blockchain engineer

Craftner INC

<div><h6 class="jobSectionHeader">Charlotte, NC | Contract To Hire</h6>
<h4 class="jobSectionHeader">Preferred Skills</h4>
Blockchain 
 
 
 
 
<h4 class="jobSectionHeader">Job Description</h4>
Duties and Responsibilities:
<ul>
<li>Design, develop and implement blockchain capabilities</li>
<li>Design new methods for implementing blockchain technology for our clients</li>
<li>Incorporate usage of digital tokens and smart contract</li>
<li>Execute research and development activities for new blockchain deliverables</li>
</ul>
Requirements:
<ul>
<li>Bachelor&rsquo;s in Computer Science, Information Technology or similar field</li>
<li>Minimum of 4 years of experience designing, implementing and supporting software solutions</li>
<li>Front-end: JavaScript, HTML/CSS, Angular / React</li>
<li>Back-end:, Golang, Java, Python</li>
<li>Database: Oracle,MongoDB, MySQL, etc&hellip;</li>
<li>Infrastructure: Docker, Kubernetes, Continuous Integration, etc&hellip;</li>
<li>Cloud Platform: AWS, Azure, GCP</li>
<li>RESTful APIs, Object-Oriented</li>
<li>Experienced using cryptography and hashing algorithms</li>
<li>Possesses a thorough understanding of the differences between a Private and Public Blockchain</li>
<li>Experienced in working with Tokens / Digital Certificates / Smart Contracts</li>
<li>Experienced in developing Blockchain applications on Hyperledger, Ethereum, Corda, Ripple or other proprietary language and APIs</li>
<li>Strong understanding of blockchain capabilities in logistics, networking, authentication, validation and cryptocurrency</li>
<li>Work well in a Scrum team environment full of innovators</li>
<li>Open minded with a success driven attitude
</li><li>Has a passion for innovation</li>
</ul>
Desired Skills:
<ul>
<li>Blockchain developer certification</li>
<li>Prior blockchain development and implementation experience</li></ul> 
 
 
<h5 class="jobSectionHeader">For immediate consideration, please forward your Word resume to sheetal@craftner.com</h5></div>

Blockchain Software Engineer

Bunachain Blockchain

Responsibilities Design blockchain architecture, including smart contracts and consensus mechanisms. Develop and deploy decentralized apps with languages like Solidity or Python on platforms such as Ethereum. Implement security using cryptography and test for vulnerabilities. Collaborate with teams to integrate blockchain into existing systems and optimize performance.Qualifications Bachelor's in computer science or related field, plus 2+ years of blockchain experience. Proficiency in programming languages like Solidity, Python, JavaScript, or C++. Strong knowledge of cryptography, data structures, and blockchain protocols. Experience with Ethereum, Hyperledger, or similar platforms; problem-solving and adaptability.Pay: QAR120.00 - QAR600.00 per hourWork Location: In person

Blockchain Developer

mLabs

<div>Senior Backend Engineer
Location: EMEA / EU Hours - Authorised to work in EMEA
Remote | Full-time
Compensation: &euro;90K - &euro;130K
Our client is a high-growth fintech leader specializing in simplifying multi-chain DeFi for traditional financial institutions, fintechs, and service providers. By offering a unified API, the platform provides seamless access to on-chain liquidity across all major blockchains for optimized same-chain and cross-chain swaps. The organization is on a mission to enable a fairer, decentralized world while prioritizing exceptional user experiences to make complex technologies accessible to a global audience.
The organization is seeking multiple Senior Backend Engineers to lead the design, development, and maintenance of robust, scalable, and secure backend systems. Reporting to the Backend Lead, the successful candidates will collaborate with cross-functional teams&mdash; including frontend developers, product managers, and designers&mdash;to deliver high-quality software solutions. The technical environment utilizes a modern stack including Node.js (TypeScript), MongoDB, Redis, and ethers.js, supported by a GitOps CD chain involving Kubernetes and AWS.
Key Responsibilities<ul><li>
System Leadership: Lead and participate in the design, development, and maintenance of backend systems and APIs.</li><li>
Scalable Architecture: Architect and implement robust backend solutions capable of handling increasing user loads and evolving business requirements.</li><li>
Quality Standards: Maintain high coding standards, conduct thorough code reviews, and ensure best practices for maintainability and readability.</li><li>
Performance Optimization: Identify system bottlenecks and optimize code and algorithms to improve overall performance.</li><li>
Proactive Monitoring: Implement monitoring and debugging tools to identify and resolve issues proactively, ensuring high system availability.</li><li>
Testing &amp; Reliability: Develop comprehensive test suites&mdash;including unit, integration, and end-to-end tests&mdash;to ensure backend reliability.</li><li>
Mentorship: Provide guidance to junior developers to foster technical growth within the team.</li><li>
Documentation: Document code, APIs, and technical processes to facilitate knowledge sharing and streamline onboarding.</li></ul>
Interview Process<ul><li>
Initial Screening: Recruiter / HR Call</li><li>
Hiring Manager Interview: Discussion with the Backend Lead</li><li>
Technical Assessment: Take-Home Test</li><li>
Technical Deep-Dive: Technical Interview</li><li>
Cultural Alignment: Group Interview</li></ul> 

