Senior Blockchain Engineer Jobs in Wisconsin (NOW HIRING)

Job Description: Note: Fidelity will not provide immigration sponsorship for this position We are seeking a highly motivated cybersecurity engineer with a strong focus on key management, encryption technologies, and hardware-backed security solutions who can make an immediate impact. The ideal candidate is curious, ownership-driven, and thrives in a collaborative, knowledge-sharing environment. The Digital Asset Security Operations team within Fidelity Enterprise Cybersecurity (ECS) is responsible for securing mission‑critical platforms that power cryptocurrency and blockchain services. This role sits at the intersection of modern cryptographic systems, cloud-native architecture, and secure infrastructure engineering, with deep exposure to encryption platforms, Hardware Security Modules (HSMs), and containerized workloads in AWS. You will work closely with cybersecurity, risk, and development teams to design, implement, and operate secure key lifecycle management systems and encryption controls across on‑premises infrastructure and distributed cloud-native environments.

• Bachelor’s degree in Computer Science or a related technical discipline
• 6+ years of experience in distributed systems engineering, security engineering, or platform operations
• 2+ years of hands‑on experience with:
  • Enterprise Key Management Systems (KMS)
  • Encryption technologies (data‑at‑rest, data‑in‑transit, and data‑in‑use)
  • Secure API design and cryptographic service integration
  • Experience with Hardware Security Modules (HSMs) for secure key generation, storage, and cryptographic operations (strongly preferred)
  • 1–2 years of experience working with cloud‑native environments, including:
    • AWS (e.g., KMS, Nitro Enclaves, IAM, VPC security)
    • Kubernetes (EKS) and containerized workloads
• Strong understanding of cryptographic principles including: Symmetric/asymmetric encryption Key exchange, signing, and PKI concepts
• Experience securing and hardening Linux and Windows systems, with focus on encryption, identity, and access control
• Practical experience with: Containers & orchestration (Docker/Kubernetes) CI/CD pipelines (GitHub, Jenkins, Artifactory) Infrastructure as Code / automation scripting (Python, Bash, PowerShell, Ansible) Familiarity with secrets management, certificate lifecycle management, and secure workload identity
• Strong analytical and troubleshooting skills in complex distributed systems
• Experience working in Agile environments within large enterprises

• Contribute to the design and operation of secure cryptographic infrastructure supporting Fidelity’s digital asset and blockchain platforms
• Build, integrate, and maintain enterprise key management and encryption solutions, leveraging: AWS-native services (KMS, IAM, Nitro-based isolation) HSM-backed security controls
• Support secure containerized applications running in Kubernetes by implementing: Secrets management Encryption enforcement Workload identity and access control
• Engineer and operate secure CI/CD pipelines to ensure trusted software delivery with integrated cryptographic controls
• Perform security engineering and operational support across distributed cloud environments, including: On call responsibilities Incident, change, and release management Monitoring, logging, and audit integration for cryptographic systems
• Design and implement end-to-end encryption strategies: Data protection across APIs, services, and storage layers Secure communication channels within microservices architectures
• Evaluate and prototype emerging technologies in: Confidential computing (e.g., enclaves) Advanced encryption and key protection mechanisms
• Define and enforce security controls and policies across: Systems, containers, and network layers Authentication, authorization, and access governance

Fidelity is transitioning to a full-time onsite working model through a phased rollout across regions and roles. Currently, some roles and locations require 100% onsite presence, while others require less. Onsite expectations are likely to evolve as the rollout continues. This transition does not apply to fully remote roles.

Please be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self‑regulatory organizations, including FINRA, among others. Those laws and regulations may restrict Fidelity from hiring and/or associating with individuals with certain Criminal Histories.

At Fidelity, we are passionate about making our financial expertise broadly accessible and effective in helping people live the lives they want! We are a privately held company that places a high degree of value in creating and nurturing a work environment that attracts the best talent and reflects our commitment to our associates. We are proud of our diverse and inclusive workplace where we respect and value our associates for their unique perspectives and experiences. For information about working at Fidelity, visit FidelityCareers.com.

Fidelity Investments is an equal opportunity employer. Fidelity will reasonably accommodate applicants with disabilities who need adjustments to participate in the application or interview process. To initiate a request for an accommodation please contact the following: For roles based in the US: Contact the HR Leave of Absence/Accommodation Team by sending an email to accommodations@fmr.com, or by calling 800-835-5099, prompt 2, option 2 For roles based in Ireland: Contact AccommodationsIreland@fmr.com For roles based in Germany: Contact Accommodationsgermany@fmr.com

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