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As a Senior Cloud Engineer on Sokin’s Crypto team, you will architect, deploy, and optimise the cloud infrastructure that powers our stablecoin payments platform and general company services. You’ll design and operate the secure, high-availability environments that underpin real-time blockchain settlement, on-chain and off-chain payment routing, and the fiat on-ramp and off-ramp flows that connect traditional banking rails with digital-asset networks. This role sits at the intersection of cloud-native engineering and crypto infrastructure — you’ll be responsible for everything from running blockchain nodes and managing signing infrastructure to building the resilient, compliant cloud foundations that the rest of the engineering organisation depends on. A critical part of this role involves ensuring that our cloud environments meet the regulatory requirements of both traditional fintech (PCI-DSS, GDPR, SOC 2) and the evolving digital-asset landscape (MiCA, travel rule).
Job Responsibility:
Architect and deploy secure, scalable, and cost-optimised AWS infrastructure to support Sokin’s payments platform, stablecoin settlement services, and real-time transaction processing
Design high-availability, multi-region architectures that meet the latency and throughput demands of cross-border payment flows
Own the end-to-end infrastructure lifecycle — from capacity planning and provisioning through monitoring, optimisation, and decommissioning
Build and maintain blockchain node infrastructure (RPC endpoints, indexers, event listeners) required for on-chain settlement and stablecoin operations
Design and operate secure key management and custody infrastructure for blockchain wallets and transaction signing
Implement infrastructure for fiat on-ramp/off-ramp services, ensuring reliable connectivity between traditional payment rails and blockchain networks
Monitor blockchain node health, chain synchronisation, and mempool conditions to ensure transaction reliability
Develop and maintain IaC using Terraform to automate all infrastructure provisioning, configuration, and lifecycle management
Integrate cloud infrastructure with CI/CD pipelines using GitHub Actions, enabling seamless and repeatable deployments
Implement GitOps workflows and automated testing for infrastructure changes, including policy-as-code compliance checks
Implement cloud security best practices — IAM, encryption at rest and in transit, network segmentation, and secrets management — tailored to fintech and digital-asset regulatory standards
Ensure cloud environments satisfy PCI-DSS, GDPR, SOC 2, and ISO 27001 requirements, as well as emerging digital-asset regulations (MiCA, travel rule)
Collaborate with compliance and security teams to support audit readiness, real-time transaction monitoring, and incident response procedures
Design and enforce network security policies for blockchain-facing infrastructure, including firewall rules, DDoS mitigation, and secure RPC access