Requirements 
<ul><li>
Location: Candidates must be located in the EMEA or APAC regions.</li><li>
Technical Expertise: Strong professional experience with TypeScript and Node.js is required.</li><li>
Stellar Experience: Proven experience working with the Stellar network in production environments.</li><li>
Blockchain Background: Previous experience in the blockchain space with a technical understanding of the EVM ecosystem (or other blockchain environments). Familiarity with Stellar&rsquo;s Soroban smart contracts is a significant plus.</li><li>
Seniority: Extensive professional experience in a similar role at a senior or lead level.</li><li>
Infrastructural Knowledge: Solid understanding of document databases (MongoDB), caching mechanisms (Redis), and system architecture design.</li><li>
Soft Skills: Excellent analytical, problem-solving, and communication skills. Ability to work both autonomously and collaboratively in a proactive manner.</li><li>
Education: A Bachelor&rsquo;s or Master&rsquo;s degree in Computer Science is considered a plus.</li><li>
Language: Very strong written and verbal English skills for effective stakeholder communication.</li></ul>
Our Client's Culture
Our client operates on a foundation of mutual respect, high accountability, and continuous growth. They are looking for teammates who resonate with the following core values:<ul><li>
Embracing Differences: Our client values unique qualities and views individual differences as an opportunity for the entire team to grow.</li><li>
Ownership and Execution: Every team member is expected to own their tasks end-to-end, holding themselves to a high bar for execution and accountability.</li><li>
Failing Forward: Innovation requires courage. The team is encouraged to try new things, learn from mistakes without repeating them, and adapt quickly.</li><li>
Collaborative Fun: Beyond the tech, the team prioritizes getting to know one another, maintaining a light-hearted environment rooted in love and respect.</li></ul> 

Benefits 
Our client offers a comprehensive package designed to support a high-performing, remote-first team:<ul><li>
Compensation: Competitive salary range of &euro;90,000 &ndash; &euro;130,000 EUR, plus equity participation from day one.</li><li>
Time Off: 30 days of Paid Time Off (PTO).</li><li>
Flexibility: Flexible remote work days and flexible working hours.</li><li>
Offsites: Annual team offsites (previous locations include Thailand, Vietnam, and Marrakech).</li><li>
Equipment: Choice of work computer and hardware.</li><li>
Allowances: * An annual &euro;1,000 personal development budget (after 6 months of tenure).</li><li>
A one-time &euro;1,000 remote work budget for office setup or coworking expenses.</li></ul>
Note: Candidates joining as independent contractors are entitled to the first five benefits listed above.
Due to the high volume of applications we anticipate, we regret that we are unable to provide individual feedback to all candidates. If you do not hear back from us within 4 weeks of your application, please assume that you have not been successful on this occasion. We genuinely appreciate your interest and wish you the best in your job search.
Commitment to Equality and Accessibility:
At MLabs, we are committed to offer equal opportunities to all candidates. We ensure no discrimination, accessible job adverts, and providing information in accessible formats. Our goal is to foster a diverse, inclusive workplace with equal opportunities for all. If you need any reasonable adjustments during any part of the hiring process or you would like to see the job-advert in an accessible format please let us know at the earliest opportunity by emailing human-resources@mlabs.city.
MLabs Ltd collects and processes the personal information you provide such as your contact details, work history, resume, and other relevant data for recruitment purposes only. This information is managed securely in accordance with MLabs Ltd&rsquo;s Privacy Policy and Information Security Policy, and in compliance with applicable data protection laws. Your data may be shared only with clients and trusted partners where necessary for recruitment purposes. You may request the deletion of your data or withdraw your consent at any time by contacting legal@mlabs.city.</div>

Senior Backend Engineer - Stellar Ecosystem

SoFi

<div><div>Employee Applicant Privacy Notice

Who we are:
<div>
Shape a brighter financial future with us.

