blockchain engineer

Simcoe IT

Company DescriptionVulSight is a web3 cybersecurity startup specializing in Penetration Testing, Web3 security, smart-contracts auditing and verification. We help teams ship safely across Move, Rust, and EVM ecosystems.Role DescriptionWe&rsquo;re building AI-powered tooling for Web3 audits and need a senior engineer to own the blockchain layer&mdash;smart contracts, node/indexing infra, and on-chain integrations that feed our models and products. Security expertise is a plus but not required. We care most about your ability to ship robust blockchain systems.Qualifications<ul><li>5+ years in backend/systems/software; 3+ years shipping on-chain (Aptos/Sui, Rust, EVM).</li><li>Strong in Rust (preferred for Solana/Aptos/Sui) or TypeScript/Go (EVM + infra).</li><li>Experience with indexers and Postgres.</li><li>Comfort with nodes/RPC/mempool mechanics and production ops.</li><li>Clear, pragmatic communication and ownership mindset.</li><li>Tooling chops: Foundry/Hardhat, Aptos/Sui CLI, Pyth/Chainlink consumers.</li></ul>Nice to Have<ul><li>Experience of all three: Move, Rust and EVM.</li><li>Familiarity with cryptography primitives, ABI/BCS, and data streaming.</li><li>Knowledge of security vulnerabilities in blockchain applications</li></ul>Job Type: Full-timePay: Rs400,000.00 - Rs600,000.00 per monthWork Location: In person

Senior Blockchain Engineer

Halliday

<div>
 
 About Halliday
 
 
 
 Halliday is a blockchain company and product lab working to create a unified, cross-chain payments ecosystem. Its flagship product, Halliday Payments, is a unified payments platform that makes it easy for users to onramp, swap, and take other onchain actions. Halliday&rsquo;s products are built on the Workflow Protocol, which removes the need to code smart contracts by hand and enables breakthrough applications to ship in hours, not years.
 
 
 Backed by a16z and #Hashed, Halliday has worked with prominent developers such as ApeChain, Story Protocol and DeFi Kingdoms to provide seamless experiences for both developers and users. The team includes alumni from Stanford, Harvard, Compound, Solana Foundation, Meta, Netflix, and more.
 
 
 
 About The Role
 
 
 
 As a Software Engineer at Halliday, you&rsquo;ll play a pivotal role in designing and building the core infrastructure driving the future of commerce. This is an opportunity to work on cutting edge technology that makes blockchain accessible, seamless, and secure, while collaborating with a talented and passionate team.
 
 
 
 What You'll Be Doing
 
 
 
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 Architect and build secure distributed systems that integrate blockchains, cryptography, decentralized finance, zero knowledge proofs, and many other bleeding edge technologies.
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 Develop scalable services, APIs, and robust testing frameworks to support our platform.
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 Utilize open-source blockchain SDKs to interact with various networks, protocols, and smart contracts.
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 Contribute to the development and refinement of Halliday&rsquo;s public SDKs, making it easy for developers to integrate with our services.
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 Collaborate with cross-functional teams, including design, product, engineering, and business to build impactful solutions that advance the web3 ecosystem.
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 Innovate and expand on our foundational cross-chain protocol.
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 Continuously identify and implement improvements to enhance our platform's performance, security, and scalability.
 
 
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 What We&rsquo;re Looking For
 
 
 
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 Experience as a software engineer, demonstrated through impactful projects such as developing scalable applications, building robust APIs, or contributing to widely-used libraries and frameworks.
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 A quick learner with a passion for exploring new technologies and creating innovative solutions.
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 A collaborative mindset and excellent problem-solving skills.
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 Located in or willing to relocate to the San Francisco Bay Area or New York City.
 
 
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 Nice to haves
 
 
 
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 Experience working with blockchain technologies, including EVM-based chains, Bitcoin, and/or Solana.
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 Solid understanding of blockchain concepts, including smart contracts, cryptography, and decentralized applications.
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 Familiarity with modern web services, cloud infrastructure, containerization, and deployment pipelines.
 
 
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 Why Work at Halliday?
 
