Freelance Blockchain Devops Jobs (NOW HIRING)

REQUIREMENT

• Architect and design scalable, resilient, and secure blockchain-based solutions for Citi's Digital Asset Platform, ensuring alignment with enterprise architecture standards and regulatory requirements
• Lead end-to-end technical delivery of complex blockchain and digital asset features, owning architecture decisions from inception through production deployment
• Define and enforce engineering best practices, coding standards, and design patterns across the team for both enterprise and web3 application development
• Drive technical strategy for the platform, evaluating and recommending emerging blockchain protocols, frameworks, and tooling relevant to Citi's digital asset roadmap
• Collaborate with senior stakeholders including product owners, business leads, risk, compliance, and infrastructure teams to translate business requirements into robust technical solutions
• Mentor and guide junior and mid-level engineers, conducting code reviews, providing technical direction, and fostering a culture of engineering excellence
• Lead the evaluation and integration of third-party blockchain networks, smart contract platforms, tokenization frameworks, and digital asset custody solutions
• Ensure platform reliability, scalability, and performance through proactive design, observability, and operational best practices
• Contribute to and own technical documentation, architecture decision records (ADRs), and platform runbooks
• Represent the engineering team in cross-functional forums, architecture review boards, and senior leadership discussions
• Identify, manage, and escalate technical risks and blockers to ensure on-time, on-budget, and high-quality delivery

• Bachelor's degree in Computer Science, Engineering, or a related discipline; MS or PhD is strongly preferred
• 10+ years of progressive experience in software engineering, with a strong focus on backend and distributed systems development
• 7+ years of hands-on experience with Java/Spring backend development in enterprise-grade production environments
• 3+ years of experience in blockchain and web3 application development, including smart contract integration, tokenization, or digital asset infrastructure
• Demonstrated experience architecting large-scale, high-availability distributed systems in a financial services or similarly regulated environment
• Deep expertise in microservices architecture, API design, event-driven systems, and asynchronous programming patterns
• Proven experience with smart contract platforms (e.g., Ethereum, Hyperledger, Corda, or equivalent) and associated tooling
• Strong familiarity with web3 libraries (Web3J, Web3JS, Ethers.js) and blockchain SDKs
• Experience with Solidity or other smart contract languages; ability to review and audit smart contract code
• Solid understanding of cryptographic primitives, digital signatures, key management, and wallet infrastructure
• Experience with DevOps practices, CI/CD pipelines, containerization (Docker/Kubernetes/Helm), and cloud-native deployments
• Familiarity with financial industry regulations and compliance considerations relevant to digital assets (e.g., tokenized securities, CBDCs, stablecoins) is a strong plus
• Experience working in Agile/Scrum environments with distributed global teams

• Technical Leadership: Proven ability to lead architectural decisions and drive engineering strategy in a senior individual contributor or lead capacity
• Deep Engineering Expertise: Mastery of software engineering fundamentals data structures, algorithms, design patterns, system design with the ability to translate them into elegant, production-ready solutions
• Blockchain Fluency: Comprehensive understanding of blockchain protocols, consensus mechanisms, tokenization standards (ERC-20, ERC-721, etc.), and DeFi/TradFi integration patterns
• Communication & Influence: Exceptional ability to communicate complex technical concepts clearly to both technical and non-technical audiences, including executive stakeholders
• Problem Solving: Strong analytical mindset with a track record of solving ambiguous, high-complexity engineering challenges in regulated environments
• Mentorship: Demonstrated ability to coach, mentor, and elevate the capabilities of engineering teams
• Delivery Focus: Proven track record of delivering high-quality, mission-critical software on time and at scale
• Tooling Proficiency: Expert-level command of engineering toolsets including Git, Jira, Jenkins, Helm Charts, Kubernetes, and observability platforms
• Innovation Mindset: Ability to identify disruptive opportunities and translate them into actionable engineering initiatives with measurable commercial impact

• Play a defining role in shaping the architecture and future direction of one of Citi's most strategically important technology platforms
• Gain broad exposure to Citi's global technology, business, and risk functions, building a strong internal network across the firm
• Work alongside world-class engineers and business leaders who are pioneering the future of institutional digital finance
• Have direct access to Citi's executive management team and senior technology leadership, with significant visibility across the organization
• Be at the cutting edge of blockchain, tokenization, and digital asset innovation within a globally systemically important financial institution
• Benefit from Citi's investment in continuous learning, with access to emerging technologies, industry conferences, and cross-functional innovation programs