Together with our members, we're changing the way people think about and interact with personal finance.

We're a next-generation financial services company and national bank using innovative, mobile-first technology to help our millions of members reach their goals. The industry is going through an unprecedented transformation, and we're at the forefront. We're proud to come to work every day knowing that what we do has a direct impact on people's lives, with our core values guiding us every step of the way. Join us to invest in yourself, your career, and the financial world.
</div></div>
The Role

We're excited to invite a Senior Staff Engineer to join our amazing team at SoFi! We are on a journey to build out a new team dedicated to developing innovative crypto products and services for our members. With recent developments paving the way for SoFi to re-enter the crypto space, we're eager to expand our product offerings with intuitive, secure, and fully-featured solutions across crypto Investing, Transfers, Payments, Custody, and beyond.

As a member of our team, you'll be right in the heart of the action&mdash;implementing functionality, architecting our systems, squashing bugs, maintaining the health of our code, and continuously growing as an engineer. We're looking for someone who is both forward-thinking and hands-on, with a strong sense of ownership and a passion for delivering results. You'll also be a great mentor and co-worker! At SoFi, we take pride in the collaboration between Product, Design, and Engineering, and you'll be involved in the entire product lifecycle&mdash;from ideation through building, deploying, and ongoing improvement and evolution.

Joining SoFi means becoming part of a new kind of finance company with a mission to help our members achieve financial independence and reach their goals. We aim to be at the center of our members' financial lives, helping everyone get their money right. We started with student loan refinancing, tackling the biggest financial challenge of a new generation through a modern approach to lending and personal finance. Since then, we've expanded our products and services across loans, wealth management, and insurance. SoFi has seen significant growth and has ambitious plans ahead, but to continue this journey, we need talented individuals like you!

Key responsibilities:
<ul>
<li>Write production-grade, scalable backend code using Java, Kotlin, Spring Boot, and modern frameworks.</li>
<li>Debug and resolve complex systems issues in high-scale, real-time services.</li>
<li>Build high-quality, scalable systems with a focus on performance, security, and reliability in crypto products.</li>
<li>Shape the technical architecture across SoFi's crypto stack&mdash;wallets, custody, trading, and beyond.</li>
<li>Drive new ideas and technical strategies that push our crypto offerings forward.</li>
<li>Raise the bar on engineering through code quality, mentorship, and setting strong technical standards.</li>
<li>Apply deep knowledge of crypto protocols, smart contracts, and blockchain infrastructure.</li>
<li>Collaborate across teams to deliver reusable crypto services and integrate with SoFi's broader platform.</li>
<li>Mentor engineers and contribute to a culture of technical growth and curiosity.</li>
<li>Lead discussions, reviews, and decisions across teams and with senior technical leadership.</li>
<li>Make smart, pragmatic decisions that balance speed and quality.</li>
<li>Stay curious&mdash;constantly learning new tools, protocols, and patterns in the evolving crypto space.</li>
<li>Ask hard questions, give and take feedback well, and thrive in a collaborative, fast-moving environment.</li>
</ul>
What you'll need:
<ul>
<li>10+ years of programming experience, with significant experience in modern languages and familiarity with AI tools.</li>
<li>BS Degree or equivalent from a fully-accredited college or university preferred.</li>
<li>Expert understanding and hands-on experience building and operating large-scale fault-tolerant distributed systems, workflows, databases, and mobile/web applications.</li>
<li>Expertise with Java / Spring / Kotlin / PostgreSQL / AWS, and any modern Java frameworks, REST APIs, and relational databases.</li>
<li>Deep understanding of code release, deployment orchestration/rollout mechanisms, logging, instrumentation, monitoring, and alerting in a microservices environment.</li>
<li>Experience with public cloud infrastructure.</li>
<li>Excellent verbal and written communication skills and ability to work with stakeholders across disciplines.</li>
<li>Understanding of blockchain fundamentals and distributed ledger technologies.</li>
<li>Familiarity with digital assets across major chains (Bitcoin, Ethereum, etc.).</li>
<li>Hands-on experience with smart contracts is a plus.</li>
<li>Familiarity with custody, settlement, and clearing of crypto transactions.</li>
<li>Experience with security and best practices for wallet management.</li>
<li>Exposure to crypto trading platforms, market data, and DeFi protocols.</li>
<li>Experience integrating with or building services using crypto infrastructure providers (e.g., Fireblocks, Zero Hash, Anchorage).</li>
<li>Awareness of Web3 trends, including NFTs, DAOs, and Layer 2 solutions.</li>
<li>Prior work in or collaboration with crypto-native companies or fintechs.</li>
<li>Enthusiasm for the evolving digital asset ecosystem and its potential impact on financial services.</li></ul><div><div> 
Compensation and Benefits</div>
<div>The base pay range for this role is listed below. Final base pay offer will be determined based on individual factors such as the candidate's experience, skills, and location.</div>
<div></div>
<div>To view all of our comprehensive and competitive benefits, visit our Benefits at SoFi page!</div>
<h5 class="jobSectionHeader">SoFi provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion (including religious dress and grooming practices), sex (including pregnancy, childbirth and related medical conditions, breastfeeding, and conditions related to breastfeeding), gender, gender identity, gender expression, national origin, ancestry, age (40 or over), physical or medical disability, medical condition, marital status, registered domestic partner status, sexual orientation, genetic information, military and/or veteran status, or any other basis prohibited by applicable state or federal law.</h5>
<h5 class="jobSectionHeader">The Company hires the best qualified candidate for the job, without regard to protected characteristics.</h5>
<h5 class="jobSectionHeader">Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.</h5>
<h5 class="jobSectionHeader">New York applicants: Notice of Employee Rights</h5>
<h5 class="jobSectionHeader">SoFi is committed to an inclusive culture. As part of this commitment, SoFi offers reasonable accommodations to candidates with physical or mental disabilities. If you need accommodations to participate in the job application or interview process, please let your recruiter know or email accommodations@sofi.com.</h5>
<h5 class="jobSectionHeader">Due to insurance coverage issues, we are unable to accommodate remote work from Hawaii or Alaska at this time.</h5>
<div>Internal Employees</div>
<div>If you are a current employee, do not apply here - please navigate to our Internal Job Board in Greenhouse to apply to our open roles.</div></div></div>