 
 
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 A role with significant autonomy to build out the next generation infrastructure of the blockchain space.
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 Competitive compensation package, with unlimited PTO and a friendly work environment.
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 For international candidates - we offer visa sponsorship!
 
 
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 Compensation
 
 
 
 The base salary range for this role is $150,000 - $190,000. This reflects the minimum and maximum range across all US locations. This does not include equity or benefits.
 
 
 The actual base pay is dependent upon many factors, such as: experience, relevant skills, and role level. Your recruiter can share more about the compensation and benefits applicable to your location during the hiring process.
</div>

Software Engineer

Asula Labs

<div><h2 class="jobSectionHeader">About Us</h2>
Asula is a bitcoin company focused on building the next generation of financial products at the intersection of bitcoin, blockchains, stablecoins and finance. 
 
Currently we&rsquo;re working on Dawn, our mobile interface that allows users to save and grow their assets through bitcoin and stablecoins. Beyond Dawn, we're working on making bitcoin swaps and credit available to holders of all sizes through onchain protocols.<h2 class="jobSectionHeader">
Role</h2>
For this role we're seeking a generalist who can work across the backend stack to bring our products to life. A candidate in this role would be expected to:<ul><li>
Design and implement backend systems that power both user-facing applications (like Dawn) and core protocol components.</li><li>
Architect scalable and resilient services: APIs, stateful services, and blockchain data pipelines that can handle real-world demand.</li><li>
Drive large-scale architectural improvements to the codebase and develop best practices in a nascent organization.</li><li>
Mentor the rest of the team to improve long-term architecture and code quality.</li></ul><h2 class="jobSectionHeader">
Qualifications</h2><ul><li>
3+ years of experience as a systems engineer who has designed and operated production services with real traffic, ideally in finance, trading, or blockchain environments.</li><li>
A deep understanding of distributed systems, data modeling, and network architecture &mdash; you think in terms of latency, throughput, and fault tolerance.</li><li>
Fluent in at least one strongly-typed backend language (Rust, Go or C++) and comfortable working across frameworks, APIs, and infrastructure.</li><li>
An interest in bitcoin, blockchains and onchain finance.</li></ul><h2 class="jobSectionHeader"> 
Nice to haves</h2><ul><li>
Prior experience using stablecoins and/or bitcoin in your daily life.</li><li>
Prior experience building low-latency systems for trading.</li></ul></div>

Senior Software Engineer

Vtrade Capital Investments LLC

Blockchain Architect (10+ Years Experience)About UsWe are a fast-paced, innovative startup on a mission to revolutionize the world of finance and blockchain. Our team is building cutting-edge, intelligent systems that leverage artificial intelligence and machine learning to transform how people interact with decentralized technologies. Join us in shaping the future of AI-powered blockchain infrastructure.Job DescriptionWe are looking for a highly experienced Blockchain Architect to lead the design and implementation of next-generation blockchain infrastructure. The ideal candidate has 10+ years of experience in blockchain engineering, distributed systems, and protocol design &mdash; with a deep technical foundation across multiple public and private blockchains.You&rsquo;ll play a critical role in architecting scalable, secure, and interoperable blockchain systems, driving innovation in decentralized technology that bridges Web3, AI, and enterprise-grade infrastructure.Key Responsibilities<ul><li>Architect, design, and oversee the implementation of modular blockchain systems and supporting infrastructure.</li><li>Define and optimize on-chain and off-chain architecture, including consensus design, node infrastructure, and data flow.</li><li>Evaluate and integrate multiple blockchain frameworks (Solana, Ethereum, Polygon, Hyperledger, etc.) based on performance and use-case needs.</li><li>Lead protocol-level innovation, ensuring scalability, interoperability, and reliability across distributed environments.</li><li>Implement smart contract frameworks using Rust, Go, or Solidity with a strong emphasis on performance and security.</li><li>Design cross-chain communication protocols and bridges to enhance ecosystem connectivity.</li><li>Conduct architecture reviews, audits, and performance benchmarking to ensure platform robustness.</li><li>Collaborate with engineering, AI, and product teams to align technical architecture with long-term vision and roadmap.</li><li>Stay ahead of blockchain and AI convergence trends, recommending new technologies and frameworks for future adoption.</li></ul>Requirements<ul><li>10+ years of experience in blockchain systems design, distributed computing, or protocol-level engineering.</li><li>Strong proficiency in Rust, Go, and Solidity, with deep knowledge of blockchain internals and virtual machine design.</li><li>Hands-on experience with multiple blockchain platforms (e.g., Solana, Ethereum, Polygon, Hyperledger, or other L1/L2s).</li><li>Proven background in building or architecting scalable decentralized systems.</li><li>Strong understanding of cryptographic principles, consensus algorithms, and network security.</li><li>Experience designing systems focused on high throughput, low latency, and fault tolerance.</li><li>Demonstrated leadership in technical architecture, system scalability, and team mentorship.</li><li>Familiarity with AI or ML-driven optimization in distributed networks is a strong advantage.</li></ul>Why Join Us?<ul><li>Attractive, industry-standard compensation.</li><li>Equity options to share in the company&rsquo;s growth.</li><li>Opportunity to architect blockchain infrastructure that shapes future digital ecosystems.</li><li>Collaborative, remote-friendly environment focused on innovation and deep technology development.</li></ul>Job Type: Full-timePay: Up to AED360,000.00 per year

