Principal Blockchain Platform Engineer

About

Fidelity Digital Assets®, a Fidelity Investments Company, is developing a full‑service enterprise‑grade platform for storing, trading, and servicing digital assets, such as Bitcoin and Ethereum.

Within Fidelity Digital Assets®, 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.

Most roles at Fidelity are Hybrid, requiring associates to work onsite every other week (all business days, M‑F) in a Fidelity office. This does not apply to Remote or fully Onsite roles.

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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

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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

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Compensation

• Base salary range: $107,000 – $216,000 USD per year (placement varies based on responsibilities, scope, geographic location, relevant experience, and other factors)

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Benefits

• Comprehensive health care coverage and emotional‑well‑being support
• Market‑leading retirement plans
• 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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Additional Information

• Certifications: Category: Information Technology
• Applicants must meet Fidelity’s regulatory requirements; certain criminal histories may disqualify candidates under securities and investment regulations.