Top Blockchain Jobs in Los Angeles, CA

Lead technically complex card-acquiring payment projects from design through production. Build and operate highly reliable payment systems, integrations, testing and certification tooling, and shared engineering frameworks. Analyze ISO messages, network mandates, routing, authorization, clearing, settlement, and processing costs. Provide technical direction, mentor engineers, participate in on-call operations, and establish safe AI-assisted engineering practices for critical financial systems.

Operate and mature Block’s global business resilience program across business continuity, disaster recovery, crisis management, operational resilience, third-party resilience, testing, reporting, and regulatory support. Identify risks, maintain recovery plans, coordinate exercises, track remediation, assess third parties, communicate resilience posture to leadership and Boards, and improve workflows through AI, automation, dashboards, templates, and self-service tools.

Lead product data engineering across architecture, data modeling, pipelines, monitoring, lineage, and data quality. Build reliable analytical datasets, support experimentation and machine learning use cases, and resolve business-critical pipeline issues. Partner with product and engineering stakeholders to translate business needs into automated data solutions. The role requires ownership of end-to-end data engineering projects, on-call participation, and development of AI-assisted monitoring and automation.

Own end-to-end revenue and partnership accounting, including month- and quarter-end close, reconciliations, journal entries, subledger reviews, variance analysis, revenue recognition, incentive accounting, disclosures, controls, and audit support. Apply ASC 606 and US GAAP to complex arrangements while partnering with commercial, legal, tax, and data teams. Design AI and automation solutions using ChatGPT and Gemini to improve efficiency, quality, governance, and auditability.

Lead product data engineering initiatives by designing data models, owning critical pipelines, building data quality and lineage monitoring, and supporting experimentation and ML-ready datasets. Translate business needs into automated data solutions, maintain pipeline SLAs through on-call support, and develop AI-assisted tools for issue detection and resolution. Collaborate with Product, Engineering, Data Science, Machine Learning, and Applied AI teams across Block’s products.

Own application security for backend services, APIs, cloud infrastructure, and edge systems handling financial transactions. Responsibilities include validating red-team findings, assigning severity, hardening services, implementing WAF and rate-limiting defenses, creating automated security configuration checks, expanding pull-request security gates, reviewing architectures, managing attack-surface coverage, and evaluating security tools. The role also partners with engineers and Security Operations to drive effective remediation.

Conduct application security assessments, discover and validate vulnerabilities, analyze complex codebases, build custom security tooling, perform threat modeling and architecture reviews, and deliver actionable findings to clients. Independently own assessment workstreams, develop proof-of-concept exploits, communicate technical conclusions, review team work, and contribute to security research, open-source tools, and technical writing.

Build and operate foundational developer infrastructure across CI, build systems, deployment orchestration, and test platforms. Improve build speed, deployment safety, test reliability, observability, and engineering productivity at scale. Own services from architecture through production, including SLOs and on-call operations. Lead cross-functional technical projects, partner with engineering teams, mentor engineers, and shape platform strategy.

Provide tax preparation, planning, and advisory services for individuals and businesses holding bitcoin and digital assets. Prepare and file tax returns, calculate cost basis and gains/losses, advise on mining/staking/airdrop income, collaborate with advisors and estate planners, maintain compliance documentation, and contribute thought leadership through articles and webinars.

Assistant General Counsel will own commercial contracting, negotiate client and partner agreements, advise Product and Engineering on legal and regulatory issues, and support corporate, governance, employment, IP, privacy, compliance, financing, and disputes matters. Reporting to the General Counsel, this role will serve as second-in-command while building legal templates, playbooks, intake processes, contract management systems, and automation for a growing onchain financial business.

Lead the BSA/AML and Sanctions compliance program for a regulated fintech payments business. Responsibilities include maintaining policies, risk assessments, controls, and governance; translating regulations into product and control requirements; conducting counterparty due diligence; delivering training; supporting audits and regulatory examinations; and advising Product, Engineering, Legal, Sales, and other teams on compliance risks. The role requires deep payments, digital assets, blockchain, sanctions, AML, and fintech compliance expertise.

Supports fulfillment and logistics operations, including inventory, warehouse, and fulfillment activities. Performs standardized administrative and operational tasks under supervision, applies defined procedures, exercises limited independent judgment, and escalates non-routine issues. The role requires job-related training, on-the-job experience, and the ability to support warehouse and operational execution within established guidelines.