Blockchain Architect (10+ Years Experience)

Infinty Blockchain Solutions

We are looking for a passionate and motivated Blockchain Developer to join our growing team. As a junior developer, you will work closely with senior engineers and contribute to the design, development, and deployment of blockchain-based solutions. This is an excellent opportunity for recent graduates or developers new to blockchain to gain hands-on experience in a fast-paced, innovative environmentResponsibilities:-Design, develop, and deploy secure and efficient smart contracts using Solidity.-Integrate smart contracts with backend systems using Ethers.js or Web3.js.-Build and maintain scalable REST APIs using Node.js and Express.js.-Develop and manage MongoDB or other NoSQL/SQL databases.-Collaborate with frontend developers and designers to integrate blockchain functionality into web applications.Required Skills and Qualifications:Bachelor degree in computer science or similarProficient in Solidity and Ethers.jsHaving actual mainnet/testnet smart contract deploymentsStrong backend development skills using Node.js and Express.js.Experience working with MongoDB or similar databases.The job is onsite, and all interviews and tests will be held onsite aswell.Timings: 4:00PM - 12:30AMSalary : 30k - 40kLocation: Bahria Phase 7, RawalpindiJob Type: Full-timePay: Rs30,000.00 - Rs40,000.00 per monthWork Location: In person

Blockchain developer

BI Consultancy Services

Junior Blockchain developerWe are looking for a passionate and motivated Blockchain Developer to join our growing team. As a junior developer, you will work closely with senior engineers and contribute to the design, development, and deployment of blockchain-based solutions. This is an excellent opportunity for recent graduates or developers new to blockchain to gain hands-on experience in a fast-paced, innovative environmentResponsibilities:-Design, develop, and deploy secure and efficient smart contracts using Solidity.-Integrate smart contracts with backend systems using Ethers.js or Web3.js.-Build and maintain scalable REST APIs using Node.js and Express.js.-Develop and manage MongoDB or other NoSQL/SQL databases.-Collaborate with frontend developers and designers to integrate blockchain functionality into web applications.Required Skills and Qualifications:Bachelor degree in computer science or similarProficient in Solidity and Ethers.jsHaving actual mainnet/testnet smart contract deploymentsStrong backend development skills using Node.js and Express.js.Experience working with MongoDB or similar databases.The job is onsite, and all interviews and tests will be held onsite aswell.Salary: 30-40KTimings : 4:00PM - 12:30AMOffice location: Bahria Town phase 7, RawalpindiJob Type: Full-timePay: Rs30,000.00 - Rs40,000.00 per monthWork Location: In person

Junior Blockchain developer

Artemis

<div>
 
 About Artemis
 
 
 
 Traditional finance and crypto-enabled finance are merging into digital finance &mdash; an open, global financial system for everyone. Stripe launched its own blockchain, JPM is getting involved with stablecoins, Robinhood launched tokenized stocks and its own blockchain.
 
 
 Finance is moving onchain
 
 and it&rsquo;s accelerating.
 