Senior Staff Software Engineer, Crypto

Sakura Premiums LLC

Job Opportunity: Blockchain Strategy LeadLocation: Doha, Qatar Company: Sakura Premiums LLCAbout UsSakura Premiums LLC is a forward-thinking company specializing in premium digital solutions and innovative technologies. With a strong focus on blockchain and decentralized systems, we are committed to reshaping industries through secure, transparent, and scalable platforms. As part of our expansion in Doha, we are seeking a visionary Blockchain Strategy Lead to spearhead our blockchain initiatives and drive strategic adoption.Role OverviewThe Blockchain Strategy Lead will be responsible for defining and executing the company&rsquo;s blockchain roadmap, overseeing research and development, and aligning blockchain solutions with business objectives. This leadership role requires deep technical expertise, strategic foresight, and the ability to collaborate across teams and industries.Key Responsibilities<ul><li>Develop and implement blockchain strategies to support business growth.</li><li>Lead research and development of blockchain-based products and services.</li><li>Collaborate with product, engineering, and operations teams to integrate blockchain solutions.</li><li>Evaluate emerging blockchain technologies and recommend adoption strategies.</li><li>Ensure compliance with security, regulatory, and governance standards.</li><li>Build partnerships with industry stakeholders, vendors, and regulators.</li><li>Mentor and lead a team of blockchain developers and analysts.</li><li>Report regularly to senior leadership on blockchain initiatives and outcomes.</li></ul>Qualifications<ul><li>Bachelor&rsquo;s or Master&rsquo;s degree in Computer Science, Information Technology, or related field (PhD preferred).</li><li>8&ndash;10 years of experience in blockchain, fintech, or digital transformation, with at least 3 years in a leadership role.</li><li>Proven expertise in blockchain frameworks (Ethereum, Hyperledger, Solana, etc.).</li><li>Strong knowledge of smart contracts, decentralized applications (dApps), and tokenization.</li><li>Experience with cloud platforms, cybersecurity, and data governance.</li><li>Excellent leadership, analytical, and communication skills.</li><li>Ability to manage multiple priorities in a fast-paced environment.</li><li>Fluency in English; Arabic is a strong advantage.</li></ul>Why Join Us?<ul><li>Be part of a pioneering company driving blockchain innovation in Doha.</li><li>Play a key role in shaping Sakura Premiums LLC&rsquo;s blockchain strategy.</li><li>Competitive executive compensation and benefits package.</li><li>Opportunities for professional development and international exposure.</li><li>Collaborative, innovative, and technology-driven work culture.</li></ul>Job Type: Full-timePay: Up to QAR40,500.00 per monthWork Location: In person

