentralized ecosystem that connects blockchain technology with commerce, gaming, sports, payments, and future smart city development. UTOP is the ecosystem's native digital currency, designed for use across multiple products and services.
We are expanding globally and are looking for motivated Business Development & Marketing Representatives to help grow the UTOPOS ecosystem.
Responsibilities
Promote awareness of the UTOPOS ecosystem.
Introduce individuals, communities, and businesses to UTOP.
Build relationships with blockchain communities, influencers, and strategic partners.
Generate qualified leads for partnerships and business opportunities.
Identify merchant adoption opportunities.
Assist with community growth across social media and Web3 platforms.
Represent UTOPOS professionally in online and offline communities.
Compensation
This is a commission-based opportunity.
Representatives earn commissions in UTOP based on qualified business generated for the UTOPOS ecosystem. Commission terms will be provided during onboarding and are paid only after qualifying milestones have been successfully completed.
Top performers may be offered long-term positions and leadership opportunities as UTOPOS expands globally.
Qualifications
Experience in marketing, sales, or business development.
Interest in blockchain, cryptocurrency, or Web3.
Strong communication skills.
Self-motivated and results-oriented.
Ability to work independently.
Existing crypto or business network is a plus but not required.
What We're Looking For
We're seeking individuals who enjoy building communities, creating partnerships, and helping grow innovative blockchain ecosystems. This is an opportunity to participate in the growth of a long-term project while earning performance-based rewards.
Important
Representatives are expected to communicate accurately about UTOPOS and UTOP. Misleading statements, guarantees of profits, or investment promises are strictly prohibited. All marketing must be factual and professional.
If you're passionate about Web3 and business development and want to help build the future of decentralized commerce, we'd love to hear from you.

I am Sadr, CEO of Oferli. We are building a high-performance, elite technical team, and I am looking for 5 to 10 dedicated founding technical partners to join me in this mission.
​The Vision:
Oferli is a 100% decentralized ecosystem. While we are rooted in Web3, our expertise spans across professional web and mobile application development. We are not just another agency; we are crafting the next generation of digital solutions. Our goal is to set a new standard for excellence, transparency, and decentralization.
​What I am looking for:
I am building a professional, senior-level "Elite Team." I am looking for partners who are truly passionate about the vision—not just short-term gains. By combining our individual expertise and portfolios, we will establish Oferli’s collective professional reputation.
​Requirements:
​Proven Expertise: You must be a senior-level professional. Please provide your portfolio showcasing your best work in web and mobile development.
​Commitment: This is a founding partnership. We are looking for those who believe in the mission and are ready to tackle complex challenges together.
​Professionalism: We operate with high standards. Communication and efficiency are key.
​How We Work:
​Collaboration: We use professional, secure channels for all communications. Qualified candidates will be contacted via email to be invited to our private workspace on Notion to align on our roadmap and launch our upcoming projects.
​Decentralized Operations: We leverage Web3 tools for collaboration and compensation, maintaining a fully decentralized environment.
​Growth: We are launching with a core team of at least 5 founding partners, scaling to 10, to deliver high-impact results for our clients.
​Application Process:
If you are a senior professional ready to build a world-class, decentralized ecosystem, apply here on LaborX. Qualified candidates will be contacted via email for further professional vetting and onboarding.
​Let’s build the future, together.
​Sadr B
CEO, Oferli

Merklio is developing a private order-book aggregator using zero-knowledge proofs. We need a ZK-Infrastructure Engineer to build our proof generation pipeline and optimize proving times for complex circuits.
Expectations:
Design and implement circuits for merkle membership and signature aggregation
Optimize witness generation and prover memory usage
Build a distributed prover system with load balancing
Reduce proving time from 30s to <5s using GPU acceleration
Collaborate with researchers on new polynomial commitment schemes
Write performance benchmarks and regression tests
Deploy provers as microservices on Kubernetes
Maintain a devnet for testing with real transaction data
Contribute to open-source ZK libraries (e.g., gnark, arkworks)
Nice to have:
Experience with MPC (multi-party computation)
Knowledge of TLSNotary or ZKEmail
Published papers or talks at ZK conferences
Chinese+English language proficiency