 
 
 Previously platforms like Bloomberg, CapIQ, and FactSet became the information layer on top of finance, growing into $1&ndash;$10B ARR businesses. But these platforms weren&rsquo;t built for a crypto-native world.
 
 
 Artemis is building the open data platform for digital finance &mdash; organizing and standardizing the metrics that matter for blockchains, tokens and stablecoins, all in one place.
 
 
 Functionally, we offer a &ldquo;Bloomberg-like&rdquo; Terminal trusted by Visa, Circle, Tether, Grayscale, VanEck, Franklin Templeton, Solana, Base, and others &mdash; alongside Excel plugins, APIs, and Snowflake Data Shares LOVED by some of the world&rsquo;s largest asset managers.
 
 
 Our mission is to make crypto&rsquo;s promise of an open financial system real and to empower anyone, anywhere, to become a world-class investor in digital finance.
 
 
 
 Who We Are
 
 
 
 
 "Humans wanted for hazardous journey. Small wages, bitter cold, long months of complete darkness, constant danger. Safe return doubtful. Honor and recognition in case of success&rdquo;
 
 &mdash; Ernest Shackleton, Antarctic Explorer
 
 
 At Artemis we&rsquo;re doing really challenging things, very much inspired by Ernest Shackleton&rsquo;s mindset. Hard things are not for everyone, only the select few who have superhuman-levels of mental fortitude, optimism, compassion, and courage.
 
 
 If this is who you are &mdash; let&rsquo;s talk!
 
 
 We&rsquo;re a passionate group of TradFi ex-analysts, crypto-natives, and folks set on building the future of finance. We come from Meta, Coinbase, Blackrock, Messari, Ribbit Capital, EY Blockchain, and Insight Partners. We raised from the best venture capitalists in the world and would love to tell you more.
 
 
 We index highly on passion, motivation, and a mindset like Ernest Shackleton&rsquo;s. No formal experience engineering specifically in crypto, traditional finance, fintech, or investment banking is required.
 
 
 What you'll do:
 
 
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 Help Artemis grow: We are at an inflection point where we have paying customers, a strong pipeline of prospects, and are scaling. You will have a defining role to build APIs that will support our expanding product lines, dashboards, and 0 &rarr; 1 products.
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 Own and build High Performance APIs: We&rsquo;re at 50k MAUs, now scaling to 200k+. We are constantly growing to new customer bases and onboarding institutional clients which requires us to have robust and performant APIs. As a backend engineer at Artemis we expect you to be able to build scalable and performant APIs that are the backbone of multiple Artemis Products used by everyone from liquid token funds to large hedge funds.
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 Push the limits of crypto data products: Our mission is to redefine how people use and understand crypto data by creating what we call N of 1 products (like onchain AI data analysts!) We start by powering the most sophisticated investors in the space and then opening that product to the 100s of thousands of users that use our site for free.
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 Help us move more onchain: We have many exciting projects to help bridge our terminal product and data sets to more on chain native primitives. As an engineer at Artemis, you&rsquo;ll work the team to integrate with leading onchain platforms.
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 Talk to customers: We have a core value #customerobsession and you'll interact with our customers directly by supporting them and collecting feedback to inform what product we build. Work closely with our partners at crypto protocols and foundations to build products that will be deeply embedded into their workflows.
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 Build the team: you'll play a big role in creating the culture and workplace that you want to work at.
 
 
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 Who You Are
 
 
 
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 You&rsquo;re a passionate backend engineer
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 You want to build n of 1 products i.e., products that have never been built before and redefine how this space operates.
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 You take ownership and pride in your work, balancing autonomy with collaboration
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 You thrive in fast-paced, high-context environments, where you can exercise judgment and move ideas from concept to production quickly
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 You&rsquo;re a self-starter who values reliability, clarity, and impact over hierarchy
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 You want to work in-person (hybrid) with a high-performing, low-ego team in NYC
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 Prior experience working with onchain data and onchain development is a plus
 
 
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 Our stack:
 
 
 
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 Backend: FastAPI Python Backend, DuckDB, and Postgres
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 (Frontend: React Native + NextJS Frontend)
 
 
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 </ul>
 Compensation Range: $150K - $250K
 
 
</div>

Software Engineer - Backend

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