Blockchain Strategy Lead

QuickNode

<div>Quicknode is a cloud-based infrastructure company that powers the blockchain ecosystem.
Our mission is to be the indispensable utility that empowers companies and innovators globally to build next-generation, Web3 enabled businesses &amp; applications using blockchain technology. Quicknode is backed by some of the world's best investors including Tiger Global, Y Combinator, SoftBank, and the Seven Seven Six Fund. The Quicknode team has over 120 people maintaining high performance global data infrastructure for amazing customers serving billions of requests daily.
We are a global remote company with an HQ in Miami, Florida.<h1 class="jobSectionHeader">
Job Description</h1>
The Role
As a Senior Go Engineer on the RPC Platform team at Quicknode, you will design, build, and scale the critical infrastructure that powers high-performance blockchain RPC services used by developers and enterprises globally. This role operates at the intersection of distributed systems, Web3 infrastructure, and developer experience, requiring deep technical ownership and a strong bias toward execution.
What You&rsquo;ll Do<ul><li>
Design, build, and optimize high-throughput, low-latency backend services in Go.</li><li>
Architect distributed systems.</li><li>
Own end-to-end delivery from design through production.</li><li>
Improve uptime and reduce latency across services.</li><li>
Collaborate with Product, Infrastructure, and DevEx teams.</li><li>
Debug and resolve complex production issues.</li><li>
Drive engineering standards and best practices.</li></ul>
What You&rsquo;ll Bring<ul><li>
6&ndash;10 years of experience building and operating backend or distributed systems in high-scale production environments, aligning with P4 expectations.</li><li>
Strong proficiency in Go, with a demonstrated ability to quickly adopt new languages and frameworks as needed.</li><li>
Deep experience designing and operating distributed systems, databases, and streaming architectures.</li><li>
Proven track record of delivering scalable, reliable systems with measurable impact on performance, availability, and developer experience.</li><li>
Experience working with Web3, blockchain infrastructure, or high-throughput API platforms, including familiarity with RPC services, node infrastructure, or data streaming pipelines.</li><li>
Strong problem-solving skills with the ability to debug complex, cross-system issues in production environments.</li><li>
Demonstrated ability to operate autonomously, prioritize effectively, and deliver outcomes in fast-paced, ambiguous environments.</li><li>
Excellent communication skills with experience collaborating across engineering, product, and customer-facing teams.</li></ul>
The Quicknode compensation philosophy includes pillars to ensure fair and unbiased compensation for all employees. To design and deliver total reward offerings that are employee-centric. To offer a competitive benefit package in all locations where we operate. To prioritize attracting and retaining the best talent globally. To maintain a high-performing and flexible way of working.
During the hiring process, we are committed to discussing compensation openly and honestly. We encourage candidates to share their salary expectations and requirements early, allowing for an individualized discussion. We know that our total rewards practices impact the lives and wellbeing of our employees. Therefore, we will never stop learning about the market, our business, your needs, and how best to achieve our goals through thoughtful and data-driven practices. If you have any questions or require further information about the compensation for this position, please don't hesitate to reach out to your Recruiter.
We at Quicknode are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.</div>

Senior Software Engineer

Peptidescore

About Us PeptideScore.com is an emerging platform at the intersection of data analytics, modern web technologies, and blockchain. Our mission is to build a scalable and innovative product that leverages decentralized technologies to deliver real-world value. <h3>Open Roles</h3> <h4>1. Full-Stack MERN Developer</h4>Responsibilities<ul><li>Design, build, and maintain scalable web applications using MongoDB, Express.js, React, and Node.js</li><li>Develop and integrate RESTful APIs and third-party services</li><li>Ensure application performance, security, and responsiveness</li><li>Collaborate with cross-functional teams including designers and blockchain developers</li></ul>Requirements<ul><li>Proven experience with the MERN stack</li><li>Strong understanding of API development and authentication (JWT/OAuth)</li><li>Experience with cloud platforms (AWS, GCP, or similar)</li><li>Familiarity with Git and modern development workflows</li></ul> <h4>2. Blockchain Developer (Web3 / Smart Contracts)</h4>Responsibilities<ul><li>Develop and integrate blockchain-based features into the platform</li><li>Write and deploy smart contracts</li><li>Collaborate closely with frontend and backend teams</li></ul>Requirements<ul><li>Experience with Solidity and Ethereum or EVM-compatible blockchains</li><li>Knowledge of cryptocurrency/payment integrations</li><li>Understanding of blockchain security best practices</li></ul>

MERN Developer & Blockchain Developer (Web3)

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