Intelligence Screening and Monitoring Blockchain Analyst at ClearBank. Responsible for investigating transaction monitoring alerts and ensuring compliance with AML regulations.
SF
Hybrid Principal Blockchain Platform Engineer – Digital Assets
Posted 6 hours ago
About the role
- Principal Blockchain Platform Engineer designing and operating blockchain infrastructure on AWS and Kubernetes at Fidelity. Managing node operations for Bitcoin, Litecoin, and Ethereum with a focus on performance and security.
Responsibilities
- Architect and maintain containerized blockchain nodes on AWS/EKS using Terraform, Helm, and CI/CD pipelines
- Operate Bitcoin/Litecoin full/archive nodes (UTXO set, mempool, pruning, peer policies) with high‑availability RPC and optimized disk I/O
- Operate Ethereum execution clients (e.g., Geth, Nethermind, Erigon, Besu) and consensus clients (e.g., Prysm, Lighthouse, Teku, Nimbus); manage beacon/execution pairings, JWT secrets, and checkpoint sync
- Implement observability and telemetry using Prometheus/Grafana, Splunk, and Datadog for metrics, logs, and distributed tracing
- Own backup/restore/DR strategies: snapshots, archive retention, multi‑AZ and multi‑region failover
- Ensure hardfork readiness: plan and execute client upgrades, compatibility testing, and rollback strategies
- Monitor and mitigate chain reorganizations (reorgs): implement alerts, RPC consistency checks, and failover strategies for deep reorg scenarios
- Lead incident response, post‑mortems, and resilience testing; drive SRE practices and continuous improvement
- Stay current with node software packaging and releases: track upstream client updates, security patches, and dependency changes
- Implement zero-downtime deployment strategies for node upgrades using rolling updates, canary releases, and Kubernetes best practices
- Participate in on-call rotation to provide 24/7 support for production incidents, ensuring rapid response and resolution within defined SLAs
Requirements
- Bachelor's degree in computer science or related field required
- 8+ years in infrastructure/SRE/DevOps roles, with 3+ years operating blockchain nodes in production
- Deep expertise with AWS (EKS, EC2, EBS/EFS, VPC, NLB/ALB, CloudWatch, IAM, KMS) and Kubernetes/EKS
- Strong IaC: Terraform, Helm; CI/CD pipelines
- Hands‑on experience with: Staking validator operations Ethereum: execution + consensus clients; JWT, checkpoint sync, archival strategies
- Bitcoin/Litecoin: bitcoind/litecoind, txindex, mempool policies, pruning/archive
- Observability: Prometheus/Grafana, Splunk, Datadog, alerting, log aggregation
- Experience with hardfork upgrade planning and reorg mitigation strategies
- Experience with high‑throughput RPC products and global traffic management
- Programming proficiency in Python, Bash; strong Linux systems skills
Benefits
- comprehensive health care coverage
- emotional well-being support
- market-leading retirement
- generous paid time off and parental leave
- charitable giving employee match program
- educational assistance including student loan repayment, tuition reimbursement, and learning resources
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