Fidelity is looking for a Principal Blockchain Platform Engineer to design, build, and operate production-grade blockchain infrastructure on AWS and Kubernetes (EKS). You will manage the full lifecycle of node operations for Bitcoin, Litecoin, and Ethereum, ensuring performance, reliability, security, and scalability while delivering robust RPC services, validator operations, and data pipelines.
What You'll Do
- Architect and maintain containerized blockchain nodes on AWS/EKS using Terraform, Helm, and CI/CD pipelines.
- Operate Bitcoin/Litecoin full/archive nodes with high-availability RPC and optimized disk I/O.
- Operate Ethereum execution and consensus clients; manage beacon/execution pairings, JWT secrets, and checkpoint sync.
- Implement observability and telemetry using Prometheus/Grafana, Splunk, and Datadog for metrics, logs, and 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) with alerts, RPC consistency checks, and failover strategies.
- Lead incident response, post-mortems, and resilience testing; drive SRE practices and continuous improvement.
- Stay current with node software packaging and releases, tracking upstream updates and security patches.
- Implement zero-downtime deployment strategies using rolling updates, canary releases, and Kubernetes best practices.
- Participate in an on-call rotation to provide 24/7 support for production incidents within defined SLAs.
What We're Looking For
- A Bachelor's degree in computer science or a related field.
- 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 Infrastructure-as-Code skills: Terraform, Helm; and CI/CD pipelines.
- Hands-on experience with staking validator operations.
- Hands-on experience with Ethereum: execution + consensus clients; JWT, checkpoint sync, archival strategies.
- Hands-on experience with Bitcoin/Litecoin: bitcoind/litecoind, txindex, mempool policies, pruning/archive.
- Observability experience with Prometheus/Grafana, Splunk, Datadog, alerting, and 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.
Technical Stack
- AWS, EKS, EC2, EBS/EFS, VPC, NLB/ALB, CloudWatch, IAM, KMS
- Kubernetes, Terraform, Helm, CI/CD
- Python, Bash, Linux
- Prometheus, Grafana, Splunk, Datadog
- Bitcoin, Litecoin, Ethereum
Team & Environment
The Wallet Blockchain Platform Team is responsible for the backend services and APIs that support digital assets transactions on networks such as Bitcoin and Ethereum. The team will also lead tokenization efforts.
Benefits & Compensation
- Compensation: $107,000-216,000 USD per year.
- Comprehensive health care coverage.
- Emotional well-being support.
- Market-leading retirement benefits.
- Generous paid time off.
- Parental leave.
- Charitable giving employee match program.
- Educational assistance including student loan repayment.
- Tuition reimbursement.
- Learning resources.
Work Mode
This is a hybrid position.
Fidelity is an equal opportunity employer.
